case RTE_FUNCTION:
JumbleExpr(jstate, (Node *) rte->functions);
break;
+ case RTE_TABLEFUNC:
+ JumbleExpr(jstate, (Node *) rte->tablefunc);
+ break;
case RTE_VALUES:
JumbleExpr(jstate, (Node *) rte->values_lists);
break;
JumbleExpr(jstate, rtfunc->funcexpr);
}
break;
+ case T_TableFunc:
+ {
+ TableFunc *tablefunc = (TableFunc *) node;
+
+ JumbleExpr(jstate, tablefunc->docexpr);
+ JumbleExpr(jstate, tablefunc->rowexpr);
+ JumbleExpr(jstate, (Node *) tablefunc->colexprs);
+ }
+ break;
case T_TableSampleClause:
{
TableSampleClause *tsc = (TableSampleClause *) node;
To process values of data type <type>xml</type>, PostgreSQL offers
the functions <function>xpath</function> and
<function>xpath_exists</function>, which evaluate XPath 1.0
- expressions.
+ expressions, and the <function>XMLTABLE</function>
+ table function.
</para>
<sect3 id="functions-xml-processing-xpath">
--------------
t
(1 row)
+]]></screen>
+ </para>
+ </sect3>
+
+ <sect3 id="functions-xml-processing-xmltable">
+ <title><literal>xmltable</literal></title>
+
+ <indexterm>
+ <primary>xmltable</primary>
+ </indexterm>
+
+ <indexterm zone="functions-xml-processing-xmltable">
+ <primary>table function</primary>
+ <secondary>XMLTABLE</secondary>
+ </indexterm>
+
+<synopsis>
+<function>xmltable</function>( <optional>XMLNAMESPACES(<replaceable>namespace uri</replaceable> AS <replaceable>namespace name</replaceable><optional>, ...</optional>)</optional>
+ <replaceable>row_expression</replaceable> PASSING <optional>BY REF</optional> <replaceable>document_expression</replaceable> <optional>BY REF</optional>
+ COLUMNS <replaceable>name</replaceable> { <replaceable>type</replaceable> <optional>PATH <replaceable>column_expression</replaceable></optional> <optional>DEFAULT <replaceable>default_expression</replaceable></optional> <optional>NOT NULL | NULL</optional>
+ | FOR ORDINALITY }
+ <optional>, ...</optional>
+)
+</synopsis>
+
+ <para>
+ The <function>xmltable</function> function produces a table based
+ on the given XML value, an XPath filter to extract rows, and an
+ optional set of column definitions.
+ </para>
+
+ <para>
+ The optional <literal>XMLNAMESPACES</> clause is a comma-separated
+ list of namespaces. It specifies the XML namespaces used in
+ the document and their aliases. A default namespace specification
+ is not currently supported.
+ </para>
+
+ <para>
+ The required <replaceable>row_expression</> argument is an XPath
+ expression that is evaluated against the supplied XML document to
+ obtain an ordered sequence of XML nodes. This sequence is what
+ <function>xmltable</> transforms into output rows.
+ </para>
+
+ <para>
+ <replaceable>document_expression</> provides the XML document to
+ operate on.
+ The <literal>BY REF</literal> clauses have no effect in PostgreSQL,
+ but are allowed for SQL conformance and compatibility with other
+ implementations.
+ The argument must be a well-formed XML document; fragments/forests
+ are not accepted.
+ </para>
+
+ <para>
+ The mandatory <literal>COLUMNS</literal> clause specifies the list
+ of columns in the output table.
+ If the <literal>COLUMNS</> clause is omitted, the rows in the result
+ set contain a single column of type <literal>xml</> containing the
+ data matched by <replaceable>row_expression</>.
+ If <literal>COLUMNS</literal> is specified, each entry describes a
+ single column.
+ See the syntax summary above for the format.
+ The column name and type are required; the path, default and
+ nullability clauses are optional.
+ </para>
+
+ <para>
+ A column marked <literal>FOR ORDINALITY</literal> will be populated
+ with row numbers matching the order in which the
+ output rows appeared in the original input XML document.
+ At most one column may be marked <literal>FOR ORDINALITY</literal>.
+ </para>
+
+ <para>
+ The <literal>column_expression</> for a column is an XPath expression
+ that is evaluated for each row, relative to the result of the
+ <replaceable>row_expression</>, to find the value of the column.
+ If no <literal>column_expression</> is given, then the column name
+ is used as an implicit path.
+ </para>
+
+ <para>
+ If a column's XPath expression returns multiple elements, an error
+ is raised.
+ If the expression matches an empty tag, the result is an
+ empty string (not <literal>NULL</>).
+ Any <literal>xsi:nil</> attributes are ignored.
+ </para>
+
+ <para>
+ The text body of the XML matched by the <replaceable>column_expression</>
+ is used as the column value. Multiple <literal>text()</literal> nodes
+ within an element are concatenated in order. Any child elements,
+ processing instructions, and comments are ignored, but the text contents
+ of child elements are concatenated to the result.
+ Note that the whitespace-only <literal>text()</> node between two non-text
+ elements is preserved, and that leading whitespace on a <literal>text()</>
+ node is not flattened.
+ </para>
+
+ <para>
+ If the path expression does not match for a given row but
+ <replaceable>default_expression</> is specified, the value resulting
+ from evaluating that expression is used.
+ If no <literal>DEFAULT</> clause is given for the column,
+ the field will be set to <literal>NULL</>.
+ It is possible for a <replaceable>default_expression</> to reference
+ the value of output columns that appear prior to it in the column list,
+ so the default of one column may be based on the value of another
+ column.
+ </para>
+
+ <para>
+ Columns may be marked <literal>NOT NULL</>. If the
+ <replaceable>column_expression</> for a <literal>NOT NULL</> column
+ does not match anything and there is no <literal>DEFAULT</> or the
+ <replaceable>default_expression</> also evaluates to null, an error
+ is reported.
+ </para>
+
+ <para>
+ Unlike regular PostgreSQL functions, <replaceable>column_expression</>
+ and <replaceable>default_expression</> are not evaluated to a simple
+ value before calling the function.
+ <replaceable>column_expression</> is normally evaluated
+ exactly once per input row, and <replaceable>default_expression</>
+ is evaluated each time a default is needed for a field.
+ If the expression qualifies as stable or immutable the repeat
+ evaluation may be skipped.
+ Effectively <function>xmltable</> behaves more like a subquery than a
+ function call.
+ This means that you can usefully use volatile functions like
+ <function>nextval</> in <replaceable>default_expression</>, and
+ <replaceable>column_expression</> may depend on other parts of the
+ XML document.
+ </para>
+
+ <para>
+ Examples:
+ <screen><![CDATA[
+CREATE TABLE xmldata AS SELECT
+xml $$
+<ROWS>
+ <ROW id="1">
+ <COUNTRY_ID>AU</COUNTRY_ID>
+ <COUNTRY_NAME>Australia</COUNTRY_NAME>
+ </ROW>
+ <ROW id="5">
+ <COUNTRY_ID>JP</COUNTRY_ID>
+ <COUNTRY_NAME>Japan</COUNTRY_NAME>
+ <PREMIER_NAME>Shinzo Abe</PREMIER_NAME>
+ <SIZE unit="sq_mi">145935</SIZE>
+ </ROW>
+ <ROW id="6">
+ <COUNTRY_ID>SG</COUNTRY_ID>
+ <COUNTRY_NAME>Singapore</COUNTRY_NAME>
+ <SIZE unit="sq_km">697</SIZE>
+ </ROW>
+</ROWS>
+$$ AS data;
+
+SELECT xmltable.*
+ FROM xmldata,
+ XMLTABLE('//ROWS/ROW'
+ PASSING data
+ COLUMNS id int PATH '@id',
+ ordinality FOR ORDINALITY,
+ "COUNTRY_NAME" text,
+ country_id text PATH 'COUNTRY_ID',
+ size_sq_km float PATH 'SIZE[@unit = "sq_km"]',
+ size_other text PATH
+ 'concat(SIZE[@unit!="sq_km"], " ", SIZE[@unit!="sq_km"]/@unit)',
+ premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified') ;
+
+ id | ordinality | COUNTRY_NAME | country_id | size_sq_km | size_other | premier_name
+----+------------+--------------+------------+------------+--------------+---------------
+ 1 | 1 | Australia | AU | | | not specified
+ 5 | 2 | Japan | JP | | 145935 sq_mi | Shinzo Abe
+ 6 | 3 | Singapore | SG | 697 | | not specified
+]]></screen>
+
+ The following example shows concatenation of multiple text() nodes,
+ usage of the column name as XPath filter, and the treatment of whitespace,
+ XML comments and processing instructions:
+
+ <screen><![CDATA[
+CREATE TABLE xmlelements AS SELECT
+xml $$
+ <root>
+ <element> Hello<!-- xyxxz -->2a2<?aaaaa?> <!--x--> bbb<x>xxx</x>CC </element>
+ </root>
+$$ AS data;
+
+SELECT xmltable.*
+ FROM xmlelements, XMLTABLE('/root' PASSING data COLUMNS element text);
+ element
+----------------------
+ Hello2a2 bbbCC
]]></screen>
</para>
</sect3>
case T_TidScan:
case T_SubqueryScan:
case T_FunctionScan:
+ case T_TableFuncScan:
case T_ValuesScan:
case T_CteScan:
case T_WorkTableScan:
case T_FunctionScan:
pname = sname = "Function Scan";
break;
+ case T_TableFuncScan:
+ pname = sname = "Table Function Scan";
+ break;
case T_ValuesScan:
pname = sname = "Values Scan";
break;
case T_TidScan:
case T_SubqueryScan:
case T_FunctionScan:
+ case T_TableFuncScan:
case T_ValuesScan:
case T_CteScan:
case T_WorkTableScan:
show_instrumentation_count("Rows Removed by Filter", 1,
planstate, es);
break;
+ case T_TableFuncScan:
+ if (es->verbose)
+ {
+ TableFunc *tablefunc = ((TableFuncScan *) plan)->tablefunc;
+
+ show_expression((Node *) tablefunc,
+ "Table Function Call", planstate, ancestors,
+ es->verbose, es);
+ }
+ show_scan_qual(plan->qual, "Filter", planstate, ancestors, es);
+ if (plan->qual)
+ show_instrumentation_count("Rows Removed by Filter", 1,
+ planstate, es);
+ break;
case T_TidScan:
{
/*
objecttag = "Function Name";
}
break;
+ case T_TableFuncScan:
+ Assert(rte->rtekind == RTE_TABLEFUNC);
+ objectname = "xmltable";
+ objecttag = "Table Function Name";
+ break;
case T_ValuesScan:
Assert(rte->rtekind == RTE_VALUES);
break;
nodeSamplescan.o nodeSeqscan.o nodeSetOp.o nodeSort.o nodeUnique.o \
nodeValuesscan.o nodeCtescan.o nodeWorktablescan.o \
nodeGroup.o nodeSubplan.o nodeSubqueryscan.o nodeTidscan.o \
- nodeForeignscan.o nodeWindowAgg.o tstoreReceiver.o tqueue.o spi.o
+ nodeForeignscan.o nodeWindowAgg.o tstoreReceiver.o tqueue.o spi.o \
+ nodeTableFuncscan.o
include $(top_srcdir)/src/backend/common.mk
#include "executor/nodeSort.h"
#include "executor/nodeSubplan.h"
#include "executor/nodeSubqueryscan.h"
+#include "executor/nodeTableFuncscan.h"
#include "executor/nodeTidscan.h"
#include "executor/nodeUnique.h"
#include "executor/nodeValuesscan.h"
ExecReScanFunctionScan((FunctionScanState *) node);
break;
+ case T_TableFuncScanState:
+ ExecReScanTableFuncScan((TableFuncScanState *) node);
+ break;
+
case T_ValuesScanState:
ExecReScanValuesScan((ValuesScanState *) node);
break;
{
case T_Material:
case T_FunctionScan:
+ case T_TableFuncScan:
case T_CteScan:
case T_WorkTableScan:
case T_Sort:
#include "executor/nodeSort.h"
#include "executor/nodeSubplan.h"
#include "executor/nodeSubqueryscan.h"
+#include "executor/nodeTableFuncscan.h"
#include "executor/nodeTidscan.h"
#include "executor/nodeUnique.h"
#include "executor/nodeValuesscan.h"
estate, eflags);
break;
+ case T_TableFuncScan:
+ result = (PlanState *) ExecInitTableFuncScan((TableFuncScan *) node,
+ estate, eflags);
+ break;
+
case T_ValuesScan:
result = (PlanState *) ExecInitValuesScan((ValuesScan *) node,
estate, eflags);
result = ExecFunctionScan((FunctionScanState *) node);
break;
+ case T_TableFuncScanState:
+ result = ExecTableFuncScan((TableFuncScanState *) node);
+ break;
+
case T_ValuesScanState:
result = ExecValuesScan((ValuesScanState *) node);
break;
ExecEndFunctionScan((FunctionScanState *) node);
break;
+ case T_TableFuncScanState:
+ ExecEndTableFuncScan((TableFuncScanState *) node);
+ break;
+
case T_ValuesScanState:
ExecEndValuesScan((ValuesScanState *) node);
break;
--- /dev/null
+/*-------------------------------------------------------------------------
+ *
+ * nodeTableFuncscan.c
+ * Support routines for scanning RangeTableFunc (XMLTABLE like functions).
+ *
+ * Portions Copyright (c) 1996-2017, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ *
+ * IDENTIFICATION
+ * src/backend/executor/nodeTableFuncscan.c
+ *
+ *-------------------------------------------------------------------------
+ */
+/*
+ * INTERFACE ROUTINES
+ * ExecTableFuncscan scans a function.
+ * ExecFunctionNext retrieve next tuple in sequential order.
+ * ExecInitTableFuncscan creates and initializes a TableFuncscan node.
+ * ExecEndTableFuncscan releases any storage allocated.
+ * ExecReScanTableFuncscan rescans the function
+ */
+#include "postgres.h"
+
+#include "nodes/execnodes.h"
+#include "executor/executor.h"
+#include "executor/nodeTableFuncscan.h"
+#include "executor/tablefunc.h"
+#include "miscadmin.h"
+#include "utils/builtins.h"
+#include "utils/lsyscache.h"
+#include "utils/memutils.h"
+#include "utils/xml.h"
+
+
+static TupleTableSlot *TableFuncNext(TableFuncScanState *node);
+static bool TableFuncRecheck(TableFuncScanState *node, TupleTableSlot *slot);
+
+static void tfuncFetchRows(TableFuncScanState *tstate, ExprContext *econtext);
+static void tfuncInitialize(TableFuncScanState *tstate, ExprContext *econtext, Datum doc);
+static void tfuncLoadRows(TableFuncScanState *tstate, ExprContext *econtext);
+
+/* ----------------------------------------------------------------
+ * Scan Support
+ * ----------------------------------------------------------------
+ */
+/* ----------------------------------------------------------------
+ * TableFuncNext
+ *
+ * This is a workhorse for ExecTableFuncscan
+ * ----------------------------------------------------------------
+ */
+static TupleTableSlot *
+TableFuncNext(TableFuncScanState *node)
+{
+ TupleTableSlot *scanslot;
+
+ scanslot = node->ss.ss_ScanTupleSlot;
+
+ /*
+ * If first time through, read all tuples from function and put them in a
+ * tuplestore. Subsequent calls just fetch tuples from tuplestore.
+ */
+ if (node->tupstore == NULL)
+ tfuncFetchRows(node, node->ss.ps.ps_ExprContext);
+
+ /*
+ * Get the next tuple from tuplestore.
+ */
+ (void) tuplestore_gettupleslot(node->tupstore,
+ true,
+ false,
+ scanslot);
+ return scanslot;
+}
+
+/*
+ * TableFuncRecheck -- access method routine to recheck a tuple in EvalPlanQual
+ */
+static bool
+TableFuncRecheck(TableFuncScanState *node, TupleTableSlot *slot)
+{
+ /* nothing to check */
+ return true;
+}
+
+/* ----------------------------------------------------------------
+ * ExecTableFuncscan(node)
+ *
+ * Scans the function sequentially and returns the next qualifying
+ * tuple.
+ * We call the ExecScan() routine and pass it the appropriate
+ * access method functions.
+ * ----------------------------------------------------------------
+ */
+TupleTableSlot *
+ExecTableFuncScan(TableFuncScanState *node)
+{
+ return ExecScan(&node->ss,
+ (ExecScanAccessMtd) TableFuncNext,
+ (ExecScanRecheckMtd) TableFuncRecheck);
+}
+
+/* ----------------------------------------------------------------
+ * ExecInitTableFuncscan
+ * ----------------------------------------------------------------
+ */
+TableFuncScanState *
+ExecInitTableFuncScan(TableFuncScan *node, EState *estate, int eflags)
+{
+ TableFuncScanState *scanstate;
+ TableFunc *tf = node->tablefunc;
+ TupleDesc tupdesc;
+ int i;
+
+ /* check for unsupported flags */
+ Assert(!(eflags & EXEC_FLAG_MARK));
+
+ /*
+ * TableFuncscan should not have any children.
+ */
+ Assert(outerPlan(node) == NULL);
+ Assert(innerPlan(node) == NULL);
+
+ /*
+ * create new ScanState for node
+ */
+ scanstate = makeNode(TableFuncScanState);
+ scanstate->ss.ps.plan = (Plan *) node;
+ scanstate->ss.ps.state = estate;
+
+ /*
+ * Miscellaneous initialization
+ *
+ * create expression context for node
+ */
+ ExecAssignExprContext(estate, &scanstate->ss.ps);
+
+ /*
+ * initialize child expressions
+ */
+ scanstate->ss.ps.targetlist = (List *)
+ ExecInitExpr((Expr *) node->scan.plan.targetlist,
+ (PlanState *) scanstate);
+ scanstate->ss.ps.qual = (List *)
+ ExecInitExpr((Expr *) node->scan.plan.qual,
+ (PlanState *) scanstate);
+
+ /*
+ * tuple table initialization
+ */
+ ExecInitResultTupleSlot(estate, &scanstate->ss.ps);
+ ExecInitScanTupleSlot(estate, &scanstate->ss);
+
+ /*
+ * initialize source tuple type
+ */
+ tupdesc = BuildDescFromLists(tf->colnames,
+ tf->coltypes,
+ tf->coltypmods,
+ tf->colcollations);
+
+ ExecAssignScanType(&scanstate->ss, tupdesc);
+
+ /*
+ * Initialize result tuple type and projection info.
+ */
+ ExecAssignResultTypeFromTL(&scanstate->ss.ps);
+ ExecAssignScanProjectionInfo(&scanstate->ss);
+
+ /* Only XMLTABLE is supported currently */
+ scanstate->routine = &XmlTableRoutine;
+
+ scanstate->perValueCxt =
+ AllocSetContextCreate(CurrentMemoryContext,
+ "TableFunc per value context",
+ ALLOCSET_DEFAULT_SIZES);
+ scanstate->opaque = NULL; /* initialized at runtime */
+
+ scanstate->ns_names = tf->ns_names;
+
+ scanstate->ns_uris = (List *)
+ ExecInitExpr((Expr *) tf->ns_uris, (PlanState *) scanstate);
+ scanstate->docexpr =
+ ExecInitExpr((Expr *) tf->docexpr, (PlanState *) scanstate);
+ scanstate->rowexpr =
+ ExecInitExpr((Expr *) tf->rowexpr, (PlanState *) scanstate);
+ scanstate->colexprs = (List *)
+ ExecInitExpr((Expr *) tf->colexprs, (PlanState *) scanstate);
+ scanstate->coldefexprs = (List *)
+ ExecInitExpr((Expr *) tf->coldefexprs, (PlanState *) scanstate);
+
+ scanstate->notnulls = tf->notnulls;
+
+ /* these are allocated now and initialized later */
+ scanstate->in_functions = palloc(sizeof(FmgrInfo) * tupdesc->natts);
+ scanstate->typioparams = palloc(sizeof(Oid) * tupdesc->natts);
+
+ /*
+ * Fill in the necessary fmgr infos.
+ */
+ for (i = 0; i < tupdesc->natts; i++)
+ {
+ Oid in_funcid;
+
+ getTypeInputInfo(tupdesc->attrs[i]->atttypid,
+ &in_funcid, &scanstate->typioparams[i]);
+ fmgr_info(in_funcid, &scanstate->in_functions[i]);
+ }
+
+ return scanstate;
+}
+
+/* ----------------------------------------------------------------
+ * ExecEndTableFuncscan
+ *
+ * frees any storage allocated through C routines.
+ * ----------------------------------------------------------------
+ */
+void
+ExecEndTableFuncScan(TableFuncScanState *node)
+{
+ /*
+ * Free the exprcontext
+ */
+ ExecFreeExprContext(&node->ss.ps);
+
+ /*
+ * clean out the tuple table
+ */
+ ExecClearTuple(node->ss.ps.ps_ResultTupleSlot);
+ ExecClearTuple(node->ss.ss_ScanTupleSlot);
+
+ /*
+ * Release tuplestore resources
+ */
+ if (node->tupstore != NULL)
+ tuplestore_end(node->tupstore);
+ node->tupstore = NULL;
+}
+
+/* ----------------------------------------------------------------
+ * ExecReScanTableFuncscan
+ *
+ * Rescans the relation.
+ * ----------------------------------------------------------------
+ */
+void
+ExecReScanTableFuncScan(TableFuncScanState *node)
+{
+ Bitmapset *chgparam = node->ss.ps.chgParam;
+
+ ExecClearTuple(node->ss.ps.ps_ResultTupleSlot);
+ ExecScanReScan(&node->ss);
+
+ /*
+ * Recompute when parameters are changed.
+ */
+ if (chgparam)
+ {
+ if (node->tupstore != NULL)
+ {
+ tuplestore_end(node->tupstore);
+ node->tupstore = NULL;
+ }
+ }
+
+ if (node->tupstore != NULL)
+ tuplestore_rescan(node->tupstore);
+}
+
+/* ----------------------------------------------------------------
+ * tfuncFetchRows
+ *
+ * Read rows from a TableFunc producer
+ * ----------------------------------------------------------------
+ */
+static void
+tfuncFetchRows(TableFuncScanState *tstate, ExprContext *econtext)
+{
+ const TableFuncRoutine *routine = tstate->routine;
+ MemoryContext oldcxt;
+ Datum value;
+ bool isnull;
+
+ Assert(tstate->opaque == NULL);
+
+ /* build tuplestore for the result */
+ oldcxt = MemoryContextSwitchTo(econtext->ecxt_per_query_memory);
+ tstate->tupstore = tuplestore_begin_heap(false, false, work_mem);
+
+ PG_TRY();
+ {
+ routine->InitOpaque(tstate,
+ tstate->ss.ss_ScanTupleSlot->tts_tupleDescriptor->natts);
+
+ /*
+ * If evaluating the document expression returns NULL, the table
+ * expression is empty and we return immediately.
+ */
+ value = ExecEvalExpr(tstate->docexpr, econtext, &isnull);
+
+ if (!isnull)
+ {
+ /* otherwise, pass the document value to the table builder */
+ tfuncInitialize(tstate, econtext, value);
+
+ /* initialize ordinality counter */
+ tstate->ordinal = 1;
+
+ /* Load all rows into the tuplestore, and we're done */
+ tfuncLoadRows(tstate, econtext);
+ }
+ }
+ PG_CATCH();
+ {
+ if (tstate->opaque != NULL)
+ routine->DestroyOpaque(tstate);
+ PG_RE_THROW();
+ }
+ PG_END_TRY();
+
+ /* return to original memory context, and clean up */
+ MemoryContextSwitchTo(oldcxt);
+
+ if (tstate->opaque != NULL)
+ {
+ routine->DestroyOpaque(tstate);
+ tstate->opaque = NULL;
+ }
+
+ return;
+}
+
+/*
+ * Fill in namespace declarations, the row filter, and column filters in a
+ * table expression builder context.
+ */
+static void
+tfuncInitialize(TableFuncScanState *tstate, ExprContext *econtext, Datum doc)
+{
+ const TableFuncRoutine *routine = tstate->routine;
+ TupleDesc tupdesc;
+ ListCell *lc1,
+ *lc2;
+ bool isnull;
+ int colno;
+ Datum value;
+ int ordinalitycol =
+ ((TableFuncScan *) (tstate->ss.ps.plan))->tablefunc->ordinalitycol;
+
+ /*
+ * Install the document as a possibly-toasted Datum into the tablefunc
+ * context.
+ */
+ routine->SetDocument(tstate, doc);
+
+ /* Evaluate namespace specifications */
+ forboth(lc1, tstate->ns_uris, lc2, tstate->ns_names)
+ {
+ ExprState *expr = (ExprState *) lfirst(lc1);
+ char *ns_name = strVal(lfirst(lc2));
+ char *ns_uri;
+
+ value = ExecEvalExpr((ExprState *) expr, econtext, &isnull);
+ if (isnull)
+ ereport(ERROR,
+ (errcode(ERRCODE_NULL_VALUE_NOT_ALLOWED),
+ errmsg("namespace URI must not be null")));
+ ns_uri = TextDatumGetCString(value);
+
+ routine->SetNamespace(tstate, ns_name, ns_uri);
+ }
+
+ /* Install the row filter expression into the table builder context */
+ value = ExecEvalExpr(tstate->rowexpr, econtext, &isnull);
+ if (isnull)
+ ereport(ERROR,
+ (errcode(ERRCODE_NULL_VALUE_NOT_ALLOWED),
+ errmsg("row filter expression must not be null")));
+
+ routine->SetRowFilter(tstate, TextDatumGetCString(value));
+
+ /*
+ * Install the column filter expressions into the table builder context.
+ * If an expression is given, use that; otherwise the column name itself
+ * is the column filter.
+ */
+ colno = 0;
+ tupdesc = tstate->ss.ss_ScanTupleSlot->tts_tupleDescriptor;
+ foreach(lc1, tstate->colexprs)
+ {
+ char *colfilter;
+
+ if (colno != ordinalitycol)
+ {
+ ExprState *colexpr = lfirst(lc1);
+
+ if (colexpr != NULL)
+ {
+ value = ExecEvalExpr(colexpr, econtext, &isnull);
+ if (isnull)
+ ereport(ERROR,
+ (errcode(ERRCODE_NULL_VALUE_NOT_ALLOWED),
+ errmsg("column filter expression must not be null"),
+ errdetail("Filter for column \"%s\" is null.",
+ NameStr(tupdesc->attrs[colno]->attname))));
+ colfilter = TextDatumGetCString(value);
+ }
+ else
+ colfilter = NameStr(tupdesc->attrs[colno]->attname);
+
+ routine->SetColumnFilter(tstate, colfilter, colno);
+ }
+
+ colno++;
+ }
+}
+
+/*
+ * Load all the rows from the TableFunc table builder into a tuplestore.
+ */
+static void
+tfuncLoadRows(TableFuncScanState *tstate, ExprContext *econtext)
+{
+ const TableFuncRoutine *routine = tstate->routine;
+ TupleTableSlot *slot = tstate->ss.ss_ScanTupleSlot;
+ TupleDesc tupdesc = slot->tts_tupleDescriptor;
+ Datum *values = slot->tts_values;
+ bool *nulls = slot->tts_isnull;
+ int natts = tupdesc->natts;
+ MemoryContext oldcxt;
+ int ordinalitycol;
+
+ ordinalitycol =
+ ((TableFuncScan *) (tstate->ss.ps.plan))->tablefunc->ordinalitycol;
+ oldcxt = MemoryContextSwitchTo(tstate->perValueCxt);
+
+ /*
+ * Keep requesting rows from the table builder until there aren't any.
+ */
+ while (routine->FetchRow(tstate))
+ {
+ ListCell *cell = list_head(tstate->coldefexprs);
+ int colno;
+
+ ExecClearTuple(tstate->ss.ss_ScanTupleSlot);
+
+ /*
+ * Obtain the value of each column for this row, installing them into the
+ * slot; then add the tuple to the tuplestore.
+ */
+ for (colno = 0; colno < natts; colno++)
+ {
+ if (colno == ordinalitycol)
+ {
+ /* Fast path for ordinality column */
+ values[colno] = Int32GetDatum(tstate->ordinal++);
+ nulls[colno] = false;
+ }
+ else
+ {
+ bool isnull;
+
+ values[colno] = routine->GetValue(tstate,
+ colno,
+ tupdesc->attrs[colno]->atttypid,
+ tupdesc->attrs[colno]->atttypmod,
+ &isnull);
+
+ /* No value? Evaluate and apply the default, if any */
+ if (isnull && cell != NULL)
+ {
+ ExprState *coldefexpr = (ExprState *) lfirst(cell);
+
+ if (coldefexpr != NULL)
+ values[colno] = ExecEvalExpr(coldefexpr, econtext,
+ &isnull);
+ }
+
+ /* Verify a possible NOT NULL constraint */
+ if (isnull && bms_is_member(colno, tstate->notnulls))
+ ereport(ERROR,
+ (errcode(ERRCODE_NULL_VALUE_NOT_ALLOWED),
+ errmsg("null is not allowed in column \"%s\"",
+ NameStr(tupdesc->attrs[colno]->attname))));
+
+ nulls[colno] = isnull;
+ }
+
+ /* advance list of default expressions */
+ if (cell != NULL)
+ cell = lnext(cell);
+ }
+
+ tuplestore_putvalues(tstate->tupstore, tupdesc, values, nulls);
+
+ MemoryContextReset(tstate->perValueCxt);
+ }
+
+ MemoryContextSwitchTo(oldcxt);
+}
return newnode;
}
+/*
+ * _copyTableFuncScan
+ */
+static TableFuncScan *
+_copyTableFuncScan(const TableFuncScan *from)
+{
+ TableFuncScan *newnode = makeNode(TableFuncScan);
+
+ /*
+ * copy node superclass fields
+ */
+ CopyScanFields((const Scan *) from, (Scan *) newnode);
+
+ /*
+ * copy remainder of node
+ */
+ COPY_NODE_FIELD(tablefunc);
+
+ return newnode;
+}
+
/*
* _copyValuesScan
*/
return newnode;
}
+/*
+ * _copyTableFunc
+ */
+static TableFunc *
+_copyTableFunc(const TableFunc *from)
+{
+ TableFunc *newnode = makeNode(TableFunc);
+
+ COPY_NODE_FIELD(ns_names);
+ COPY_NODE_FIELD(ns_uris);
+ COPY_NODE_FIELD(docexpr);
+ COPY_NODE_FIELD(rowexpr);
+ COPY_NODE_FIELD(colnames);
+ COPY_NODE_FIELD(coltypes);
+ COPY_NODE_FIELD(coltypmods);
+ COPY_NODE_FIELD(colcollations);
+ COPY_NODE_FIELD(colexprs);
+ COPY_NODE_FIELD(coldefexprs);
+ COPY_BITMAPSET_FIELD(notnulls);
+ COPY_SCALAR_FIELD(ordinalitycol);
+ COPY_LOCATION_FIELD(location);
+
+ return newnode;
+}
+
/*
* _copyIntoClause
*/
COPY_NODE_FIELD(joinaliasvars);
COPY_NODE_FIELD(functions);
COPY_SCALAR_FIELD(funcordinality);
+ COPY_NODE_FIELD(tablefunc);
COPY_NODE_FIELD(values_lists);
COPY_STRING_FIELD(ctename);
COPY_SCALAR_FIELD(ctelevelsup);
return newnode;
}
+static RangeTableFunc *
+_copyRangeTableFunc(const RangeTableFunc *from)
+{
+ RangeTableFunc *newnode = makeNode(RangeTableFunc);
+
+ COPY_SCALAR_FIELD(lateral);
+ COPY_NODE_FIELD(docexpr);
+ COPY_NODE_FIELD(rowexpr);
+ COPY_NODE_FIELD(namespaces);
+ COPY_NODE_FIELD(columns);
+ COPY_NODE_FIELD(alias);
+ COPY_LOCATION_FIELD(location);
+
+ return newnode;
+}
+
+static RangeTableFuncCol *
+_copyRangeTableFuncCol(const RangeTableFuncCol *from)
+{
+ RangeTableFuncCol *newnode = makeNode(RangeTableFuncCol);
+
+ COPY_STRING_FIELD(colname);
+ COPY_NODE_FIELD(typeName);
+ COPY_SCALAR_FIELD(for_ordinality);
+ COPY_SCALAR_FIELD(is_not_null);
+ COPY_NODE_FIELD(colexpr);
+ COPY_NODE_FIELD(coldefexpr);
+ COPY_LOCATION_FIELD(location);
+
+ return newnode;
+}
+
static TypeCast *
_copyTypeCast(const TypeCast *from)
{
case T_FunctionScan:
retval = _copyFunctionScan(from);
break;
+ case T_TableFuncScan:
+ retval = _copyTableFuncScan(from);
+ break;
case T_ValuesScan:
retval = _copyValuesScan(from);
break;
case T_RangeVar:
retval = _copyRangeVar(from);
break;
+ case T_TableFunc:
+ retval = _copyTableFunc(from);
+ break;
case T_IntoClause:
retval = _copyIntoClause(from);
break;
case T_RangeTableSample:
retval = _copyRangeTableSample(from);
break;
+ case T_RangeTableFunc:
+ retval = _copyRangeTableFunc(from);
+ break;
+ case T_RangeTableFuncCol:
+ retval = _copyRangeTableFuncCol(from);
+ break;
case T_TypeName:
retval = _copyTypeName(from);
break;
return true;
}
+static bool
+_equalTableFunc(const TableFunc *a, const TableFunc *b)
+{
+ COMPARE_NODE_FIELD(ns_names);
+ COMPARE_NODE_FIELD(ns_uris);
+ COMPARE_NODE_FIELD(docexpr);
+ COMPARE_NODE_FIELD(rowexpr);
+ COMPARE_NODE_FIELD(colnames);
+ COMPARE_NODE_FIELD(coltypes);
+ COMPARE_NODE_FIELD(coltypes);
+ COMPARE_NODE_FIELD(colcollations);
+ COMPARE_NODE_FIELD(colexprs);
+ COMPARE_NODE_FIELD(coldefexprs);
+ COMPARE_BITMAPSET_FIELD(notnulls);
+ COMPARE_SCALAR_FIELD(ordinalitycol);
+ COMPARE_LOCATION_FIELD(location);
+
+ return true;
+}
+
static bool
_equalIntoClause(const IntoClause *a, const IntoClause *b)
{
return true;
}
+static bool
+_equalRangeTableFunc(const RangeTableFunc *a, const RangeTableFunc *b)
+{
+ COMPARE_SCALAR_FIELD(lateral);
+ COMPARE_NODE_FIELD(docexpr);
+ COMPARE_NODE_FIELD(rowexpr);
+ COMPARE_NODE_FIELD(namespaces);
+ COMPARE_NODE_FIELD(columns);
+ COMPARE_NODE_FIELD(alias);
+ COMPARE_LOCATION_FIELD(location);
+
+ return true;
+}
+
+static bool
+_equalRangeTableFuncCol(const RangeTableFuncCol *a, const RangeTableFuncCol *b)
+{
+ COMPARE_STRING_FIELD(colname);
+ COMPARE_NODE_FIELD(typeName);
+ COMPARE_SCALAR_FIELD(for_ordinality);
+ COMPARE_NODE_FIELD(typeName);
+ COMPARE_SCALAR_FIELD(is_not_null);
+ COMPARE_NODE_FIELD(colexpr);
+ COMPARE_NODE_FIELD(coldefexpr);
+ COMPARE_LOCATION_FIELD(location);
+
+ return true;
+}
+
+
static bool
_equalIndexElem(const IndexElem *a, const IndexElem *b)
{
COMPARE_SCALAR_FIELD(jointype);
COMPARE_NODE_FIELD(joinaliasvars);
COMPARE_NODE_FIELD(functions);
+ COMPARE_NODE_FIELD(tablefunc);
COMPARE_SCALAR_FIELD(funcordinality);
COMPARE_NODE_FIELD(values_lists);
COMPARE_STRING_FIELD(ctename);
case T_RangeVar:
retval = _equalRangeVar(a, b);
break;
+ case T_TableFunc:
+ retval = _equalTableFunc(a, b);
+ break;
case T_IntoClause:
retval = _equalIntoClause(a, b);
break;
case T_RangeTableSample:
retval = _equalRangeTableSample(a, b);
break;
+ case T_RangeTableFunc:
+ retval = _equalRangeTableFunc(a, b);
+ break;
+ case T_RangeTableFuncCol:
+ retval = _equalRangeTableFuncCol(a, b);
+ break;
case T_TypeName:
retval = _equalTypeName(a, b);
break;
default:
/*
- * RTE is a join, subselect, or VALUES. We represent this as a
- * whole-row Var of RECORD type. (Note that in most cases the Var
- * will be expanded to a RowExpr during planning, but that is not
- * our concern here.)
+ * RTE is a join, subselect, tablefunc, or VALUES. We represent
+ * this as a whole-row Var of RECORD type. (Note that in most
+ * cases the Var will be expanded to a RowExpr during planning,
+ * but that is not our concern here.)
*/
result = makeVar(varno,
InvalidAttrNumber,
case T_RangeVar:
loc = ((const RangeVar *) expr)->location;
break;
+ case T_TableFunc:
+ loc = ((const TableFunc *) expr)->location;
+ break;
case T_Var:
loc = ((const Var *) expr)->location;
break;
return true;
}
break;
+ case T_TableFunc:
+ {
+ TableFunc *tf = (TableFunc *) node;
+
+ if (walker(tf->ns_uris, context))
+ return true;
+ if (walker(tf->docexpr, context))
+ return true;
+ if (walker(tf->rowexpr, context))
+ return true;
+ if (walker(tf->colexprs, context))
+ return true;
+ if (walker(tf->coldefexprs, context))
+ return true;
+ }
+ break;
default:
elog(ERROR, "unrecognized node type: %d",
(int) nodeTag(node));
if (walker(rte->functions, context))
return true;
break;
+ case RTE_TABLEFUNC:
+ if (walker(rte->tablefunc, context))
+ return true;
+ break;
case RTE_VALUES:
if (walker(rte->values_lists, context))
return true;
return (Node *) newnode;
}
break;
+ case T_TableFunc:
+ {
+ TableFunc *tf = (TableFunc *) node;
+ TableFunc *newnode;
+
+ FLATCOPY(newnode, tf, TableFunc);
+ MUTATE(newnode->ns_uris, tf->ns_uris, List *);
+ MUTATE(newnode->docexpr, tf->docexpr, Node *);
+ MUTATE(newnode->rowexpr, tf->rowexpr, Node *);
+ MUTATE(newnode->colexprs, tf->colexprs, List *);
+ MUTATE(newnode->coldefexprs, tf->coldefexprs, List *);
+ return (Node *) newnode;
+ }
+ break;
default:
elog(ERROR, "unrecognized node type: %d",
(int) nodeTag(node));
case RTE_FUNCTION:
MUTATE(newrte->functions, rte->functions, List *);
break;
+ case RTE_TABLEFUNC:
+ MUTATE(newrte->tablefunc, rte->tablefunc, TableFunc *);
+ break;
case RTE_VALUES:
MUTATE(newrte->values_lists, rte->values_lists, List *);
break;
return true;
}
break;
+ case T_RangeTableFunc:
+ {
+ RangeTableFunc *rtf = (RangeTableFunc *) node;
+
+ if (walker(rtf->docexpr, context))
+ return true;
+ if (walker(rtf->rowexpr, context))
+ return true;
+ if (walker(rtf->namespaces, context))
+ return true;
+ if (walker(rtf->columns, context))
+ return true;
+ if (walker(rtf->alias, context))
+ return true;
+ }
+ break;
+ case T_RangeTableFuncCol:
+ {
+ RangeTableFuncCol *rtfc = (RangeTableFuncCol *) node;
+
+ if (walker(rtfc->colexpr, context))
+ return true;
+ if (walker(rtfc->coldefexpr, context))
+ return true;
+ }
+ break;
case T_TypeName:
{
TypeName *tn = (TypeName *) node;
WRITE_BOOL_FIELD(funcordinality);
}
+static void
+_outTableFuncScan(StringInfo str, const TableFuncScan *node)
+{
+ WRITE_NODE_TYPE("TABLEFUNCSCAN");
+
+ _outScanInfo(str, (const Scan *) node);
+
+ WRITE_NODE_FIELD(tablefunc);
+}
+
static void
_outValuesScan(StringInfo str, const ValuesScan *node)
{
WRITE_LOCATION_FIELD(location);
}
+static void
+_outTableFunc(StringInfo str, const TableFunc *node)
+{
+ WRITE_NODE_TYPE("TABLEFUNC");
+
+ WRITE_NODE_FIELD(ns_names);
+ WRITE_NODE_FIELD(ns_uris);
+ WRITE_NODE_FIELD(docexpr);
+ WRITE_NODE_FIELD(rowexpr);
+ WRITE_NODE_FIELD(colnames);
+ WRITE_NODE_FIELD(coltypes);
+ WRITE_NODE_FIELD(coltypmods);
+ WRITE_NODE_FIELD(colcollations);
+ WRITE_NODE_FIELD(colexprs);
+ WRITE_NODE_FIELD(coldefexprs);
+ WRITE_BITMAPSET_FIELD(notnulls);
+ WRITE_INT_FIELD(ordinalitycol);
+ WRITE_LOCATION_FIELD(location);
+}
+
static void
_outIntoClause(StringInfo str, const IntoClause *node)
{
WRITE_NODE_FIELD(functions);
WRITE_BOOL_FIELD(funcordinality);
break;
+ case RTE_TABLEFUNC:
+ WRITE_NODE_FIELD(tablefunc);
+ break;
case RTE_VALUES:
WRITE_NODE_FIELD(values_lists);
WRITE_NODE_FIELD(coltypes);
WRITE_LOCATION_FIELD(location);
}
+static void
+_outRangeTableFunc(StringInfo str, const RangeTableFunc *node)
+{
+ WRITE_NODE_TYPE("RANGETABLEFUNC");
+
+ WRITE_BOOL_FIELD(lateral);
+ WRITE_NODE_FIELD(docexpr);
+ WRITE_NODE_FIELD(rowexpr);
+ WRITE_NODE_FIELD(namespaces);
+ WRITE_NODE_FIELD(columns);
+ WRITE_NODE_FIELD(alias);
+ WRITE_LOCATION_FIELD(location);
+}
+
+static void
+_outRangeTableFuncCol(StringInfo str, const RangeTableFuncCol *node)
+{
+ WRITE_NODE_TYPE("RANGETABLEFUNCCOL");
+
+ WRITE_STRING_FIELD(colname);
+ WRITE_NODE_FIELD(typeName);
+ WRITE_BOOL_FIELD(for_ordinality);
+ WRITE_BOOL_FIELD(is_not_null);
+ WRITE_NODE_FIELD(colexpr);
+ WRITE_NODE_FIELD(coldefexpr);
+ WRITE_LOCATION_FIELD(location);
+}
+
static void
_outConstraint(StringInfo str, const Constraint *node)
{
case T_FunctionScan:
_outFunctionScan(str, obj);
break;
+ case T_TableFuncScan:
+ _outTableFuncScan(str, obj);
+ break;
case T_ValuesScan:
_outValuesScan(str, obj);
break;
case T_RangeVar:
_outRangeVar(str, obj);
break;
+ case T_TableFunc:
+ _outTableFunc(str, obj);
+ break;
case T_IntoClause:
_outIntoClause(str, obj);
break;
case T_RangeTableSample:
_outRangeTableSample(str, obj);
break;
+ case T_RangeTableFunc:
+ _outRangeTableFunc(str, obj);
+ break;
+ case T_RangeTableFuncCol:
+ _outRangeTableFuncCol(str, obj);
+ break;
case T_Constraint:
_outConstraint(str, obj);
break;
printf("%d\t%s\t[rangefunction]",
i, rte->eref->aliasname);
break;
+ case RTE_TABLEFUNC:
+ printf("%d\t%s\t[table function]",
+ i, rte->eref->aliasname);
+ break;
case RTE_VALUES:
printf("%d\t%s\t[values list]",
i, rte->eref->aliasname);
READ_DONE();
}
+/*
+ * _readTableFunc
+ */
+static TableFunc *
+_readTableFunc(void)
+{
+ READ_LOCALS(TableFunc);
+
+ READ_NODE_FIELD(ns_names);
+ READ_NODE_FIELD(ns_uris);
+ READ_NODE_FIELD(docexpr);
+ READ_NODE_FIELD(rowexpr);
+ READ_NODE_FIELD(colnames);
+ READ_NODE_FIELD(coltypes);
+ READ_NODE_FIELD(coltypmods);
+ READ_NODE_FIELD(colcollations);
+ READ_NODE_FIELD(colexprs);
+ READ_NODE_FIELD(coldefexprs);
+ READ_BITMAPSET_FIELD(notnulls);
+ READ_INT_FIELD(ordinalitycol);
+ READ_LOCATION_FIELD(location);
+
+ READ_DONE();
+}
+
static IntoClause *
_readIntoClause(void)
{
READ_NODE_FIELD(functions);
READ_BOOL_FIELD(funcordinality);
break;
+ case RTE_TABLEFUNC:
+ READ_NODE_FIELD(tablefunc);
+ break;
case RTE_VALUES:
READ_NODE_FIELD(values_lists);
READ_NODE_FIELD(coltypes);
READ_DONE();
}
+/*
+ * _readTableFuncScan
+ */
+static TableFuncScan *
+_readTableFuncScan(void)
+{
+ READ_LOCALS(TableFuncScan);
+
+ ReadCommonScan(&local_node->scan);
+
+ READ_NODE_FIELD(tablefunc);
+
+ READ_DONE();
+}
+
/*
* _readCteScan
*/
return_value = _readRangeVar();
else if (MATCH("INTOCLAUSE", 10))
return_value = _readIntoClause();
+ else if (MATCH("TABLEFUNC", 9))
+ return_value = _readTableFunc();
else if (MATCH("VAR", 3))
return_value = _readVar();
else if (MATCH("CONST", 5))
return_value = _readFunctionScan();
else if (MATCH("VALUESSCAN", 10))
return_value = _readValuesScan();
+ else if (MATCH("TABLEFUNCSCAN", 13))
+ return_value = _readTableFuncScan();
else if (MATCH("CTESCAN", 7))
return_value = _readCteScan();
else if (MATCH("WORKTABLESCAN", 13))
RangeTblEntry *rte);
static void set_values_pathlist(PlannerInfo *root, RelOptInfo *rel,
RangeTblEntry *rte);
+static void set_tablefunc_pathlist(PlannerInfo *root, RelOptInfo *rel,
+ RangeTblEntry *rte);
static void set_cte_pathlist(PlannerInfo *root, RelOptInfo *rel,
RangeTblEntry *rte);
static void set_worktable_pathlist(PlannerInfo *root, RelOptInfo *rel,
case RTE_FUNCTION:
set_function_size_estimates(root, rel);
break;
+ case RTE_TABLEFUNC:
+ set_tablefunc_size_estimates(root, rel);
+ break;
case RTE_VALUES:
set_values_size_estimates(root, rel);
break;
/* RangeFunction */
set_function_pathlist(root, rel, rte);
break;
+ case RTE_TABLEFUNC:
+ /* Table Function */
+ set_tablefunc_pathlist(root, rel, rte);
+ break;
case RTE_VALUES:
/* Values list */
set_values_pathlist(root, rel, rte);
return;
break;
+ case RTE_TABLEFUNC:
+ /* not parallel safe */
+ return;
+
case RTE_VALUES:
/* Check for parallel-restricted functions. */
if (!is_parallel_safe(root, (Node *) rte->values_lists))
add_path(rel, create_valuesscan_path(root, rel, required_outer));
}
+/*
+ * set_tablefunc_pathlist
+ * Build the (single) access path for a table func RTE
+ */
+static void
+set_tablefunc_pathlist(PlannerInfo *root, RelOptInfo *rel, RangeTblEntry *rte)
+{
+ Relids required_outer;
+
+ /*
+ * We don't support pushing join clauses into the quals of a tablefunc
+ * scan, but it could still have required parameterization due to LATERAL
+ * refs in the function expression.
+ */
+ required_outer = rel->lateral_relids;
+
+ /* Generate appropriate path */
+ add_path(rel, create_tablefuncscan_path(root, rel,
+ required_outer));
+}
+
/*
* set_cte_pathlist
* Build the (single) access path for a non-self-reference CTE RTE
case T_FunctionScan:
ptype = "FunctionScan";
break;
+ case T_TableFuncScan:
+ ptype = "TableFuncScan";
+ break;
case T_ValuesScan:
ptype = "ValuesScan";
break;
path->total_cost = startup_cost + run_cost;
}
+/*
+ * cost_tablefuncscan
+ * Determines and returns the cost of scanning a table function.
+ *
+ * 'baserel' is the relation to be scanned
+ * 'param_info' is the ParamPathInfo if this is a parameterized path, else NULL
+ */
+void
+cost_tablefuncscan(Path *path, PlannerInfo *root,
+ RelOptInfo *baserel, ParamPathInfo *param_info)
+{
+ Cost startup_cost = 0;
+ Cost run_cost = 0;
+ QualCost qpqual_cost;
+ Cost cpu_per_tuple;
+ RangeTblEntry *rte;
+ QualCost exprcost;
+
+ /* Should only be applied to base relations that are functions */
+ Assert(baserel->relid > 0);
+ rte = planner_rt_fetch(baserel->relid, root);
+ Assert(rte->rtekind == RTE_TABLEFUNC);
+
+ /* Mark the path with the correct row estimate */
+ if (param_info)
+ path->rows = param_info->ppi_rows;
+ else
+ path->rows = baserel->rows;
+
+ /*
+ * Estimate costs of executing the table func expression(s).
+ *
+ * XXX in principle we ought to charge tuplestore spill costs if the
+ * number of rows is large. However, given how phony our rowcount
+ * estimates for tablefuncs tend to be, there's not a lot of point in that
+ * refinement right now.
+ */
+ cost_qual_eval_node(&exprcost, (Node *) rte->tablefunc, root);
+
+ startup_cost += exprcost.startup + exprcost.per_tuple;
+
+ /* Add scanning CPU costs */
+ get_restriction_qual_cost(root, baserel, param_info, &qpqual_cost);
+
+ startup_cost += qpqual_cost.startup;
+ cpu_per_tuple = cpu_tuple_cost + qpqual_cost.per_tuple;
+ run_cost += cpu_per_tuple * baserel->tuples;
+
+ /* tlist eval costs are paid per output row, not per tuple scanned */
+ startup_cost += path->pathtarget->cost.startup;
+ run_cost += path->pathtarget->cost.per_tuple * path->rows;
+
+ path->startup_cost = startup_cost;
+ path->total_cost = startup_cost + run_cost;
+}
+
/*
* cost_valuesscan
* Determines and returns the cost of scanning a VALUES RTE.
set_baserel_size_estimates(root, rel);
}
+/*
+ * set_function_size_estimates
+ * Set the size estimates for a base relation that is a function call.
+ *
+ * The rel's targetlist and restrictinfo list must have been constructed
+ * already.
+ *
+ * We set the same fields as set_tablefunc_size_estimates.
+ */
+void
+set_tablefunc_size_estimates(PlannerInfo *root, RelOptInfo *rel)
+{
+ RangeTblEntry *rte;
+
+ /* Should only be applied to base relations that are functions */
+ Assert(rel->relid > 0);
+ rte = planner_rt_fetch(rel->relid, root);
+ Assert(rte->rtekind == RTE_TABLEFUNC);
+
+ rel->tuples = 100;
+
+ /* Now estimate number of output rows, etc */
+ set_baserel_size_estimates(root, rel);
+}
+
/*
* set_values_size_estimates
* Set the size estimates for a base relation that is a values list.
List *tlist, List *scan_clauses);
static ValuesScan *create_valuesscan_plan(PlannerInfo *root, Path *best_path,
List *tlist, List *scan_clauses);
+static TableFuncScan *create_tablefuncscan_plan(PlannerInfo *root, Path *best_path,
+ List *tlist, List *scan_clauses);
static CteScan *create_ctescan_plan(PlannerInfo *root, Path *best_path,
List *tlist, List *scan_clauses);
static WorkTableScan *create_worktablescan_plan(PlannerInfo *root, Path *best_path,
Index scanrelid, List *functions, bool funcordinality);
static ValuesScan *make_valuesscan(List *qptlist, List *qpqual,
Index scanrelid, List *values_lists);
+static TableFuncScan *make_tablefuncscan(List *qptlist, List *qpqual,
+ Index scanrelid, TableFunc *tablefunc);
static CteScan *make_ctescan(List *qptlist, List *qpqual,
Index scanrelid, int ctePlanId, int cteParam);
static WorkTableScan *make_worktablescan(List *qptlist, List *qpqual,
case T_TidScan:
case T_SubqueryScan:
case T_FunctionScan:
+ case T_TableFuncScan:
case T_ValuesScan:
case T_CteScan:
case T_WorkTableScan:
scan_clauses);
break;
+ case T_TableFuncScan:
+ plan = (Plan *) create_tablefuncscan_plan(root,
+ best_path,
+ tlist,
+ scan_clauses);
+ break;
+
case T_ValuesScan:
plan = (Plan *) create_valuesscan_plan(root,
best_path,
/*
* We can do this for real relation scans, subquery scans, function scans,
- * values scans, and CTE scans (but not for, eg, joins).
+ * tablefunc scans, values scans, and CTE scans (but not for, eg, joins).
*/
if (rel->rtekind != RTE_RELATION &&
rel->rtekind != RTE_SUBQUERY &&
rel->rtekind != RTE_FUNCTION &&
+ rel->rtekind != RTE_TABLEFUNC &&
rel->rtekind != RTE_VALUES &&
rel->rtekind != RTE_CTE)
return false;
return scan_plan;
}
+/*
+ * create_tablefuncscan_plan
+ * Returns a tablefuncscan plan for the base relation scanned by 'best_path'
+ * with restriction clauses 'scan_clauses' and targetlist 'tlist'.
+ */
+static TableFuncScan *
+create_tablefuncscan_plan(PlannerInfo *root, Path *best_path,
+ List *tlist, List *scan_clauses)
+{
+ TableFuncScan *scan_plan;
+ Index scan_relid = best_path->parent->relid;
+ RangeTblEntry *rte;
+ TableFunc *tablefunc;
+
+ /* it should be a function base rel... */
+ Assert(scan_relid > 0);
+ rte = planner_rt_fetch(scan_relid, root);
+ Assert(rte->rtekind == RTE_TABLEFUNC);
+ tablefunc = rte->tablefunc;
+
+ /* Sort clauses into best execution order */
+ scan_clauses = order_qual_clauses(root, scan_clauses);
+
+ /* Reduce RestrictInfo list to bare expressions; ignore pseudoconstants */
+ scan_clauses = extract_actual_clauses(scan_clauses, false);
+
+ /* Replace any outer-relation variables with nestloop params */
+ if (best_path->param_info)
+ {
+ scan_clauses = (List *)
+ replace_nestloop_params(root, (Node *) scan_clauses);
+ /* The function expressions could contain nestloop params, too */
+ tablefunc = (TableFunc *) replace_nestloop_params(root, (Node *) tablefunc);
+ }
+
+ scan_plan = make_tablefuncscan(tlist, scan_clauses, scan_relid,
+ tablefunc);
+
+ copy_generic_path_info(&scan_plan->scan.plan, best_path);
+
+ return scan_plan;
+}
+
/*
* create_valuesscan_plan
* Returns a valuesscan plan for the base relation scanned by 'best_path'
return node;
}
+static TableFuncScan *
+make_tablefuncscan(List *qptlist,
+ List *qpqual,
+ Index scanrelid,
+ TableFunc *tablefunc)
+{
+ TableFuncScan *node = makeNode(TableFuncScan);
+ Plan *plan = &node->scan.plan;
+
+ plan->targetlist = qptlist;
+ plan->qual = qpqual;
+ plan->lefttree = NULL;
+ plan->righttree = NULL;
+ node->scan.scanrelid = scanrelid;
+ node->tablefunc = tablefunc;
+
+ return node;
+}
+
static ValuesScan *
make_valuesscan(List *qptlist,
List *qpqual,
vars = pull_vars_of_level((Node *) rte->subquery, 1);
else if (rte->rtekind == RTE_FUNCTION)
vars = pull_vars_of_level((Node *) rte->functions, 0);
+ else if (rte->rtekind == RTE_TABLEFUNC)
+ vars = pull_vars_of_level((Node *) rte->tablefunc, 0);
else if (rte->rtekind == RTE_VALUES)
vars = pull_vars_of_level((Node *) rte->values_lists, 0);
else
/* Expression kind codes for preprocess_expression */
-#define EXPRKIND_QUAL 0
-#define EXPRKIND_TARGET 1
-#define EXPRKIND_RTFUNC 2
-#define EXPRKIND_RTFUNC_LATERAL 3
-#define EXPRKIND_VALUES 4
-#define EXPRKIND_VALUES_LATERAL 5
-#define EXPRKIND_LIMIT 6
-#define EXPRKIND_APPINFO 7
-#define EXPRKIND_PHV 8
-#define EXPRKIND_TABLESAMPLE 9
-#define EXPRKIND_ARBITER_ELEM 10
+#define EXPRKIND_QUAL 0
+#define EXPRKIND_TARGET 1
+#define EXPRKIND_RTFUNC 2
+#define EXPRKIND_RTFUNC_LATERAL 3
+#define EXPRKIND_VALUES 4
+#define EXPRKIND_VALUES_LATERAL 5
+#define EXPRKIND_LIMIT 6
+#define EXPRKIND_APPINFO 7
+#define EXPRKIND_PHV 8
+#define EXPRKIND_TABLESAMPLE 9
+#define EXPRKIND_ARBITER_ELEM 10
+#define EXPRKIND_TABLEFUNC 11
+#define EXPRKIND_TABLEFUNC_LATERAL 12
/* Passthrough data for standard_qp_callback */
typedef struct
{
/* Preprocess the function expression(s) fully */
kind = rte->lateral ? EXPRKIND_RTFUNC_LATERAL : EXPRKIND_RTFUNC;
- rte->functions = (List *) preprocess_expression(root, (Node *) rte->functions, kind);
+ rte->functions = (List *)
+ preprocess_expression(root, (Node *) rte->functions, kind);
+ }
+ else if (rte->rtekind == RTE_TABLEFUNC)
+ {
+ /* Preprocess the function expression(s) fully */
+ kind = rte->lateral ? EXPRKIND_TABLEFUNC_LATERAL : EXPRKIND_TABLEFUNC;
+ rte->tablefunc = (TableFunc *)
+ preprocess_expression(root, (Node *) rte->tablefunc, kind);
}
else if (rte->rtekind == RTE_VALUES)
{
if (root->hasJoinRTEs &&
!(kind == EXPRKIND_RTFUNC ||
kind == EXPRKIND_VALUES ||
- kind == EXPRKIND_TABLESAMPLE))
+ kind == EXPRKIND_TABLESAMPLE ||
+ kind == EXPRKIND_TABLEFUNC))
expr = flatten_join_alias_vars(root, expr);
/*
newrte->subquery = NULL;
newrte->joinaliasvars = NIL;
newrte->functions = NIL;
+ newrte->tablefunc = NULL;
newrte->values_lists = NIL;
newrte->coltypes = NIL;
newrte->coltypmods = NIL;
fix_scan_list(root, splan->functions, rtoffset);
}
break;
+ case T_TableFuncScan:
+ {
+ TableFuncScan *splan = (TableFuncScan *) plan;
+
+ splan->scan.scanrelid += rtoffset;
+ splan->scan.plan.targetlist =
+ fix_scan_list(root, splan->scan.plan.targetlist, rtoffset);
+ splan->scan.plan.qual =
+ fix_scan_list(root, splan->scan.plan.qual, rtoffset);
+ splan->tablefunc = (TableFunc *)
+ fix_scan_expr(root, (Node *) splan->tablefunc, rtoffset);
+ }
+ break;
case T_ValuesScan:
{
ValuesScan *splan = (ValuesScan *) plan;
}
break;
+ case T_TableFuncScan:
+ finalize_primnode((Node *) ((TableFuncScan *) plan)->tablefunc,
+ &context);
+ context.paramids = bms_add_members(context.paramids, scan_params);
+ break;
+
case T_ValuesScan:
finalize_primnode((Node *) ((ValuesScan *) plan)->values_lists,
&context);
case RTE_SUBQUERY:
case RTE_FUNCTION:
case RTE_VALUES:
+ case RTE_TABLEFUNC:
child_rte->lateral = true;
break;
case RTE_JOIN:
pullup_replace_vars((Node *) rte->functions,
context);
break;
+ case RTE_TABLEFUNC:
+ rte->tablefunc = (TableFunc *)
+ pullup_replace_vars((Node *) rte->tablefunc,
+ context);
+ break;
case RTE_VALUES:
rte->values_lists = (List *)
pullup_replace_vars((Node *) rte->values_lists,
return pathnode;
}
+/*
+ * create_tablefuncscan_path
+ * Creates a path corresponding to a sequential scan of a table function,
+ * returning the pathnode.
+ */
+Path *
+create_tablefuncscan_path(PlannerInfo *root, RelOptInfo *rel,
+ Relids required_outer)
+{
+ Path *pathnode = makeNode(Path);
+
+ pathnode->pathtype = T_TableFuncScan;
+ pathnode->parent = rel;
+ pathnode->pathtarget = rel->reltarget;
+ pathnode->param_info = get_baserel_parampathinfo(root, rel,
+ required_outer);
+ pathnode->parallel_aware = false;
+ pathnode->parallel_safe = rel->consider_parallel;
+ pathnode->parallel_workers = 0;
+ pathnode->pathkeys = NIL; /* result is always unordered */
+
+ cost_tablefuncscan(pathnode, root, rel, pathnode->param_info);
+
+ return pathnode;
+}
+
/*
* create_valuesscan_path
* Creates a path corresponding to a scan of a VALUES list,
* dropped cols.
*
* We also support building a "physical" tlist for subqueries, functions,
- * values lists, and CTEs, since the same optimization can occur in
- * SubqueryScan, FunctionScan, ValuesScan, CteScan, and WorkTableScan nodes.
+ * values lists, table expressions and CTEs, since the same optimization can
+ * occur in SubqueryScan, FunctionScan, ValuesScan, CteScan, TableFunc
+ * and WorkTableScan nodes.
*/
List *
build_physical_tlist(PlannerInfo *root, RelOptInfo *rel)
break;
case RTE_FUNCTION:
+ case RTE_TABLEFUNC:
case RTE_VALUES:
case RTE_CTE:
/* Not all of these can have dropped cols, but share code anyway */
break;
case RTE_SUBQUERY:
case RTE_FUNCTION:
+ case RTE_TABLEFUNC:
case RTE_VALUES:
case RTE_CTE:
/*
- * Subquery, function, or values list --- set up attr range and
- * arrays
+ * Subquery, function, tablefunc, or values list --- set up attr
+ * range and arrays
*
* Note: 0 is included in range to support whole-row Vars
*/
LCS_asString(lc->strength)),
parser_errposition(pstate, thisrel->location)));
break;
+ case RTE_TABLEFUNC:
+ ereport(ERROR,
+ (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+ /*------
+ translator: %s is a SQL row locking clause such as FOR UPDATE */
+ errmsg("%s cannot be applied to a table function",
+ LCS_asString(lc->strength)),
+ parser_errposition(pstate, thisrel->location)));
+ break;
case RTE_VALUES:
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
%type <defelt> def_elem reloption_elem old_aggr_elem operator_def_elem
%type <node> def_arg columnElem where_clause where_or_current_clause
a_expr b_expr c_expr AexprConst indirection_el opt_slice_bound
- columnref in_expr having_clause func_table array_expr
+ columnref in_expr having_clause func_table xmltable array_expr
ExclusionWhereClause
%type <list> rowsfrom_item rowsfrom_list opt_col_def_list
%type <boolean> opt_ordinality
%type <node> xmlexists_argument
%type <ival> document_or_content
%type <boolean> xml_whitespace_option
+%type <list> xmltable_column_list xmltable_column_option_list
+%type <node> xmltable_column_el
+%type <defelt> xmltable_column_option_el
+%type <list> xml_namespace_list
+%type <target> xml_namespace_el
%type <node> func_application func_expr_common_subexpr
%type <node> func_expr func_expr_windowless
CACHE CALLED CASCADE CASCADED CASE CAST CATALOG_P CHAIN CHAR_P
CHARACTER CHARACTERISTICS CHECK CHECKPOINT CLASS CLOSE
- CLUSTER COALESCE COLLATE COLLATION COLUMN COMMENT COMMENTS COMMIT
+ CLUSTER COALESCE COLLATE COLLATION COLUMN COLUMNS COMMENT COMMENTS COMMIT
COMMITTED CONCURRENTLY CONFIGURATION CONFLICT CONNECTION CONSTRAINT
CONSTRAINTS CONTENT_P CONTINUE_P CONVERSION_P COPY COST CREATE
CROSS CSV CUBE CURRENT_P
WHEN WHERE WHITESPACE_P WINDOW WITH WITHIN WITHOUT WORK WRAPPER WRITE
- XML_P XMLATTRIBUTES XMLCONCAT XMLELEMENT XMLEXISTS XMLFOREST XMLPARSE
- XMLPI XMLROOT XMLSERIALIZE
+ XML_P XMLATTRIBUTES XMLCONCAT XMLELEMENT XMLEXISTS XMLFOREST XMLNAMESPACES
+ XMLPARSE XMLPI XMLROOT XMLSERIALIZE XMLTABLE
YEAR_P YES_P
n->coldeflist = lsecond($3);
$$ = (Node *) n;
}
+ | xmltable opt_alias_clause
+ {
+ RangeTableFunc *n = (RangeTableFunc *) $1;
+ n->alias = $2;
+ $$ = (Node *) n;
+ }
+ | LATERAL_P xmltable opt_alias_clause
+ {
+ RangeTableFunc *n = (RangeTableFunc *) $2;
+ n->lateral = true;
+ n->alias = $3;
+ $$ = (Node *) n;
+ }
| select_with_parens opt_alias_clause
{
RangeSubselect *n = makeNode(RangeSubselect);
}
;
+/*
+ * XMLTABLE
+ */
+xmltable:
+ XMLTABLE '(' c_expr xmlexists_argument COLUMNS xmltable_column_list ')'
+ {
+ RangeTableFunc *n = makeNode(RangeTableFunc);
+ n->rowexpr = $3;
+ n->docexpr = $4;
+ n->columns = $6;
+ n->namespaces = NIL;
+ n->location = @1;
+ $$ = (Node *)n;
+ }
+ | XMLTABLE '(' XMLNAMESPACES '(' xml_namespace_list ')' ','
+ c_expr xmlexists_argument COLUMNS xmltable_column_list ')'
+ {
+ RangeTableFunc *n = makeNode(RangeTableFunc);
+ n->rowexpr = $8;
+ n->docexpr = $9;
+ n->columns = $11;
+ n->namespaces = $5;
+ n->location = @1;
+ $$ = (Node *)n;
+ }
+ ;
+
+xmltable_column_list: xmltable_column_el { $$ = list_make1($1); }
+ | xmltable_column_list ',' xmltable_column_el { $$ = lappend($1, $3); }
+ ;
+
+xmltable_column_el:
+ ColId Typename
+ {
+ RangeTableFuncCol *fc = makeNode(RangeTableFuncCol);
+
+ fc->colname = $1;
+ fc->for_ordinality = false;
+ fc->typeName = $2;
+ fc->is_not_null = false;
+ fc->colexpr = NULL;
+ fc->coldefexpr = NULL;
+ fc->location = @1;
+
+ $$ = (Node *) fc;
+ }
+ | ColId Typename xmltable_column_option_list
+ {
+ RangeTableFuncCol *fc = makeNode(RangeTableFuncCol);
+ ListCell *option;
+ bool nullability_seen = false;
+
+ fc->colname = $1;
+ fc->typeName = $2;
+ fc->for_ordinality = false;
+ fc->is_not_null = false;
+ fc->colexpr = NULL;
+ fc->coldefexpr = NULL;
+ fc->location = @1;
+
+ foreach(option, $3)
+ {
+ DefElem *defel = (DefElem *) lfirst(option);
+
+ if (strcmp(defel->defname, "default") == 0)
+ {
+ if (fc->coldefexpr != NULL)
+ ereport(ERROR,
+ (errcode(ERRCODE_SYNTAX_ERROR),
+ errmsg("only one DEFAULT value is allowed"),
+ parser_errposition(defel->location)));
+ fc->coldefexpr = defel->arg;
+ }
+ else if (strcmp(defel->defname, "path") == 0)
+ {
+ if (fc->colexpr != NULL)
+ ereport(ERROR,
+ (errcode(ERRCODE_SYNTAX_ERROR),
+ errmsg("only one PATH value per column is allowed"),
+ parser_errposition(defel->location)));
+ fc->colexpr = defel->arg;
+ }
+ else if (strcmp(defel->defname, "is_not_null") == 0)
+ {
+ if (nullability_seen)
+ ereport(ERROR,
+ (errcode(ERRCODE_SYNTAX_ERROR),
+ errmsg("conflicting or redundant NULL / NOT NULL declarations for column \"%s\"", fc->colname),
+ parser_errposition(defel->location)));
+ fc->is_not_null = intVal(defel->arg);
+ nullability_seen = true;
+ }
+ else
+ {
+ ereport(ERROR,
+ (errcode(ERRCODE_SYNTAX_ERROR),
+ errmsg("unrecognized column option \"%s\"",
+ defel->defname),
+ parser_errposition(defel->location)));
+ }
+ }
+ $$ = (Node *) fc;
+ }
+ | ColId FOR ORDINALITY
+ {
+ RangeTableFuncCol *fc = makeNode(RangeTableFuncCol);
+
+ fc->colname = $1;
+ fc->for_ordinality = true;
+ /* other fields are ignored, initialized by makeNode */
+ fc->location = @1;
+
+ $$ = (Node *) fc;
+ }
+ ;
+
+xmltable_column_option_list:
+ xmltable_column_option_el
+ { $$ = list_make1($1); }
+ | xmltable_column_option_list xmltable_column_option_el
+ { $$ = lappend($1, $2); }
+ ;
+
+xmltable_column_option_el:
+ IDENT b_expr
+ { $$ = makeDefElem($1, $2, @1); }
+ | DEFAULT b_expr
+ { $$ = makeDefElem("default", $2, @1); }
+ | NOT NULL_P
+ { $$ = makeDefElem("is_not_null", (Node *) makeInteger(true), @1); }
+ | NULL_P
+ { $$ = makeDefElem("is_not_null", (Node *) makeInteger(false), @1); }
+ ;
+
+xml_namespace_list:
+ xml_namespace_el
+ { $$ = list_make1($1); }
+ | xml_namespace_list ',' xml_namespace_el
+ { $$ = lappend($1, $3); }
+ ;
+
+xml_namespace_el:
+ b_expr AS ColLabel
+ {
+ $$ = makeNode(ResTarget);
+ $$->name = $3;
+ $$->indirection = NIL;
+ $$->val = $1;
+ $$->location = @1;
+ }
+ | DEFAULT b_expr
+ {
+ $$ = makeNode(ResTarget);
+ $$->name = NULL;
+ $$->indirection = NIL;
+ $$->val = $2;
+ $$->location = @1;
+ }
+ ;
+
/*****************************************************************************
*
* Type syntax
| CLASS
| CLOSE
| CLUSTER
+ | COLUMNS
| COMMENT
| COMMENTS
| COMMIT
| XMLELEMENT
| XMLEXISTS
| XMLFOREST
+ | XMLNAMESPACES
| XMLPARSE
| XMLPI
| XMLROOT
| XMLSERIALIZE
+ | XMLTABLE
;
/* Type/function identifier --- keywords that can be type or function names.
#include "catalog/catalog.h"
#include "catalog/heap.h"
#include "catalog/pg_am.h"
+#include "catalog/pg_collation.h"
#include "catalog/pg_constraint_fn.h"
#include "catalog/pg_type.h"
#include "commands/defrem.h"
RangeSubselect *r);
static RangeTblEntry *transformRangeFunction(ParseState *pstate,
RangeFunction *r);
+static RangeTblEntry *transformRangeTableFunc(ParseState *pstate,
+ RangeTableFunc *t);
static TableSampleClause *transformRangeTableSample(ParseState *pstate,
RangeTableSample *rts);
static Node *transformFromClauseItem(ParseState *pstate, Node *n,
return rte;
}
+/*
+ * transformRangeTableFunc -
+ * Transform a raw RangeTableFunc into TableFunc.
+ *
+ * Transform the namespace clauses, the document-generating expression, the
+ * row-generating expression, the column-generating expressions, and the
+ * default value expressions.
+ */
+static RangeTblEntry *
+transformRangeTableFunc(ParseState *pstate, RangeTableFunc *rtf)
+{
+ TableFunc *tf = makeNode(TableFunc);
+ const char *constructName;
+ Oid docType;
+ RangeTblEntry *rte;
+ bool is_lateral;
+ ListCell *col;
+ char **names;
+ int colno;
+
+ /* Currently only XMLTABLE is supported */
+ constructName = "XMLTABLE";
+ docType = XMLOID;
+
+ /*
+ * We make lateral_only names of this level visible, whether or not the
+ * RangeTableFunc is explicitly marked LATERAL. This is needed for SQL
+ * spec compliance and seems useful on convenience grounds for all
+ * functions in FROM.
+ *
+ * (LATERAL can't nest within a single pstate level, so we don't need
+ * save/restore logic here.)
+ */
+ Assert(!pstate->p_lateral_active);
+ pstate->p_lateral_active = true;
+
+ /* Transform and apply typecast to the row-generating expression ... */
+ Assert(rtf->rowexpr != NULL);
+ tf->rowexpr = coerce_to_specific_type(pstate,
+ transformExpr(pstate, rtf->rowexpr, EXPR_KIND_FROM_FUNCTION),
+ TEXTOID,
+ constructName);
+ assign_expr_collations(pstate, tf->rowexpr);
+
+ /* ... and to the document itself */
+ Assert(rtf->docexpr != NULL);
+ tf->docexpr = coerce_to_specific_type(pstate,
+ transformExpr(pstate, rtf->docexpr, EXPR_KIND_FROM_FUNCTION),
+ docType,
+ constructName);
+ assign_expr_collations(pstate, tf->docexpr);
+
+ /* undef ordinality column number */
+ tf->ordinalitycol = -1;
+
+
+ names = palloc(sizeof(char *) * list_length(rtf->columns));
+
+ colno = 0;
+ foreach(col, rtf->columns)
+ {
+ RangeTableFuncCol *rawc = (RangeTableFuncCol *) lfirst(col);
+ Oid typid;
+ int32 typmod;
+ Node *colexpr;
+ Node *coldefexpr;
+ int j;
+
+ tf->colnames = lappend(tf->colnames,
+ makeString(pstrdup(rawc->colname)));
+
+ /*
+ * Determine the type and typmod for the new column. FOR
+ * ORDINALITY columns are INTEGER per spec; the others are
+ * user-specified.
+ */
+ if (rawc->for_ordinality)
+ {
+ if (tf->ordinalitycol != -1)
+ ereport(ERROR,
+ (errcode(ERRCODE_SYNTAX_ERROR),
+ errmsg("only one FOR ORDINALITY column is allowed"),
+ parser_errposition(pstate, rawc->location)));
+
+ typid = INT4OID;
+ typmod = -1;
+ tf->ordinalitycol = colno;
+ }
+ else
+ {
+ if (rawc->typeName->setof)
+ ereport(ERROR,
+ (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
+ errmsg("column \"%s\" cannot be declared SETOF",
+ rawc->colname),
+ parser_errposition(pstate, rawc->location)));
+
+ typenameTypeIdAndMod(pstate, rawc->typeName,
+ &typid, &typmod);
+ }
+
+ tf->coltypes = lappend_oid(tf->coltypes, typid);
+ tf->coltypmods = lappend_int(tf->coltypmods, typmod);
+ tf->colcollations = lappend_oid(tf->colcollations,
+ type_is_collatable(typid) ? DEFAULT_COLLATION_OID : InvalidOid);
+
+ /* Transform the PATH and DEFAULT expressions */
+ if (rawc->colexpr)
+ {
+ colexpr = coerce_to_specific_type(pstate,
+ transformExpr(pstate, rawc->colexpr,
+ EXPR_KIND_FROM_FUNCTION),
+ TEXTOID,
+ constructName);
+ assign_expr_collations(pstate, colexpr);
+ }
+ else
+ colexpr = NULL;
+
+ if (rawc->coldefexpr)
+ {
+ coldefexpr = coerce_to_specific_type_typmod(pstate,
+ transformExpr(pstate, rawc->coldefexpr,
+ EXPR_KIND_FROM_FUNCTION),
+ typid, typmod,
+ constructName);
+ assign_expr_collations(pstate, coldefexpr);
+ }
+ else
+ coldefexpr = NULL;
+
+ tf->colexprs = lappend(tf->colexprs, colexpr);
+ tf->coldefexprs = lappend(tf->coldefexprs, coldefexpr);
+
+ if (rawc->is_not_null)
+ tf->notnulls = bms_add_member(tf->notnulls, colno);
+
+ /* make sure column names are unique */
+ for (j = 0; j < colno; j++)
+ if (strcmp(names[j], rawc->colname) == 0)
+ ereport(ERROR,
+ (errcode(ERRCODE_SYNTAX_ERROR),
+ errmsg("column name \"%s\" is not unique",
+ rawc->colname),
+ parser_errposition(pstate, rawc->location)));
+ names[colno] = rawc->colname;
+
+ colno++;
+ }
+ pfree(names);
+
+ /* Namespaces, if any, also need to be transformed */
+ if (rtf->namespaces != NIL)
+ {
+ ListCell *ns;
+ ListCell *lc2;
+ List *ns_uris = NIL;
+ List *ns_names = NIL;
+ bool default_ns_seen = false;
+
+ foreach(ns, rtf->namespaces)
+ {
+ ResTarget *r = (ResTarget *) lfirst(ns);
+ Node *ns_uri;
+
+ Assert(IsA(r, ResTarget));
+ ns_uri = transformExpr(pstate, r->val, EXPR_KIND_FROM_FUNCTION);
+ ns_uri = coerce_to_specific_type(pstate, ns_uri,
+ TEXTOID, constructName);
+ assign_expr_collations(pstate, ns_uri);
+ ns_uris = lappend(ns_uris, ns_uri);
+
+ /* Verify consistency of name list: no dupes, only one DEFAULT */
+ if (r->name != NULL)
+ {
+ foreach(lc2, ns_names)
+ {
+ char *name = strVal(lfirst(lc2));
+
+ if (name == NULL)
+ continue;
+ if (strcmp(name, r->name) == 0)
+ ereport(ERROR,
+ (errcode(ERRCODE_SYNTAX_ERROR),
+ errmsg("namespace name \"%s\" is not unique",
+ name),
+ parser_errposition(pstate, r->location)));
+ }
+ }
+ else
+ {
+ if (default_ns_seen)
+ ereport(ERROR,
+ (errcode(ERRCODE_SYNTAX_ERROR),
+ errmsg("only one default namespace is allowed"),
+ parser_errposition(pstate, r->location)));
+ default_ns_seen = true;
+ }
+
+ /* Note the string may be NULL */
+ ns_names = lappend(ns_names, makeString(r->name));
+ }
+
+ tf->ns_uris = ns_uris;
+ tf->ns_names = ns_names;
+ }
+
+ tf->location = rtf->location;
+
+ pstate->p_lateral_active = false;
+
+ /*
+ * Mark the RTE as LATERAL if the user said LATERAL explicitly, or if
+ * there are any lateral cross-references in it.
+ */
+ is_lateral = rtf->lateral || contain_vars_of_level((Node *) tf, 0);
+
+ rte = addRangeTableEntryForTableFunc(pstate,
+ tf, rtf->alias, is_lateral, true);
+
+ return rte;
+}
+
/*
* transformRangeTableSample --- transform a TABLESAMPLE clause
*
return tablesample;
}
-
/*
* transformFromClauseItem -
* Transform a FROM-clause item, adding any required entries to the
rtr->rtindex = rtindex;
return (Node *) rtr;
}
+ else if (IsA(n, RangeTableFunc))
+ {
+ /* table function is like a plain relation */
+ RangeTblRef *rtr;
+ RangeTblEntry *rte;
+ int rtindex;
+
+ rte = transformRangeTableFunc(pstate, (RangeTableFunc *) n);
+ /* assume new rte is at end */
+ rtindex = list_length(pstate->p_rtable);
+ Assert(rte == rt_fetch(rtindex, pstate->p_rtable));
+ *top_rte = rte;
+ *top_rti = rtindex;
+ *namespace = list_make1(makeDefaultNSItem(rte));
+ rtr = makeNode(RangeTblRef);
+ rtr->rtindex = rtindex;
+ return (Node *) rtr;
+ }
else if (IsA(n, RangeTableSample))
{
/* TABLESAMPLE clause (wrapping some other valid FROM node) */
}
/*
- * coerce_to_specific_type()
- * Coerce an argument of a construct that requires a specific data type.
- * Also check that input is not a set.
+ * coerce_to_specific_type_typmod()
+ * Coerce an argument of a construct that requires a specific data type,
+ * with a specific typmod. Also check that input is not a set.
*
* Returns the possibly-transformed node tree.
*
* processing is wanted.
*/
Node *
-coerce_to_specific_type(ParseState *pstate, Node *node,
- Oid targetTypeId,
- const char *constructName)
+coerce_to_specific_type_typmod(ParseState *pstate, Node *node,
+ Oid targetTypeId, int32 targetTypmod,
+ const char *constructName)
{
Oid inputTypeId = exprType(node);
Node *newnode;
newnode = coerce_to_target_type(pstate, node, inputTypeId,
- targetTypeId, -1,
+ targetTypeId, targetTypmod,
COERCION_ASSIGNMENT,
COERCE_IMPLICIT_CAST,
-1);
return node;
}
+/*
+ * coerce_to_specific_type()
+ * Coerce an argument of a construct that requires a specific data type.
+ * Also check that input is not a set.
+ *
+ * Returns the possibly-transformed node tree.
+ *
+ * As with coerce_type, pstate may be NULL if no special unknown-Param
+ * processing is wanted.
+ */
+Node *
+coerce_to_specific_type(ParseState *pstate, Node *node,
+ Oid targetTypeId,
+ const char *constructName)
+{
+ return coerce_to_specific_type_typmod(pstate, node,
+ targetTypeId, -1,
+ constructName);
+}
/*
* parser_coercion_errposition - report coercion error location, if possible
return rte;
}
+/*
+ * Add an entry for a table function to the pstate's range table (p_rtable).
+ *
+ * This is much like addRangeTableEntry() except that it makes a tablefunc RTE.
+ */
+RangeTblEntry *
+addRangeTableEntryForTableFunc(ParseState *pstate,
+ TableFunc *tf,
+ Alias *alias,
+ bool lateral,
+ bool inFromCl)
+{
+ RangeTblEntry *rte = makeNode(RangeTblEntry);
+ char *refname = alias ? alias->aliasname : pstrdup("xmltable");
+ Alias *eref;
+ int numaliases;
+
+ Assert(pstate != NULL);
+
+ rte->rtekind = RTE_TABLEFUNC;
+ rte->relid = InvalidOid;
+ rte->subquery = NULL;
+ rte->tablefunc = tf;
+ rte->coltypes = tf->coltypes;
+ rte->coltypmods = tf->coltypmods;
+ rte->colcollations = tf->colcollations;
+ rte->alias = alias;
+
+ eref = alias ? copyObject(alias) : makeAlias(refname, NIL);
+ numaliases = list_length(eref->colnames);
+
+ /* fill in any unspecified alias columns */
+ if (numaliases < list_length(tf->colnames))
+ eref->colnames = list_concat(eref->colnames,
+ list_copy_tail(tf->colnames, numaliases));
+
+ rte->eref = eref;
+
+ /*
+ * Set flags and access permissions.
+ *
+ * Tablefuncs are never checked for access rights (at least, not by the
+ * RTE permissions mechanism).
+ */
+ rte->lateral = lateral;
+ rte->inh = false; /* never true for tablefunc RTEs */
+ rte->inFromCl = inFromCl;
+
+ rte->requiredPerms = 0;
+ rte->checkAsUser = InvalidOid;
+ rte->selectedCols = NULL;
+ rte->insertedCols = NULL;
+ rte->updatedCols = NULL;
+
+ /*
+ * Add completed RTE to pstate's range table list, but not to join list
+ * nor namespace --- caller must do that if appropriate.
+ */
+ pstate->p_rtable = lappend(pstate->p_rtable, rte);
+
+ return rte;
+}
+
/*
* Add an entry for a VALUES list to the pstate's range table (p_rtable).
*
}
}
break;
+ case RTE_TABLEFUNC:
case RTE_VALUES:
case RTE_CTE:
{
- /* Values or CTE RTE */
+ /* Tablefunc, Values or CTE RTE */
ListCell *aliasp_item = list_head(rte->eref->colnames);
ListCell *lct;
ListCell *lcm;
*varcollid = exprCollation(aliasvar);
}
break;
+ case RTE_TABLEFUNC:
case RTE_VALUES:
case RTE_CTE:
{
- /* VALUES or CTE RTE --- get type info from lists in the RTE */
+ /*
+ * tablefunc, VALUES or CTE RTE --- get type info from lists
+ * in the RTE
+ */
Assert(attnum > 0 && attnum <= list_length(rte->coltypes));
*vartype = list_nth_oid(rte->coltypes, attnum - 1);
*vartypmod = list_nth_int(rte->coltypmods, attnum - 1);
}
break;
case RTE_SUBQUERY:
+ case RTE_TABLEFUNC:
case RTE_VALUES:
case RTE_CTE:
- /* Subselect, Values, CTE RTEs never have dropped columns */
+
+ /*
+ * Subselect, Table Functions, Values, CTE RTEs never have dropped
+ * columns
+ */
result = false;
break;
case RTE_JOIN:
break;
case RTE_FUNCTION:
case RTE_VALUES:
+ case RTE_TABLEFUNC:
/* not a simple relation, leave it unmarked */
break;
case RTE_CTE:
* its result columns as RECORD, which is not allowed.
*/
break;
+ case RTE_TABLEFUNC:
+
+ /*
+ * Table function cannot have columns with RECORD type.
+ */
+ break;
case RTE_CTE:
/* CTE reference: examine subquery's output expr */
if (!rte->self_reference)
sub_action->hasSubLinks =
checkExprHasSubLink((Node *) rte->functions);
break;
+ case RTE_TABLEFUNC:
+ sub_action->hasSubLinks =
+ checkExprHasSubLink((Node *) rte->tablefunc);
+ break;
case RTE_VALUES:
sub_action->hasSubLinks =
checkExprHasSubLink((Node *) rte->values_lists);
static void get_const_collation(Const *constval, deparse_context *context);
static void simple_quote_literal(StringInfo buf, const char *val);
static void get_sublink_expr(SubLink *sublink, deparse_context *context);
+static void get_tablefunc(TableFunc *tf, deparse_context *context,
+ bool showimplicit);
static void get_from_clause(Query *query, const char *prefix,
deparse_context *context);
static void get_from_clause_item(Node *jtnode, Query *query,
* are different from the underlying "real" names. For a function RTE,
* always emit a complete column alias list; this is to protect against
* possible instability of the default column names (eg, from altering
- * parameter names). For other RTE types, print if we changed anything OR
- * if there were user-written column aliases (since the latter would be
- * part of the underlying "reality").
+ * parameter names). For tablefunc RTEs, we never print aliases, because
+ * the column names are part of the clause itself. For other RTE types,
+ * print if we changed anything OR if there were user-written column
+ * aliases (since the latter would be part of the underlying "reality").
*/
if (rte->rtekind == RTE_RELATION)
colinfo->printaliases = changed_any;
else if (rte->rtekind == RTE_FUNCTION)
colinfo->printaliases = true;
+ else if (rte->rtekind == RTE_TABLEFUNC)
+ colinfo->printaliases = false;
else if (rte->alias && rte->alias->colnames != NIL)
colinfo->printaliases = true;
else
/* else fall through to inspect the expression */
break;
case RTE_FUNCTION:
+ case RTE_TABLEFUNC:
/*
* We couldn't get here unless a function is declared with one of
}
break;
+ case T_TableFunc:
+ get_tablefunc((TableFunc *) node, context, showimplicit);
+ break;
+
default:
elog(ERROR, "unrecognized node type: %d", (int) nodeTag(node));
break;
}
+/* ----------
+ * get_tablefunc - Parse back a table function
+ * ----------
+ */
+static void
+get_tablefunc(TableFunc *tf, deparse_context *context, bool showimplicit)
+{
+ StringInfo buf = context->buf;
+
+ /* XMLTABLE is the only existing implementation. */
+
+ appendStringInfoString(buf, "XMLTABLE(");
+
+ if (tf->ns_uris != NIL)
+ {
+ ListCell *lc1,
+ *lc2;
+ bool first = true;
+
+ appendStringInfoString(buf, "XMLNAMESPACES (");
+ forboth(lc1, tf->ns_uris, lc2, tf->ns_names)
+ {
+ Node *expr = (Node *) lfirst(lc1);
+ char *name = strVal(lfirst(lc2));
+
+ if (!first)
+ appendStringInfoString(buf, ", ");
+ else
+ first = false;
+
+ if (name != NULL)
+ {
+ get_rule_expr(expr, context, showimplicit);
+ appendStringInfo(buf, " AS %s", name);
+ }
+ else
+ {
+ appendStringInfoString(buf, "DEFAULT ");
+ get_rule_expr(expr, context, showimplicit);
+ }
+ }
+ appendStringInfoString(buf, "), ");
+ }
+
+ appendStringInfoChar(buf, '(');
+ get_rule_expr((Node *) tf->rowexpr, context, showimplicit);
+ appendStringInfoString(buf, ") PASSING (");
+ get_rule_expr((Node *) tf->docexpr, context, showimplicit);
+ appendStringInfoChar(buf, ')');
+
+ if (tf->colexprs != NIL)
+ {
+ ListCell *l1;
+ ListCell *l2;
+ ListCell *l3;
+ ListCell *l4;
+ ListCell *l5;
+ int colnum = 0;
+
+ l2 = list_head(tf->coltypes);
+ l3 = list_head(tf->coltypmods);
+ l4 = list_head(tf->colexprs);
+ l5 = list_head(tf->coldefexprs);
+
+ appendStringInfoString(buf, " COLUMNS ");
+ foreach(l1, tf->colnames)
+ {
+ char *colname = strVal(lfirst(l1));
+ Oid typid;
+ int32 typmod;
+ Node *colexpr;
+ Node *coldefexpr;
+ bool ordinality = tf->ordinalitycol == colnum;
+ bool notnull = bms_is_member(colnum, tf->notnulls);
+
+ typid = lfirst_oid(l2);
+ l2 = lnext(l2);
+ typmod = lfirst_int(l3);
+ l3 = lnext(l3);
+ colexpr = (Node *) lfirst(l4);
+ l4 = lnext(l4);
+ coldefexpr = (Node *) lfirst(l5);
+ l5 = lnext(l5);
+
+ if (colnum > 0)
+ appendStringInfoString(buf, ", ");
+ colnum++;
+
+ appendStringInfo(buf, "%s %s", quote_identifier(colname),
+ ordinality ? "FOR ORDINALITY" :
+ format_type_with_typemod(typid, typmod));
+ if (ordinality)
+ continue;
+
+ if (coldefexpr != NULL)
+ {
+ appendStringInfoString(buf, " DEFAULT (");
+ get_rule_expr((Node *) coldefexpr, context, showimplicit);
+ appendStringInfoChar(buf, ')');
+ }
+ if (colexpr != NULL)
+ {
+ appendStringInfoString(buf, " PATH (");
+ get_rule_expr((Node *) colexpr, context, showimplicit);
+ appendStringInfoChar(buf, ')');
+ }
+ if (notnull)
+ appendStringInfoString(buf, " NOT NULL");
+ }
+ }
+
+ appendStringInfoChar(buf, ')');
+}
+
/* ----------
* get_from_clause - Parse back a FROM clause
*
if (rte->funcordinality)
appendStringInfoString(buf, " WITH ORDINALITY");
break;
+ case RTE_TABLEFUNC:
+ get_tablefunc(rte->tablefunc, context, true);
+ break;
case RTE_VALUES:
/* Values list RTE */
appendStringInfoChar(buf, '(');
#include "commands/dbcommands.h"
#include "executor/executor.h"
#include "executor/spi.h"
+#include "executor/tablefunc.h"
#include "fmgr.h"
#include "lib/stringinfo.h"
#include "libpq/pqformat.h"
static int xml_xpathobjtoxmlarray(xmlXPathObjectPtr xpathobj,
ArrayBuildState *astate,
PgXmlErrorContext *xmlerrcxt);
+static xmlChar *pg_xmlCharStrndup(char *str, size_t len);
#endif /* USE_LIBXML */
static StringInfo query_to_xml_internal(const char *query, char *tablename,
char *tablename, bool nulls, bool tableforest,
const char *targetns, bool top_level);
+/* XMLTABLE support */
+#ifdef USE_LIBXML
+/* random number to identify XmlTableContext */
+#define XMLTABLE_CONTEXT_MAGIC 46922182
+typedef struct XmlTableBuilderData
+{
+ int magic;
+ int natts;
+ long int row_count;
+ PgXmlErrorContext *xmlerrcxt;
+ xmlParserCtxtPtr ctxt;
+ xmlDocPtr doc;
+ xmlXPathContextPtr xpathcxt;
+ xmlXPathCompExprPtr xpathcomp;
+ xmlXPathObjectPtr xpathobj;
+ xmlXPathCompExprPtr *xpathscomp;
+} XmlTableBuilderData;
+#endif
+
+static void XmlTableInitOpaque(struct TableFuncScanState *state, int natts);
+static void XmlTableSetDocument(struct TableFuncScanState *state, Datum value);
+static void XmlTableSetNamespace(struct TableFuncScanState *state, char *name,
+ char *uri);
+static void XmlTableSetRowFilter(struct TableFuncScanState *state, char *path);
+static void XmlTableSetColumnFilter(struct TableFuncScanState *state,
+ char *path, int colnum);
+static bool XmlTableFetchRow(struct TableFuncScanState *state);
+static Datum XmlTableGetValue(struct TableFuncScanState *state, int colnum,
+ Oid typid, int32 typmod, bool *isnull);
+static void XmlTableDestroyOpaque(struct TableFuncScanState *state);
+
+const TableFuncRoutine XmlTableRoutine =
+{
+ XmlTableInitOpaque,
+ XmlTableSetDocument,
+ XmlTableSetNamespace,
+ XmlTableSetRowFilter,
+ XmlTableSetColumnFilter,
+ XmlTableFetchRow,
+ XmlTableGetValue,
+ XmlTableDestroyOpaque
+};
+
#define NO_XML_SUPPORT() \
ereport(ERROR, \
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED), \
return result;
}
+/* Ditto, except input is char* */
+static xmlChar *
+pg_xmlCharStrndup(char *str, size_t len)
+{
+ xmlChar *result;
+
+ result = (xmlChar *) palloc((len + 1) * sizeof(xmlChar));
+ memcpy(result, str, len);
+ result[len] = '\0';
+
+ return result;
+}
+
/*
* str is the null-terminated input string. Remaining arguments are
* output arguments; each can be NULL if value is not wanted.
(errcode(ERRCODE_DATA_EXCEPTION),
errmsg("empty XPath expression")));
- string = (xmlChar *) palloc((len + 1) * sizeof(xmlChar));
- memcpy(string, datastr, len);
- string[len] = '\0';
-
- xpath_expr = (xmlChar *) palloc((xpath_len + 1) * sizeof(xmlChar));
- memcpy(xpath_expr, VARDATA(xpath_expr_text), xpath_len);
- xpath_expr[xpath_len] = '\0';
+ string = pg_xmlCharStrndup(datastr, len);
+ xpath_expr = pg_xmlCharStrndup(VARDATA(xpath_expr_text), xpath_len);
xmlerrcxt = pg_xml_init(PG_XML_STRICTNESS_ALL);
return 0;
#endif /* not USE_LIBXML */
}
+
+/*
+ * support functions for XMLTABLE
+ *
+ */
+#ifdef USE_LIBXML
+
+/*
+ * Returns private data from executor state. Ensure validity by check with
+ * MAGIC number.
+ */
+static inline XmlTableBuilderData *
+GetXmlTableBuilderPrivateData(TableFuncScanState *state, const char *fname)
+{
+ XmlTableBuilderData *result;
+
+ if (!IsA(state, TableFuncScanState))
+ elog(ERROR, "%s called with invalid TableFuncScanState", fname);
+ result = (XmlTableBuilderData *) state->opaque;
+ if (result->magic != XMLTABLE_CONTEXT_MAGIC)
+ elog(ERROR, "%s called with invalid TableFuncScanState", fname);
+
+ return result;
+}
+#endif
+
+/*
+ * XmlTableInitOpaque
+ * Fill in TableFuncScanState->opaque for XmlTable processor; initialize
+ * the XML parser.
+ *
+ * Note: Because we call pg_xml_init() here and pg_xml_done() in
+ * XmlTableDestroyOpaque, it is critical for robustness that no other
+ * executor nodes run until this node is processed to completion. Caller
+ * must execute this to completion (probably filling a tuplestore to exhaust
+ * this node in a single pass) instead of using row-per-call mode.
+ */
+static void
+XmlTableInitOpaque(TableFuncScanState *state, int natts)
+{
+#ifdef USE_LIBXML
+ volatile xmlParserCtxtPtr ctxt = NULL;
+ XmlTableBuilderData *xtCxt;
+ PgXmlErrorContext *xmlerrcxt;
+
+ xtCxt = palloc0(sizeof(XmlTableBuilderData));
+ xtCxt->magic = XMLTABLE_CONTEXT_MAGIC;
+ xtCxt->natts = natts;
+ xtCxt->xpathscomp = palloc0(sizeof(xmlXPathCompExprPtr) * natts);
+
+ xmlerrcxt = pg_xml_init(PG_XML_STRICTNESS_ALL);
+
+ PG_TRY();
+ {
+ xmlInitParser();
+
+ ctxt = xmlNewParserCtxt();
+ if (ctxt == NULL || xmlerrcxt->err_occurred)
+ xml_ereport(xmlerrcxt, ERROR, ERRCODE_OUT_OF_MEMORY,
+ "could not allocate parser context");
+ }
+ PG_CATCH();
+ {
+ if (ctxt != NULL)
+ xmlFreeParserCtxt(ctxt);
+
+ pg_xml_done(xmlerrcxt, true);
+
+ PG_RE_THROW();
+ }
+ PG_END_TRY();
+
+ xtCxt->xmlerrcxt = xmlerrcxt;
+ xtCxt->ctxt = ctxt;
+
+ state->opaque = xtCxt;
+#else
+ NO_XML_SUPPORT();
+#endif /* not USE_LIBXML */
+}
+
+/*
+ * XmlTableSetDocument
+ * Install the input document
+ */
+static void
+XmlTableSetDocument(TableFuncScanState *state, Datum value)
+{
+#ifdef USE_LIBXML
+ XmlTableBuilderData *xtCxt;
+ xmltype *xmlval = DatumGetXmlP(value);
+ char *str;
+ xmlChar *xstr;
+ int length;
+ volatile xmlDocPtr doc = NULL;
+ volatile xmlXPathContextPtr xpathcxt = NULL;
+
+ xtCxt = GetXmlTableBuilderPrivateData(state, "XmlTableSetDocument");
+
+ /*
+ * Use out function for casting to string (remove encoding property). See
+ * comment in xml_out.
+ */
+ str = xml_out_internal(xmlval, 0);
+
+ length = strlen(str);
+ xstr = pg_xmlCharStrndup(str, length);
+
+ PG_TRY();
+ {
+ doc = xmlCtxtReadMemory(xtCxt->ctxt, (char *) xstr, length, NULL, NULL, 0);
+ if (doc == NULL || xtCxt->xmlerrcxt->err_occurred)
+ xml_ereport(xtCxt->xmlerrcxt, ERROR, ERRCODE_INVALID_XML_DOCUMENT,
+ "could not parse XML document");
+ xpathcxt = xmlXPathNewContext(doc);
+ if (xpathcxt == NULL || xtCxt->xmlerrcxt->err_occurred)
+ xml_ereport(xtCxt->xmlerrcxt, ERROR, ERRCODE_OUT_OF_MEMORY,
+ "could not allocate XPath context");
+ xpathcxt->node = xmlDocGetRootElement(doc);
+ if (xpathcxt->node == NULL || xtCxt->xmlerrcxt->err_occurred)
+ xml_ereport(xtCxt->xmlerrcxt, ERROR, ERRCODE_INTERNAL_ERROR,
+ "could not find root XML element");
+ }
+ PG_CATCH();
+ {
+ if (xpathcxt != NULL)
+ xmlXPathFreeContext(xpathcxt);
+ if (doc != NULL)
+ xmlFreeDoc(doc);
+
+ PG_RE_THROW();
+ }
+ PG_END_TRY();
+
+ xtCxt->doc = doc;
+ xtCxt->xpathcxt = xpathcxt;
+#else
+ NO_XML_SUPPORT();
+#endif /* not USE_LIBXML */
+}
+
+/*
+ * XmlTableSetNamespace
+ * Add a namespace declaration
+ */
+static void
+XmlTableSetNamespace(TableFuncScanState *state, char *name, char *uri)
+{
+#ifdef USE_LIBXML
+ XmlTableBuilderData *xtCxt;
+
+ if (name == NULL)
+ ereport(ERROR,
+ (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+ errmsg("DEFAULT namespace is not supported")));
+ xtCxt = GetXmlTableBuilderPrivateData(state, "XmlTableSetNamespace");
+
+ if (xmlXPathRegisterNs(xtCxt->xpathcxt,
+ pg_xmlCharStrndup(name, strlen(name)),
+ pg_xmlCharStrndup(uri, strlen(uri))))
+ xml_ereport(xtCxt->xmlerrcxt, ERROR, ERRCODE_DATA_EXCEPTION,
+ "could not set XML namespace");
+#else
+ NO_XML_SUPPORT();
+#endif /* not USE_LIBXML */
+}
+
+/*
+ * XmlTableSetRowFilter
+ * Install the row-filter Xpath expression.
+ */
+static void
+XmlTableSetRowFilter(TableFuncScanState *state, char *path)
+{
+#ifdef USE_LIBXML
+ XmlTableBuilderData *xtCxt;
+ xmlChar *xstr;
+
+ xtCxt = GetXmlTableBuilderPrivateData(state, "XmlTableSetRowFilter");
+
+ if (*path == '\0')
+ ereport(ERROR,
+ (errcode(ERRCODE_DATA_EXCEPTION),
+ errmsg("row path filter must not be empty string")));
+
+ xstr = pg_xmlCharStrndup(path, strlen(path));
+
+ xtCxt->xpathcomp = xmlXPathCompile(xstr);
+ if (xtCxt->xpathcomp == NULL || xtCxt->xmlerrcxt->err_occurred)
+ xml_ereport(xtCxt->xmlerrcxt, ERROR, ERRCODE_SYNTAX_ERROR,
+ "invalid XPath expression");
+#else
+ NO_XML_SUPPORT();
+#endif /* not USE_LIBXML */
+}
+
+/*
+ * XmlTableSetColumnFilter
+ * Install the column-filter Xpath expression, for the given column.
+ */
+static void
+XmlTableSetColumnFilter(TableFuncScanState *state, char *path, int colnum)
+{
+#ifdef USE_LIBXML
+ XmlTableBuilderData *xtCxt;
+ xmlChar *xstr;
+
+ AssertArg(PointerIsValid(path));
+
+ xtCxt = GetXmlTableBuilderPrivateData(state, "XmlTableSetColumnFilter");
+
+ if (*path == '\0')
+ ereport(ERROR,
+ (errcode(ERRCODE_DATA_EXCEPTION),
+ errmsg("column path filter must not be empty string")));
+
+ xstr = pg_xmlCharStrndup(path, strlen(path));
+
+ xtCxt->xpathscomp[colnum] = xmlXPathCompile(xstr);
+ if (xtCxt->xpathscomp[colnum] == NULL || xtCxt->xmlerrcxt->err_occurred)
+ xml_ereport(xtCxt->xmlerrcxt, ERROR, ERRCODE_DATA_EXCEPTION,
+ "invalid XPath expression");
+#else
+ NO_XML_SUPPORT();
+#endif /* not USE_LIBXML */
+}
+
+/*
+ * XmlTableFetchRow
+ * Prepare the next "current" tuple for upcoming GetValue calls.
+ * Returns FALSE if the row-filter expression returned no more rows.
+ */
+static bool
+XmlTableFetchRow(TableFuncScanState *state)
+{
+#ifdef USE_LIBXML
+ XmlTableBuilderData *xtCxt;
+
+ xtCxt = GetXmlTableBuilderPrivateData(state, "XmlTableFetchRow");
+
+ /*
+ * XmlTable returns table - set of composite values. The error context, is
+ * used for producement more values, between two calls, there can be
+ * created and used another libxml2 error context. It is libxml2 global
+ * value, so it should be refreshed any time before any libxml2 usage,
+ * that is finished by returning some value.
+ */
+ xmlSetStructuredErrorFunc((void *) xtCxt->xmlerrcxt, xml_errorHandler);
+
+ if (xtCxt->xpathobj == NULL)
+ {
+ xtCxt->xpathobj = xmlXPathCompiledEval(xtCxt->xpathcomp, xtCxt->xpathcxt);
+ if (xtCxt->xpathobj == NULL || xtCxt->xmlerrcxt->err_occurred)
+ xml_ereport(xtCxt->xmlerrcxt, ERROR, ERRCODE_INTERNAL_ERROR,
+ "could not create XPath object");
+
+ xtCxt->row_count = 0;
+ }
+
+ if (xtCxt->xpathobj->type == XPATH_NODESET)
+ {
+ if (xtCxt->xpathobj->nodesetval != NULL)
+ {
+ if (xtCxt->row_count++ < xtCxt->xpathobj->nodesetval->nodeNr)
+ return true;
+ }
+ }
+
+ return false;
+#else
+ NO_XML_SUPPORT();
+#endif /* not USE_LIBXML */
+
+ return false;
+}
+
+/*
+ * XmlTableGetValue
+ * Return the value for column number 'colnum' for the current row. If
+ * column -1 is requested, return representation of the whole row.
+ *
+ * This leaks memory, so be sure to reset often the context in which it's
+ * called.
+ */
+static Datum
+XmlTableGetValue(TableFuncScanState *state, int colnum,
+ Oid typid, int32 typmod, bool *isnull)
+{
+#ifdef USE_LIBXML
+ XmlTableBuilderData *xtCxt;
+ Datum result = (Datum) 0;
+ xmlNodePtr cur;
+ char *cstr = NULL;
+ volatile xmlXPathObjectPtr xpathobj = NULL;
+
+ xtCxt = GetXmlTableBuilderPrivateData(state, "XmlTableGetValue");
+
+ Assert(xtCxt->xpathobj &&
+ xtCxt->xpathobj->type == XPATH_NODESET &&
+ xtCxt->xpathobj->nodesetval != NULL);
+
+ /* Propagate context related error context to libxml2 */
+ xmlSetStructuredErrorFunc((void *) xtCxt->xmlerrcxt, xml_errorHandler);
+
+ *isnull = false;
+
+ cur = xtCxt->xpathobj->nodesetval->nodeTab[xtCxt->row_count - 1];
+
+ Assert(xtCxt->xpathscomp[colnum] != NULL);
+
+ PG_TRY();
+ {
+ /* Set current node as entry point for XPath evaluation */
+ xmlXPathSetContextNode(cur, xtCxt->xpathcxt);
+
+ /* Evaluate column path */
+ xpathobj = xmlXPathCompiledEval(xtCxt->xpathscomp[colnum], xtCxt->xpathcxt);
+ if (xpathobj == NULL || xtCxt->xmlerrcxt->err_occurred)
+ xml_ereport(xtCxt->xmlerrcxt, ERROR, ERRCODE_INTERNAL_ERROR,
+ "could not create XPath object");
+
+ /*
+ * There are four possible cases, depending on the number of nodes
+ * returned by the XPath expression and the type of the target column:
+ * a) XPath returns no nodes. b) One node is returned, and column is
+ * of type XML. c) One node, column type other than XML. d) Multiple
+ * nodes are returned.
+ */
+ if (xpathobj->type == XPATH_NODESET)
+ {
+ int count = 0;
+
+ if (xpathobj->nodesetval != NULL)
+ count = xpathobj->nodesetval->nodeNr;
+
+ if (xpathobj->nodesetval == NULL || count == 0)
+ {
+ *isnull = true;
+ }
+ else if (count == 1 && typid == XMLOID)
+ {
+ text *textstr;
+
+ /* simple case, result is one value */
+ textstr = xml_xmlnodetoxmltype(xpathobj->nodesetval->nodeTab[0],
+ xtCxt->xmlerrcxt);
+ cstr = text_to_cstring(textstr);
+ }
+ else if (count == 1)
+ {
+ xmlChar *str;
+
+ str = xmlNodeListGetString(xtCxt->doc,
+ xpathobj->nodesetval->nodeTab[0]->xmlChildrenNode,
+ 1);
+
+ if (str != NULL)
+ {
+ PG_TRY();
+ {
+ cstr = pstrdup((char *) str);
+ }
+ PG_CATCH();
+ {
+ xmlFree(str);
+ PG_RE_THROW();
+ }
+ PG_END_TRY();
+ xmlFree(str);
+ }
+ else
+ {
+ /*
+ * This line ensure mapping of empty tags to PostgreSQL
+ * value. Usually we would to map a empty tag to empty
+ * string. But this mapping can create empty string when
+ * user doesn't expect it - when empty tag is enforced
+ * by libxml2 - when user uses a text() function for
+ * example.
+ */
+ cstr = "";
+ }
+ }
+ else
+ {
+ StringInfoData str;
+ int i;
+
+ Assert(count > 1);
+
+ /*
+ * When evaluating the XPath expression returns multiple
+ * nodes, the result is the concatenation of them all. The
+ * target type must be XML.
+ */
+ if (typid != XMLOID)
+ ereport(ERROR,
+ (errcode(ERRCODE_CARDINALITY_VIOLATION),
+ errmsg("more than one value returned by column XPath expression")));
+
+ /* Concatenate serialized values */
+ initStringInfo(&str);
+ for (i = 0; i < count; i++)
+ {
+ appendStringInfoText(&str,
+ xml_xmlnodetoxmltype(xpathobj->nodesetval->nodeTab[i],
+ xtCxt->xmlerrcxt));
+ }
+ cstr = str.data;
+ }
+ }
+ else if (xpathobj->type == XPATH_STRING)
+ {
+ cstr = (char *) xpathobj->stringval;
+ }
+ else
+ elog(ERROR, "unexpected XPath object type %u", xpathobj->type);
+
+ /*
+ * By here, either cstr contains the result value, or the isnull flag
+ * has been set.
+ */
+ Assert(cstr || *isnull);
+
+ if (!*isnull)
+ result = InputFunctionCall(&state->in_functions[colnum],
+ cstr,
+ state->typioparams[colnum],
+ typmod);
+ }
+ PG_CATCH();
+ {
+ if (xpathobj != NULL)
+ xmlXPathFreeObject(xpathobj);
+ PG_RE_THROW();
+ }
+ PG_END_TRY();
+
+ xmlXPathFreeObject(xpathobj);
+
+ return result;
+#else
+ NO_XML_SUPPORT();
+#endif /* not USE_LIBXML */
+}
+
+/*
+ * XmlTableDestroyOpaque
+ * Release all libxml2 resources
+ */
+static void
+XmlTableDestroyOpaque(TableFuncScanState *state)
+{
+#ifdef USE_LIBXML
+ XmlTableBuilderData *xtCxt;
+
+ xtCxt = GetXmlTableBuilderPrivateData(state, "XmlTableDestroyOpaque");
+
+ /* Propagate context related error context to libxml2 */
+ xmlSetStructuredErrorFunc((void *) xtCxt->xmlerrcxt, xml_errorHandler);
+
+ if (xtCxt->xpathscomp != NULL)
+ {
+ int i;
+
+ for (i = 0; i < xtCxt->natts; i++)
+ if (xtCxt->xpathscomp[i] != NULL)
+ xmlXPathFreeCompExpr(xtCxt->xpathscomp[i]);
+ }
+
+ if (xtCxt->xpathobj != NULL)
+ xmlXPathFreeObject(xtCxt->xpathobj);
+ if (xtCxt->xpathcomp != NULL)
+ xmlXPathFreeCompExpr(xtCxt->xpathcomp);
+ if (xtCxt->xpathcxt != NULL)
+ xmlXPathFreeContext(xtCxt->xpathcxt);
+ if (xtCxt->doc != NULL)
+ xmlFreeDoc(xtCxt->doc);
+ if (xtCxt->ctxt != NULL)
+ xmlFreeParserCtxt(xtCxt->ctxt);
+
+ pg_xml_done(xtCxt->xmlerrcxt, true);
+
+ /* not valid anymore */
+ xtCxt->magic = 0;
+ state->opaque = NULL;
+
+#else
+ NO_XML_SUPPORT();
+#endif /* not USE_LIBXML */
+}
*/
/* yyyymmddN */
-#define CATALOG_VERSION_NO 201703061
+#define CATALOG_VERSION_NO 201703081
#endif
--- /dev/null
+/*-------------------------------------------------------------------------
+ *
+ * nodeTableFuncscan.h
+ *
+ *
+ *
+ * Portions Copyright (c) 1996-2017, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/executor/nodeTableFuncscan.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef NODETABLEFUNCSCAN_H
+#define NODETABLEFUNCSCAN_H
+
+#include "nodes/execnodes.h"
+
+extern TableFuncScanState *ExecInitTableFuncScan(TableFuncScan *node, EState *estate, int eflags);
+extern TupleTableSlot *ExecTableFuncScan(TableFuncScanState *node);
+extern void ExecEndTableFuncScan(TableFuncScanState *node);
+extern void ExecReScanTableFuncScan(TableFuncScanState *node);
+
+#endif /* NODETABLEFUNCSCAN_H */
--- /dev/null
+/*-------------------------------------------------------------------------
+ *
+ * tablefunc.h
+ * interface for TableFunc executor node
+ *
+ * Portions Copyright (c) 1996-2017, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/executor/tablefunc.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef _TABLEFUNC_H
+#define _TABLEFUNC_H
+
+/* Forward-declare this to avoid including execnodes.h here */
+struct TableFuncScanState;
+
+/*
+ * TableFuncRoutine holds function pointers used for generating content of
+ * table-producer functions, such as XMLTABLE.
+ *
+ * InitBuilder initialize table builder private objects. The output tuple
+ * descriptor, input functions for the columns, and typioparams are passed
+ * from executor state.
+ *
+ * SetDoc is called to define the input document. The table builder may
+ * apply additional transformations not exposed outside the table builder
+ * context.
+ *
+ * SetNamespace is called to pass namespace declarations from the table
+ * expression. This function may be NULL if namespaces are not supported by
+ * the table builder. Namespaces must be given before setting the row and
+ * column filters. If the name is given as NULL, the entry shall be for the
+ * default namespace.
+ *
+ * SetRowFilter is called do define the row-generating filter, which shall be
+ * used to extract each row from the input document.
+ *
+ * SetColumnFilter is called once for each column, to define the column-
+ * generating filter for the given column.
+ *
+ * FetchRow shall be called repeatedly until it returns that no more rows are
+ * found in the document. On each invocation it shall set state in the table
+ * builder context such that each subsequent GetValue call returns the values
+ * for the indicated column for the row being processed.
+ *
+ * DestroyBuilder shall release all resources associated with a table builder
+ * context. It may be called either because all rows have been consumed, or
+ * because an error ocurred while processing the table expression.
+ */
+typedef struct TableFuncRoutine
+{
+ void (*InitOpaque) (struct TableFuncScanState *state, int natts);
+ void (*SetDocument) (struct TableFuncScanState *state, Datum value);
+ void (*SetNamespace) (struct TableFuncScanState *state, char *name,
+ char *uri);
+ void (*SetRowFilter) (struct TableFuncScanState *state, char *path);
+ void (*SetColumnFilter) (struct TableFuncScanState *state,
+ char *path, int colnum);
+ bool (*FetchRow) (struct TableFuncScanState *state);
+ Datum (*GetValue) (struct TableFuncScanState *state, int colnum,
+ Oid typid, int32 typmod, bool *isnull);
+ void (*DestroyOpaque) (struct TableFuncScanState *state);
+} TableFuncRoutine;
+
+#endif /* _TABLEFUNC_H */
int curr_idx;
} ValuesScanState;
+/* ----------------
+ * TableFuncScanState node
+ *
+ * Used in table-expression functions like XMLTABLE.
+ * ----------------
+ */
+typedef struct TableFuncScanState
+{
+ ScanState ss; /* its first field is NodeTag */
+ ExprState *docexpr; /* state for document expression */
+ ExprState *rowexpr; /* state for row-generating expression */
+ List *colexprs; /* state for column-generating expression */
+ List *coldefexprs; /* state for column default expressions */
+ List *ns_names; /* list of str nodes with namespace names */
+ List *ns_uris; /* list of states of namespace uri exprs */
+ Bitmapset *notnulls; /* nullability flag for each output column */
+ void *opaque; /* table builder private space */
+ const struct TableFuncRoutine *routine; /* table builder methods */
+ FmgrInfo *in_functions; /* input function for each column */
+ Oid *typioparams; /* typioparam for each column */
+ int64 ordinal; /* row number to be output next */
+ MemoryContext perValueCxt; /* short life context for value evaluation */
+ Tuplestorestate *tupstore; /* output tuple store */
+} TableFuncScanState;
+
/* ----------------
* CteScanState information
*
T_SubqueryScan,
T_FunctionScan,
T_ValuesScan,
+ T_TableFuncScan,
T_CteScan,
T_WorkTableScan,
T_ForeignScan,
T_TidScanState,
T_SubqueryScanState,
T_FunctionScanState,
+ T_TableFuncScanState,
T_ValuesScanState,
T_CteScanState,
T_WorkTableScanState,
*/
T_Alias,
T_RangeVar,
+ T_TableFunc,
T_Expr,
T_Var,
T_Const,
T_RangeSubselect,
T_RangeFunction,
T_RangeTableSample,
+ T_RangeTableFunc,
+ T_RangeTableFuncCol,
T_TypeName,
T_ColumnDef,
T_IndexElem,
* of function returning RECORD */
} RangeFunction;
+/*
+ * RangeTableFunc - raw form of "table functions" such as XMLTABLE
+ */
+typedef struct RangeTableFunc
+{
+ NodeTag type;
+ bool lateral; /* does it have LATERAL prefix? */
+ Node *docexpr; /* document expression */
+ Node *rowexpr; /* row generator expression */
+ List *namespaces; /* list of namespaces as ResTarget */
+ List *columns; /* list of RangeTableFuncCol */
+ Alias *alias; /* table alias & optional column aliases */
+ int location; /* token location, or -1 if unknown */
+} RangeTableFunc;
+
+/*
+ * RangeTableFuncCol - one column in a RangeTableFunc->columns
+ *
+ * If for_ordinality is true (FOR ORDINALITY), then the column is an int4
+ * column and the rest of the fields are ignored.
+ */
+typedef struct RangeTableFuncCol
+{
+ NodeTag type;
+ char *colname; /* name of generated column */
+ TypeName *typeName; /* type of generated column */
+ bool for_ordinality; /* does it have FOR ORDINALITY? */
+ bool is_not_null; /* does it have NOT NULL? */
+ Node *colexpr; /* column filter expression */
+ Node *coldefexpr; /* column default value expression */
+ int location; /* token location, or -1 if unknown */
+} RangeTableFuncCol;
+
/*
* RangeTableSample - TABLESAMPLE appearing in a raw FROM clause
*
RTE_SUBQUERY, /* subquery in FROM */
RTE_JOIN, /* join */
RTE_FUNCTION, /* function in FROM */
+ RTE_TABLEFUNC, /* TableFunc(.., column list) */
RTE_VALUES, /* VALUES (<exprlist>), (<exprlist>), ... */
RTE_CTE /* common table expr (WITH list element) */
} RTEKind;
List *functions; /* list of RangeTblFunction nodes */
bool funcordinality; /* is this called WITH ORDINALITY? */
+ /*
+ * Fields valid for a TableFunc RTE (else NULL):
+ */
+ TableFunc *tablefunc;
+
/*
* Fields valid for a values RTE (else NIL):
*/
List *values_lists; /* list of expression lists */
} ValuesScan;
+/* ----------------
+ * TableFunc scan node
+ * ----------------
+ */
+typedef struct TableFuncScan
+{
+ Scan scan;
+ TableFunc *tablefunc; /* table function node */
+} TableFuncScan;
+
/* ----------------
* CteScan node
* ----------------
#define PRIMNODES_H
#include "access/attnum.h"
+#include "nodes/bitmapset.h"
#include "nodes/pg_list.h"
int location; /* token location, or -1 if unknown */
} RangeVar;
+/*
+ * TableFunc - node for a table function, such as XMLTABLE.
+ */
+typedef struct TableFunc
+{
+ NodeTag type;
+ List *ns_uris; /* list of namespace uri */
+ List *ns_names; /* list of namespace names */
+ Node *docexpr; /* input document expression */
+ Node *rowexpr; /* row filter expression */
+ List *colnames; /* column names (list of String) */
+ List *coltypes; /* OID list of column type OIDs */
+ List *coltypmods; /* integer list of column typmods */
+ List *colcollations; /* OID list of column collation OIDs */
+ List *colexprs; /* list of column filter expressions */
+ List *coldefexprs; /* list of column default expressions */
+ Bitmapset *notnulls; /* nullability flag for each output column */
+ int ordinalitycol; /* counts from 0; -1 if none specified */
+ int location; /* token location, or -1 if unknown */
+} TableFunc;
+
/*
* IntoClause - target information for SELECT INTO, CREATE TABLE AS, and
* CREATE MATERIALIZED VIEW
RelOptInfo *baserel, ParamPathInfo *param_info);
extern void cost_functionscan(Path *path, PlannerInfo *root,
RelOptInfo *baserel, ParamPathInfo *param_info);
+extern void cost_tableexprscan(Path *path, PlannerInfo *root,
+ RelOptInfo *baserel, ParamPathInfo *param_info);
extern void cost_valuesscan(Path *path, PlannerInfo *root,
RelOptInfo *baserel, ParamPathInfo *param_info);
+extern void cost_tablefuncscan(Path *path, PlannerInfo *root,
+ RelOptInfo *baserel, ParamPathInfo *param_info);
extern void cost_ctescan(Path *path, PlannerInfo *root,
RelOptInfo *baserel, ParamPathInfo *param_info);
extern void cost_recursive_union(Path *runion, Path *nrterm, Path *rterm);
extern void set_values_size_estimates(PlannerInfo *root, RelOptInfo *rel);
extern void set_cte_size_estimates(PlannerInfo *root, RelOptInfo *rel,
double cte_rows);
+extern void set_tablefunc_size_estimates(PlannerInfo *root, RelOptInfo *rel);
extern void set_foreign_size_estimates(PlannerInfo *root, RelOptInfo *rel);
extern PathTarget *set_pathtarget_cost_width(PlannerInfo *root, PathTarget *target);
extern double compute_bitmap_pages(PlannerInfo *root, RelOptInfo *baserel,
List *pathkeys, Relids required_outer);
extern Path *create_functionscan_path(PlannerInfo *root, RelOptInfo *rel,
List *pathkeys, Relids required_outer);
+extern Path *create_tablexprscan_path(PlannerInfo *root, RelOptInfo *rel,
+ List *pathkeys, Relids required_outer);
extern Path *create_valuesscan_path(PlannerInfo *root, RelOptInfo *rel,
Relids required_outer);
+extern Path *create_tablefuncscan_path(PlannerInfo *root, RelOptInfo *rel,
+ Relids required_outer);
extern Path *create_ctescan_path(PlannerInfo *root, RelOptInfo *rel,
Relids required_outer);
extern Path *create_worktablescan_path(PlannerInfo *root, RelOptInfo *rel,
PG_KEYWORD("collate", COLLATE, RESERVED_KEYWORD)
PG_KEYWORD("collation", COLLATION, TYPE_FUNC_NAME_KEYWORD)
PG_KEYWORD("column", COLUMN, RESERVED_KEYWORD)
+PG_KEYWORD("columns", COLUMNS, UNRESERVED_KEYWORD)
PG_KEYWORD("comment", COMMENT, UNRESERVED_KEYWORD)
PG_KEYWORD("comments", COMMENTS, UNRESERVED_KEYWORD)
PG_KEYWORD("commit", COMMIT, UNRESERVED_KEYWORD)
PG_KEYWORD("xmlelement", XMLELEMENT, COL_NAME_KEYWORD)
PG_KEYWORD("xmlexists", XMLEXISTS, COL_NAME_KEYWORD)
PG_KEYWORD("xmlforest", XMLFOREST, COL_NAME_KEYWORD)
+PG_KEYWORD("xmlnamespaces", XMLNAMESPACES, COL_NAME_KEYWORD)
PG_KEYWORD("xmlparse", XMLPARSE, COL_NAME_KEYWORD)
PG_KEYWORD("xmlpi", XMLPI, COL_NAME_KEYWORD)
PG_KEYWORD("xmlroot", XMLROOT, COL_NAME_KEYWORD)
PG_KEYWORD("xmlserialize", XMLSERIALIZE, COL_NAME_KEYWORD)
+PG_KEYWORD("xmltable", XMLTABLE, COL_NAME_KEYWORD)
PG_KEYWORD("year", YEAR_P, UNRESERVED_KEYWORD)
PG_KEYWORD("yes", YES_P, UNRESERVED_KEYWORD)
PG_KEYWORD("zone", ZONE, UNRESERVED_KEYWORD)
Oid targetTypeId,
const char *constructName);
+extern Node *coerce_to_specific_type_typmod(ParseState *pstate, Node *node,
+ Oid targetTypeId, int32 targetTypmod,
+ const char *constructName);
+
extern int parser_coercion_errposition(ParseState *pstate,
int coerce_location,
Node *input_expr);
Alias *alias,
bool lateral,
bool inFromCl);
+extern RangeTblEntry *addRangeTableEntryForTableFunc(ParseState *pstate,
+ TableFunc *tf,
+ Alias *alias,
+ bool lateral,
+ bool inFromCl);
extern RangeTblEntry *addRangeTableEntryForJoin(ParseState *pstate,
List *colnames,
JoinType jointype,
#include "fmgr.h"
#include "nodes/execnodes.h"
#include "nodes/primnodes.h"
+#include "executor/tablefunc.h"
typedef struct varlena xmltype;
extern int xmloption; /* XmlOptionType, but int for guc enum */
+extern const TableFuncRoutine XmlTableRoutine;
+
#endif /* XML_H */
<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN" "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd"><chapter> </chapter>
(1 row)
+-- XMLPATH tests
+CREATE TABLE xmldata(data xml);
+INSERT INTO xmldata VALUES('<ROWS>
+<ROW id="1">
+ <COUNTRY_ID>AU</COUNTRY_ID>
+ <COUNTRY_NAME>Australia</COUNTRY_NAME>
+ <REGION_ID>3</REGION_ID>
+</ROW>
+<ROW id="2">
+ <COUNTRY_ID>CN</COUNTRY_ID>
+ <COUNTRY_NAME>China</COUNTRY_NAME>
+ <REGION_ID>3</REGION_ID>
+</ROW>
+<ROW id="3">
+ <COUNTRY_ID>HK</COUNTRY_ID>
+ <COUNTRY_NAME>HongKong</COUNTRY_NAME>
+ <REGION_ID>3</REGION_ID>
+</ROW>
+<ROW id="4">
+ <COUNTRY_ID>IN</COUNTRY_ID>
+ <COUNTRY_NAME>India</COUNTRY_NAME>
+ <REGION_ID>3</REGION_ID>
+</ROW>
+<ROW id="5">
+ <COUNTRY_ID>JP</COUNTRY_ID>
+ <COUNTRY_NAME>Japan</COUNTRY_NAME>
+ <REGION_ID>3</REGION_ID><PREMIER_NAME>Sinzo Abe</PREMIER_NAME>
+</ROW>
+<ROW id="6">
+ <COUNTRY_ID>SG</COUNTRY_ID>
+ <COUNTRY_NAME>Singapore</COUNTRY_NAME>
+ <REGION_ID>3</REGION_ID><SIZE unit="km">791</SIZE>
+</ROW>
+</ROWS>');
+-- XMLTABLE with columns
+SELECT xmltable.*
+ FROM (SELECT data FROM xmldata) x,
+ LATERAL XMLTABLE('/ROWS/ROW'
+ PASSING data
+ COLUMNS id int PATH '@id',
+ _id FOR ORDINALITY,
+ country_name text PATH 'COUNTRY_NAME' NOT NULL,
+ country_id text PATH 'COUNTRY_ID',
+ region_id int PATH 'REGION_ID',
+ size float PATH 'SIZE',
+ unit text PATH 'SIZE/@unit',
+ premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified');
+ id | _id | country_name | country_id | region_id | size | unit | premier_name
+----+-----+--------------+------------+-----------+------+------+---------------
+ 1 | 1 | Australia | AU | 3 | | | not specified
+ 2 | 2 | China | CN | 3 | | | not specified
+ 3 | 3 | HongKong | HK | 3 | | | not specified
+ 4 | 4 | India | IN | 3 | | | not specified
+ 5 | 5 | Japan | JP | 3 | | | Sinzo Abe
+ 6 | 6 | Singapore | SG | 3 | 791 | km | not specified
+(6 rows)
+
+CREATE VIEW xmltableview1 AS SELECT xmltable.*
+ FROM (SELECT data FROM xmldata) x,
+ LATERAL XMLTABLE('/ROWS/ROW'
+ PASSING data
+ COLUMNS id int PATH '@id',
+ _id FOR ORDINALITY,
+ country_name text PATH 'COUNTRY_NAME' NOT NULL,
+ country_id text PATH 'COUNTRY_ID',
+ region_id int PATH 'REGION_ID',
+ size float PATH 'SIZE',
+ unit text PATH 'SIZE/@unit',
+ premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified');
+SELECT * FROM xmltableview1;
+ id | _id | country_name | country_id | region_id | size | unit | premier_name
+----+-----+--------------+------------+-----------+------+------+---------------
+ 1 | 1 | Australia | AU | 3 | | | not specified
+ 2 | 2 | China | CN | 3 | | | not specified
+ 3 | 3 | HongKong | HK | 3 | | | not specified
+ 4 | 4 | India | IN | 3 | | | not specified
+ 5 | 5 | Japan | JP | 3 | | | Sinzo Abe
+ 6 | 6 | Singapore | SG | 3 | 791 | km | not specified
+(6 rows)
+
+\sv xmltableview1
+CREATE OR REPLACE VIEW public.xmltableview1 AS
+ SELECT "xmltable".id,
+ "xmltable"._id,
+ "xmltable".country_name,
+ "xmltable".country_id,
+ "xmltable".region_id,
+ "xmltable".size,
+ "xmltable".unit,
+ "xmltable".premier_name
+ FROM ( SELECT xmldata.data
+ FROM xmldata) x,
+ LATERAL XMLTABLE(('/ROWS/ROW'::text) PASSING (x.data) COLUMNS id integer PATH ('@id'::text), _id FOR ORDINALITY, country_name text PATH ('COUNTRY_NAME'::text) NOT NULL, country_id text PATH ('COUNTRY_ID'::text), region_id integer PATH ('REGION_ID'::text), size double precision PATH ('SIZE'::text), unit text PATH ('SIZE/@unit'::text), premier_name text DEFAULT ('not specified'::text) PATH ('PREMIER_NAME'::text))
+EXPLAIN (COSTS OFF) SELECT * FROM xmltableview1;
+ QUERY PLAN
+-----------------------------------------
+ Nested Loop
+ -> Seq Scan on xmldata
+ -> Table Function Scan on "xmltable"
+(3 rows)
+
+EXPLAIN (COSTS OFF, VERBOSE) SELECT * FROM xmltableview1;
+ QUERY PLAN
+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
+ Nested Loop
+ Output: "xmltable".id, "xmltable"._id, "xmltable".country_name, "xmltable".country_id, "xmltable".region_id, "xmltable".size, "xmltable".unit, "xmltable".premier_name
+ -> Seq Scan on public.xmldata
+ Output: xmldata.data
+ -> Table Function Scan on "xmltable"
+ Output: "xmltable".id, "xmltable"._id, "xmltable".country_name, "xmltable".country_id, "xmltable".region_id, "xmltable".size, "xmltable".unit, "xmltable".premier_name
+ Table Function Call: XMLTABLE(('/ROWS/ROW'::text) PASSING (xmldata.data) COLUMNS id integer PATH ('@id'::text), _id FOR ORDINALITY, country_name text PATH ('COUNTRY_NAME'::text) NOT NULL, country_id text PATH ('COUNTRY_ID'::text), region_id integer PATH ('REGION_ID'::text), size double precision PATH ('SIZE'::text), unit text PATH ('SIZE/@unit'::text), premier_name text DEFAULT ('not specified'::text) PATH ('PREMIER_NAME'::text))
+(7 rows)
+
+-- XMLNAMESPACES tests
+SELECT * FROM XMLTABLE(XMLNAMESPACES('http://x.y' AS zz),
+ '/zz:rows/zz:row'
+ PASSING '<rows xmlns="http://x.y"><row><a>10</a></row></rows>'
+ COLUMNS a int PATH 'zz:a');
+ a
+----
+ 10
+(1 row)
+
+CREATE VIEW xmltableview2 AS SELECT * FROM XMLTABLE(XMLNAMESPACES('http://x.y' AS zz),
+ '/zz:rows/zz:row'
+ PASSING '<rows xmlns="http://x.y"><row><a>10</a></row></rows>'
+ COLUMNS a int PATH 'zz:a');
+SELECT * FROM xmltableview2;
+ a
+----
+ 10
+(1 row)
+
+SELECT * FROM XMLTABLE(XMLNAMESPACES(DEFAULT 'http://x.y'),
+ '/rows/row'
+ PASSING '<rows xmlns="http://x.y"><row><a>10</a></row></rows>'
+ COLUMNS a int PATH 'a');
+ERROR: DEFAULT namespace is not supported
+-- used in prepare statements
+PREPARE pp AS
+SELECT xmltable.*
+ FROM (SELECT data FROM xmldata) x,
+ LATERAL XMLTABLE('/ROWS/ROW'
+ PASSING data
+ COLUMNS id int PATH '@id',
+ _id FOR ORDINALITY,
+ country_name text PATH 'COUNTRY_NAME' NOT NULL,
+ country_id text PATH 'COUNTRY_ID',
+ region_id int PATH 'REGION_ID',
+ size float PATH 'SIZE',
+ unit text PATH 'SIZE/@unit',
+ premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified');
+EXECUTE pp;
+ id | _id | country_name | country_id | region_id | size | unit | premier_name
+----+-----+--------------+------------+-----------+------+------+---------------
+ 1 | 1 | Australia | AU | 3 | | | not specified
+ 2 | 2 | China | CN | 3 | | | not specified
+ 3 | 3 | HongKong | HK | 3 | | | not specified
+ 4 | 4 | India | IN | 3 | | | not specified
+ 5 | 5 | Japan | JP | 3 | | | Sinzo Abe
+ 6 | 6 | Singapore | SG | 3 | 791 | km | not specified
+(6 rows)
+
+SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS "COUNTRY_NAME" text, "REGION_ID" int);
+ COUNTRY_NAME | REGION_ID
+--------------+-----------
+ India | 3
+ Japan | 3
+(2 rows)
+
+SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id FOR ORDINALITY, "COUNTRY_NAME" text, "REGION_ID" int);
+ id | COUNTRY_NAME | REGION_ID
+----+--------------+-----------
+ 1 | India | 3
+ 2 | Japan | 3
+(2 rows)
+
+SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id int PATH '@id', "COUNTRY_NAME" text, "REGION_ID" int);
+ id | COUNTRY_NAME | REGION_ID
+----+--------------+-----------
+ 4 | India | 3
+ 5 | Japan | 3
+(2 rows)
+
+SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id int PATH '@id');
+ id
+----
+ 4
+ 5
+(2 rows)
+
+SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id FOR ORDINALITY);
+ id
+----
+ 1
+ 2
+(2 rows)
+
+SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id int PATH '@id', "COUNTRY_NAME" text, "REGION_ID" int, rawdata xml PATH '.');
+ id | COUNTRY_NAME | REGION_ID | rawdata
+----+--------------+-----------+------------------------------------------------------------------
+ 4 | India | 3 | <ROW id="4"> +
+ | | | <COUNTRY_ID>IN</COUNTRY_ID> +
+ | | | <COUNTRY_NAME>India</COUNTRY_NAME> +
+ | | | <REGION_ID>3</REGION_ID> +
+ | | | </ROW>
+ 5 | Japan | 3 | <ROW id="5"> +
+ | | | <COUNTRY_ID>JP</COUNTRY_ID> +
+ | | | <COUNTRY_NAME>Japan</COUNTRY_NAME> +
+ | | | <REGION_ID>3</REGION_ID><PREMIER_NAME>Sinzo Abe</PREMIER_NAME>+
+ | | | </ROW>
+(2 rows)
+
+SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id int PATH '@id', "COUNTRY_NAME" text, "REGION_ID" int, rawdata xml PATH './*');
+ id | COUNTRY_NAME | REGION_ID | rawdata
+----+--------------+-----------+-----------------------------------------------------------------------------------------------------------------------------
+ 4 | India | 3 | <COUNTRY_ID>IN</COUNTRY_ID><COUNTRY_NAME>India</COUNTRY_NAME><REGION_ID>3</REGION_ID>
+ 5 | Japan | 3 | <COUNTRY_ID>JP</COUNTRY_ID><COUNTRY_NAME>Japan</COUNTRY_NAME><REGION_ID>3</REGION_ID><PREMIER_NAME>Sinzo Abe</PREMIER_NAME>
+(2 rows)
+
+SELECT * FROM xmltable('/root' passing '<root><element>a1a<!-- aaaa -->a2a<?aaaaa?> <!--z--> bbbb<x>xxx</x>cccc</element></root>' COLUMNS element text);
+ element
+-------------------
+ a1aa2a bbbbcccc
+(1 row)
+
+SELECT * FROM xmltable('/root' passing '<root><element>a1a<!-- aaaa -->a2a<?aaaaa?> <!--z--> bbbb<x>xxx</x>cccc</element></root>' COLUMNS element text PATH 'element/text()'); -- should fail
+ERROR: more than one value returned by column XPath expression
+-- CDATA test
+select * from xmltable('r' passing '<d><r><c><![CDATA[<hello> &"<>!<a>foo</a>]]></c></r><r><c>2</c></r></d>' columns c text);
+ c
+-------------------------
+ <hello> &"<>!<a>foo</a>
+ 2
+(2 rows)
+
+-- XML builtin entities
+SELECT * FROM xmltable('/x/a' PASSING '<x><a><ent>'</ent></a><a><ent>"</ent></a><a><ent>&</ent></a><a><ent><</ent></a><a><ent>></ent></a></x>' COLUMNS ent text);
+ ent
+-----
+ '
+ "
+ &
+ <
+ >
+(5 rows)
+
+SELECT * FROM xmltable('/x/a' PASSING '<x><a><ent>'</ent></a><a><ent>"</ent></a><a><ent>&</ent></a><a><ent><</ent></a><a><ent>></ent></a></x>' COLUMNS ent xml);
+ ent
+------------------
+ <ent>'</ent>
+ <ent>"</ent>
+ <ent>&</ent>
+ <ent><</ent>
+ <ent>></ent>
+(5 rows)
+
+EXPLAIN (VERBOSE, COSTS OFF)
+SELECT xmltable.*
+ FROM (SELECT data FROM xmldata) x,
+ LATERAL XMLTABLE('/ROWS/ROW'
+ PASSING data
+ COLUMNS id int PATH '@id',
+ _id FOR ORDINALITY,
+ country_name text PATH 'COUNTRY_NAME' NOT NULL,
+ country_id text PATH 'COUNTRY_ID',
+ region_id int PATH 'REGION_ID',
+ size float PATH 'SIZE',
+ unit text PATH 'SIZE/@unit',
+ premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified');
+ QUERY PLAN
+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
+ Nested Loop
+ Output: "xmltable".id, "xmltable"._id, "xmltable".country_name, "xmltable".country_id, "xmltable".region_id, "xmltable".size, "xmltable".unit, "xmltable".premier_name
+ -> Seq Scan on public.xmldata
+ Output: xmldata.data
+ -> Table Function Scan on "xmltable"
+ Output: "xmltable".id, "xmltable"._id, "xmltable".country_name, "xmltable".country_id, "xmltable".region_id, "xmltable".size, "xmltable".unit, "xmltable".premier_name
+ Table Function Call: XMLTABLE(('/ROWS/ROW'::text) PASSING (xmldata.data) COLUMNS id integer PATH ('@id'::text), _id FOR ORDINALITY, country_name text PATH ('COUNTRY_NAME'::text) NOT NULL, country_id text PATH ('COUNTRY_ID'::text), region_id integer PATH ('REGION_ID'::text), size double precision PATH ('SIZE'::text), unit text PATH ('SIZE/@unit'::text), premier_name text DEFAULT ('not specified'::text) PATH ('PREMIER_NAME'::text))
+(7 rows)
+
+-- test qual
+SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS "COUNTRY_NAME" text, "REGION_ID" int) WHERE "COUNTRY_NAME" = 'Japan';
+ COUNTRY_NAME | REGION_ID
+--------------+-----------
+ Japan | 3
+(1 row)
+
+EXPLAIN (VERBOSE, COSTS OFF)
+SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS "COUNTRY_NAME" text, "REGION_ID" int) WHERE "COUNTRY_NAME" = 'Japan';
+ QUERY PLAN
+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
+ Nested Loop
+ Output: "xmltable"."COUNTRY_NAME", "xmltable"."REGION_ID"
+ -> Seq Scan on public.xmldata
+ Output: xmldata.data
+ -> Table Function Scan on "xmltable"
+ Output: "xmltable"."COUNTRY_NAME", "xmltable"."REGION_ID"
+ Table Function Call: XMLTABLE(('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]'::text) PASSING (xmldata.data) COLUMNS "COUNTRY_NAME" text, "REGION_ID" integer)
+ Filter: ("xmltable"."COUNTRY_NAME" = 'Japan'::text)
+(8 rows)
+
+-- should to work with more data
+INSERT INTO xmldata VALUES('<ROWS>
+<ROW id="10">
+ <COUNTRY_ID>CZ</COUNTRY_ID>
+ <COUNTRY_NAME>Czech Republic</COUNTRY_NAME>
+ <REGION_ID>2</REGION_ID><PREMIER_NAME>Milos Zeman</PREMIER_NAME>
+</ROW>
+<ROW id="11">
+ <COUNTRY_ID>DE</COUNTRY_ID>
+ <COUNTRY_NAME>Germany</COUNTRY_NAME>
+ <REGION_ID>2</REGION_ID>
+</ROW>
+<ROW id="12">
+ <COUNTRY_ID>FR</COUNTRY_ID>
+ <COUNTRY_NAME>France</COUNTRY_NAME>
+ <REGION_ID>2</REGION_ID>
+</ROW>
+</ROWS>');
+INSERT INTO xmldata VALUES('<ROWS>
+<ROW id="20">
+ <COUNTRY_ID>EG</COUNTRY_ID>
+ <COUNTRY_NAME>Egypt</COUNTRY_NAME>
+ <REGION_ID>1</REGION_ID>
+</ROW>
+<ROW id="21">
+ <COUNTRY_ID>SD</COUNTRY_ID>
+ <COUNTRY_NAME>Sudan</COUNTRY_NAME>
+ <REGION_ID>1</REGION_ID>
+</ROW>
+</ROWS>');
+SELECT xmltable.*
+ FROM (SELECT data FROM xmldata) x,
+ LATERAL XMLTABLE('/ROWS/ROW'
+ PASSING data
+ COLUMNS id int PATH '@id',
+ _id FOR ORDINALITY,
+ country_name text PATH 'COUNTRY_NAME' NOT NULL,
+ country_id text PATH 'COUNTRY_ID',
+ region_id int PATH 'REGION_ID',
+ size float PATH 'SIZE',
+ unit text PATH 'SIZE/@unit',
+ premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified');
+ id | _id | country_name | country_id | region_id | size | unit | premier_name
+----+-----+----------------+------------+-----------+------+------+---------------
+ 1 | 1 | Australia | AU | 3 | | | not specified
+ 2 | 2 | China | CN | 3 | | | not specified
+ 3 | 3 | HongKong | HK | 3 | | | not specified
+ 4 | 4 | India | IN | 3 | | | not specified
+ 5 | 5 | Japan | JP | 3 | | | Sinzo Abe
+ 6 | 6 | Singapore | SG | 3 | 791 | km | not specified
+ 10 | 1 | Czech Republic | CZ | 2 | | | Milos Zeman
+ 11 | 2 | Germany | DE | 2 | | | not specified
+ 12 | 3 | France | FR | 2 | | | not specified
+ 20 | 1 | Egypt | EG | 1 | | | not specified
+ 21 | 2 | Sudan | SD | 1 | | | not specified
+(11 rows)
+
+SELECT xmltable.*
+ FROM (SELECT data FROM xmldata) x,
+ LATERAL XMLTABLE('/ROWS/ROW'
+ PASSING data
+ COLUMNS id int PATH '@id',
+ _id FOR ORDINALITY,
+ country_name text PATH 'COUNTRY_NAME' NOT NULL,
+ country_id text PATH 'COUNTRY_ID',
+ region_id int PATH 'REGION_ID',
+ size float PATH 'SIZE',
+ unit text PATH 'SIZE/@unit',
+ premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified')
+ WHERE region_id = 2;
+ id | _id | country_name | country_id | region_id | size | unit | premier_name
+----+-----+----------------+------------+-----------+------+------+---------------
+ 10 | 1 | Czech Republic | CZ | 2 | | | Milos Zeman
+ 11 | 2 | Germany | DE | 2 | | | not specified
+ 12 | 3 | France | FR | 2 | | | not specified
+(3 rows)
+
+EXPLAIN (VERBOSE, COSTS OFF)
+SELECT xmltable.*
+ FROM (SELECT data FROM xmldata) x,
+ LATERAL XMLTABLE('/ROWS/ROW'
+ PASSING data
+ COLUMNS id int PATH '@id',
+ _id FOR ORDINALITY,
+ country_name text PATH 'COUNTRY_NAME' NOT NULL,
+ country_id text PATH 'COUNTRY_ID',
+ region_id int PATH 'REGION_ID',
+ size float PATH 'SIZE',
+ unit text PATH 'SIZE/@unit',
+ premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified')
+ WHERE region_id = 2;
+ QUERY PLAN
+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
+ Nested Loop
+ Output: "xmltable".id, "xmltable"._id, "xmltable".country_name, "xmltable".country_id, "xmltable".region_id, "xmltable".size, "xmltable".unit, "xmltable".premier_name
+ -> Seq Scan on public.xmldata
+ Output: xmldata.data
+ -> Table Function Scan on "xmltable"
+ Output: "xmltable".id, "xmltable"._id, "xmltable".country_name, "xmltable".country_id, "xmltable".region_id, "xmltable".size, "xmltable".unit, "xmltable".premier_name
+ Table Function Call: XMLTABLE(('/ROWS/ROW'::text) PASSING (xmldata.data) COLUMNS id integer PATH ('@id'::text), _id FOR ORDINALITY, country_name text PATH ('COUNTRY_NAME'::text) NOT NULL, country_id text PATH ('COUNTRY_ID'::text), region_id integer PATH ('REGION_ID'::text), size double precision PATH ('SIZE'::text), unit text PATH ('SIZE/@unit'::text), premier_name text DEFAULT ('not specified'::text) PATH ('PREMIER_NAME'::text))
+ Filter: ("xmltable".region_id = 2)
+(8 rows)
+
+-- should fail, NULL value
+SELECT xmltable.*
+ FROM (SELECT data FROM xmldata) x,
+ LATERAL XMLTABLE('/ROWS/ROW'
+ PASSING data
+ COLUMNS id int PATH '@id',
+ _id FOR ORDINALITY,
+ country_name text PATH 'COUNTRY_NAME' NOT NULL,
+ country_id text PATH 'COUNTRY_ID',
+ region_id int PATH 'REGION_ID',
+ size float PATH 'SIZE' NOT NULL,
+ unit text PATH 'SIZE/@unit',
+ premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified');
+ERROR: null is not allowed in column "size"
+-- if all is ok, then result is empty
+-- one line xml test
+WITH
+ x AS (SELECT proname, proowner, procost::numeric, pronargs,
+ array_to_string(proargnames,',') as proargnames,
+ case when proargtypes <> '' then array_to_string(proargtypes::oid[],',') end as proargtypes
+ FROM pg_proc WHERE proname = 'f_leak'),
+ y AS (SELECT xmlelement(name proc,
+ xmlforest(proname, proowner,
+ procost, pronargs,
+ proargnames, proargtypes)) as proc
+ FROM x),
+ z AS (SELECT xmltable.*
+ FROM y,
+ LATERAL xmltable('/proc' PASSING proc
+ COLUMNS proname name,
+ proowner oid,
+ procost float,
+ pronargs int,
+ proargnames text,
+ proargtypes text))
+ SELECT * FROM z
+ EXCEPT SELECT * FROM x;
+ proname | proowner | procost | pronargs | proargnames | proargtypes
+---------+----------+---------+----------+-------------+-------------
+(0 rows)
+
+-- multi line xml test, result should be empty too
+WITH
+ x AS (SELECT proname, proowner, procost::numeric, pronargs,
+ array_to_string(proargnames,',') as proargnames,
+ case when proargtypes <> '' then array_to_string(proargtypes::oid[],',') end as proargtypes
+ FROM pg_proc),
+ y AS (SELECT xmlelement(name data,
+ xmlagg(xmlelement(name proc,
+ xmlforest(proname, proowner, procost,
+ pronargs, proargnames, proargtypes)))) as doc
+ FROM x),
+ z AS (SELECT xmltable.*
+ FROM y,
+ LATERAL xmltable('/data/proc' PASSING doc
+ COLUMNS proname name,
+ proowner oid,
+ procost float,
+ pronargs int,
+ proargnames text,
+ proargtypes text))
+ SELECT * FROM z
+ EXCEPT SELECT * FROM x;
+ proname | proowner | procost | pronargs | proargnames | proargtypes
+---------+----------+---------+----------+-------------+-------------
+(0 rows)
+
+CREATE TABLE xmltest2(x xml, _path text);
+INSERT INTO xmltest2 VALUES('<d><r><ac>1</ac></r></d>', 'A');
+INSERT INTO xmltest2 VALUES('<d><r><bc>2</bc></r></d>', 'B');
+INSERT INTO xmltest2 VALUES('<d><r><cc>3</cc></r></d>', 'C');
+INSERT INTO xmltest2 VALUES('<d><r><dc>2</dc></r></d>', 'D');
+SELECT xmltable.* FROM xmltest2, LATERAL xmltable('/d/r' PASSING x COLUMNS a int PATH '' || lower(_path) || 'c');
+ a
+---
+ 1
+ 2
+ 3
+ 2
+(4 rows)
+
+SELECT xmltable.* FROM xmltest2, LATERAL xmltable(('/d/r/' || lower(_path) || 'c') PASSING x COLUMNS a int PATH '.');
+ a
+---
+ 1
+ 2
+ 3
+ 2
+(4 rows)
+
+SELECT xmltable.* FROM xmltest2, LATERAL xmltable(('/d/r/' || lower(_path) || 'c') PASSING x COLUMNS a int PATH 'x' DEFAULT ascii(_path) - 54);
+ a
+----
+ 11
+ 12
+ 13
+ 14
+(4 rows)
+
ERROR: unsupported XML feature
DETAIL: This functionality requires the server to be built with libxml support.
HINT: You need to rebuild PostgreSQL using --with-libxml.
+-- XMLPATH tests
+CREATE TABLE xmldata(data xml);
+INSERT INTO xmldata VALUES('<ROWS>
+<ROW id="1">
+ <COUNTRY_ID>AU</COUNTRY_ID>
+ <COUNTRY_NAME>Australia</COUNTRY_NAME>
+ <REGION_ID>3</REGION_ID>
+</ROW>
+<ROW id="2">
+ <COUNTRY_ID>CN</COUNTRY_ID>
+ <COUNTRY_NAME>China</COUNTRY_NAME>
+ <REGION_ID>3</REGION_ID>
+</ROW>
+<ROW id="3">
+ <COUNTRY_ID>HK</COUNTRY_ID>
+ <COUNTRY_NAME>HongKong</COUNTRY_NAME>
+ <REGION_ID>3</REGION_ID>
+</ROW>
+<ROW id="4">
+ <COUNTRY_ID>IN</COUNTRY_ID>
+ <COUNTRY_NAME>India</COUNTRY_NAME>
+ <REGION_ID>3</REGION_ID>
+</ROW>
+<ROW id="5">
+ <COUNTRY_ID>JP</COUNTRY_ID>
+ <COUNTRY_NAME>Japan</COUNTRY_NAME>
+ <REGION_ID>3</REGION_ID><PREMIER_NAME>Sinzo Abe</PREMIER_NAME>
+</ROW>
+<ROW id="6">
+ <COUNTRY_ID>SG</COUNTRY_ID>
+ <COUNTRY_NAME>Singapore</COUNTRY_NAME>
+ <REGION_ID>3</REGION_ID><SIZE unit="km">791</SIZE>
+</ROW>
+</ROWS>');
+ERROR: unsupported XML feature
+LINE 1: INSERT INTO xmldata VALUES('<ROWS>
+ ^
+DETAIL: This functionality requires the server to be built with libxml support.
+HINT: You need to rebuild PostgreSQL using --with-libxml.
+-- XMLTABLE with columns
+SELECT xmltable.*
+ FROM (SELECT data FROM xmldata) x,
+ LATERAL XMLTABLE('/ROWS/ROW'
+ PASSING data
+ COLUMNS id int PATH '@id',
+ _id FOR ORDINALITY,
+ country_name text PATH 'COUNTRY_NAME' NOT NULL,
+ country_id text PATH 'COUNTRY_ID',
+ region_id int PATH 'REGION_ID',
+ size float PATH 'SIZE',
+ unit text PATH 'SIZE/@unit',
+ premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified');
+ id | _id | country_name | country_id | region_id | size | unit | premier_name
+----+-----+--------------+------------+-----------+------+------+--------------
+(0 rows)
+
+CREATE VIEW xmltableview1 AS SELECT xmltable.*
+ FROM (SELECT data FROM xmldata) x,
+ LATERAL XMLTABLE('/ROWS/ROW'
+ PASSING data
+ COLUMNS id int PATH '@id',
+ _id FOR ORDINALITY,
+ country_name text PATH 'COUNTRY_NAME' NOT NULL,
+ country_id text PATH 'COUNTRY_ID',
+ region_id int PATH 'REGION_ID',
+ size float PATH 'SIZE',
+ unit text PATH 'SIZE/@unit',
+ premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified');
+SELECT * FROM xmltableview1;
+ id | _id | country_name | country_id | region_id | size | unit | premier_name
+----+-----+--------------+------------+-----------+------+------+--------------
+(0 rows)
+
+\sv xmltableview1
+CREATE OR REPLACE VIEW public.xmltableview1 AS
+ SELECT "xmltable".id,
+ "xmltable"._id,
+ "xmltable".country_name,
+ "xmltable".country_id,
+ "xmltable".region_id,
+ "xmltable".size,
+ "xmltable".unit,
+ "xmltable".premier_name
+ FROM ( SELECT xmldata.data
+ FROM xmldata) x,
+ LATERAL XMLTABLE(('/ROWS/ROW'::text) PASSING (x.data) COLUMNS id integer PATH ('@id'::text), _id FOR ORDINALITY, country_name text PATH ('COUNTRY_NAME'::text) NOT NULL, country_id text PATH ('COUNTRY_ID'::text), region_id integer PATH ('REGION_ID'::text), size double precision PATH ('SIZE'::text), unit text PATH ('SIZE/@unit'::text), premier_name text DEFAULT ('not specified'::text) PATH ('PREMIER_NAME'::text))
+EXPLAIN (COSTS OFF) SELECT * FROM xmltableview1;
+ QUERY PLAN
+-----------------------------------------
+ Nested Loop
+ -> Seq Scan on xmldata
+ -> Table Function Scan on "xmltable"
+(3 rows)
+
+EXPLAIN (COSTS OFF, VERBOSE) SELECT * FROM xmltableview1;
+ QUERY PLAN
+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
+ Nested Loop
+ Output: "xmltable".id, "xmltable"._id, "xmltable".country_name, "xmltable".country_id, "xmltable".region_id, "xmltable".size, "xmltable".unit, "xmltable".premier_name
+ -> Seq Scan on public.xmldata
+ Output: xmldata.data
+ -> Table Function Scan on "xmltable"
+ Output: "xmltable".id, "xmltable"._id, "xmltable".country_name, "xmltable".country_id, "xmltable".region_id, "xmltable".size, "xmltable".unit, "xmltable".premier_name
+ Table Function Call: XMLTABLE(('/ROWS/ROW'::text) PASSING (xmldata.data) COLUMNS id integer PATH ('@id'::text), _id FOR ORDINALITY, country_name text PATH ('COUNTRY_NAME'::text) NOT NULL, country_id text PATH ('COUNTRY_ID'::text), region_id integer PATH ('REGION_ID'::text), size double precision PATH ('SIZE'::text), unit text PATH ('SIZE/@unit'::text), premier_name text DEFAULT ('not specified'::text) PATH ('PREMIER_NAME'::text))
+(7 rows)
+
+-- XMLNAMESPACES tests
+SELECT * FROM XMLTABLE(XMLNAMESPACES('http://x.y' AS zz),
+ '/zz:rows/zz:row'
+ PASSING '<rows xmlns="http://x.y"><row><a>10</a></row></rows>'
+ COLUMNS a int PATH 'zz:a');
+ERROR: unsupported XML feature
+LINE 3: PASSING '<rows xmlns="http://x.y"><row...
+ ^
+DETAIL: This functionality requires the server to be built with libxml support.
+HINT: You need to rebuild PostgreSQL using --with-libxml.
+CREATE VIEW xmltableview2 AS SELECT * FROM XMLTABLE(XMLNAMESPACES('http://x.y' AS zz),
+ '/zz:rows/zz:row'
+ PASSING '<rows xmlns="http://x.y"><row><a>10</a></row></rows>'
+ COLUMNS a int PATH 'zz:a');
+ERROR: unsupported XML feature
+LINE 3: PASSING '<rows xmlns="http://x.y"><row...
+ ^
+DETAIL: This functionality requires the server to be built with libxml support.
+HINT: You need to rebuild PostgreSQL using --with-libxml.
+SELECT * FROM xmltableview2;
+ERROR: relation "xmltableview2" does not exist
+LINE 1: SELECT * FROM xmltableview2;
+ ^
+SELECT * FROM XMLTABLE(XMLNAMESPACES(DEFAULT 'http://x.y'),
+ '/rows/row'
+ PASSING '<rows xmlns="http://x.y"><row><a>10</a></row></rows>'
+ COLUMNS a int PATH 'a');
+ERROR: unsupported XML feature
+LINE 3: PASSING '<rows xmlns="http://x.y"><row...
+ ^
+DETAIL: This functionality requires the server to be built with libxml support.
+HINT: You need to rebuild PostgreSQL using --with-libxml.
+-- used in prepare statements
+PREPARE pp AS
+SELECT xmltable.*
+ FROM (SELECT data FROM xmldata) x,
+ LATERAL XMLTABLE('/ROWS/ROW'
+ PASSING data
+ COLUMNS id int PATH '@id',
+ _id FOR ORDINALITY,
+ country_name text PATH 'COUNTRY_NAME' NOT NULL,
+ country_id text PATH 'COUNTRY_ID',
+ region_id int PATH 'REGION_ID',
+ size float PATH 'SIZE',
+ unit text PATH 'SIZE/@unit',
+ premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified');
+EXECUTE pp;
+ id | _id | country_name | country_id | region_id | size | unit | premier_name
+----+-----+--------------+------------+-----------+------+------+--------------
+(0 rows)
+
+SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS "COUNTRY_NAME" text, "REGION_ID" int);
+ COUNTRY_NAME | REGION_ID
+--------------+-----------
+(0 rows)
+
+SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id FOR ORDINALITY, "COUNTRY_NAME" text, "REGION_ID" int);
+ id | COUNTRY_NAME | REGION_ID
+----+--------------+-----------
+(0 rows)
+
+SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id int PATH '@id', "COUNTRY_NAME" text, "REGION_ID" int);
+ id | COUNTRY_NAME | REGION_ID
+----+--------------+-----------
+(0 rows)
+
+SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id int PATH '@id');
+ id
+----
+(0 rows)
+
+SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id FOR ORDINALITY);
+ id
+----
+(0 rows)
+
+SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id int PATH '@id', "COUNTRY_NAME" text, "REGION_ID" int, rawdata xml PATH '.');
+ id | COUNTRY_NAME | REGION_ID | rawdata
+----+--------------+-----------+---------
+(0 rows)
+
+SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id int PATH '@id', "COUNTRY_NAME" text, "REGION_ID" int, rawdata xml PATH './*');
+ id | COUNTRY_NAME | REGION_ID | rawdata
+----+--------------+-----------+---------
+(0 rows)
+
+SELECT * FROM xmltable('/root' passing '<root><element>a1a<!-- aaaa -->a2a<?aaaaa?> <!--z--> bbbb<x>xxx</x>cccc</element></root>' COLUMNS element text);
+ERROR: unsupported XML feature
+LINE 1: SELECT * FROM xmltable('/root' passing '<root><element>a1a<!...
+ ^
+DETAIL: This functionality requires the server to be built with libxml support.
+HINT: You need to rebuild PostgreSQL using --with-libxml.
+SELECT * FROM xmltable('/root' passing '<root><element>a1a<!-- aaaa -->a2a<?aaaaa?> <!--z--> bbbb<x>xxx</x>cccc</element></root>' COLUMNS element text PATH 'element/text()'); -- should fail
+ERROR: unsupported XML feature
+LINE 1: SELECT * FROM xmltable('/root' passing '<root><element>a1a<!...
+ ^
+DETAIL: This functionality requires the server to be built with libxml support.
+HINT: You need to rebuild PostgreSQL using --with-libxml.
+-- CDATA test
+select * from xmltable('r' passing '<d><r><c><![CDATA[<hello> &"<>!<a>foo</a>]]></c></r><r><c>2</c></r></d>' columns c text);
+ERROR: unsupported XML feature
+LINE 1: select * from xmltable('r' passing '<d><r><c><![CDATA[<hello...
+ ^
+DETAIL: This functionality requires the server to be built with libxml support.
+HINT: You need to rebuild PostgreSQL using --with-libxml.
+-- XML builtin entities
+SELECT * FROM xmltable('/x/a' PASSING '<x><a><ent>'</ent></a><a><ent>"</ent></a><a><ent>&</ent></a><a><ent><</ent></a><a><ent>></ent></a></x>' COLUMNS ent text);
+ERROR: unsupported XML feature
+LINE 1: SELECT * FROM xmltable('/x/a' PASSING '<x><a><ent>'</en...
+ ^
+DETAIL: This functionality requires the server to be built with libxml support.
+HINT: You need to rebuild PostgreSQL using --with-libxml.
+SELECT * FROM xmltable('/x/a' PASSING '<x><a><ent>'</ent></a><a><ent>"</ent></a><a><ent>&</ent></a><a><ent><</ent></a><a><ent>></ent></a></x>' COLUMNS ent xml);
+ERROR: unsupported XML feature
+LINE 1: SELECT * FROM xmltable('/x/a' PASSING '<x><a><ent>'</en...
+ ^
+DETAIL: This functionality requires the server to be built with libxml support.
+HINT: You need to rebuild PostgreSQL using --with-libxml.
+EXPLAIN (VERBOSE, COSTS OFF)
+SELECT xmltable.*
+ FROM (SELECT data FROM xmldata) x,
+ LATERAL XMLTABLE('/ROWS/ROW'
+ PASSING data
+ COLUMNS id int PATH '@id',
+ _id FOR ORDINALITY,
+ country_name text PATH 'COUNTRY_NAME' NOT NULL,
+ country_id text PATH 'COUNTRY_ID',
+ region_id int PATH 'REGION_ID',
+ size float PATH 'SIZE',
+ unit text PATH 'SIZE/@unit',
+ premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified');
+ QUERY PLAN
+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
+ Nested Loop
+ Output: "xmltable".id, "xmltable"._id, "xmltable".country_name, "xmltable".country_id, "xmltable".region_id, "xmltable".size, "xmltable".unit, "xmltable".premier_name
+ -> Seq Scan on public.xmldata
+ Output: xmldata.data
+ -> Table Function Scan on "xmltable"
+ Output: "xmltable".id, "xmltable"._id, "xmltable".country_name, "xmltable".country_id, "xmltable".region_id, "xmltable".size, "xmltable".unit, "xmltable".premier_name
+ Table Function Call: XMLTABLE(('/ROWS/ROW'::text) PASSING (xmldata.data) COLUMNS id integer PATH ('@id'::text), _id FOR ORDINALITY, country_name text PATH ('COUNTRY_NAME'::text) NOT NULL, country_id text PATH ('COUNTRY_ID'::text), region_id integer PATH ('REGION_ID'::text), size double precision PATH ('SIZE'::text), unit text PATH ('SIZE/@unit'::text), premier_name text DEFAULT ('not specified'::text) PATH ('PREMIER_NAME'::text))
+(7 rows)
+
+-- test qual
+SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS "COUNTRY_NAME" text, "REGION_ID" int) WHERE "COUNTRY_NAME" = 'Japan';
+ COUNTRY_NAME | REGION_ID
+--------------+-----------
+(0 rows)
+
+EXPLAIN (VERBOSE, COSTS OFF)
+SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS "COUNTRY_NAME" text, "REGION_ID" int) WHERE "COUNTRY_NAME" = 'Japan';
+ QUERY PLAN
+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
+ Nested Loop
+ Output: "xmltable"."COUNTRY_NAME", "xmltable"."REGION_ID"
+ -> Seq Scan on public.xmldata
+ Output: xmldata.data
+ -> Table Function Scan on "xmltable"
+ Output: "xmltable"."COUNTRY_NAME", "xmltable"."REGION_ID"
+ Table Function Call: XMLTABLE(('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]'::text) PASSING (xmldata.data) COLUMNS "COUNTRY_NAME" text, "REGION_ID" integer)
+ Filter: ("xmltable"."COUNTRY_NAME" = 'Japan'::text)
+(8 rows)
+
+-- should to work with more data
+INSERT INTO xmldata VALUES('<ROWS>
+<ROW id="10">
+ <COUNTRY_ID>CZ</COUNTRY_ID>
+ <COUNTRY_NAME>Czech Republic</COUNTRY_NAME>
+ <REGION_ID>2</REGION_ID><PREMIER_NAME>Milos Zeman</PREMIER_NAME>
+</ROW>
+<ROW id="11">
+ <COUNTRY_ID>DE</COUNTRY_ID>
+ <COUNTRY_NAME>Germany</COUNTRY_NAME>
+ <REGION_ID>2</REGION_ID>
+</ROW>
+<ROW id="12">
+ <COUNTRY_ID>FR</COUNTRY_ID>
+ <COUNTRY_NAME>France</COUNTRY_NAME>
+ <REGION_ID>2</REGION_ID>
+</ROW>
+</ROWS>');
+ERROR: unsupported XML feature
+LINE 1: INSERT INTO xmldata VALUES('<ROWS>
+ ^
+DETAIL: This functionality requires the server to be built with libxml support.
+HINT: You need to rebuild PostgreSQL using --with-libxml.
+INSERT INTO xmldata VALUES('<ROWS>
+<ROW id="20">
+ <COUNTRY_ID>EG</COUNTRY_ID>
+ <COUNTRY_NAME>Egypt</COUNTRY_NAME>
+ <REGION_ID>1</REGION_ID>
+</ROW>
+<ROW id="21">
+ <COUNTRY_ID>SD</COUNTRY_ID>
+ <COUNTRY_NAME>Sudan</COUNTRY_NAME>
+ <REGION_ID>1</REGION_ID>
+</ROW>
+</ROWS>');
+ERROR: unsupported XML feature
+LINE 1: INSERT INTO xmldata VALUES('<ROWS>
+ ^
+DETAIL: This functionality requires the server to be built with libxml support.
+HINT: You need to rebuild PostgreSQL using --with-libxml.
+SELECT xmltable.*
+ FROM (SELECT data FROM xmldata) x,
+ LATERAL XMLTABLE('/ROWS/ROW'
+ PASSING data
+ COLUMNS id int PATH '@id',
+ _id FOR ORDINALITY,
+ country_name text PATH 'COUNTRY_NAME' NOT NULL,
+ country_id text PATH 'COUNTRY_ID',
+ region_id int PATH 'REGION_ID',
+ size float PATH 'SIZE',
+ unit text PATH 'SIZE/@unit',
+ premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified');
+ id | _id | country_name | country_id | region_id | size | unit | premier_name
+----+-----+--------------+------------+-----------+------+------+--------------
+(0 rows)
+
+SELECT xmltable.*
+ FROM (SELECT data FROM xmldata) x,
+ LATERAL XMLTABLE('/ROWS/ROW'
+ PASSING data
+ COLUMNS id int PATH '@id',
+ _id FOR ORDINALITY,
+ country_name text PATH 'COUNTRY_NAME' NOT NULL,
+ country_id text PATH 'COUNTRY_ID',
+ region_id int PATH 'REGION_ID',
+ size float PATH 'SIZE',
+ unit text PATH 'SIZE/@unit',
+ premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified')
+ WHERE region_id = 2;
+ id | _id | country_name | country_id | region_id | size | unit | premier_name
+----+-----+--------------+------------+-----------+------+------+--------------
+(0 rows)
+
+EXPLAIN (VERBOSE, COSTS OFF)
+SELECT xmltable.*
+ FROM (SELECT data FROM xmldata) x,
+ LATERAL XMLTABLE('/ROWS/ROW'
+ PASSING data
+ COLUMNS id int PATH '@id',
+ _id FOR ORDINALITY,
+ country_name text PATH 'COUNTRY_NAME' NOT NULL,
+ country_id text PATH 'COUNTRY_ID',
+ region_id int PATH 'REGION_ID',
+ size float PATH 'SIZE',
+ unit text PATH 'SIZE/@unit',
+ premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified')
+ WHERE region_id = 2;
+ QUERY PLAN
+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
+ Nested Loop
+ Output: "xmltable".id, "xmltable"._id, "xmltable".country_name, "xmltable".country_id, "xmltable".region_id, "xmltable".size, "xmltable".unit, "xmltable".premier_name
+ -> Seq Scan on public.xmldata
+ Output: xmldata.data
+ -> Table Function Scan on "xmltable"
+ Output: "xmltable".id, "xmltable"._id, "xmltable".country_name, "xmltable".country_id, "xmltable".region_id, "xmltable".size, "xmltable".unit, "xmltable".premier_name
+ Table Function Call: XMLTABLE(('/ROWS/ROW'::text) PASSING (xmldata.data) COLUMNS id integer PATH ('@id'::text), _id FOR ORDINALITY, country_name text PATH ('COUNTRY_NAME'::text) NOT NULL, country_id text PATH ('COUNTRY_ID'::text), region_id integer PATH ('REGION_ID'::text), size double precision PATH ('SIZE'::text), unit text PATH ('SIZE/@unit'::text), premier_name text DEFAULT ('not specified'::text) PATH ('PREMIER_NAME'::text))
+ Filter: ("xmltable".region_id = 2)
+(8 rows)
+
+-- should fail, NULL value
+SELECT xmltable.*
+ FROM (SELECT data FROM xmldata) x,
+ LATERAL XMLTABLE('/ROWS/ROW'
+ PASSING data
+ COLUMNS id int PATH '@id',
+ _id FOR ORDINALITY,
+ country_name text PATH 'COUNTRY_NAME' NOT NULL,
+ country_id text PATH 'COUNTRY_ID',
+ region_id int PATH 'REGION_ID',
+ size float PATH 'SIZE' NOT NULL,
+ unit text PATH 'SIZE/@unit',
+ premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified');
+ id | _id | country_name | country_id | region_id | size | unit | premier_name
+----+-----+--------------+------------+-----------+------+------+--------------
+(0 rows)
+
+-- if all is ok, then result is empty
+-- one line xml test
+WITH
+ x AS (SELECT proname, proowner, procost::numeric, pronargs,
+ array_to_string(proargnames,',') as proargnames,
+ case when proargtypes <> '' then array_to_string(proargtypes::oid[],',') end as proargtypes
+ FROM pg_proc WHERE proname = 'f_leak'),
+ y AS (SELECT xmlelement(name proc,
+ xmlforest(proname, proowner,
+ procost, pronargs,
+ proargnames, proargtypes)) as proc
+ FROM x),
+ z AS (SELECT xmltable.*
+ FROM y,
+ LATERAL xmltable('/proc' PASSING proc
+ COLUMNS proname name,
+ proowner oid,
+ procost float,
+ pronargs int,
+ proargnames text,
+ proargtypes text))
+ SELECT * FROM z
+ EXCEPT SELECT * FROM x;
+ERROR: unsupported XML feature
+DETAIL: This functionality requires the server to be built with libxml support.
+HINT: You need to rebuild PostgreSQL using --with-libxml.
+-- multi line xml test, result should be empty too
+WITH
+ x AS (SELECT proname, proowner, procost::numeric, pronargs,
+ array_to_string(proargnames,',') as proargnames,
+ case when proargtypes <> '' then array_to_string(proargtypes::oid[],',') end as proargtypes
+ FROM pg_proc),
+ y AS (SELECT xmlelement(name data,
+ xmlagg(xmlelement(name proc,
+ xmlforest(proname, proowner, procost,
+ pronargs, proargnames, proargtypes)))) as doc
+ FROM x),
+ z AS (SELECT xmltable.*
+ FROM y,
+ LATERAL xmltable('/data/proc' PASSING doc
+ COLUMNS proname name,
+ proowner oid,
+ procost float,
+ pronargs int,
+ proargnames text,
+ proargtypes text))
+ SELECT * FROM z
+ EXCEPT SELECT * FROM x;
+ERROR: unsupported XML feature
+DETAIL: This functionality requires the server to be built with libxml support.
+HINT: You need to rebuild PostgreSQL using --with-libxml.
+CREATE TABLE xmltest2(x xml, _path text);
+INSERT INTO xmltest2 VALUES('<d><r><ac>1</ac></r></d>', 'A');
+ERROR: unsupported XML feature
+LINE 1: INSERT INTO xmltest2 VALUES('<d><r><ac>1</ac></r></d>', 'A')...
+ ^
+DETAIL: This functionality requires the server to be built with libxml support.
+HINT: You need to rebuild PostgreSQL using --with-libxml.
+INSERT INTO xmltest2 VALUES('<d><r><bc>2</bc></r></d>', 'B');
+ERROR: unsupported XML feature
+LINE 1: INSERT INTO xmltest2 VALUES('<d><r><bc>2</bc></r></d>', 'B')...
+ ^
+DETAIL: This functionality requires the server to be built with libxml support.
+HINT: You need to rebuild PostgreSQL using --with-libxml.
+INSERT INTO xmltest2 VALUES('<d><r><cc>3</cc></r></d>', 'C');
+ERROR: unsupported XML feature
+LINE 1: INSERT INTO xmltest2 VALUES('<d><r><cc>3</cc></r></d>', 'C')...
+ ^
+DETAIL: This functionality requires the server to be built with libxml support.
+HINT: You need to rebuild PostgreSQL using --with-libxml.
+INSERT INTO xmltest2 VALUES('<d><r><dc>2</dc></r></d>', 'D');
+ERROR: unsupported XML feature
+LINE 1: INSERT INTO xmltest2 VALUES('<d><r><dc>2</dc></r></d>', 'D')...
+ ^
+DETAIL: This functionality requires the server to be built with libxml support.
+HINT: You need to rebuild PostgreSQL using --with-libxml.
+SELECT xmltable.* FROM xmltest2, LATERAL xmltable('/d/r' PASSING x COLUMNS a int PATH '' || lower(_path) || 'c');
+ a
+---
+(0 rows)
+
+SELECT xmltable.* FROM xmltest2, LATERAL xmltable(('/d/r/' || lower(_path) || 'c') PASSING x COLUMNS a int PATH '.');
+ a
+---
+(0 rows)
+
+SELECT xmltable.* FROM xmltest2, LATERAL xmltable(('/d/r/' || lower(_path) || 'c') PASSING x COLUMNS a int PATH 'x' DEFAULT ascii(_path) - 54);
+ a
+---
+(0 rows)
+
<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN" "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd"><chapter> </chapter>
(1 row)
+-- XMLPATH tests
+CREATE TABLE xmldata(data xml);
+INSERT INTO xmldata VALUES('<ROWS>
+<ROW id="1">
+ <COUNTRY_ID>AU</COUNTRY_ID>
+ <COUNTRY_NAME>Australia</COUNTRY_NAME>
+ <REGION_ID>3</REGION_ID>
+</ROW>
+<ROW id="2">
+ <COUNTRY_ID>CN</COUNTRY_ID>
+ <COUNTRY_NAME>China</COUNTRY_NAME>
+ <REGION_ID>3</REGION_ID>
+</ROW>
+<ROW id="3">
+ <COUNTRY_ID>HK</COUNTRY_ID>
+ <COUNTRY_NAME>HongKong</COUNTRY_NAME>
+ <REGION_ID>3</REGION_ID>
+</ROW>
+<ROW id="4">
+ <COUNTRY_ID>IN</COUNTRY_ID>
+ <COUNTRY_NAME>India</COUNTRY_NAME>
+ <REGION_ID>3</REGION_ID>
+</ROW>
+<ROW id="5">
+ <COUNTRY_ID>JP</COUNTRY_ID>
+ <COUNTRY_NAME>Japan</COUNTRY_NAME>
+ <REGION_ID>3</REGION_ID><PREMIER_NAME>Sinzo Abe</PREMIER_NAME>
+</ROW>
+<ROW id="6">
+ <COUNTRY_ID>SG</COUNTRY_ID>
+ <COUNTRY_NAME>Singapore</COUNTRY_NAME>
+ <REGION_ID>3</REGION_ID><SIZE unit="km">791</SIZE>
+</ROW>
+</ROWS>');
+-- XMLTABLE with columns
+SELECT xmltable.*
+ FROM (SELECT data FROM xmldata) x,
+ LATERAL XMLTABLE('/ROWS/ROW'
+ PASSING data
+ COLUMNS id int PATH '@id',
+ _id FOR ORDINALITY,
+ country_name text PATH 'COUNTRY_NAME' NOT NULL,
+ country_id text PATH 'COUNTRY_ID',
+ region_id int PATH 'REGION_ID',
+ size float PATH 'SIZE',
+ unit text PATH 'SIZE/@unit',
+ premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified');
+ id | _id | country_name | country_id | region_id | size | unit | premier_name
+----+-----+--------------+------------+-----------+------+------+---------------
+ 1 | 1 | Australia | AU | 3 | | | not specified
+ 2 | 2 | China | CN | 3 | | | not specified
+ 3 | 3 | HongKong | HK | 3 | | | not specified
+ 4 | 4 | India | IN | 3 | | | not specified
+ 5 | 5 | Japan | JP | 3 | | | Sinzo Abe
+ 6 | 6 | Singapore | SG | 3 | 791 | km | not specified
+(6 rows)
+
+CREATE VIEW xmltableview1 AS SELECT xmltable.*
+ FROM (SELECT data FROM xmldata) x,
+ LATERAL XMLTABLE('/ROWS/ROW'
+ PASSING data
+ COLUMNS id int PATH '@id',
+ _id FOR ORDINALITY,
+ country_name text PATH 'COUNTRY_NAME' NOT NULL,
+ country_id text PATH 'COUNTRY_ID',
+ region_id int PATH 'REGION_ID',
+ size float PATH 'SIZE',
+ unit text PATH 'SIZE/@unit',
+ premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified');
+SELECT * FROM xmltableview1;
+ id | _id | country_name | country_id | region_id | size | unit | premier_name
+----+-----+--------------+------------+-----------+------+------+---------------
+ 1 | 1 | Australia | AU | 3 | | | not specified
+ 2 | 2 | China | CN | 3 | | | not specified
+ 3 | 3 | HongKong | HK | 3 | | | not specified
+ 4 | 4 | India | IN | 3 | | | not specified
+ 5 | 5 | Japan | JP | 3 | | | Sinzo Abe
+ 6 | 6 | Singapore | SG | 3 | 791 | km | not specified
+(6 rows)
+
+\sv xmltableview1
+CREATE OR REPLACE VIEW public.xmltableview1 AS
+ SELECT "xmltable".id,
+ "xmltable"._id,
+ "xmltable".country_name,
+ "xmltable".country_id,
+ "xmltable".region_id,
+ "xmltable".size,
+ "xmltable".unit,
+ "xmltable".premier_name
+ FROM ( SELECT xmldata.data
+ FROM xmldata) x,
+ LATERAL XMLTABLE(('/ROWS/ROW'::text) PASSING (x.data) COLUMNS id integer PATH ('@id'::text), _id FOR ORDINALITY, country_name text PATH ('COUNTRY_NAME'::text) NOT NULL, country_id text PATH ('COUNTRY_ID'::text), region_id integer PATH ('REGION_ID'::text), size double precision PATH ('SIZE'::text), unit text PATH ('SIZE/@unit'::text), premier_name text DEFAULT ('not specified'::text) PATH ('PREMIER_NAME'::text))
+EXPLAIN (COSTS OFF) SELECT * FROM xmltableview1;
+ QUERY PLAN
+-----------------------------------------
+ Nested Loop
+ -> Seq Scan on xmldata
+ -> Table Function Scan on "xmltable"
+(3 rows)
+
+EXPLAIN (COSTS OFF, VERBOSE) SELECT * FROM xmltableview1;
+ QUERY PLAN
+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
+ Nested Loop
+ Output: "xmltable".id, "xmltable"._id, "xmltable".country_name, "xmltable".country_id, "xmltable".region_id, "xmltable".size, "xmltable".unit, "xmltable".premier_name
+ -> Seq Scan on public.xmldata
+ Output: xmldata.data
+ -> Table Function Scan on "xmltable"
+ Output: "xmltable".id, "xmltable"._id, "xmltable".country_name, "xmltable".country_id, "xmltable".region_id, "xmltable".size, "xmltable".unit, "xmltable".premier_name
+ Table Function Call: XMLTABLE(('/ROWS/ROW'::text) PASSING (xmldata.data) COLUMNS id integer PATH ('@id'::text), _id FOR ORDINALITY, country_name text PATH ('COUNTRY_NAME'::text) NOT NULL, country_id text PATH ('COUNTRY_ID'::text), region_id integer PATH ('REGION_ID'::text), size double precision PATH ('SIZE'::text), unit text PATH ('SIZE/@unit'::text), premier_name text DEFAULT ('not specified'::text) PATH ('PREMIER_NAME'::text))
+(7 rows)
+
+-- XMLNAMESPACES tests
+SELECT * FROM XMLTABLE(XMLNAMESPACES('http://x.y' AS zz),
+ '/zz:rows/zz:row'
+ PASSING '<rows xmlns="http://x.y"><row><a>10</a></row></rows>'
+ COLUMNS a int PATH 'zz:a');
+ a
+----
+ 10
+(1 row)
+
+CREATE VIEW xmltableview2 AS SELECT * FROM XMLTABLE(XMLNAMESPACES('http://x.y' AS zz),
+ '/zz:rows/zz:row'
+ PASSING '<rows xmlns="http://x.y"><row><a>10</a></row></rows>'
+ COLUMNS a int PATH 'zz:a');
+SELECT * FROM xmltableview2;
+ a
+----
+ 10
+(1 row)
+
+SELECT * FROM XMLTABLE(XMLNAMESPACES(DEFAULT 'http://x.y'),
+ '/rows/row'
+ PASSING '<rows xmlns="http://x.y"><row><a>10</a></row></rows>'
+ COLUMNS a int PATH 'a');
+ERROR: DEFAULT namespace is not supported
+-- used in prepare statements
+PREPARE pp AS
+SELECT xmltable.*
+ FROM (SELECT data FROM xmldata) x,
+ LATERAL XMLTABLE('/ROWS/ROW'
+ PASSING data
+ COLUMNS id int PATH '@id',
+ _id FOR ORDINALITY,
+ country_name text PATH 'COUNTRY_NAME' NOT NULL,
+ country_id text PATH 'COUNTRY_ID',
+ region_id int PATH 'REGION_ID',
+ size float PATH 'SIZE',
+ unit text PATH 'SIZE/@unit',
+ premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified');
+EXECUTE pp;
+ id | _id | country_name | country_id | region_id | size | unit | premier_name
+----+-----+--------------+------------+-----------+------+------+---------------
+ 1 | 1 | Australia | AU | 3 | | | not specified
+ 2 | 2 | China | CN | 3 | | | not specified
+ 3 | 3 | HongKong | HK | 3 | | | not specified
+ 4 | 4 | India | IN | 3 | | | not specified
+ 5 | 5 | Japan | JP | 3 | | | Sinzo Abe
+ 6 | 6 | Singapore | SG | 3 | 791 | km | not specified
+(6 rows)
+
+SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS "COUNTRY_NAME" text, "REGION_ID" int);
+ COUNTRY_NAME | REGION_ID
+--------------+-----------
+ India | 3
+ Japan | 3
+(2 rows)
+
+SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id FOR ORDINALITY, "COUNTRY_NAME" text, "REGION_ID" int);
+ id | COUNTRY_NAME | REGION_ID
+----+--------------+-----------
+ 1 | India | 3
+ 2 | Japan | 3
+(2 rows)
+
+SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id int PATH '@id', "COUNTRY_NAME" text, "REGION_ID" int);
+ id | COUNTRY_NAME | REGION_ID
+----+--------------+-----------
+ 4 | India | 3
+ 5 | Japan | 3
+(2 rows)
+
+SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id int PATH '@id');
+ id
+----
+ 4
+ 5
+(2 rows)
+
+SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id FOR ORDINALITY);
+ id
+----
+ 1
+ 2
+(2 rows)
+
+SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id int PATH '@id', "COUNTRY_NAME" text, "REGION_ID" int, rawdata xml PATH '.');
+ id | COUNTRY_NAME | REGION_ID | rawdata
+----+--------------+-----------+------------------------------------------------------------------
+ 4 | India | 3 | <ROW id="4"> +
+ | | | <COUNTRY_ID>IN</COUNTRY_ID> +
+ | | | <COUNTRY_NAME>India</COUNTRY_NAME> +
+ | | | <REGION_ID>3</REGION_ID> +
+ | | | </ROW>
+ 5 | Japan | 3 | <ROW id="5"> +
+ | | | <COUNTRY_ID>JP</COUNTRY_ID> +
+ | | | <COUNTRY_NAME>Japan</COUNTRY_NAME> +
+ | | | <REGION_ID>3</REGION_ID><PREMIER_NAME>Sinzo Abe</PREMIER_NAME>+
+ | | | </ROW>
+(2 rows)
+
+SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id int PATH '@id', "COUNTRY_NAME" text, "REGION_ID" int, rawdata xml PATH './*');
+ id | COUNTRY_NAME | REGION_ID | rawdata
+----+--------------+-----------+-----------------------------------------------------------------------------------------------------------------------------
+ 4 | India | 3 | <COUNTRY_ID>IN</COUNTRY_ID><COUNTRY_NAME>India</COUNTRY_NAME><REGION_ID>3</REGION_ID>
+ 5 | Japan | 3 | <COUNTRY_ID>JP</COUNTRY_ID><COUNTRY_NAME>Japan</COUNTRY_NAME><REGION_ID>3</REGION_ID><PREMIER_NAME>Sinzo Abe</PREMIER_NAME>
+(2 rows)
+
+SELECT * FROM xmltable('/root' passing '<root><element>a1a<!-- aaaa -->a2a<?aaaaa?> <!--z--> bbbb<x>xxx</x>cccc</element></root>' COLUMNS element text);
+ element
+-------------------
+ a1aa2a bbbbcccc
+(1 row)
+
+SELECT * FROM xmltable('/root' passing '<root><element>a1a<!-- aaaa -->a2a<?aaaaa?> <!--z--> bbbb<x>xxx</x>cccc</element></root>' COLUMNS element text PATH 'element/text()'); -- should fail
+ERROR: more than one value returned by column XPath expression
+-- CDATA test
+select * from xmltable('r' passing '<d><r><c><![CDATA[<hello> &"<>!<a>foo</a>]]></c></r><r><c>2</c></r></d>' columns c text);
+ c
+-------------------------
+ <hello> &"<>!<a>foo</a>
+ 2
+(2 rows)
+
+-- XML builtin entities
+SELECT * FROM xmltable('/x/a' PASSING '<x><a><ent>'</ent></a><a><ent>"</ent></a><a><ent>&</ent></a><a><ent><</ent></a><a><ent>></ent></a></x>' COLUMNS ent text);
+ ent
+-----
+ '
+ "
+ &
+ <
+ >
+(5 rows)
+
+SELECT * FROM xmltable('/x/a' PASSING '<x><a><ent>'</ent></a><a><ent>"</ent></a><a><ent>&</ent></a><a><ent><</ent></a><a><ent>></ent></a></x>' COLUMNS ent xml);
+ ent
+------------------
+ <ent>'</ent>
+ <ent>"</ent>
+ <ent>&</ent>
+ <ent><</ent>
+ <ent>></ent>
+(5 rows)
+
+EXPLAIN (VERBOSE, COSTS OFF)
+SELECT xmltable.*
+ FROM (SELECT data FROM xmldata) x,
+ LATERAL XMLTABLE('/ROWS/ROW'
+ PASSING data
+ COLUMNS id int PATH '@id',
+ _id FOR ORDINALITY,
+ country_name text PATH 'COUNTRY_NAME' NOT NULL,
+ country_id text PATH 'COUNTRY_ID',
+ region_id int PATH 'REGION_ID',
+ size float PATH 'SIZE',
+ unit text PATH 'SIZE/@unit',
+ premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified');
+ QUERY PLAN
+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
+ Nested Loop
+ Output: "xmltable".id, "xmltable"._id, "xmltable".country_name, "xmltable".country_id, "xmltable".region_id, "xmltable".size, "xmltable".unit, "xmltable".premier_name
+ -> Seq Scan on public.xmldata
+ Output: xmldata.data
+ -> Table Function Scan on "xmltable"
+ Output: "xmltable".id, "xmltable"._id, "xmltable".country_name, "xmltable".country_id, "xmltable".region_id, "xmltable".size, "xmltable".unit, "xmltable".premier_name
+ Table Function Call: XMLTABLE(('/ROWS/ROW'::text) PASSING (xmldata.data) COLUMNS id integer PATH ('@id'::text), _id FOR ORDINALITY, country_name text PATH ('COUNTRY_NAME'::text) NOT NULL, country_id text PATH ('COUNTRY_ID'::text), region_id integer PATH ('REGION_ID'::text), size double precision PATH ('SIZE'::text), unit text PATH ('SIZE/@unit'::text), premier_name text DEFAULT ('not specified'::text) PATH ('PREMIER_NAME'::text))
+(7 rows)
+
+-- test qual
+SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS "COUNTRY_NAME" text, "REGION_ID" int) WHERE "COUNTRY_NAME" = 'Japan';
+ COUNTRY_NAME | REGION_ID
+--------------+-----------
+ Japan | 3
+(1 row)
+
+EXPLAIN (VERBOSE, COSTS OFF)
+SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS "COUNTRY_NAME" text, "REGION_ID" int) WHERE "COUNTRY_NAME" = 'Japan';
+ QUERY PLAN
+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
+ Nested Loop
+ Output: "xmltable"."COUNTRY_NAME", "xmltable"."REGION_ID"
+ -> Seq Scan on public.xmldata
+ Output: xmldata.data
+ -> Table Function Scan on "xmltable"
+ Output: "xmltable"."COUNTRY_NAME", "xmltable"."REGION_ID"
+ Table Function Call: XMLTABLE(('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]'::text) PASSING (xmldata.data) COLUMNS "COUNTRY_NAME" text, "REGION_ID" integer)
+ Filter: ("xmltable"."COUNTRY_NAME" = 'Japan'::text)
+(8 rows)
+
+-- should to work with more data
+INSERT INTO xmldata VALUES('<ROWS>
+<ROW id="10">
+ <COUNTRY_ID>CZ</COUNTRY_ID>
+ <COUNTRY_NAME>Czech Republic</COUNTRY_NAME>
+ <REGION_ID>2</REGION_ID><PREMIER_NAME>Milos Zeman</PREMIER_NAME>
+</ROW>
+<ROW id="11">
+ <COUNTRY_ID>DE</COUNTRY_ID>
+ <COUNTRY_NAME>Germany</COUNTRY_NAME>
+ <REGION_ID>2</REGION_ID>
+</ROW>
+<ROW id="12">
+ <COUNTRY_ID>FR</COUNTRY_ID>
+ <COUNTRY_NAME>France</COUNTRY_NAME>
+ <REGION_ID>2</REGION_ID>
+</ROW>
+</ROWS>');
+INSERT INTO xmldata VALUES('<ROWS>
+<ROW id="20">
+ <COUNTRY_ID>EG</COUNTRY_ID>
+ <COUNTRY_NAME>Egypt</COUNTRY_NAME>
+ <REGION_ID>1</REGION_ID>
+</ROW>
+<ROW id="21">
+ <COUNTRY_ID>SD</COUNTRY_ID>
+ <COUNTRY_NAME>Sudan</COUNTRY_NAME>
+ <REGION_ID>1</REGION_ID>
+</ROW>
+</ROWS>');
+SELECT xmltable.*
+ FROM (SELECT data FROM xmldata) x,
+ LATERAL XMLTABLE('/ROWS/ROW'
+ PASSING data
+ COLUMNS id int PATH '@id',
+ _id FOR ORDINALITY,
+ country_name text PATH 'COUNTRY_NAME' NOT NULL,
+ country_id text PATH 'COUNTRY_ID',
+ region_id int PATH 'REGION_ID',
+ size float PATH 'SIZE',
+ unit text PATH 'SIZE/@unit',
+ premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified');
+ id | _id | country_name | country_id | region_id | size | unit | premier_name
+----+-----+----------------+------------+-----------+------+------+---------------
+ 1 | 1 | Australia | AU | 3 | | | not specified
+ 2 | 2 | China | CN | 3 | | | not specified
+ 3 | 3 | HongKong | HK | 3 | | | not specified
+ 4 | 4 | India | IN | 3 | | | not specified
+ 5 | 5 | Japan | JP | 3 | | | Sinzo Abe
+ 6 | 6 | Singapore | SG | 3 | 791 | km | not specified
+ 10 | 1 | Czech Republic | CZ | 2 | | | Milos Zeman
+ 11 | 2 | Germany | DE | 2 | | | not specified
+ 12 | 3 | France | FR | 2 | | | not specified
+ 20 | 1 | Egypt | EG | 1 | | | not specified
+ 21 | 2 | Sudan | SD | 1 | | | not specified
+(11 rows)
+
+SELECT xmltable.*
+ FROM (SELECT data FROM xmldata) x,
+ LATERAL XMLTABLE('/ROWS/ROW'
+ PASSING data
+ COLUMNS id int PATH '@id',
+ _id FOR ORDINALITY,
+ country_name text PATH 'COUNTRY_NAME' NOT NULL,
+ country_id text PATH 'COUNTRY_ID',
+ region_id int PATH 'REGION_ID',
+ size float PATH 'SIZE',
+ unit text PATH 'SIZE/@unit',
+ premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified')
+ WHERE region_id = 2;
+ id | _id | country_name | country_id | region_id | size | unit | premier_name
+----+-----+----------------+------------+-----------+------+------+---------------
+ 10 | 1 | Czech Republic | CZ | 2 | | | Milos Zeman
+ 11 | 2 | Germany | DE | 2 | | | not specified
+ 12 | 3 | France | FR | 2 | | | not specified
+(3 rows)
+
+EXPLAIN (VERBOSE, COSTS OFF)
+SELECT xmltable.*
+ FROM (SELECT data FROM xmldata) x,
+ LATERAL XMLTABLE('/ROWS/ROW'
+ PASSING data
+ COLUMNS id int PATH '@id',
+ _id FOR ORDINALITY,
+ country_name text PATH 'COUNTRY_NAME' NOT NULL,
+ country_id text PATH 'COUNTRY_ID',
+ region_id int PATH 'REGION_ID',
+ size float PATH 'SIZE',
+ unit text PATH 'SIZE/@unit',
+ premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified')
+ WHERE region_id = 2;
+ QUERY PLAN
+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
+ Nested Loop
+ Output: "xmltable".id, "xmltable"._id, "xmltable".country_name, "xmltable".country_id, "xmltable".region_id, "xmltable".size, "xmltable".unit, "xmltable".premier_name
+ -> Seq Scan on public.xmldata
+ Output: xmldata.data
+ -> Table Function Scan on "xmltable"
+ Output: "xmltable".id, "xmltable"._id, "xmltable".country_name, "xmltable".country_id, "xmltable".region_id, "xmltable".size, "xmltable".unit, "xmltable".premier_name
+ Table Function Call: XMLTABLE(('/ROWS/ROW'::text) PASSING (xmldata.data) COLUMNS id integer PATH ('@id'::text), _id FOR ORDINALITY, country_name text PATH ('COUNTRY_NAME'::text) NOT NULL, country_id text PATH ('COUNTRY_ID'::text), region_id integer PATH ('REGION_ID'::text), size double precision PATH ('SIZE'::text), unit text PATH ('SIZE/@unit'::text), premier_name text DEFAULT ('not specified'::text) PATH ('PREMIER_NAME'::text))
+ Filter: ("xmltable".region_id = 2)
+(8 rows)
+
+-- should fail, NULL value
+SELECT xmltable.*
+ FROM (SELECT data FROM xmldata) x,
+ LATERAL XMLTABLE('/ROWS/ROW'
+ PASSING data
+ COLUMNS id int PATH '@id',
+ _id FOR ORDINALITY,
+ country_name text PATH 'COUNTRY_NAME' NOT NULL,
+ country_id text PATH 'COUNTRY_ID',
+ region_id int PATH 'REGION_ID',
+ size float PATH 'SIZE' NOT NULL,
+ unit text PATH 'SIZE/@unit',
+ premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified');
+ERROR: null is not allowed in column "size"
+-- if all is ok, then result is empty
+-- one line xml test
+WITH
+ x AS (SELECT proname, proowner, procost::numeric, pronargs,
+ array_to_string(proargnames,',') as proargnames,
+ case when proargtypes <> '' then array_to_string(proargtypes::oid[],',') end as proargtypes
+ FROM pg_proc WHERE proname = 'f_leak'),
+ y AS (SELECT xmlelement(name proc,
+ xmlforest(proname, proowner,
+ procost, pronargs,
+ proargnames, proargtypes)) as proc
+ FROM x),
+ z AS (SELECT xmltable.*
+ FROM y,
+ LATERAL xmltable('/proc' PASSING proc
+ COLUMNS proname name,
+ proowner oid,
+ procost float,
+ pronargs int,
+ proargnames text,
+ proargtypes text))
+ SELECT * FROM z
+ EXCEPT SELECT * FROM x;
+ proname | proowner | procost | pronargs | proargnames | proargtypes
+---------+----------+---------+----------+-------------+-------------
+(0 rows)
+
+-- multi line xml test, result should be empty too
+WITH
+ x AS (SELECT proname, proowner, procost::numeric, pronargs,
+ array_to_string(proargnames,',') as proargnames,
+ case when proargtypes <> '' then array_to_string(proargtypes::oid[],',') end as proargtypes
+ FROM pg_proc),
+ y AS (SELECT xmlelement(name data,
+ xmlagg(xmlelement(name proc,
+ xmlforest(proname, proowner, procost,
+ pronargs, proargnames, proargtypes)))) as doc
+ FROM x),
+ z AS (SELECT xmltable.*
+ FROM y,
+ LATERAL xmltable('/data/proc' PASSING doc
+ COLUMNS proname name,
+ proowner oid,
+ procost float,
+ pronargs int,
+ proargnames text,
+ proargtypes text))
+ SELECT * FROM z
+ EXCEPT SELECT * FROM x;
+ proname | proowner | procost | pronargs | proargnames | proargtypes
+---------+----------+---------+----------+-------------+-------------
+(0 rows)
+
+CREATE TABLE xmltest2(x xml, _path text);
+INSERT INTO xmltest2 VALUES('<d><r><ac>1</ac></r></d>', 'A');
+INSERT INTO xmltest2 VALUES('<d><r><bc>2</bc></r></d>', 'B');
+INSERT INTO xmltest2 VALUES('<d><r><cc>3</cc></r></d>', 'C');
+INSERT INTO xmltest2 VALUES('<d><r><dc>2</dc></r></d>', 'D');
+SELECT xmltable.* FROM xmltest2, LATERAL xmltable('/d/r' PASSING x COLUMNS a int PATH '' || lower(_path) || 'c');
+ a
+---
+ 1
+ 2
+ 3
+ 2
+(4 rows)
+
+SELECT xmltable.* FROM xmltest2, LATERAL xmltable(('/d/r/' || lower(_path) || 'c') PASSING x COLUMNS a int PATH '.');
+ a
+---
+ 1
+ 2
+ 3
+ 2
+(4 rows)
+
+SELECT xmltable.* FROM xmltest2, LATERAL xmltable(('/d/r/' || lower(_path) || 'c') PASSING x COLUMNS a int PATH 'x' DEFAULT ascii(_path) - 54);
+ a
+----
+ 11
+ 12
+ 13
+ 14
+(4 rows)
+
SELECT XMLPARSE(DOCUMENT '<!DOCTYPE foo [<!ENTITY c SYSTEM "/etc/no.such.file">]><foo>&c;</foo>');
-- This might or might not load the requested DTD, but it mustn't throw error.
SELECT XMLPARSE(DOCUMENT '<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN" "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd"><chapter> </chapter>');
+
+-- XMLPATH tests
+CREATE TABLE xmldata(data xml);
+INSERT INTO xmldata VALUES('<ROWS>
+<ROW id="1">
+ <COUNTRY_ID>AU</COUNTRY_ID>
+ <COUNTRY_NAME>Australia</COUNTRY_NAME>
+ <REGION_ID>3</REGION_ID>
+</ROW>
+<ROW id="2">
+ <COUNTRY_ID>CN</COUNTRY_ID>
+ <COUNTRY_NAME>China</COUNTRY_NAME>
+ <REGION_ID>3</REGION_ID>
+</ROW>
+<ROW id="3">
+ <COUNTRY_ID>HK</COUNTRY_ID>
+ <COUNTRY_NAME>HongKong</COUNTRY_NAME>
+ <REGION_ID>3</REGION_ID>
+</ROW>
+<ROW id="4">
+ <COUNTRY_ID>IN</COUNTRY_ID>
+ <COUNTRY_NAME>India</COUNTRY_NAME>
+ <REGION_ID>3</REGION_ID>
+</ROW>
+<ROW id="5">
+ <COUNTRY_ID>JP</COUNTRY_ID>
+ <COUNTRY_NAME>Japan</COUNTRY_NAME>
+ <REGION_ID>3</REGION_ID><PREMIER_NAME>Sinzo Abe</PREMIER_NAME>
+</ROW>
+<ROW id="6">
+ <COUNTRY_ID>SG</COUNTRY_ID>
+ <COUNTRY_NAME>Singapore</COUNTRY_NAME>
+ <REGION_ID>3</REGION_ID><SIZE unit="km">791</SIZE>
+</ROW>
+</ROWS>');
+
+-- XMLTABLE with columns
+SELECT xmltable.*
+ FROM (SELECT data FROM xmldata) x,
+ LATERAL XMLTABLE('/ROWS/ROW'
+ PASSING data
+ COLUMNS id int PATH '@id',
+ _id FOR ORDINALITY,
+ country_name text PATH 'COUNTRY_NAME' NOT NULL,
+ country_id text PATH 'COUNTRY_ID',
+ region_id int PATH 'REGION_ID',
+ size float PATH 'SIZE',
+ unit text PATH 'SIZE/@unit',
+ premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified');
+
+CREATE VIEW xmltableview1 AS SELECT xmltable.*
+ FROM (SELECT data FROM xmldata) x,
+ LATERAL XMLTABLE('/ROWS/ROW'
+ PASSING data
+ COLUMNS id int PATH '@id',
+ _id FOR ORDINALITY,
+ country_name text PATH 'COUNTRY_NAME' NOT NULL,
+ country_id text PATH 'COUNTRY_ID',
+ region_id int PATH 'REGION_ID',
+ size float PATH 'SIZE',
+ unit text PATH 'SIZE/@unit',
+ premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified');
+
+SELECT * FROM xmltableview1;
+
+\sv xmltableview1
+
+EXPLAIN (COSTS OFF) SELECT * FROM xmltableview1;
+EXPLAIN (COSTS OFF, VERBOSE) SELECT * FROM xmltableview1;
+
+-- XMLNAMESPACES tests
+SELECT * FROM XMLTABLE(XMLNAMESPACES('http://x.y' AS zz),
+ '/zz:rows/zz:row'
+ PASSING '<rows xmlns="http://x.y"><row><a>10</a></row></rows>'
+ COLUMNS a int PATH 'zz:a');
+
+CREATE VIEW xmltableview2 AS SELECT * FROM XMLTABLE(XMLNAMESPACES('http://x.y' AS zz),
+ '/zz:rows/zz:row'
+ PASSING '<rows xmlns="http://x.y"><row><a>10</a></row></rows>'
+ COLUMNS a int PATH 'zz:a');
+
+SELECT * FROM xmltableview2;
+
+SELECT * FROM XMLTABLE(XMLNAMESPACES(DEFAULT 'http://x.y'),
+ '/rows/row'
+ PASSING '<rows xmlns="http://x.y"><row><a>10</a></row></rows>'
+ COLUMNS a int PATH 'a');
+
+-- used in prepare statements
+PREPARE pp AS
+SELECT xmltable.*
+ FROM (SELECT data FROM xmldata) x,
+ LATERAL XMLTABLE('/ROWS/ROW'
+ PASSING data
+ COLUMNS id int PATH '@id',
+ _id FOR ORDINALITY,
+ country_name text PATH 'COUNTRY_NAME' NOT NULL,
+ country_id text PATH 'COUNTRY_ID',
+ region_id int PATH 'REGION_ID',
+ size float PATH 'SIZE',
+ unit text PATH 'SIZE/@unit',
+ premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified');
+
+EXECUTE pp;
+
+SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS "COUNTRY_NAME" text, "REGION_ID" int);
+SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id FOR ORDINALITY, "COUNTRY_NAME" text, "REGION_ID" int);
+SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id int PATH '@id', "COUNTRY_NAME" text, "REGION_ID" int);
+SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id int PATH '@id');
+SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id FOR ORDINALITY);
+SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id int PATH '@id', "COUNTRY_NAME" text, "REGION_ID" int, rawdata xml PATH '.');
+SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS id int PATH '@id', "COUNTRY_NAME" text, "REGION_ID" int, rawdata xml PATH './*');
+
+SELECT * FROM xmltable('/root' passing '<root><element>a1a<!-- aaaa -->a2a<?aaaaa?> <!--z--> bbbb<x>xxx</x>cccc</element></root>' COLUMNS element text);
+SELECT * FROM xmltable('/root' passing '<root><element>a1a<!-- aaaa -->a2a<?aaaaa?> <!--z--> bbbb<x>xxx</x>cccc</element></root>' COLUMNS element text PATH 'element/text()'); -- should fail
+
+-- CDATA test
+select * from xmltable('r' passing '<d><r><c><![CDATA[<hello> &"<>!<a>foo</a>]]></c></r><r><c>2</c></r></d>' columns c text);
+
+-- XML builtin entities
+SELECT * FROM xmltable('/x/a' PASSING '<x><a><ent>'</ent></a><a><ent>"</ent></a><a><ent>&</ent></a><a><ent><</ent></a><a><ent>></ent></a></x>' COLUMNS ent text);
+SELECT * FROM xmltable('/x/a' PASSING '<x><a><ent>'</ent></a><a><ent>"</ent></a><a><ent>&</ent></a><a><ent><</ent></a><a><ent>></ent></a></x>' COLUMNS ent xml);
+
+EXPLAIN (VERBOSE, COSTS OFF)
+SELECT xmltable.*
+ FROM (SELECT data FROM xmldata) x,
+ LATERAL XMLTABLE('/ROWS/ROW'
+ PASSING data
+ COLUMNS id int PATH '@id',
+ _id FOR ORDINALITY,
+ country_name text PATH 'COUNTRY_NAME' NOT NULL,
+ country_id text PATH 'COUNTRY_ID',
+ region_id int PATH 'REGION_ID',
+ size float PATH 'SIZE',
+ unit text PATH 'SIZE/@unit',
+ premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified');
+
+-- test qual
+SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS "COUNTRY_NAME" text, "REGION_ID" int) WHERE "COUNTRY_NAME" = 'Japan';
+
+EXPLAIN (VERBOSE, COSTS OFF)
+SELECT xmltable.* FROM xmldata, LATERAL xmltable('/ROWS/ROW[COUNTRY_NAME="Japan" or COUNTRY_NAME="India"]' PASSING data COLUMNS "COUNTRY_NAME" text, "REGION_ID" int) WHERE "COUNTRY_NAME" = 'Japan';
+
+-- should to work with more data
+INSERT INTO xmldata VALUES('<ROWS>
+<ROW id="10">
+ <COUNTRY_ID>CZ</COUNTRY_ID>
+ <COUNTRY_NAME>Czech Republic</COUNTRY_NAME>
+ <REGION_ID>2</REGION_ID><PREMIER_NAME>Milos Zeman</PREMIER_NAME>
+</ROW>
+<ROW id="11">
+ <COUNTRY_ID>DE</COUNTRY_ID>
+ <COUNTRY_NAME>Germany</COUNTRY_NAME>
+ <REGION_ID>2</REGION_ID>
+</ROW>
+<ROW id="12">
+ <COUNTRY_ID>FR</COUNTRY_ID>
+ <COUNTRY_NAME>France</COUNTRY_NAME>
+ <REGION_ID>2</REGION_ID>
+</ROW>
+</ROWS>');
+
+INSERT INTO xmldata VALUES('<ROWS>
+<ROW id="20">
+ <COUNTRY_ID>EG</COUNTRY_ID>
+ <COUNTRY_NAME>Egypt</COUNTRY_NAME>
+ <REGION_ID>1</REGION_ID>
+</ROW>
+<ROW id="21">
+ <COUNTRY_ID>SD</COUNTRY_ID>
+ <COUNTRY_NAME>Sudan</COUNTRY_NAME>
+ <REGION_ID>1</REGION_ID>
+</ROW>
+</ROWS>');
+
+SELECT xmltable.*
+ FROM (SELECT data FROM xmldata) x,
+ LATERAL XMLTABLE('/ROWS/ROW'
+ PASSING data
+ COLUMNS id int PATH '@id',
+ _id FOR ORDINALITY,
+ country_name text PATH 'COUNTRY_NAME' NOT NULL,
+ country_id text PATH 'COUNTRY_ID',
+ region_id int PATH 'REGION_ID',
+ size float PATH 'SIZE',
+ unit text PATH 'SIZE/@unit',
+ premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified');
+
+SELECT xmltable.*
+ FROM (SELECT data FROM xmldata) x,
+ LATERAL XMLTABLE('/ROWS/ROW'
+ PASSING data
+ COLUMNS id int PATH '@id',
+ _id FOR ORDINALITY,
+ country_name text PATH 'COUNTRY_NAME' NOT NULL,
+ country_id text PATH 'COUNTRY_ID',
+ region_id int PATH 'REGION_ID',
+ size float PATH 'SIZE',
+ unit text PATH 'SIZE/@unit',
+ premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified')
+ WHERE region_id = 2;
+
+EXPLAIN (VERBOSE, COSTS OFF)
+SELECT xmltable.*
+ FROM (SELECT data FROM xmldata) x,
+ LATERAL XMLTABLE('/ROWS/ROW'
+ PASSING data
+ COLUMNS id int PATH '@id',
+ _id FOR ORDINALITY,
+ country_name text PATH 'COUNTRY_NAME' NOT NULL,
+ country_id text PATH 'COUNTRY_ID',
+ region_id int PATH 'REGION_ID',
+ size float PATH 'SIZE',
+ unit text PATH 'SIZE/@unit',
+ premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified')
+ WHERE region_id = 2;
+
+-- should fail, NULL value
+SELECT xmltable.*
+ FROM (SELECT data FROM xmldata) x,
+ LATERAL XMLTABLE('/ROWS/ROW'
+ PASSING data
+ COLUMNS id int PATH '@id',
+ _id FOR ORDINALITY,
+ country_name text PATH 'COUNTRY_NAME' NOT NULL,
+ country_id text PATH 'COUNTRY_ID',
+ region_id int PATH 'REGION_ID',
+ size float PATH 'SIZE' NOT NULL,
+ unit text PATH 'SIZE/@unit',
+ premier_name text PATH 'PREMIER_NAME' DEFAULT 'not specified');
+
+-- if all is ok, then result is empty
+-- one line xml test
+WITH
+ x AS (SELECT proname, proowner, procost::numeric, pronargs,
+ array_to_string(proargnames,',') as proargnames,
+ case when proargtypes <> '' then array_to_string(proargtypes::oid[],',') end as proargtypes
+ FROM pg_proc WHERE proname = 'f_leak'),
+ y AS (SELECT xmlelement(name proc,
+ xmlforest(proname, proowner,
+ procost, pronargs,
+ proargnames, proargtypes)) as proc
+ FROM x),
+ z AS (SELECT xmltable.*
+ FROM y,
+ LATERAL xmltable('/proc' PASSING proc
+ COLUMNS proname name,
+ proowner oid,
+ procost float,
+ pronargs int,
+ proargnames text,
+ proargtypes text))
+ SELECT * FROM z
+ EXCEPT SELECT * FROM x;
+
+-- multi line xml test, result should be empty too
+WITH
+ x AS (SELECT proname, proowner, procost::numeric, pronargs,
+ array_to_string(proargnames,',') as proargnames,
+ case when proargtypes <> '' then array_to_string(proargtypes::oid[],',') end as proargtypes
+ FROM pg_proc),
+ y AS (SELECT xmlelement(name data,
+ xmlagg(xmlelement(name proc,
+ xmlforest(proname, proowner, procost,
+ pronargs, proargnames, proargtypes)))) as doc
+ FROM x),
+ z AS (SELECT xmltable.*
+ FROM y,
+ LATERAL xmltable('/data/proc' PASSING doc
+ COLUMNS proname name,
+ proowner oid,
+ procost float,
+ pronargs int,
+ proargnames text,
+ proargtypes text))
+ SELECT * FROM z
+ EXCEPT SELECT * FROM x;
+
+CREATE TABLE xmltest2(x xml, _path text);
+
+INSERT INTO xmltest2 VALUES('<d><r><ac>1</ac></r></d>', 'A');
+INSERT INTO xmltest2 VALUES('<d><r><bc>2</bc></r></d>', 'B');
+INSERT INTO xmltest2 VALUES('<d><r><cc>3</cc></r></d>', 'C');
+INSERT INTO xmltest2 VALUES('<d><r><dc>2</dc></r></d>', 'D');
+
+SELECT xmltable.* FROM xmltest2, LATERAL xmltable('/d/r' PASSING x COLUMNS a int PATH '' || lower(_path) || 'c');
+SELECT xmltable.* FROM xmltest2, LATERAL xmltable(('/d/r/' || lower(_path) || 'c') PASSING x COLUMNS a int PATH '.');
+SELECT xmltable.* FROM xmltest2, LATERAL xmltable(('/d/r/' || lower(_path) || 'c') PASSING x COLUMNS a int PATH 'x' DEFAULT ascii(_path) - 54);
projects / postgresql / commitdiff