* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $Header: /cvsroot/pgsql/src/backend/parser/analyze.c,v 1.213 2002/01/03 23:21:31 tgl Exp $
+ * $Header: /cvsroot/pgsql/src/backend/parser/analyze.c,v 1.214 2002/02/25 04:21:55 momjian Exp $
*
*-------------------------------------------------------------------------
*/
} CreateStmtContext;
-static Query *transformStmt(ParseState *pstate, Node *stmt);
+static Query *transformStmt(ParseState *pstate, Node *stmt,
+ List **extras_before, List **extras_after);
static Query *transformDeleteStmt(ParseState *pstate, DeleteStmt *stmt);
-static Query *transformInsertStmt(ParseState *pstate, InsertStmt *stmt);
+static Query *transformInsertStmt(ParseState *pstate, InsertStmt *stmt,
+ List **extras_before, List **extras_after);
static Query *transformIndexStmt(ParseState *pstate, IndexStmt *stmt);
-static Query *transformRuleStmt(ParseState *query, RuleStmt *stmt);
+static Query *transformRuleStmt(ParseState *query, RuleStmt *stmt,
+ List **extras_before, List **extras_after);
static Query *transformSelectStmt(ParseState *pstate, SelectStmt *stmt);
static Query *transformSetOperationStmt(ParseState *pstate, SelectStmt *stmt);
static Node *transformSetOperationTree(ParseState *pstate, SelectStmt *stmt);
static Query *transformUpdateStmt(ParseState *pstate, UpdateStmt *stmt);
-static Query *transformCreateStmt(ParseState *pstate, CreateStmt *stmt);
-static Query *transformAlterTableStmt(ParseState *pstate, AlterTableStmt *stmt);
+static Query *transformCreateStmt(ParseState *pstate, CreateStmt *stmt,
+ List **extras_before, List **extras_after);
+static Query *transformAlterTableStmt(ParseState *pstate, AlterTableStmt *stmt,
+ List **extras_before, List **extras_after);
static void transformColumnDefinition(ParseState *pstate,
CreateStmtContext *cxt,
ColumnDef *column);
static void release_pstate_resources(ParseState *pstate);
static FromExpr *makeFromExpr(List *fromlist, Node *quals);
-/* kluge to return extra info from transformCreateStmt() */
-static List *extras_before;
-static List *extras_after;
/*
List *result = NIL;
ParseState *pstate = make_parsestate(parentParseState);
Query *query;
+ /* Lists to return extra commands from transformation */
+ List *extras_before = NIL;
+ List *extras_after = NIL;
- extras_before = extras_after = NIL;
-
- query = transformStmt(pstate, parseTree);
+ query = transformStmt(pstate, parseTree, &extras_before, &extras_after);
release_pstate_resources(pstate);
while (extras_before != NIL)
{
- result = lappend(result,
- transformStmt(pstate, lfirst(extras_before)));
- release_pstate_resources(pstate);
+ result = nconc(result, parse_analyze(lfirst(extras_before), pstate));
extras_before = lnext(extras_before);
}
while (extras_after != NIL)
{
- result = lappend(result,
- transformStmt(pstate, lfirst(extras_after)));
- release_pstate_resources(pstate);
+ result = nconc(result, parse_analyze(lfirst(extras_after), pstate));
extras_after = lnext(extras_after);
}
* transform a Parse tree into a Query tree.
*/
static Query *
-transformStmt(ParseState *pstate, Node *parseTree)
+transformStmt(ParseState *pstate, Node *parseTree,
+ List **extras_before, List **extras_after)
{
Query *result = NULL;
* Non-optimizable statements
*/
case T_CreateStmt:
- result = transformCreateStmt(pstate, (CreateStmt *) parseTree);
+ result = transformCreateStmt(pstate, (CreateStmt *) parseTree,
+ extras_before, extras_after);
break;
case T_IndexStmt:
break;
case T_RuleStmt:
- result = transformRuleStmt(pstate, (RuleStmt *) parseTree);
+ result = transformRuleStmt(pstate, (RuleStmt *) parseTree,
+ extras_before, extras_after);
break;
case T_ViewStmt:
{
ViewStmt *n = (ViewStmt *) parseTree;
- n->query = transformStmt(pstate, (Node *) n->query);
+ n->query = transformStmt(pstate, (Node *) n->query,
+ extras_before, extras_after);
/*
* If a list of column names was given, run through and
result = makeNode(Query);
result->commandType = CMD_UTILITY;
- n->query = transformStmt(pstate, (Node *) n->query);
+ n->query = transformStmt(pstate, (Node *) n->query,
+ extras_before, extras_after);
result->utilityStmt = (Node *) parseTree;
}
break;
case T_AlterTableStmt:
- result = transformAlterTableStmt(pstate, (AlterTableStmt *) parseTree);
+ result = transformAlterTableStmt(pstate, (AlterTableStmt *) parseTree,
+ extras_before, extras_after);
break;
/*
* Optimizable statements
*/
case T_InsertStmt:
- result = transformInsertStmt(pstate, (InsertStmt *) parseTree);
+ result = transformInsertStmt(pstate, (InsertStmt *) parseTree,
+ extras_before, extras_after);
break;
case T_DeleteStmt:
* transform an Insert Statement
*/
static Query *
-transformInsertStmt(ParseState *pstate, InsertStmt *stmt)
+transformInsertStmt(ParseState *pstate, InsertStmt *stmt,
+ List **extras_before, List **extras_after)
{
Query *qry = makeNode(Query);
List *sub_rtable;
sub_pstate->p_rtable = sub_rtable;
sub_pstate->p_namespace = sub_namespace;
- selectQuery = transformStmt(sub_pstate, stmt->selectStmt);
+ /*
+ * Note: we are not expecting that extras_before and extras_after
+ * are going to be used by the transformation of the SELECT statement.
+ */
+ selectQuery = transformStmt(sub_pstate, stmt->selectStmt,
+ extras_before, extras_after);
release_pstate_resources(sub_pstate);
pfree(sub_pstate);
* - thomas 1997-12-02
*/
static Query *
-transformCreateStmt(ParseState *pstate, CreateStmt *stmt)
+transformCreateStmt(ParseState *pstate, CreateStmt *stmt,
+ List **extras_before, List **extras_after)
{
CreateStmtContext cxt;
Query *q;
q->utilityStmt = (Node *) stmt;
stmt->tableElts = cxt.columns;
stmt->constraints = cxt.ckconstraints;
- extras_before = cxt.blist;
- extras_after = cxt.alist;
+ *extras_before = nconc (*extras_before, cxt.blist);
+ *extras_after = nconc (cxt.alist, *extras_after);
return q;
}
* trees which is transformed into a list of query trees.
*/
static Query *
-transformRuleStmt(ParseState *pstate, RuleStmt *stmt)
+transformRuleStmt(ParseState *pstate, RuleStmt *stmt,
+ List **extras_before, List **extras_after)
{
Query *qry;
RangeTblEntry *oldrte;
addRTEtoQuery(sub_pstate, newrte, false, true);
/* Transform the rule action statement */
- top_subqry = transformStmt(sub_pstate, action);
+ top_subqry = transformStmt(sub_pstate, action,
+ extras_before, extras_after);
/*
* We cannot support utility-statement actions (eg NOTIFY)
* transform an Alter Table Statement
*/
static Query *
-transformAlterTableStmt(ParseState *pstate, AlterTableStmt *stmt)
+transformAlterTableStmt(ParseState *pstate, AlterTableStmt *stmt,
+ List **extras_before, List **extras_after)
{
CreateStmtContext cxt;
Query *qry;
transformFKConstraints(pstate, &cxt);
((ColumnDef *) stmt->def)->constraints = cxt.ckconstraints;
- extras_before = cxt.blist;
- extras_after = cxt.alist;
+ *extras_before = nconc(*extras_before, cxt.blist);
+ *extras_after = nconc(cxt.alist, *extras_after);
break;
case 'C':
Assert(cxt.columns == NIL);
stmt->def = (Node *) nconc(cxt.ckconstraints, cxt.fkconstraints);
- extras_before = cxt.blist;
- extras_after = cxt.alist;
+ *extras_before = nconc(*extras_before, cxt.blist);
+ *extras_after = nconc(cxt.alist, *extras_after);
break;
default: