1 /*-------------------------------------------------------------------------
4 * definitions for parse tree nodes
6 * Many of the node types used in parsetrees include a "location" field.
7 * This is a byte (not character) offset in the original source text, to be
8 * used for positioning an error cursor when there is an error related to
9 * the node. Access to the original source text is needed to make use of
13 * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
14 * Portions Copyright (c) 1994, Regents of the University of California
16 * src/include/nodes/parsenodes.h
18 *-------------------------------------------------------------------------
23 #include "nodes/bitmapset.h"
24 #include "nodes/primnodes.h"
25 #include "nodes/value.h"
27 /* Possible sources of a Query */
28 typedef enum QuerySource
30 QSRC_ORIGINAL, /* original parsetree (explicit query) */
31 QSRC_PARSER, /* added by parse analysis (now unused) */
32 QSRC_INSTEAD_RULE, /* added by unconditional INSTEAD rule */
33 QSRC_QUAL_INSTEAD_RULE, /* added by conditional INSTEAD rule */
34 QSRC_NON_INSTEAD_RULE /* added by non-INSTEAD rule */
37 /* Sort ordering options for ORDER BY and CREATE INDEX */
38 typedef enum SortByDir
43 SORTBY_USING /* not allowed in CREATE INDEX ... */
46 typedef enum SortByNulls
54 * Grantable rights are encoded so that we can OR them together in a bitmask.
55 * The present representation of AclItem limits us to 16 distinct rights,
56 * even though AclMode is defined as uint32. See utils/acl.h.
58 * Caution: changing these codes breaks stored ACLs, hence forces initdb.
60 typedef uint32 AclMode; /* a bitmask of privilege bits */
62 #define ACL_INSERT (1<<0) /* for relations */
63 #define ACL_SELECT (1<<1)
64 #define ACL_UPDATE (1<<2)
65 #define ACL_DELETE (1<<3)
66 #define ACL_TRUNCATE (1<<4)
67 #define ACL_REFERENCES (1<<5)
68 #define ACL_TRIGGER (1<<6)
69 #define ACL_EXECUTE (1<<7) /* for functions */
70 #define ACL_USAGE (1<<8) /* for languages, namespaces, FDWs, and
72 #define ACL_CREATE (1<<9) /* for namespaces and databases */
73 #define ACL_CREATE_TEMP (1<<10) /* for databases */
74 #define ACL_CONNECT (1<<11) /* for databases */
75 #define N_ACL_RIGHTS 12 /* 1 plus the last 1<<x */
76 #define ACL_NO_RIGHTS 0
77 /* Currently, SELECT ... FOR UPDATE/FOR SHARE requires UPDATE privileges */
78 #define ACL_SELECT_FOR_UPDATE ACL_UPDATE
81 /*****************************************************************************
83 *****************************************************************************/
87 * Parse analysis turns all statements into a Query tree
88 * for further processing by the rewriter and planner.
90 * Utility statements (i.e. non-optimizable statements) have the
91 * utilityStmt field set, and the Query itself is mostly dummy.
92 * DECLARE CURSOR is a special case: it is represented like a SELECT,
93 * but the original DeclareCursorStmt is stored in utilityStmt.
95 * Planning converts a Query tree into a Plan tree headed by a PlannedStmt
96 * node --- the Query structure is not used by the executor.
102 CmdType commandType; /* select|insert|update|delete|utility */
104 QuerySource querySource; /* where did I come from? */
106 bool canSetTag; /* do I set the command result tag? */
108 Node *utilityStmt; /* non-null if this is DECLARE CURSOR or a
109 * non-optimizable statement */
111 int resultRelation; /* rtable index of target relation for
112 * INSERT/UPDATE/DELETE; 0 for SELECT */
114 bool hasAggs; /* has aggregates in tlist or havingQual */
115 bool hasWindowFuncs; /* has window functions in tlist */
116 bool hasSubLinks; /* has subquery SubLink */
117 bool hasDistinctOn; /* distinctClause is from DISTINCT ON */
118 bool hasRecursive; /* WITH RECURSIVE was specified */
119 bool hasModifyingCTE; /* has INSERT/UPDATE/DELETE in WITH */
120 bool hasForUpdate; /* FOR UPDATE or FOR SHARE was specified */
122 List *cteList; /* WITH list (of CommonTableExpr's) */
124 List *rtable; /* list of range table entries */
125 FromExpr *jointree; /* table join tree (FROM and WHERE clauses) */
127 List *targetList; /* target list (of TargetEntry) */
129 List *returningList; /* return-values list (of TargetEntry) */
131 List *groupClause; /* a list of SortGroupClause's */
133 Node *havingQual; /* qualifications applied to groups */
135 List *windowClause; /* a list of WindowClause's */
137 List *distinctClause; /* a list of SortGroupClause's */
139 List *sortClause; /* a list of SortGroupClause's */
141 Node *limitOffset; /* # of result tuples to skip (int8 expr) */
142 Node *limitCount; /* # of result tuples to return (int8 expr) */
144 List *rowMarks; /* a list of RowMarkClause's */
146 Node *setOperations; /* set-operation tree if this is top level of
147 * a UNION/INTERSECT/EXCEPT query */
149 List *constraintDeps; /* a list of pg_constraint OIDs that the query
150 * depends on to be semantically valid */
154 /****************************************************************************
155 * Supporting data structures for Parse Trees
157 * Most of these node types appear in raw parsetrees output by the grammar,
158 * and get transformed to something else by the analyzer. A few of them
159 * are used as-is in transformed querytrees.
160 ****************************************************************************/
163 * TypeName - specifies a type in definitions
165 * For TypeName structures generated internally, it is often easier to
166 * specify the type by OID than by name. If "names" is NIL then the
167 * actual type OID is given by typeOid, otherwise typeOid is unused.
168 * Similarly, if "typmods" is NIL then the actual typmod is expected to
169 * be prespecified in typemod, otherwise typemod is unused.
171 * If pct_type is TRUE, then names is actually a field name and we look up
172 * the type of that field. Otherwise (the normal case), names is a type
173 * name possibly qualified with schema and database name.
175 typedef struct TypeName
178 List *names; /* qualified name (list of Value strings) */
179 Oid typeOid; /* type identified by OID */
180 bool setof; /* is a set? */
181 bool pct_type; /* %TYPE specified? */
182 List *typmods; /* type modifier expression(s) */
183 int32 typemod; /* prespecified type modifier */
184 List *arrayBounds; /* array bounds */
185 int location; /* token location, or -1 if unknown */
189 * ColumnRef - specifies a reference to a column, or possibly a whole tuple
191 * The "fields" list must be nonempty. It can contain string Value nodes
192 * (representing names) and A_Star nodes (representing occurrence of a '*').
193 * Currently, A_Star must appear only as the last list element --- the grammar
194 * is responsible for enforcing this!
196 * Note: any array subscripting or selection of fields from composite columns
197 * is represented by an A_Indirection node above the ColumnRef. However,
198 * for simplicity in the normal case, initial field selection from a table
199 * name is represented within ColumnRef and not by adding A_Indirection.
201 typedef struct ColumnRef
204 List *fields; /* field names (Value strings) or A_Star */
205 int location; /* token location, or -1 if unknown */
209 * ParamRef - specifies a $n parameter reference
211 typedef struct ParamRef
214 int number; /* the number of the parameter */
215 int location; /* token location, or -1 if unknown */
219 * A_Expr - infix, prefix, and postfix expressions
221 typedef enum A_Expr_Kind
223 AEXPR_OP, /* normal operator */
224 AEXPR_AND, /* booleans - name field is unused */
227 AEXPR_OP_ANY, /* scalar op ANY (array) */
228 AEXPR_OP_ALL, /* scalar op ALL (array) */
229 AEXPR_DISTINCT, /* IS DISTINCT FROM - name must be "=" */
230 AEXPR_NULLIF, /* NULLIF - name must be "=" */
231 AEXPR_OF, /* IS [NOT] OF - name must be "=" or "<>" */
232 AEXPR_IN /* [NOT] IN - name must be "=" or "<>" */
235 typedef struct A_Expr
238 A_Expr_Kind kind; /* see above */
239 List *name; /* possibly-qualified name of operator */
240 Node *lexpr; /* left argument, or NULL if none */
241 Node *rexpr; /* right argument, or NULL if none */
242 int location; /* token location, or -1 if unknown */
246 * A_Const - a literal constant
248 typedef struct A_Const
251 Value val; /* value (includes type info, see value.h) */
252 int location; /* token location, or -1 if unknown */
256 * TypeCast - a CAST expression
258 typedef struct TypeCast
261 Node *arg; /* the expression being casted */
262 TypeName *typeName; /* the target type */
263 int location; /* token location, or -1 if unknown */
267 * CollateClause - a COLLATE expression
269 typedef struct CollateClause
272 Node *arg; /* input expression */
273 List *collname; /* possibly-qualified collation name */
274 int location; /* token location, or -1 if unknown */
278 * FuncCall - a function or aggregate invocation
280 * agg_order (if not NIL) indicates we saw 'foo(... ORDER BY ...)'.
281 * agg_star indicates we saw a 'foo(*)' construct, while agg_distinct
282 * indicates we saw 'foo(DISTINCT ...)'. In any of these cases, the
283 * construct *must* be an aggregate call. Otherwise, it might be either an
284 * aggregate or some other kind of function. However, if OVER is present
285 * it had better be an aggregate or window function.
287 typedef struct FuncCall
290 List *funcname; /* qualified name of function */
291 List *args; /* the arguments (list of exprs) */
292 List *agg_order; /* ORDER BY (list of SortBy) */
293 bool agg_star; /* argument was really '*' */
294 bool agg_distinct; /* arguments were labeled DISTINCT */
295 bool func_variadic; /* last argument was labeled VARIADIC */
296 struct WindowDef *over; /* OVER clause, if any */
297 int location; /* token location, or -1 if unknown */
301 * A_Star - '*' representing all columns of a table or compound field
303 * This can appear within ColumnRef.fields, A_Indirection.indirection, and
304 * ResTarget.indirection lists.
306 typedef struct A_Star
312 * A_Indices - array subscript or slice bounds ([lidx:uidx] or [uidx])
314 typedef struct A_Indices
317 Node *lidx; /* NULL if it's a single subscript */
322 * A_Indirection - select a field and/or array element from an expression
324 * The indirection list can contain A_Indices nodes (representing
325 * subscripting), string Value nodes (representing field selection --- the
326 * string value is the name of the field to select), and A_Star nodes
327 * (representing selection of all fields of a composite type).
328 * For example, a complex selection operation like
329 * (foo).field1[42][7].field2
330 * would be represented with a single A_Indirection node having a 4-element
333 * Currently, A_Star must appear only as the last list element --- the grammar
334 * is responsible for enforcing this!
336 typedef struct A_Indirection
339 Node *arg; /* the thing being selected from */
340 List *indirection; /* subscripts and/or field names and/or * */
344 * A_ArrayExpr - an ARRAY[] construct
346 typedef struct A_ArrayExpr
349 List *elements; /* array element expressions */
350 int location; /* token location, or -1 if unknown */
355 * result target (used in target list of pre-transformed parse trees)
357 * In a SELECT target list, 'name' is the column label from an
358 * 'AS ColumnLabel' clause, or NULL if there was none, and 'val' is the
359 * value expression itself. The 'indirection' field is not used.
361 * INSERT uses ResTarget in its target-column-names list. Here, 'name' is
362 * the name of the destination column, 'indirection' stores any subscripts
363 * attached to the destination, and 'val' is not used.
365 * In an UPDATE target list, 'name' is the name of the destination column,
366 * 'indirection' stores any subscripts attached to the destination, and
367 * 'val' is the expression to assign.
369 * See A_Indirection for more info about what can appear in 'indirection'.
371 typedef struct ResTarget
374 char *name; /* column name or NULL */
375 List *indirection; /* subscripts, field names, and '*', or NIL */
376 Node *val; /* the value expression to compute or assign */
377 int location; /* token location, or -1 if unknown */
381 * SortBy - for ORDER BY clause
383 typedef struct SortBy
386 Node *node; /* expression to sort on */
387 SortByDir sortby_dir; /* ASC/DESC/USING/default */
388 SortByNulls sortby_nulls; /* NULLS FIRST/LAST */
389 List *useOp; /* name of op to use, if SORTBY_USING */
390 int location; /* operator location, or -1 if none/unknown */
394 * WindowDef - raw representation of WINDOW and OVER clauses
396 * For entries in a WINDOW list, "name" is the window name being defined.
397 * For OVER clauses, we use "name" for the "OVER window" syntax, or "refname"
398 * for the "OVER (window)" syntax, which is subtly different --- the latter
399 * implies overriding the window frame clause.
401 typedef struct WindowDef
404 char *name; /* window's own name */
405 char *refname; /* referenced window name, if any */
406 List *partitionClause; /* PARTITION BY expression list */
407 List *orderClause; /* ORDER BY (list of SortBy) */
408 int frameOptions; /* frame_clause options, see below */
409 Node *startOffset; /* expression for starting bound, if any */
410 Node *endOffset; /* expression for ending bound, if any */
411 int location; /* parse location, or -1 if none/unknown */
415 * frameOptions is an OR of these bits. The NONDEFAULT and BETWEEN bits are
416 * used so that ruleutils.c can tell which properties were specified and
417 * which were defaulted; the correct behavioral bits must be set either way.
418 * The START_foo and END_foo options must come in pairs of adjacent bits for
419 * the convenience of gram.y, even though some of them are useless/invalid.
420 * We will need more bits (and fields) to cover the full SQL:2008 option set.
422 #define FRAMEOPTION_NONDEFAULT 0x00001 /* any specified? */
423 #define FRAMEOPTION_RANGE 0x00002 /* RANGE behavior */
424 #define FRAMEOPTION_ROWS 0x00004 /* ROWS behavior */
425 #define FRAMEOPTION_BETWEEN 0x00008 /* BETWEEN given? */
426 #define FRAMEOPTION_START_UNBOUNDED_PRECEDING 0x00010 /* start is U. P. */
427 #define FRAMEOPTION_END_UNBOUNDED_PRECEDING 0x00020 /* (disallowed) */
428 #define FRAMEOPTION_START_UNBOUNDED_FOLLOWING 0x00040 /* (disallowed) */
429 #define FRAMEOPTION_END_UNBOUNDED_FOLLOWING 0x00080 /* end is U. F. */
430 #define FRAMEOPTION_START_CURRENT_ROW 0x00100 /* start is C. R. */
431 #define FRAMEOPTION_END_CURRENT_ROW 0x00200 /* end is C. R. */
432 #define FRAMEOPTION_START_VALUE_PRECEDING 0x00400 /* start is V. P. */
433 #define FRAMEOPTION_END_VALUE_PRECEDING 0x00800 /* end is V. P. */
434 #define FRAMEOPTION_START_VALUE_FOLLOWING 0x01000 /* start is V. F. */
435 #define FRAMEOPTION_END_VALUE_FOLLOWING 0x02000 /* end is V. F. */
437 #define FRAMEOPTION_START_VALUE \
438 (FRAMEOPTION_START_VALUE_PRECEDING | FRAMEOPTION_START_VALUE_FOLLOWING)
439 #define FRAMEOPTION_END_VALUE \
440 (FRAMEOPTION_END_VALUE_PRECEDING | FRAMEOPTION_END_VALUE_FOLLOWING)
442 #define FRAMEOPTION_DEFAULTS \
443 (FRAMEOPTION_RANGE | FRAMEOPTION_START_UNBOUNDED_PRECEDING | \
444 FRAMEOPTION_END_CURRENT_ROW)
447 * RangeSubselect - subquery appearing in a FROM clause
449 typedef struct RangeSubselect
452 Node *subquery; /* the untransformed sub-select clause */
453 Alias *alias; /* table alias & optional column aliases */
457 * RangeFunction - function call appearing in a FROM clause
459 typedef struct RangeFunction
462 Node *funccallnode; /* untransformed function call tree */
463 Alias *alias; /* table alias & optional column aliases */
464 List *coldeflist; /* list of ColumnDef nodes to describe result
465 * of function returning RECORD */
469 * ColumnDef - column definition (used in various creates)
471 * If the column has a default value, we may have the value expression
472 * in either "raw" form (an untransformed parse tree) or "cooked" form
473 * (a post-parse-analysis, executable expression tree), depending on
474 * how this ColumnDef node was created (by parsing, or by inheritance
475 * from an existing relation). We should never have both in the same node!
477 * Similarly, we may have a COLLATE specification in either raw form
478 * (represented as a CollateClause with arg==NULL) or cooked form
479 * (the collation's OID).
481 * The constraints list may contain a CONSTR_DEFAULT item in a raw
482 * parsetree produced by gram.y, but transformCreateStmt will remove
483 * the item and set raw_default instead. CONSTR_DEFAULT items
484 * should not appear in any subsequent processing.
486 typedef struct ColumnDef
489 char *colname; /* name of column */
490 TypeName *typeName; /* type of column */
491 int inhcount; /* number of times column is inherited */
492 bool is_local; /* column has local (non-inherited) def'n */
493 bool is_not_null; /* NOT NULL constraint specified? */
494 bool is_from_type; /* column definition came from table type */
495 char storage; /* attstorage setting, or 0 for default */
496 Node *raw_default; /* default value (untransformed parse tree) */
497 Node *cooked_default; /* default value (transformed expr tree) */
498 CollateClause *collClause; /* untransformed COLLATE spec, if any */
499 Oid collOid; /* collation OID (InvalidOid if not set) */
500 List *constraints; /* other constraints on column */
501 List *fdwoptions; /* per-column FDW options */
505 * TableLikeClause - CREATE TABLE ( ... LIKE ... ) clause
507 typedef struct TableLikeClause
511 bits32 options; /* OR of TableLikeOption flags */
514 typedef enum TableLikeOption
516 CREATE_TABLE_LIKE_DEFAULTS = 1 << 0,
517 CREATE_TABLE_LIKE_CONSTRAINTS = 1 << 1,
518 CREATE_TABLE_LIKE_INDEXES = 1 << 2,
519 CREATE_TABLE_LIKE_STORAGE = 1 << 3,
520 CREATE_TABLE_LIKE_COMMENTS = 1 << 4,
521 CREATE_TABLE_LIKE_ALL = 0x7FFFFFFF
525 * IndexElem - index parameters (used in CREATE INDEX)
527 * For a plain index attribute, 'name' is the name of the table column to
528 * index, and 'expr' is NULL. For an index expression, 'name' is NULL and
529 * 'expr' is the expression tree.
531 typedef struct IndexElem
534 char *name; /* name of attribute to index, or NULL */
535 Node *expr; /* expression to index, or NULL */
536 char *indexcolname; /* name for index column; NULL = default */
537 List *collation; /* name of collation; NIL = default */
538 List *opclass; /* name of desired opclass; NIL = default */
539 SortByDir ordering; /* ASC/DESC/default */
540 SortByNulls nulls_ordering; /* FIRST/LAST/default */
544 * DefElem - a generic "name = value" option definition
546 * In some contexts the name can be qualified. Also, certain SQL commands
547 * allow a SET/ADD/DROP action to be attached to option settings, so it's
548 * convenient to carry a field for that too. (Note: currently, it is our
549 * practice that the grammar allows namespace and action only in statements
550 * where they are relevant; C code can just ignore those fields in other
553 typedef enum DefElemAction
555 DEFELEM_UNSPEC, /* no action given */
561 typedef struct DefElem
564 char *defnamespace; /* NULL if unqualified name */
566 Node *arg; /* a (Value *) or a (TypeName *) */
567 DefElemAction defaction; /* unspecified action, or SET/ADD/DROP */
571 * LockingClause - raw representation of FOR UPDATE/SHARE options
573 * Note: lockedRels == NIL means "all relations in query". Otherwise it
574 * is a list of RangeVar nodes. (We use RangeVar mainly because it carries
575 * a location field --- currently, parse analysis insists on unqualified
576 * names in LockingClause.)
578 typedef struct LockingClause
581 List *lockedRels; /* FOR UPDATE or FOR SHARE relations */
582 bool forUpdate; /* true = FOR UPDATE, false = FOR SHARE */
583 bool noWait; /* NOWAIT option */
587 * XMLSERIALIZE (in raw parse tree only)
589 typedef struct XmlSerialize
592 XmlOptionType xmloption; /* DOCUMENT or CONTENT */
595 int location; /* token location, or -1 if unknown */
599 /****************************************************************************
600 * Nodes for a Query tree
601 ****************************************************************************/
603 /*--------------------
605 * A range table is a List of RangeTblEntry nodes.
607 * A range table entry may represent a plain relation, a sub-select in
608 * FROM, or the result of a JOIN clause. (Only explicit JOIN syntax
609 * produces an RTE, not the implicit join resulting from multiple FROM
610 * items. This is because we only need the RTE to deal with SQL features
611 * like outer joins and join-output-column aliasing.) Other special
612 * RTE types also exist, as indicated by RTEKind.
614 * Note that we consider RTE_RELATION to cover anything that has a pg_class
615 * entry. relkind distinguishes the sub-cases.
617 * alias is an Alias node representing the AS alias-clause attached to the
618 * FROM expression, or NULL if no clause.
620 * eref is the table reference name and column reference names (either
621 * real or aliases). Note that system columns (OID etc) are not included
622 * in the column list.
623 * eref->aliasname is required to be present, and should generally be used
624 * to identify the RTE for error messages etc.
626 * In RELATION RTEs, the colnames in both alias and eref are indexed by
627 * physical attribute number; this means there must be colname entries for
628 * dropped columns. When building an RTE we insert empty strings ("") for
629 * dropped columns. Note however that a stored rule may have nonempty
630 * colnames for columns dropped since the rule was created (and for that
631 * matter the colnames might be out of date due to column renamings).
632 * The same comments apply to FUNCTION RTEs when the function's return type
633 * is a named composite type.
635 * In JOIN RTEs, the colnames in both alias and eref are one-to-one with
636 * joinaliasvars entries. A JOIN RTE will omit columns of its inputs when
637 * those columns are known to be dropped at parse time. Again, however,
638 * a stored rule might contain entries for columns dropped since the rule
639 * was created. (This is only possible for columns not actually referenced
640 * in the rule.) When loading a stored rule, we replace the joinaliasvars
641 * items for any such columns with NULL Consts. (We can't simply delete
642 * them from the joinaliasvars list, because that would affect the attnums
643 * of Vars referencing the rest of the list.)
645 * inh is TRUE for relation references that should be expanded to include
646 * inheritance children, if the rel has any. This *must* be FALSE for
647 * RTEs other than RTE_RELATION entries.
649 * inFromCl marks those range variables that are listed in the FROM clause.
650 * It's false for RTEs that are added to a query behind the scenes, such
651 * as the NEW and OLD variables for a rule, or the subqueries of a UNION.
652 * This flag is not used anymore during parsing, since the parser now uses
653 * a separate "namespace" data structure to control visibility, but it is
654 * needed by ruleutils.c to determine whether RTEs should be shown in
655 * decompiled queries.
657 * requiredPerms and checkAsUser specify run-time access permissions
658 * checks to be performed at query startup. The user must have *all*
659 * of the permissions that are OR'd together in requiredPerms (zero
660 * indicates no permissions checking). If checkAsUser is not zero,
661 * then do the permissions checks using the access rights of that user,
662 * not the current effective user ID. (This allows rules to act as
663 * setuid gateways.) Permissions checks only apply to RELATION RTEs.
665 * For SELECT/INSERT/UPDATE permissions, if the user doesn't have
666 * table-wide permissions then it is sufficient to have the permissions
667 * on all columns identified in selectedCols (for SELECT) and/or
668 * modifiedCols (for INSERT/UPDATE; we can tell which from the query type).
669 * selectedCols and modifiedCols are bitmapsets, which cannot have negative
670 * integer members, so we subtract FirstLowInvalidHeapAttributeNumber from
671 * column numbers before storing them in these fields. A whole-row Var
672 * reference is represented by setting the bit for InvalidAttrNumber.
673 *--------------------
677 RTE_RELATION, /* ordinary relation reference */
678 RTE_SUBQUERY, /* subquery in FROM */
680 RTE_FUNCTION, /* function in FROM */
681 RTE_VALUES, /* VALUES (<exprlist>), (<exprlist>), ... */
682 RTE_CTE /* common table expr (WITH list element) */
685 typedef struct RangeTblEntry
689 RTEKind rtekind; /* see above */
692 * XXX the fields applicable to only some rte kinds should be merged into
693 * a union. I didn't do this yet because the diffs would impact a lot of
694 * code that is being actively worked on. FIXME someday.
698 * Fields valid for a plain relation RTE (else zero):
700 Oid relid; /* OID of the relation */
701 char relkind; /* relation kind (see pg_class.relkind) */
704 * Fields valid for a subquery RTE (else NULL):
706 Query *subquery; /* the sub-query */
707 bool security_barrier; /* subquery from security_barrier view */
710 * Fields valid for a join RTE (else NULL/zero):
712 * joinaliasvars is a list of Vars or COALESCE expressions corresponding
713 * to the columns of the join result. An alias Var referencing column K
714 * of the join result can be replaced by the K'th element of joinaliasvars
715 * --- but to simplify the task of reverse-listing aliases correctly, we
716 * do not do that until planning time. In a Query loaded from a stored
717 * rule, it is also possible for joinaliasvars items to be NULL Consts,
718 * denoting columns dropped since the rule was made.
720 JoinType jointype; /* type of join */
721 List *joinaliasvars; /* list of alias-var expansions */
724 * Fields valid for a function RTE (else NULL):
726 * If the function returns RECORD, funccoltypes lists the column types
727 * declared in the RTE's column type specification, funccoltypmods lists
728 * their declared typmods, funccolcollations their collations. Otherwise,
729 * those fields are NIL.
731 Node *funcexpr; /* expression tree for func call */
732 List *funccoltypes; /* OID list of column type OIDs */
733 List *funccoltypmods; /* integer list of column typmods */
734 List *funccolcollations; /* OID list of column collation OIDs */
737 * Fields valid for a values RTE (else NIL):
739 List *values_lists; /* list of expression lists */
740 List *values_collations; /* OID list of column collation OIDs */
743 * Fields valid for a CTE RTE (else NULL/zero):
745 char *ctename; /* name of the WITH list item */
746 Index ctelevelsup; /* number of query levels up */
747 bool self_reference; /* is this a recursive self-reference? */
748 List *ctecoltypes; /* OID list of column type OIDs */
749 List *ctecoltypmods; /* integer list of column typmods */
750 List *ctecolcollations; /* OID list of column collation OIDs */
753 * Fields valid in all RTEs:
755 Alias *alias; /* user-written alias clause, if any */
756 Alias *eref; /* expanded reference names */
757 bool inh; /* inheritance requested? */
758 bool inFromCl; /* present in FROM clause? */
759 AclMode requiredPerms; /* bitmask of required access permissions */
760 Oid checkAsUser; /* if valid, check access as this role */
761 Bitmapset *selectedCols; /* columns needing SELECT permission */
762 Bitmapset *modifiedCols; /* columns needing INSERT/UPDATE permission */
767 * representation of ORDER BY, GROUP BY, PARTITION BY,
768 * DISTINCT, DISTINCT ON items
770 * You might think that ORDER BY is only interested in defining ordering,
771 * and GROUP/DISTINCT are only interested in defining equality. However,
772 * one way to implement grouping is to sort and then apply a "uniq"-like
773 * filter. So it's also interesting to keep track of possible sort operators
774 * for GROUP/DISTINCT, and in particular to try to sort for the grouping
775 * in a way that will also yield a requested ORDER BY ordering. So we need
776 * to be able to compare ORDER BY and GROUP/DISTINCT lists, which motivates
777 * the decision to give them the same representation.
779 * tleSortGroupRef must match ressortgroupref of exactly one entry of the
780 * query's targetlist; that is the expression to be sorted or grouped by.
781 * eqop is the OID of the equality operator.
782 * sortop is the OID of the ordering operator (a "<" or ">" operator),
783 * or InvalidOid if not available.
784 * nulls_first means about what you'd expect. If sortop is InvalidOid
785 * then nulls_first is meaningless and should be set to false.
786 * hashable is TRUE if eqop is hashable (note this condition also depends
787 * on the datatype of the input expression).
789 * In an ORDER BY item, all fields must be valid. (The eqop isn't essential
790 * here, but it's cheap to get it along with the sortop, and requiring it
791 * to be valid eases comparisons to grouping items.) Note that this isn't
792 * actually enough information to determine an ordering: if the sortop is
793 * collation-sensitive, a collation OID is needed too. We don't store the
794 * collation in SortGroupClause because it's not available at the time the
795 * parser builds the SortGroupClause; instead, consult the exposed collation
796 * of the referenced targetlist expression to find out what it is.
798 * In a grouping item, eqop must be valid. If the eqop is a btree equality
799 * operator, then sortop should be set to a compatible ordering operator.
800 * We prefer to set eqop/sortop/nulls_first to match any ORDER BY item that
801 * the query presents for the same tlist item. If there is none, we just
802 * use the default ordering op for the datatype.
804 * If the tlist item's type has a hash opclass but no btree opclass, then
805 * we will set eqop to the hash equality operator, sortop to InvalidOid,
806 * and nulls_first to false. A grouping item of this kind can only be
807 * implemented by hashing, and of course it'll never match an ORDER BY item.
809 * The hashable flag is provided since we generally have the requisite
810 * information readily available when the SortGroupClause is constructed,
811 * and it's relatively expensive to get it again later. Note there is no
812 * need for a "sortable" flag since OidIsValid(sortop) serves the purpose.
814 * A query might have both ORDER BY and DISTINCT (or DISTINCT ON) clauses.
815 * In SELECT DISTINCT, the distinctClause list is as long or longer than the
816 * sortClause list, while in SELECT DISTINCT ON it's typically shorter.
817 * The two lists must match up to the end of the shorter one --- the parser
818 * rearranges the distinctClause if necessary to make this true. (This
819 * restriction ensures that only one sort step is needed to both satisfy the
820 * ORDER BY and set up for the Unique step. This is semantically necessary
821 * for DISTINCT ON, and presents no real drawback for DISTINCT.)
823 typedef struct SortGroupClause
826 Index tleSortGroupRef; /* reference into targetlist */
827 Oid eqop; /* the equality operator ('=' op) */
828 Oid sortop; /* the ordering operator ('<' op), or 0 */
829 bool nulls_first; /* do NULLs come before normal values? */
830 bool hashable; /* can eqop be implemented by hashing? */
835 * transformed representation of WINDOW and OVER clauses
837 * A parsed Query's windowClause list contains these structs. "name" is set
838 * if the clause originally came from WINDOW, and is NULL if it originally
839 * was an OVER clause (but note that we collapse out duplicate OVERs).
840 * partitionClause and orderClause are lists of SortGroupClause structs.
841 * winref is an ID number referenced by WindowFunc nodes; it must be unique
842 * among the members of a Query's windowClause list.
843 * When refname isn't null, the partitionClause is always copied from there;
844 * the orderClause might or might not be copied (see copiedOrder); the framing
845 * options are never copied, per spec.
847 typedef struct WindowClause
850 char *name; /* window name (NULL in an OVER clause) */
851 char *refname; /* referenced window name, if any */
852 List *partitionClause; /* PARTITION BY list */
853 List *orderClause; /* ORDER BY list */
854 int frameOptions; /* frame_clause options, see WindowDef */
855 Node *startOffset; /* expression for starting bound, if any */
856 Node *endOffset; /* expression for ending bound, if any */
857 Index winref; /* ID referenced by window functions */
858 bool copiedOrder; /* did we copy orderClause from refname? */
863 * parser output representation of FOR UPDATE/SHARE clauses
865 * Query.rowMarks contains a separate RowMarkClause node for each relation
866 * identified as a FOR UPDATE/SHARE target. If FOR UPDATE/SHARE is applied
867 * to a subquery, we generate RowMarkClauses for all normal and subquery rels
868 * in the subquery, but they are marked pushedDown = true to distinguish them
869 * from clauses that were explicitly written at this query level. Also,
870 * Query.hasForUpdate tells whether there were explicit FOR UPDATE/SHARE
871 * clauses in the current query level.
873 typedef struct RowMarkClause
876 Index rti; /* range table index of target relation */
877 bool forUpdate; /* true = FOR UPDATE, false = FOR SHARE */
878 bool noWait; /* NOWAIT option */
879 bool pushedDown; /* pushed down from higher query level? */
884 * representation of WITH clause
886 * Note: WithClause does not propagate into the Query representation;
887 * but CommonTableExpr does.
889 typedef struct WithClause
892 List *ctes; /* list of CommonTableExprs */
893 bool recursive; /* true = WITH RECURSIVE */
894 int location; /* token location, or -1 if unknown */
899 * representation of WITH list element
901 * We don't currently support the SEARCH or CYCLE clause.
903 typedef struct CommonTableExpr
906 char *ctename; /* query name (never qualified) */
907 List *aliascolnames; /* optional list of column names */
908 /* SelectStmt/InsertStmt/etc before parse analysis, Query afterwards: */
909 Node *ctequery; /* the CTE's subquery */
910 int location; /* token location, or -1 if unknown */
911 /* These fields are set during parse analysis: */
912 bool cterecursive; /* is this CTE actually recursive? */
913 int cterefcount; /* number of RTEs referencing this CTE
914 * (excluding internal self-references) */
915 List *ctecolnames; /* list of output column names */
916 List *ctecoltypes; /* OID list of output column type OIDs */
917 List *ctecoltypmods; /* integer list of output column typmods */
918 List *ctecolcollations; /* OID list of column collation OIDs */
921 /* Convenience macro to get the output tlist of a CTE's query */
922 #define GetCTETargetList(cte) \
923 (AssertMacro(IsA((cte)->ctequery, Query)), \
924 ((Query *) (cte)->ctequery)->commandType == CMD_SELECT ? \
925 ((Query *) (cte)->ctequery)->targetList : \
926 ((Query *) (cte)->ctequery)->returningList)
929 /*****************************************************************************
930 * Optimizable Statements
931 *****************************************************************************/
933 /* ----------------------
936 * The source expression is represented by SelectStmt for both the
937 * SELECT and VALUES cases. If selectStmt is NULL, then the query
938 * is INSERT ... DEFAULT VALUES.
939 * ----------------------
941 typedef struct InsertStmt
944 RangeVar *relation; /* relation to insert into */
945 List *cols; /* optional: names of the target columns */
946 Node *selectStmt; /* the source SELECT/VALUES, or NULL */
947 List *returningList; /* list of expressions to return */
948 WithClause *withClause; /* WITH clause */
951 /* ----------------------
953 * ----------------------
955 typedef struct DeleteStmt
958 RangeVar *relation; /* relation to delete from */
959 List *usingClause; /* optional using clause for more tables */
960 Node *whereClause; /* qualifications */
961 List *returningList; /* list of expressions to return */
962 WithClause *withClause; /* WITH clause */
965 /* ----------------------
967 * ----------------------
969 typedef struct UpdateStmt
972 RangeVar *relation; /* relation to update */
973 List *targetList; /* the target list (of ResTarget) */
974 Node *whereClause; /* qualifications */
975 List *fromClause; /* optional from clause for more tables */
976 List *returningList; /* list of expressions to return */
977 WithClause *withClause; /* WITH clause */
980 /* ----------------------
983 * A "simple" SELECT is represented in the output of gram.y by a single
984 * SelectStmt node; so is a VALUES construct. A query containing set
985 * operators (UNION, INTERSECT, EXCEPT) is represented by a tree of SelectStmt
986 * nodes, in which the leaf nodes are component SELECTs and the internal nodes
987 * represent UNION, INTERSECT, or EXCEPT operators. Using the same node
988 * type for both leaf and internal nodes allows gram.y to stick ORDER BY,
989 * LIMIT, etc, clause values into a SELECT statement without worrying
990 * whether it is a simple or compound SELECT.
991 * ----------------------
993 typedef enum SetOperation
1001 typedef struct SelectStmt
1006 * These fields are used only in "leaf" SelectStmts.
1008 List *distinctClause; /* NULL, list of DISTINCT ON exprs, or
1009 * lcons(NIL,NIL) for all (SELECT DISTINCT) */
1010 IntoClause *intoClause; /* target for SELECT INTO */
1011 List *targetList; /* the target list (of ResTarget) */
1012 List *fromClause; /* the FROM clause */
1013 Node *whereClause; /* WHERE qualification */
1014 List *groupClause; /* GROUP BY clauses */
1015 Node *havingClause; /* HAVING conditional-expression */
1016 List *windowClause; /* WINDOW window_name AS (...), ... */
1017 WithClause *withClause; /* WITH clause */
1020 * In a "leaf" node representing a VALUES list, the above fields are all
1021 * null, and instead this field is set. Note that the elements of the
1022 * sublists are just expressions, without ResTarget decoration. Also note
1023 * that a list element can be DEFAULT (represented as a SetToDefault
1024 * node), regardless of the context of the VALUES list. It's up to parse
1025 * analysis to reject that where not valid.
1027 List *valuesLists; /* untransformed list of expression lists */
1030 * These fields are used in both "leaf" SelectStmts and upper-level
1033 List *sortClause; /* sort clause (a list of SortBy's) */
1034 Node *limitOffset; /* # of result tuples to skip */
1035 Node *limitCount; /* # of result tuples to return */
1036 List *lockingClause; /* FOR UPDATE (list of LockingClause's) */
1039 * These fields are used only in upper-level SelectStmts.
1041 SetOperation op; /* type of set op */
1042 bool all; /* ALL specified? */
1043 struct SelectStmt *larg; /* left child */
1044 struct SelectStmt *rarg; /* right child */
1045 /* Eventually add fields for CORRESPONDING spec here */
1049 /* ----------------------
1050 * Set Operation node for post-analysis query trees
1052 * After parse analysis, a SELECT with set operations is represented by a
1053 * top-level Query node containing the leaf SELECTs as subqueries in its
1054 * range table. Its setOperations field shows the tree of set operations,
1055 * with leaf SelectStmt nodes replaced by RangeTblRef nodes, and internal
1056 * nodes replaced by SetOperationStmt nodes. Information about the output
1057 * column types is added, too. (Note that the child nodes do not necessarily
1058 * produce these types directly, but we've checked that their output types
1059 * can be coerced to the output column type.) Also, if it's not UNION ALL,
1060 * information about the types' sort/group semantics is provided in the form
1061 * of a SortGroupClause list (same representation as, eg, DISTINCT).
1062 * The resolved common column collations are provided too; but note that if
1063 * it's not UNION ALL, it's okay for a column to not have a common collation,
1064 * so a member of the colCollations list could be InvalidOid even though the
1065 * column has a collatable type.
1066 * ----------------------
1068 typedef struct SetOperationStmt
1071 SetOperation op; /* type of set op */
1072 bool all; /* ALL specified? */
1073 Node *larg; /* left child */
1074 Node *rarg; /* right child */
1075 /* Eventually add fields for CORRESPONDING spec here */
1077 /* Fields derived during parse analysis: */
1078 List *colTypes; /* OID list of output column type OIDs */
1079 List *colTypmods; /* integer list of output column typmods */
1080 List *colCollations; /* OID list of output column collation OIDs */
1081 List *groupClauses; /* a list of SortGroupClause's */
1082 /* groupClauses is NIL if UNION ALL, but must be set otherwise */
1086 /*****************************************************************************
1087 * Other Statements (no optimizations required)
1089 * These are not touched by parser/analyze.c except to put them into
1090 * the utilityStmt field of a Query. This is eventually passed to
1091 * ProcessUtility (by-passing rewriting and planning). Some of the
1092 * statements do need attention from parse analysis, and this is
1093 * done by routines in parser/parse_utilcmd.c after ProcessUtility
1094 * receives the command for execution.
1095 *****************************************************************************/
1098 * When a command can act on several kinds of objects with only one
1099 * parse structure required, use these constants to designate the
1100 * object type. Note that commands typically don't support all the types.
1103 typedef enum ObjectType
1106 OBJECT_ATTRIBUTE, /* type's attribute, when distinct from column */
1116 OBJECT_FOREIGN_SERVER,
1117 OBJECT_FOREIGN_TABLE,
1132 OBJECT_TSCONFIGURATION,
1133 OBJECT_TSDICTIONARY,
1140 /* ----------------------
1141 * Create Schema Statement
1143 * NOTE: the schemaElts list contains raw parsetrees for component statements
1144 * of the schema, such as CREATE TABLE, GRANT, etc. These are analyzed and
1145 * executed after the schema itself is created.
1146 * ----------------------
1148 typedef struct CreateSchemaStmt
1151 char *schemaname; /* the name of the schema to create */
1152 char *authid; /* the owner of the created schema */
1153 List *schemaElts; /* schema components (list of parsenodes) */
1156 typedef enum DropBehavior
1158 DROP_RESTRICT, /* drop fails if any dependent objects */
1159 DROP_CASCADE /* remove dependent objects too */
1162 /* ----------------------
1164 * ----------------------
1166 typedef struct AlterTableStmt
1169 RangeVar *relation; /* table to work on */
1170 List *cmds; /* list of subcommands */
1171 ObjectType relkind; /* type of object */
1172 bool missing_ok; /* skip error if table missing */
1175 typedef enum AlterTableType
1177 AT_AddColumn, /* add column */
1178 AT_AddColumnRecurse, /* internal to commands/tablecmds.c */
1179 AT_AddColumnToView, /* implicitly via CREATE OR REPLACE VIEW */
1180 AT_ColumnDefault, /* alter column default */
1181 AT_DropNotNull, /* alter column drop not null */
1182 AT_SetNotNull, /* alter column set not null */
1183 AT_SetStatistics, /* alter column set statistics */
1184 AT_SetOptions, /* alter column set ( options ) */
1185 AT_ResetOptions, /* alter column reset ( options ) */
1186 AT_SetStorage, /* alter column set storage */
1187 AT_DropColumn, /* drop column */
1188 AT_DropColumnRecurse, /* internal to commands/tablecmds.c */
1189 AT_AddIndex, /* add index */
1190 AT_ReAddIndex, /* internal to commands/tablecmds.c */
1191 AT_AddConstraint, /* add constraint */
1192 AT_AddConstraintRecurse, /* internal to commands/tablecmds.c */
1193 AT_ValidateConstraint, /* validate constraint */
1194 AT_ValidateConstraintRecurse, /* internal to commands/tablecmds.c */
1195 AT_ProcessedConstraint, /* pre-processed add constraint (local in
1196 * parser/parse_utilcmd.c) */
1197 AT_AddIndexConstraint, /* add constraint using existing index */
1198 AT_DropConstraint, /* drop constraint */
1199 AT_DropConstraintRecurse, /* internal to commands/tablecmds.c */
1200 AT_AlterColumnType, /* alter column type */
1201 AT_AlterColumnGenericOptions, /* alter column OPTIONS (...) */
1202 AT_ChangeOwner, /* change owner */
1203 AT_ClusterOn, /* CLUSTER ON */
1204 AT_DropCluster, /* SET WITHOUT CLUSTER */
1205 AT_AddOids, /* SET WITH OIDS */
1206 AT_AddOidsRecurse, /* internal to commands/tablecmds.c */
1207 AT_DropOids, /* SET WITHOUT OIDS */
1208 AT_SetTableSpace, /* SET TABLESPACE */
1209 AT_SetRelOptions, /* SET (...) -- AM specific parameters */
1210 AT_ResetRelOptions, /* RESET (...) -- AM specific parameters */
1211 AT_ReplaceRelOptions, /* replace reloption list in its entirety */
1212 AT_EnableTrig, /* ENABLE TRIGGER name */
1213 AT_EnableAlwaysTrig, /* ENABLE ALWAYS TRIGGER name */
1214 AT_EnableReplicaTrig, /* ENABLE REPLICA TRIGGER name */
1215 AT_DisableTrig, /* DISABLE TRIGGER name */
1216 AT_EnableTrigAll, /* ENABLE TRIGGER ALL */
1217 AT_DisableTrigAll, /* DISABLE TRIGGER ALL */
1218 AT_EnableTrigUser, /* ENABLE TRIGGER USER */
1219 AT_DisableTrigUser, /* DISABLE TRIGGER USER */
1220 AT_EnableRule, /* ENABLE RULE name */
1221 AT_EnableAlwaysRule, /* ENABLE ALWAYS RULE name */
1222 AT_EnableReplicaRule, /* ENABLE REPLICA RULE name */
1223 AT_DisableRule, /* DISABLE RULE name */
1224 AT_AddInherit, /* INHERIT parent */
1225 AT_DropInherit, /* NO INHERIT parent */
1226 AT_AddOf, /* OF <type_name> */
1227 AT_DropOf, /* NOT OF */
1228 AT_GenericOptions /* OPTIONS (...) */
1231 typedef struct AlterTableCmd /* one subcommand of an ALTER TABLE */
1234 AlterTableType subtype; /* Type of table alteration to apply */
1235 char *name; /* column, constraint, or trigger to act on,
1236 * or new owner or tablespace */
1237 Node *def; /* definition of new column, index,
1238 * constraint, or parent table */
1239 DropBehavior behavior; /* RESTRICT or CASCADE for DROP cases */
1240 bool missing_ok; /* skip error if missing? */
1244 /* ----------------------
1247 * The fields are used in different ways by the different variants of
1249 * ----------------------
1251 typedef struct AlterDomainStmt
1254 char subtype; /*------------
1255 * T = alter column default
1256 * N = alter column drop not null
1257 * O = alter column set not null
1258 * C = add constraint
1259 * X = drop constraint
1262 List *typeName; /* domain to work on */
1263 char *name; /* column or constraint name to act on */
1264 Node *def; /* definition of default or constraint */
1265 DropBehavior behavior; /* RESTRICT or CASCADE for DROP cases */
1266 bool missing_ok; /* skip error if missing? */
1270 /* ----------------------
1271 * Grant|Revoke Statement
1272 * ----------------------
1274 typedef enum GrantTargetType
1276 ACL_TARGET_OBJECT, /* grant on specific named object(s) */
1277 ACL_TARGET_ALL_IN_SCHEMA, /* grant on all objects in given schema(s) */
1278 ACL_TARGET_DEFAULTS /* ALTER DEFAULT PRIVILEGES */
1281 typedef enum GrantObjectType
1283 ACL_OBJECT_COLUMN, /* column */
1284 ACL_OBJECT_RELATION, /* table, view */
1285 ACL_OBJECT_SEQUENCE, /* sequence */
1286 ACL_OBJECT_DATABASE, /* database */
1287 ACL_OBJECT_DOMAIN, /* domain */
1288 ACL_OBJECT_FDW, /* foreign-data wrapper */
1289 ACL_OBJECT_FOREIGN_SERVER, /* foreign server */
1290 ACL_OBJECT_FUNCTION, /* function */
1291 ACL_OBJECT_LANGUAGE, /* procedural language */
1292 ACL_OBJECT_LARGEOBJECT, /* largeobject */
1293 ACL_OBJECT_NAMESPACE, /* namespace */
1294 ACL_OBJECT_TABLESPACE, /* tablespace */
1295 ACL_OBJECT_TYPE /* type */
1298 typedef struct GrantStmt
1301 bool is_grant; /* true = GRANT, false = REVOKE */
1302 GrantTargetType targtype; /* type of the grant target */
1303 GrantObjectType objtype; /* kind of object being operated on */
1304 List *objects; /* list of RangeVar nodes, FuncWithArgs nodes,
1305 * or plain names (as Value strings) */
1306 List *privileges; /* list of AccessPriv nodes */
1307 /* privileges == NIL denotes ALL PRIVILEGES */
1308 List *grantees; /* list of PrivGrantee nodes */
1309 bool grant_option; /* grant or revoke grant option */
1310 DropBehavior behavior; /* drop behavior (for REVOKE) */
1313 typedef struct PrivGrantee
1316 char *rolname; /* if NULL then PUBLIC */
1320 * Note: FuncWithArgs carries only the types of the input parameters of the
1321 * function. So it is sufficient to identify an existing function, but it
1322 * is not enough info to define a function nor to call it.
1324 typedef struct FuncWithArgs
1327 List *funcname; /* qualified name of function */
1328 List *funcargs; /* list of Typename nodes */
1332 * An access privilege, with optional list of column names
1333 * priv_name == NULL denotes ALL PRIVILEGES (only used with a column list)
1334 * cols == NIL denotes "all columns"
1335 * Note that simple "ALL PRIVILEGES" is represented as a NIL list, not
1336 * an AccessPriv with both fields null.
1338 typedef struct AccessPriv
1341 char *priv_name; /* string name of privilege */
1342 List *cols; /* list of Value strings */
1345 /* ----------------------
1346 * Grant/Revoke Role Statement
1348 * Note: because of the parsing ambiguity with the GRANT <privileges>
1349 * statement, granted_roles is a list of AccessPriv; the execution code
1350 * should complain if any column lists appear. grantee_roles is a list
1351 * of role names, as Value strings.
1352 * ----------------------
1354 typedef struct GrantRoleStmt
1357 List *granted_roles; /* list of roles to be granted/revoked */
1358 List *grantee_roles; /* list of member roles to add/delete */
1359 bool is_grant; /* true = GRANT, false = REVOKE */
1360 bool admin_opt; /* with admin option */
1361 char *grantor; /* set grantor to other than current role */
1362 DropBehavior behavior; /* drop behavior (for REVOKE) */
1365 /* ----------------------
1366 * Alter Default Privileges Statement
1367 * ----------------------
1369 typedef struct AlterDefaultPrivilegesStmt
1372 List *options; /* list of DefElem */
1373 GrantStmt *action; /* GRANT/REVOKE action (with objects=NIL) */
1374 } AlterDefaultPrivilegesStmt;
1376 /* ----------------------
1379 * We support "COPY relation FROM file", "COPY relation TO file", and
1380 * "COPY (query) TO file". In any given CopyStmt, exactly one of "relation"
1381 * and "query" must be non-NULL.
1382 * ----------------------
1384 typedef struct CopyStmt
1387 RangeVar *relation; /* the relation to copy */
1388 Node *query; /* the SELECT query to copy */
1389 List *attlist; /* List of column names (as Strings), or NIL
1390 * for all columns */
1391 bool is_from; /* TO or FROM */
1392 char *filename; /* filename, or NULL for STDIN/STDOUT */
1393 List *options; /* List of DefElem nodes */
1396 /* ----------------------
1397 * SET Statement (includes RESET)
1399 * "SET var TO DEFAULT" and "RESET var" are semantically equivalent, but we
1400 * preserve the distinction in VariableSetKind for CreateCommandTag().
1401 * ----------------------
1405 VAR_SET_VALUE, /* SET var = value */
1406 VAR_SET_DEFAULT, /* SET var TO DEFAULT */
1407 VAR_SET_CURRENT, /* SET var FROM CURRENT */
1408 VAR_SET_MULTI, /* special case for SET TRANSACTION ... */
1409 VAR_RESET, /* RESET var */
1410 VAR_RESET_ALL /* RESET ALL */
1413 typedef struct VariableSetStmt
1416 VariableSetKind kind;
1417 char *name; /* variable to be set */
1418 List *args; /* List of A_Const nodes */
1419 bool is_local; /* SET LOCAL? */
1422 /* ----------------------
1424 * ----------------------
1426 typedef struct VariableShowStmt
1432 /* ----------------------
1433 * Create Table Statement
1435 * NOTE: in the raw gram.y output, ColumnDef and Constraint nodes are
1436 * intermixed in tableElts, and constraints is NIL. After parse analysis,
1437 * tableElts contains just ColumnDefs, and constraints contains just
1438 * Constraint nodes (in fact, only CONSTR_CHECK nodes, in the present
1440 * ----------------------
1443 typedef struct CreateStmt
1446 RangeVar *relation; /* relation to create */
1447 List *tableElts; /* column definitions (list of ColumnDef) */
1448 List *inhRelations; /* relations to inherit from (list of
1450 TypeName *ofTypename; /* OF typename */
1451 List *constraints; /* constraints (list of Constraint nodes) */
1452 List *options; /* options from WITH clause */
1453 OnCommitAction oncommit; /* what do we do at COMMIT? */
1454 char *tablespacename; /* table space to use, or NULL */
1455 bool if_not_exists; /* just do nothing if it already exists? */
1459 * Definitions for constraints in CreateStmt
1461 * Note that column defaults are treated as a type of constraint,
1462 * even though that's a bit odd semantically.
1464 * For constraints that use expressions (CONSTR_CHECK, CONSTR_DEFAULT)
1465 * we may have the expression in either "raw" form (an untransformed
1466 * parse tree) or "cooked" form (the nodeToString representation of
1467 * an executable expression tree), depending on how this Constraint
1468 * node was created (by parsing, or by inheritance from an existing
1469 * relation). We should never have both in the same node!
1471 * FKCONSTR_ACTION_xxx values are stored into pg_constraint.confupdtype
1472 * and pg_constraint.confdeltype columns; FKCONSTR_MATCH_xxx values are
1473 * stored into pg_constraint.confmatchtype. Changing the code values may
1474 * require an initdb!
1476 * If skip_validation is true then we skip checking that the existing rows
1477 * in the table satisfy the constraint, and just install the catalog entries
1478 * for the constraint. A new FK constraint is marked as valid iff
1479 * initially_valid is true. (Usually skip_validation and initially_valid
1480 * are inverses, but we can set both true if the table is known empty.)
1482 * Constraint attributes (DEFERRABLE etc) are initially represented as
1483 * separate Constraint nodes for simplicity of parsing. parse_utilcmd.c makes
1484 * a pass through the constraints list to insert the info into the appropriate
1489 typedef enum ConstrType /* types of constraints */
1491 CONSTR_NULL, /* not SQL92, but a lot of people expect it */
1499 CONSTR_ATTR_DEFERRABLE, /* attributes for previous constraint node */
1500 CONSTR_ATTR_NOT_DEFERRABLE,
1501 CONSTR_ATTR_DEFERRED,
1502 CONSTR_ATTR_IMMEDIATE
1505 /* Foreign key action codes */
1506 #define FKCONSTR_ACTION_NOACTION 'a'
1507 #define FKCONSTR_ACTION_RESTRICT 'r'
1508 #define FKCONSTR_ACTION_CASCADE 'c'
1509 #define FKCONSTR_ACTION_SETNULL 'n'
1510 #define FKCONSTR_ACTION_SETDEFAULT 'd'
1512 /* Foreign key matchtype codes */
1513 #define FKCONSTR_MATCH_FULL 'f'
1514 #define FKCONSTR_MATCH_PARTIAL 'p'
1515 #define FKCONSTR_MATCH_UNSPECIFIED 'u'
1517 typedef struct Constraint
1520 ConstrType contype; /* see above */
1522 /* Fields used for most/all constraint types: */
1523 char *conname; /* Constraint name, or NULL if unnamed */
1524 bool deferrable; /* DEFERRABLE? */
1525 bool initdeferred; /* INITIALLY DEFERRED? */
1526 int location; /* token location, or -1 if unknown */
1528 /* Fields used for constraints with expressions (CHECK and DEFAULT): */
1529 Node *raw_expr; /* expr, as untransformed parse tree */
1530 char *cooked_expr; /* expr, as nodeToString representation */
1532 /* Fields used for unique constraints (UNIQUE and PRIMARY KEY): */
1533 List *keys; /* String nodes naming referenced column(s) */
1535 /* Fields used for EXCLUSION constraints: */
1536 List *exclusions; /* list of (IndexElem, operator name) pairs */
1538 /* Fields used for index constraints (UNIQUE, PRIMARY KEY, EXCLUSION): */
1539 List *options; /* options from WITH clause */
1540 char *indexname; /* existing index to use; otherwise NULL */
1541 char *indexspace; /* index tablespace; NULL for default */
1542 /* These could be, but currently are not, used for UNIQUE/PKEY: */
1543 char *access_method; /* index access method; NULL for default */
1544 Node *where_clause; /* partial index predicate */
1546 /* Fields used for FOREIGN KEY constraints: */
1547 RangeVar *pktable; /* Primary key table */
1548 List *fk_attrs; /* Attributes of foreign key */
1549 List *pk_attrs; /* Corresponding attrs in PK table */
1550 char fk_matchtype; /* FULL, PARTIAL, UNSPECIFIED */
1551 char fk_upd_action; /* ON UPDATE action */
1552 char fk_del_action; /* ON DELETE action */
1553 List *old_conpfeqop; /* pg_constraint.conpfeqop of my former self */
1555 /* Fields used for constraints that allow a NOT VALID specification */
1556 bool skip_validation; /* skip validation of existing rows? */
1557 bool initially_valid; /* mark the new constraint as valid? */
1560 /* ----------------------
1561 * Create/Drop Table Space Statements
1562 * ----------------------
1565 typedef struct CreateTableSpaceStmt
1568 char *tablespacename;
1571 } CreateTableSpaceStmt;
1573 typedef struct DropTableSpaceStmt
1576 char *tablespacename;
1577 bool missing_ok; /* skip error if missing? */
1578 } DropTableSpaceStmt;
1580 typedef struct AlterTableSpaceOptionsStmt
1583 char *tablespacename;
1586 } AlterTableSpaceOptionsStmt;
1588 /* ----------------------
1589 * Create/Alter Extension Statements
1590 * ----------------------
1593 typedef struct CreateExtensionStmt
1597 bool if_not_exists; /* just do nothing if it already exists? */
1598 List *options; /* List of DefElem nodes */
1599 } CreateExtensionStmt;
1601 /* Only used for ALTER EXTENSION UPDATE; later might need an action field */
1602 typedef struct AlterExtensionStmt
1606 List *options; /* List of DefElem nodes */
1607 } AlterExtensionStmt;
1609 typedef struct AlterExtensionContentsStmt
1612 char *extname; /* Extension's name */
1613 int action; /* +1 = add object, -1 = drop object */
1614 ObjectType objtype; /* Object's type */
1615 List *objname; /* Qualified name of the object */
1616 List *objargs; /* Arguments if needed (eg, for functions) */
1617 } AlterExtensionContentsStmt;
1619 /* ----------------------
1620 * Create/Alter FOREIGN DATA WRAPPER Statements
1621 * ----------------------
1624 typedef struct CreateFdwStmt
1627 char *fdwname; /* foreign-data wrapper name */
1628 List *func_options; /* HANDLER/VALIDATOR options */
1629 List *options; /* generic options to FDW */
1632 typedef struct AlterFdwStmt
1635 char *fdwname; /* foreign-data wrapper name */
1636 List *func_options; /* HANDLER/VALIDATOR options */
1637 List *options; /* generic options to FDW */
1640 /* ----------------------
1641 * Create/Alter FOREIGN SERVER Statements
1642 * ----------------------
1645 typedef struct CreateForeignServerStmt
1648 char *servername; /* server name */
1649 char *servertype; /* optional server type */
1650 char *version; /* optional server version */
1651 char *fdwname; /* FDW name */
1652 List *options; /* generic options to server */
1653 } CreateForeignServerStmt;
1655 typedef struct AlterForeignServerStmt
1658 char *servername; /* server name */
1659 char *version; /* optional server version */
1660 List *options; /* generic options to server */
1661 bool has_version; /* version specified */
1662 } AlterForeignServerStmt;
1664 /* ----------------------
1665 * Create FOREIGN TABLE Statements
1666 * ----------------------
1669 typedef struct CreateForeignTableStmt
1674 } CreateForeignTableStmt;
1676 /* ----------------------
1677 * Create/Drop USER MAPPING Statements
1678 * ----------------------
1681 typedef struct CreateUserMappingStmt
1684 char *username; /* username or PUBLIC/CURRENT_USER */
1685 char *servername; /* server name */
1686 List *options; /* generic options to server */
1687 } CreateUserMappingStmt;
1689 typedef struct AlterUserMappingStmt
1692 char *username; /* username or PUBLIC/CURRENT_USER */
1693 char *servername; /* server name */
1694 List *options; /* generic options to server */
1695 } AlterUserMappingStmt;
1697 typedef struct DropUserMappingStmt
1700 char *username; /* username or PUBLIC/CURRENT_USER */
1701 char *servername; /* server name */
1702 bool missing_ok; /* ignore missing mappings */
1703 } DropUserMappingStmt;
1705 /* ----------------------
1706 * Create TRIGGER Statement
1707 * ----------------------
1709 typedef struct CreateTrigStmt
1712 char *trigname; /* TRIGGER's name */
1713 RangeVar *relation; /* relation trigger is on */
1714 List *funcname; /* qual. name of function to call */
1715 List *args; /* list of (T_String) Values or NIL */
1716 bool row; /* ROW/STATEMENT */
1717 /* timing uses the TRIGGER_TYPE bits defined in catalog/pg_trigger.h */
1718 int16 timing; /* BEFORE, AFTER, or INSTEAD */
1719 /* events uses the TRIGGER_TYPE bits defined in catalog/pg_trigger.h */
1720 int16 events; /* "OR" of INSERT/UPDATE/DELETE/TRUNCATE */
1721 List *columns; /* column names, or NIL for all columns */
1722 Node *whenClause; /* qual expression, or NULL if none */
1723 bool isconstraint; /* This is a constraint trigger */
1724 /* The remaining fields are only used for constraint triggers */
1725 bool deferrable; /* [NOT] DEFERRABLE */
1726 bool initdeferred; /* INITIALLY {DEFERRED|IMMEDIATE} */
1727 RangeVar *constrrel; /* opposite relation, if RI trigger */
1730 /* ----------------------
1731 * Create PROCEDURAL LANGUAGE Statements
1732 * ----------------------
1734 typedef struct CreatePLangStmt
1737 bool replace; /* T => replace if already exists */
1738 char *plname; /* PL name */
1739 List *plhandler; /* PL call handler function (qual. name) */
1740 List *plinline; /* optional inline function (qual. name) */
1741 List *plvalidator; /* optional validator function (qual. name) */
1742 bool pltrusted; /* PL is trusted */
1745 /* ----------------------
1746 * Create/Alter/Drop Role Statements
1748 * Note: these node types are also used for the backwards-compatible
1749 * Create/Alter/Drop User/Group statements. In the ALTER and DROP cases
1750 * there's really no need to distinguish what the original spelling was,
1751 * but for CREATE we mark the type because the defaults vary.
1752 * ----------------------
1754 typedef enum RoleStmtType
1761 typedef struct CreateRoleStmt
1764 RoleStmtType stmt_type; /* ROLE/USER/GROUP */
1765 char *role; /* role name */
1766 List *options; /* List of DefElem nodes */
1769 typedef struct AlterRoleStmt
1772 char *role; /* role name */
1773 List *options; /* List of DefElem nodes */
1774 int action; /* +1 = add members, -1 = drop members */
1777 typedef struct AlterRoleSetStmt
1780 char *role; /* role name */
1781 char *database; /* database name, or NULL */
1782 VariableSetStmt *setstmt; /* SET or RESET subcommand */
1785 typedef struct DropRoleStmt
1788 List *roles; /* List of roles to remove */
1789 bool missing_ok; /* skip error if a role is missing? */
1792 /* ----------------------
1793 * {Create|Alter} SEQUENCE Statement
1794 * ----------------------
1797 typedef struct CreateSeqStmt
1800 RangeVar *sequence; /* the sequence to create */
1802 Oid ownerId; /* ID of owner, or InvalidOid for default */
1805 typedef struct AlterSeqStmt
1808 RangeVar *sequence; /* the sequence to alter */
1810 bool missing_ok; /* skip error if a role is missing? */
1813 /* ----------------------
1814 * Create {Aggregate|Operator|Type} Statement
1815 * ----------------------
1817 typedef struct DefineStmt
1820 ObjectType kind; /* aggregate, operator, type */
1821 bool oldstyle; /* hack to signal old CREATE AGG syntax */
1822 List *defnames; /* qualified name (list of Value strings) */
1823 List *args; /* a list of TypeName (if needed) */
1824 List *definition; /* a list of DefElem */
1827 /* ----------------------
1828 * Create Domain Statement
1829 * ----------------------
1831 typedef struct CreateDomainStmt
1834 List *domainname; /* qualified name (list of Value strings) */
1835 TypeName *typeName; /* the base type */
1836 CollateClause *collClause; /* untransformed COLLATE spec, if any */
1837 List *constraints; /* constraints (list of Constraint nodes) */
1840 /* ----------------------
1841 * Create Operator Class Statement
1842 * ----------------------
1844 typedef struct CreateOpClassStmt
1847 List *opclassname; /* qualified name (list of Value strings) */
1848 List *opfamilyname; /* qualified name (ditto); NIL if omitted */
1849 char *amname; /* name of index AM opclass is for */
1850 TypeName *datatype; /* datatype of indexed column */
1851 List *items; /* List of CreateOpClassItem nodes */
1852 bool isDefault; /* Should be marked as default for type? */
1853 } CreateOpClassStmt;
1855 #define OPCLASS_ITEM_OPERATOR 1
1856 #define OPCLASS_ITEM_FUNCTION 2
1857 #define OPCLASS_ITEM_STORAGETYPE 3
1859 typedef struct CreateOpClassItem
1862 int itemtype; /* see codes above */
1863 /* fields used for an operator or function item: */
1864 List *name; /* operator or function name */
1865 List *args; /* argument types */
1866 int number; /* strategy num or support proc num */
1867 List *order_family; /* only used for ordering operators */
1868 List *class_args; /* only used for functions */
1869 /* fields used for a storagetype item: */
1870 TypeName *storedtype; /* datatype stored in index */
1871 } CreateOpClassItem;
1873 /* ----------------------
1874 * Create Operator Family Statement
1875 * ----------------------
1877 typedef struct CreateOpFamilyStmt
1880 List *opfamilyname; /* qualified name (list of Value strings) */
1881 char *amname; /* name of index AM opfamily is for */
1882 } CreateOpFamilyStmt;
1884 /* ----------------------
1885 * Alter Operator Family Statement
1886 * ----------------------
1888 typedef struct AlterOpFamilyStmt
1891 List *opfamilyname; /* qualified name (list of Value strings) */
1892 char *amname; /* name of index AM opfamily is for */
1893 bool isDrop; /* ADD or DROP the items? */
1894 List *items; /* List of CreateOpClassItem nodes */
1895 } AlterOpFamilyStmt;
1897 /* ----------------------
1898 * Drop Table|Sequence|View|Index|Type|Domain|Conversion|Schema Statement
1899 * ----------------------
1902 typedef struct DropStmt
1905 List *objects; /* list of sublists of names (as Values) */
1906 List *arguments; /* list of sublists of arguments (as Values) */
1907 ObjectType removeType; /* object type */
1908 DropBehavior behavior; /* RESTRICT or CASCADE behavior */
1909 bool missing_ok; /* skip error if object is missing? */
1912 /* ----------------------
1913 * Truncate Table Statement
1914 * ----------------------
1916 typedef struct TruncateStmt
1919 List *relations; /* relations (RangeVars) to be truncated */
1920 bool restart_seqs; /* restart owned sequences? */
1921 DropBehavior behavior; /* RESTRICT or CASCADE behavior */
1924 /* ----------------------
1925 * Comment On Statement
1926 * ----------------------
1928 typedef struct CommentStmt
1931 ObjectType objtype; /* Object's type */
1932 List *objname; /* Qualified name of the object */
1933 List *objargs; /* Arguments if needed (eg, for functions) */
1934 char *comment; /* Comment to insert, or NULL to remove */
1937 /* ----------------------
1938 * SECURITY LABEL Statement
1939 * ----------------------
1941 typedef struct SecLabelStmt
1944 ObjectType objtype; /* Object's type */
1945 List *objname; /* Qualified name of the object */
1946 List *objargs; /* Arguments if needed (eg, for functions) */
1947 char *provider; /* Label provider (or NULL) */
1948 char *label; /* New security label to be assigned */
1951 /* ----------------------
1952 * Declare Cursor Statement
1954 * Note: the "query" field of DeclareCursorStmt is only used in the raw grammar
1955 * output. After parse analysis it's set to null, and the Query points to the
1956 * DeclareCursorStmt, not vice versa.
1957 * ----------------------
1959 #define CURSOR_OPT_BINARY 0x0001 /* BINARY */
1960 #define CURSOR_OPT_SCROLL 0x0002 /* SCROLL explicitly given */
1961 #define CURSOR_OPT_NO_SCROLL 0x0004 /* NO SCROLL explicitly given */
1962 #define CURSOR_OPT_INSENSITIVE 0x0008 /* INSENSITIVE */
1963 #define CURSOR_OPT_HOLD 0x0010 /* WITH HOLD */
1964 /* these planner-control flags do not correspond to any SQL grammar: */
1965 #define CURSOR_OPT_FAST_PLAN 0x0020 /* prefer fast-start plan */
1966 #define CURSOR_OPT_GENERIC_PLAN 0x0040 /* force use of generic plan */
1967 #define CURSOR_OPT_CUSTOM_PLAN 0x0080 /* force use of custom plan */
1969 typedef struct DeclareCursorStmt
1972 char *portalname; /* name of the portal (cursor) */
1973 int options; /* bitmask of options (see above) */
1974 Node *query; /* the raw SELECT query */
1975 } DeclareCursorStmt;
1977 /* ----------------------
1978 * Close Portal Statement
1979 * ----------------------
1981 typedef struct ClosePortalStmt
1984 char *portalname; /* name of the portal (cursor) */
1985 /* NULL means CLOSE ALL */
1988 /* ----------------------
1989 * Fetch Statement (also Move)
1990 * ----------------------
1992 typedef enum FetchDirection
1994 /* for these, howMany is how many rows to fetch; FETCH_ALL means ALL */
1997 /* for these, howMany indicates a position; only one row is fetched */
2002 #define FETCH_ALL LONG_MAX
2004 typedef struct FetchStmt
2007 FetchDirection direction; /* see above */
2008 long howMany; /* number of rows, or position argument */
2009 char *portalname; /* name of portal (cursor) */
2010 bool ismove; /* TRUE if MOVE */
2013 /* ----------------------
2014 * Create Index Statement
2016 * This represents creation of an index and/or an associated constraint.
2017 * If indexOid isn't InvalidOid, we are not creating an index, just a
2018 * UNIQUE/PKEY constraint using an existing index. isconstraint must always
2019 * be true in this case, and the fields describing the index properties are
2021 * ----------------------
2023 typedef struct IndexStmt
2026 char *idxname; /* name of new index, or NULL for default */
2027 RangeVar *relation; /* relation to build index on */
2028 char *accessMethod; /* name of access method (eg. btree) */
2029 char *tableSpace; /* tablespace, or NULL for default */
2030 List *indexParams; /* a list of IndexElem */
2031 List *options; /* options from WITH clause */
2032 Node *whereClause; /* qualification (partial-index predicate) */
2033 List *excludeOpNames; /* exclusion operator names, or NIL if none */
2034 Oid indexOid; /* OID of an existing index, if any */
2035 Oid oldNode; /* relfilenode of my former self */
2036 bool unique; /* is index unique? */
2037 bool primary; /* is index on primary key? */
2038 bool isconstraint; /* is it from a CONSTRAINT clause? */
2039 bool deferrable; /* is the constraint DEFERRABLE? */
2040 bool initdeferred; /* is the constraint INITIALLY DEFERRED? */
2041 bool concurrent; /* should this be a concurrent index build? */
2044 /* ----------------------
2045 * Create Function Statement
2046 * ----------------------
2048 typedef struct CreateFunctionStmt
2051 bool replace; /* T => replace if already exists */
2052 List *funcname; /* qualified name of function to create */
2053 List *parameters; /* a list of FunctionParameter */
2054 TypeName *returnType; /* the return type */
2055 List *options; /* a list of DefElem */
2056 List *withClause; /* a list of DefElem */
2057 } CreateFunctionStmt;
2059 typedef enum FunctionParameterMode
2061 /* the assigned enum values appear in pg_proc, don't change 'em! */
2062 FUNC_PARAM_IN = 'i', /* input only */
2063 FUNC_PARAM_OUT = 'o', /* output only */
2064 FUNC_PARAM_INOUT = 'b', /* both */
2065 FUNC_PARAM_VARIADIC = 'v', /* variadic (always input) */
2066 FUNC_PARAM_TABLE = 't' /* table function output column */
2067 } FunctionParameterMode;
2069 typedef struct FunctionParameter
2072 char *name; /* parameter name, or NULL if not given */
2073 TypeName *argType; /* TypeName for parameter type */
2074 FunctionParameterMode mode; /* IN/OUT/etc */
2075 Node *defexpr; /* raw default expr, or NULL if not given */
2076 } FunctionParameter;
2078 typedef struct AlterFunctionStmt
2081 FuncWithArgs *func; /* name and args of function */
2082 List *actions; /* list of DefElem */
2083 } AlterFunctionStmt;
2085 /* ----------------------
2088 * DoStmt is the raw parser output, InlineCodeBlock is the execution-time API
2089 * ----------------------
2091 typedef struct DoStmt
2094 List *args; /* List of DefElem nodes */
2097 typedef struct InlineCodeBlock
2100 char *source_text; /* source text of anonymous code block */
2101 Oid langOid; /* OID of selected language */
2102 bool langIsTrusted; /* trusted property of the language */
2105 /* ----------------------
2106 * Alter Object Rename Statement
2107 * ----------------------
2109 typedef struct RenameStmt
2112 ObjectType renameType; /* OBJECT_TABLE, OBJECT_COLUMN, etc */
2113 ObjectType relationType; /* if column name, associated relation type */
2114 RangeVar *relation; /* in case it's a table */
2115 List *object; /* in case it's some other object */
2116 List *objarg; /* argument types, if applicable */
2117 char *subname; /* name of contained object (column, rule,
2119 char *newname; /* the new name */
2120 DropBehavior behavior; /* RESTRICT or CASCADE behavior */
2121 bool missing_ok; /* skip error if missing? */
2124 /* ----------------------
2125 * ALTER object SET SCHEMA Statement
2126 * ----------------------
2128 typedef struct AlterObjectSchemaStmt
2131 ObjectType objectType; /* OBJECT_TABLE, OBJECT_TYPE, etc */
2132 RangeVar *relation; /* in case it's a table */
2133 List *object; /* in case it's some other object */
2134 List *objarg; /* argument types, if applicable */
2135 char *addname; /* additional name if needed */
2136 char *newschema; /* the new schema */
2137 bool missing_ok; /* skip error if missing? */
2138 } AlterObjectSchemaStmt;
2140 /* ----------------------
2141 * Alter Object Owner Statement
2142 * ----------------------
2144 typedef struct AlterOwnerStmt
2147 ObjectType objectType; /* OBJECT_TABLE, OBJECT_TYPE, etc */
2148 RangeVar *relation; /* in case it's a table */
2149 List *object; /* in case it's some other object */
2150 List *objarg; /* argument types, if applicable */
2151 char *addname; /* additional name if needed */
2152 char *newowner; /* the new owner */
2156 /* ----------------------
2157 * Create Rule Statement
2158 * ----------------------
2160 typedef struct RuleStmt
2163 RangeVar *relation; /* relation the rule is for */
2164 char *rulename; /* name of the rule */
2165 Node *whereClause; /* qualifications */
2166 CmdType event; /* SELECT, INSERT, etc */
2167 bool instead; /* is a 'do instead'? */
2168 List *actions; /* the action statements */
2169 bool replace; /* OR REPLACE */
2172 /* ----------------------
2174 * ----------------------
2176 typedef struct NotifyStmt
2179 char *conditionname; /* condition name to notify */
2180 char *payload; /* the payload string, or NULL if none */
2183 /* ----------------------
2185 * ----------------------
2187 typedef struct ListenStmt
2190 char *conditionname; /* condition name to listen on */
2193 /* ----------------------
2194 * Unlisten Statement
2195 * ----------------------
2197 typedef struct UnlistenStmt
2200 char *conditionname; /* name to unlisten on, or NULL for all */
2203 /* ----------------------
2204 * {Begin|Commit|Rollback} Transaction Statement
2205 * ----------------------
2207 typedef enum TransactionStmtKind
2210 TRANS_STMT_START, /* semantically identical to BEGIN */
2212 TRANS_STMT_ROLLBACK,
2213 TRANS_STMT_SAVEPOINT,
2215 TRANS_STMT_ROLLBACK_TO,
2217 TRANS_STMT_COMMIT_PREPARED,
2218 TRANS_STMT_ROLLBACK_PREPARED
2219 } TransactionStmtKind;
2221 typedef struct TransactionStmt
2224 TransactionStmtKind kind; /* see above */
2225 List *options; /* for BEGIN/START and savepoint commands */
2226 char *gid; /* for two-phase-commit related commands */
2229 /* ----------------------
2230 * Create Type Statement, composite types
2231 * ----------------------
2233 typedef struct CompositeTypeStmt
2236 RangeVar *typevar; /* the composite type to be created */
2237 List *coldeflist; /* list of ColumnDef nodes */
2238 } CompositeTypeStmt;
2240 /* ----------------------
2241 * Create Type Statement, enum types
2242 * ----------------------
2244 typedef struct CreateEnumStmt
2247 List *typeName; /* qualified name (list of Value strings) */
2248 List *vals; /* enum values (list of Value strings) */
2251 /* ----------------------
2252 * Create Type Statement, range types
2253 * ----------------------
2255 typedef struct CreateRangeStmt
2258 List *typeName; /* qualified name (list of Value strings) */
2259 List *params; /* range parameters (list of DefElem) */
2262 /* ----------------------
2263 * Alter Type Statement, enum types
2264 * ----------------------
2266 typedef struct AlterEnumStmt
2269 List *typeName; /* qualified name (list of Value strings) */
2270 char *newVal; /* new enum value's name */
2271 char *newValNeighbor; /* neighboring enum value, if specified */
2272 bool newValIsAfter; /* place new enum value after neighbor? */
2275 /* ----------------------
2276 * Create View Statement
2277 * ----------------------
2279 typedef struct ViewStmt
2282 RangeVar *view; /* the view to be created */
2283 List *aliases; /* target column names */
2284 Node *query; /* the SELECT query */
2285 bool replace; /* replace an existing view? */
2286 List *options; /* options from WITH clause */
2289 /* ----------------------
2291 * ----------------------
2293 typedef struct LoadStmt
2296 char *filename; /* file to load */
2299 /* ----------------------
2300 * Createdb Statement
2301 * ----------------------
2303 typedef struct CreatedbStmt
2306 char *dbname; /* name of database to create */
2307 List *options; /* List of DefElem nodes */
2310 /* ----------------------
2312 * ----------------------
2314 typedef struct AlterDatabaseStmt
2317 char *dbname; /* name of database to alter */
2318 List *options; /* List of DefElem nodes */
2319 } AlterDatabaseStmt;
2321 typedef struct AlterDatabaseSetStmt
2324 char *dbname; /* database name */
2325 VariableSetStmt *setstmt; /* SET or RESET subcommand */
2326 } AlterDatabaseSetStmt;
2328 /* ----------------------
2330 * ----------------------
2332 typedef struct DropdbStmt
2335 char *dbname; /* database to drop */
2336 bool missing_ok; /* skip error if db is missing? */
2339 /* ----------------------
2340 * Cluster Statement (support pbrown's cluster index implementation)
2341 * ----------------------
2343 typedef struct ClusterStmt
2346 RangeVar *relation; /* relation being indexed, or NULL if all */
2347 char *indexname; /* original index defined */
2348 bool verbose; /* print progress info */
2351 /* ----------------------
2352 * Vacuum and Analyze Statements
2354 * Even though these are nominally two statements, it's convenient to use
2355 * just one node type for both. Note that at least one of VACOPT_VACUUM
2356 * and VACOPT_ANALYZE must be set in options. VACOPT_FREEZE is an internal
2357 * convenience for the grammar and is not examined at runtime --- the
2358 * freeze_min_age and freeze_table_age fields are what matter.
2359 * ----------------------
2361 typedef enum VacuumOption
2363 VACOPT_VACUUM = 1 << 0, /* do VACUUM */
2364 VACOPT_ANALYZE = 1 << 1, /* do ANALYZE */
2365 VACOPT_VERBOSE = 1 << 2, /* print progress info */
2366 VACOPT_FREEZE = 1 << 3, /* FREEZE option */
2367 VACOPT_FULL = 1 << 4, /* FULL (non-concurrent) vacuum */
2368 VACOPT_NOWAIT = 1 << 5 /* don't wait to get lock (autovacuum only) */
2371 typedef struct VacuumStmt
2374 int options; /* OR of VacuumOption flags */
2375 int freeze_min_age; /* min freeze age, or -1 to use default */
2376 int freeze_table_age; /* age at which to scan whole table */
2377 RangeVar *relation; /* single table to process, or NULL */
2378 List *va_cols; /* list of column names, or NIL for all */
2381 /* ----------------------
2384 * The "query" field is either a raw parse tree (SelectStmt, InsertStmt, etc)
2385 * or a Query node if parse analysis has been done. Note that rewriting and
2386 * planning of the query are always postponed until execution of EXPLAIN.
2387 * ----------------------
2389 typedef struct ExplainStmt
2392 Node *query; /* the query (see comments above) */
2393 List *options; /* list of DefElem nodes */
2396 /* ----------------------
2397 * CREATE TABLE AS Statement (a/k/a SELECT INTO)
2399 * A query written as CREATE TABLE AS will produce this node type natively.
2400 * A query written as SELECT ... INTO will be transformed to this form during
2403 * The "query" field is handled similarly to EXPLAIN, though note that it
2404 * can be a SELECT or an EXECUTE, but not other DML statements.
2405 * ----------------------
2407 typedef struct CreateTableAsStmt
2410 Node *query; /* the query (see comments above) */
2411 IntoClause *into; /* destination table */
2412 bool is_select_into; /* it was written as SELECT INTO */
2413 } CreateTableAsStmt;
2415 /* ----------------------
2416 * Checkpoint Statement
2417 * ----------------------
2419 typedef struct CheckPointStmt
2424 /* ----------------------
2426 * ----------------------
2429 typedef enum DiscardMode
2436 typedef struct DiscardStmt
2442 /* ----------------------
2444 * ----------------------
2446 typedef struct LockStmt
2449 List *relations; /* relations to lock */
2450 int mode; /* lock mode */
2451 bool nowait; /* no wait mode */
2454 /* ----------------------
2455 * SET CONSTRAINTS Statement
2456 * ----------------------
2458 typedef struct ConstraintsSetStmt
2461 List *constraints; /* List of names as RangeVars */
2463 } ConstraintsSetStmt;
2465 /* ----------------------
2467 * ----------------------
2469 typedef struct ReindexStmt
2472 ObjectType kind; /* OBJECT_INDEX, OBJECT_TABLE, OBJECT_DATABASE */
2473 RangeVar *relation; /* Table or index to reindex */
2474 const char *name; /* name of database to reindex */
2475 bool do_system; /* include system tables in database case */
2476 bool do_user; /* include user tables in database case */
2479 /* ----------------------
2480 * CREATE CONVERSION Statement
2481 * ----------------------
2483 typedef struct CreateConversionStmt
2486 List *conversion_name; /* Name of the conversion */
2487 char *for_encoding_name; /* source encoding name */
2488 char *to_encoding_name; /* destination encoding name */
2489 List *func_name; /* qualified conversion function name */
2490 bool def; /* is this a default conversion? */
2491 } CreateConversionStmt;
2493 /* ----------------------
2494 * CREATE CAST Statement
2495 * ----------------------
2497 typedef struct CreateCastStmt
2500 TypeName *sourcetype;
2501 TypeName *targettype;
2503 CoercionContext context;
2507 /* ----------------------
2509 * ----------------------
2511 typedef struct PrepareStmt
2514 char *name; /* Name of plan, arbitrary */
2515 List *argtypes; /* Types of parameters (List of TypeName) */
2516 Node *query; /* The query itself (as a raw parsetree) */
2520 /* ----------------------
2522 * ----------------------
2525 typedef struct ExecuteStmt
2528 char *name; /* The name of the plan to execute */
2529 List *params; /* Values to assign to parameters */
2533 /* ----------------------
2534 * DEALLOCATE Statement
2535 * ----------------------
2537 typedef struct DeallocateStmt
2540 char *name; /* The name of the plan to remove */
2541 /* NULL means DEALLOCATE ALL */
2545 * DROP OWNED statement
2547 typedef struct DropOwnedStmt
2551 DropBehavior behavior;
2555 * REASSIGN OWNED statement
2557 typedef struct ReassignOwnedStmt
2562 } ReassignOwnedStmt;
2565 * TS Dictionary stmts: DefineStmt, RenameStmt and DropStmt are default
2567 typedef struct AlterTSDictionaryStmt
2570 List *dictname; /* qualified name (list of Value strings) */
2571 List *options; /* List of DefElem nodes */
2572 } AlterTSDictionaryStmt;
2575 * TS Configuration stmts: DefineStmt, RenameStmt and DropStmt are default
2577 typedef struct AlterTSConfigurationStmt
2580 List *cfgname; /* qualified name (list of Value strings) */
2583 * dicts will be non-NIL if ADD/ALTER MAPPING was specified. If dicts is
2584 * NIL, but tokentype isn't, DROP MAPPING was specified.
2586 List *tokentype; /* list of Value strings */
2587 List *dicts; /* list of list of Value strings */
2588 bool override; /* if true - remove old variant */
2589 bool replace; /* if true - replace dictionary by another */
2590 bool missing_ok; /* for DROP - skip error if missing? */
2591 } AlterTSConfigurationStmt;
2593 #endif /* PARSENODES_H */