PostgreSQL Source Code  git master
Macros | Functions
nodeFuncs.c File Reference
#include "postgres.h"
#include "catalog/pg_collation.h"
#include "catalog/pg_type.h"
#include "miscadmin.h"
#include "nodes/execnodes.h"
#include "nodes/makefuncs.h"
#include "nodes/nodeFuncs.h"
#include "nodes/pathnodes.h"
#include "utils/builtins.h"
#include "utils/lsyscache.h"
Include dependency graph for nodeFuncs.c:

Go to the source code of this file.

Macros

#define FLATCOPY(newnode, node, nodetype)
 
#define CHECKFLATCOPY(newnode, node, nodetype)
 
#define MUTATE(newfield, oldfield, fieldtype)   ( (newfield) = (fieldtype) mutator((Node *) (oldfield), context) )
 

Functions

static bool expression_returns_set_walker (Node *node, void *context)
 
static int leftmostLoc (int loc1, int loc2)
 
static bool fix_opfuncids_walker (Node *node, void *context)
 
static bool planstate_walk_subplans (List *plans, bool(*walker)(), void *context)
 
static bool planstate_walk_members (PlanState **planstates, int nplans, bool(*walker)(), void *context)
 
Oid exprType (const Node *expr)
 
int32 exprTypmod (const Node *expr)
 
bool exprIsLengthCoercion (const Node *expr, int32 *coercedTypmod)
 
Node * applyRelabelType (Node *arg, Oid rtype, int32 rtypmod, Oid rcollid, CoercionForm rformat, int rlocation, bool overwrite_ok)
 
Node * relabel_to_typmod (Node *expr, int32 typmod)
 
Node * strip_implicit_coercions (Node *node)
 
bool expression_returns_set (Node *clause)
 
Oid exprCollation (const Node *expr)
 
Oid exprInputCollation (const Node *expr)
 
void exprSetCollation (Node *expr, Oid collation)
 
void exprSetInputCollation (Node *expr, Oid inputcollation)
 
int exprLocation (const Node *expr)
 
void fix_opfuncids (Node *node)
 
void set_opfuncid (OpExpr *opexpr)
 
void set_sa_opfuncid (ScalarArrayOpExpr *opexpr)
 
bool check_functions_in_node (Node *node, check_function_callback checker, void *context)
 
bool expression_tree_walker (Node *node, bool(*walker)(), void *context)
 
bool query_tree_walker (Query *query, bool(*walker)(), void *context, int flags)
 
bool range_table_walker (List *rtable, bool(*walker)(), void *context, int flags)
 
bool range_table_entry_walker (RangeTblEntry *rte, bool(*walker)(), void *context, int flags)
 
Node * expression_tree_mutator (Node *node, Node *(*mutator)(), void *context)
 
Query * query_tree_mutator (Query *query, Node *(*mutator)(), void *context, int flags)
 
List * range_table_mutator (List *rtable, Node *(*mutator)(), void *context, int flags)
 
bool query_or_expression_tree_walker (Node *node, bool(*walker)(), void *context, int flags)
 
Node * query_or_expression_tree_mutator (Node *node, Node *(*mutator)(), void *context, int flags)
 
bool raw_expression_tree_walker (Node *node, bool(*walker)(), void *context)
 
bool planstate_tree_walker (PlanState *planstate, bool(*walker)(), void *context)
 

Macro Definition Documentation

◆ CHECKFLATCOPY

#define CHECKFLATCOPY (   newnode,
  node,
  nodetype 
)
Value:
( AssertMacro(IsA((node), nodetype)), \
(newnode) = (nodetype *) palloc(sizeof(nodetype)), \
memcpy((newnode), (node), sizeof(nodetype)) )
IsA
#define IsA(nodeptr, _type_)
Definition: nodes.h:590
AssertMacro
#define AssertMacro(condition)
Definition: c.h:805
palloc
void * palloc(Size size)
Definition: mcxt.c:1062

Referenced by range_table_mutator().

◆ FLATCOPY

#define FLATCOPY (   newnode,
  node,
  nodetype 
)
Value:
( (newnode) = (nodetype *) palloc(sizeof(nodetype)), \
memcpy((newnode), (node), sizeof(nodetype)) )
palloc
void * palloc(Size size)
Definition: mcxt.c:1062

Referenced by expression_tree_mutator(), query_tree_mutator(), and range_table_mutator().

◆ MUTATE

#define MUTATE (   newfield,
  oldfield,
  fieldtype 
)    ( (newfield) = (fieldtype) mutator((Node *) (oldfield), context) )

Referenced by expression_tree_mutator(), query_tree_mutator(), and range_table_mutator().

Function Documentation

◆ applyRelabelType()

Node* applyRelabelType ( Node *  arg,
Oid  rtype,
int32  rtypmod,
Oid  rcollid,
CoercionForm  rformat,
int  rlocation,
bool  overwrite_ok 
)

Definition at line 582 of file nodeFuncs.c.

References arg, RelabelType::arg, Const::constcollid, Const::consttype, Const::consttypmod, copyObject, exprCollation(), exprType(), exprTypmod(), IsA, RelabelType::location, makeNode, RelabelType::relabelformat, RelabelType::resultcollid, RelabelType::resulttype, and RelabelType::resulttypmod.

Referenced by canonicalize_ec_expression(), eval_const_expressions_mutator(), generate_setop_tlist(), and relabel_to_typmod().

584 {
585  /*
586  * If we find stacked RelabelTypes (eg, from foo::int::oid) we can discard
587  * all but the top one, and must do so to ensure that semantically
588  * equivalent expressions are equal().
589  */
590  while (arg && IsA(arg, RelabelType))
591  arg = (Node *) ((RelabelType *) arg)->arg;
592 
593  if (arg && IsA(arg, Const))
594  {
595  /* Modify the Const directly to preserve const-flatness. */
596  Const *con = (Const *) arg;
597 
598  if (!overwrite_ok)
599  con = copyObject(con);
600  con->consttype = rtype;
601  con->consttypmod = rtypmod;
602  con->constcollid = rcollid;
603  /* We keep the Const's original location. */
604  return (Node *) con;
605  }
606  else if (exprType(arg) == rtype &&
607  exprTypmod(arg) == rtypmod &&
608  exprCollation(arg) == rcollid)
609  {
610  /* Sometimes we find a nest of relabels that net out to nothing. */
611  return arg;
612  }
613  else
614  {
615  /* Nope, gotta have a RelabelType. */
616  RelabelType *newrelabel = makeNode(RelabelType);
617 
618  newrelabel->arg = (Expr *) arg;
619  newrelabel->resulttype = rtype;
620  newrelabel->resulttypmod = rtypmod;
621  newrelabel->resultcollid = rcollid;
622  newrelabel->relabelformat = rformat;
623  newrelabel->location = rlocation;
624  return (Node *) newrelabel;
625  }
626 }
IsA
#define IsA(nodeptr, _type_)
Definition: nodes.h:590
exprTypmod
int32 exprTypmod(const Node *expr)
Definition: nodeFuncs.c:267
RelabelType::arg
Expr * arg
Definition: primnodes.h:850
Node
Definition: nodes.h:539
Const::consttype
Oid consttype
Definition: primnodes.h:215
Const::constcollid
Oid constcollid
Definition: primnodes.h:217
RelabelType::resulttype
Oid resulttype
Definition: primnodes.h:851
RelabelType::resultcollid
Oid resultcollid
Definition: primnodes.h:853
makeNode
#define makeNode(_type_)
Definition: nodes.h:587
exprType
Oid exprType(const Node *expr)
Definition: nodeFuncs.c:41
exprCollation
Oid exprCollation(const Node *expr)
Definition: nodeFuncs.c:759
Const::consttypmod
int32 consttypmod
Definition: primnodes.h:216
arg
void * arg
Definition: pg_backup_utils.c:27
RelabelType::resulttypmod
int32 resulttypmod
Definition: primnodes.h:852
copyObject
#define copyObject(obj)
Definition: nodes.h:655
RelabelType::relabelformat
CoercionForm relabelformat
Definition: primnodes.h:854
RelabelType::location
int location
Definition: primnodes.h:855

◆ check_functions_in_node()

bool check_functions_in_node ( Node *  node,
check_function_callback  checker,
void *  context 
)

Definition at line 1721 of file nodeFuncs.c.

References Aggref::aggfnoid, CoerceViaIO::arg, exprType(), FuncExpr::funcid, get_opcode(), getTypeInputInfo(), getTypeOutputInfo(), lfirst_oid, nodeTag, OpExpr::opfuncid, ScalarArrayOpExpr::opfuncid, RowCompareExpr::opnos, CoerceViaIO::resulttype, set_opfuncid(), set_sa_opfuncid(), T_Aggref, T_CoerceViaIO, T_DistinctExpr, T_FuncExpr, T_NullIfExpr, T_OpExpr, T_RowCompareExpr, T_ScalarArrayOpExpr, T_WindowFunc, and WindowFunc::winfnoid.

Referenced by contain_leaked_vars_walker(), contain_mutable_functions_walker(), contain_nonstrict_functions_walker(), contain_volatile_functions_not_nextval_walker(), contain_volatile_functions_walker(), get_notclausearg(), and max_parallel_hazard_walker().

1723 {
1724  switch (nodeTag(node))
1725  {
1726  case T_Aggref:
1727  {
1728  Aggref *expr = (Aggref *) node;
1729 
1730  if (checker(expr->aggfnoid, context))
1731  return true;
1732  }
1733  break;
1734  case T_WindowFunc:
1735  {
1736  WindowFunc *expr = (WindowFunc *) node;
1737 
1738  if (checker(expr->winfnoid, context))
1739  return true;
1740  }
1741  break;
1742  case T_FuncExpr:
1743  {
1744  FuncExpr *expr = (FuncExpr *) node;
1745 
1746  if (checker(expr->funcid, context))
1747  return true;
1748  }
1749  break;
1750  case T_OpExpr:
1751  case T_DistinctExpr: /* struct-equivalent to OpExpr */
1752  case T_NullIfExpr: /* struct-equivalent to OpExpr */
1753  {
1754  OpExpr *expr = (OpExpr *) node;
1755 
1756  /* Set opfuncid if it wasn't set already */
1757  set_opfuncid(expr);
1758  if (checker(expr->opfuncid, context))
1759  return true;
1760  }
1761  break;
1762  case T_ScalarArrayOpExpr:
1763  {
1764  ScalarArrayOpExpr *expr = (ScalarArrayOpExpr *) node;
1765 
1766  set_sa_opfuncid(expr);
1767  if (checker(expr->opfuncid, context))
1768  return true;
1769  }
1770  break;
1771  case T_CoerceViaIO:
1772  {
1773  CoerceViaIO *expr = (CoerceViaIO *) node;
1774  Oid iofunc;
1775  Oid typioparam;
1776  bool typisvarlena;
1777 
1778  /* check the result type's input function */
1779  getTypeInputInfo(expr->resulttype,
1780  &iofunc, &typioparam);
1781  if (checker(iofunc, context))
1782  return true;
1783  /* check the input type's output function */
1784  getTypeOutputInfo(exprType((Node *) expr->arg),
1785  &iofunc, &typisvarlena);
1786  if (checker(iofunc, context))
1787  return true;
1788  }
1789  break;
1790  case T_RowCompareExpr:
1791  {
1792  RowCompareExpr *rcexpr = (RowCompareExpr *) node;
1793  ListCell *opid;
1794 
1795  foreach(opid, rcexpr->opnos)
1796  {
1797  Oid opfuncid = get_opcode(lfirst_oid(opid));
1798 
1799  if (checker(opfuncid, context))
1800  return true;
1801  }
1802  }
1803  break;
1804  default:
1805  break;
1806  }
1807  return false;
1808 }
getTypeOutputInfo
void getTypeOutputInfo(Oid type, Oid *typOutput, bool *typIsVarlena)
Definition: lsyscache.c:2854
CoerceViaIO::resulttype
Oid resulttype
Definition: primnodes.h:871
Node
Definition: nodes.h:539
Oid
unsigned int Oid
Definition: postgres_ext.h:31
FuncExpr::funcid
Oid funcid
Definition: primnodes.h:495
WindowFunc::winfnoid
Oid winfnoid
Definition: primnodes.h:386
CoerceViaIO::arg
Expr * arg
Definition: primnodes.h:870
getTypeInputInfo
void getTypeInputInfo(Oid type, Oid *typInput, Oid *typIOParam)
Definition: lsyscache.c:2821
OpExpr::opfuncid
Oid opfuncid
Definition: primnodes.h:543
get_opcode
RegProcedure get_opcode(Oid opno)
Definition: lsyscache.c:1256
Aggref::aggfnoid
Oid aggfnoid
Definition: primnodes.h:323
exprType
Oid exprType(const Node *expr)
Definition: nodeFuncs.c:41
nodeTag
#define nodeTag(nodeptr)
Definition: nodes.h:544
set_opfuncid
void set_opfuncid(OpExpr *opexpr)
Definition: nodeFuncs.c:1683
set_sa_opfuncid
void set_sa_opfuncid(ScalarArrayOpExpr *opexpr)
Definition: nodeFuncs.c:1694
lfirst_oid
#define lfirst_oid(lc)
Definition: pg_list.h:171

◆ exprCollation()

Oid exprCollation ( const Node *  expr)

Definition at line 759 of file nodeFuncs.c.

References arg, ARRAY_SUBLINK, Assert, elog, ERROR, EXPR_SUBLINK, exprCollation(), SubPlan::firstColCollation, InvalidOid, IS_XMLSERIALIZE, IsA, linitial, linitial_node, nodeTag, SubLink::subLinkType, SubPlan::subLinkType, AlternativeSubPlan::subplans, SubLink::subselect, T_Aggref, T_AlternativeSubPlan, T_ArrayCoerceExpr, T_ArrayExpr, T_BooleanTest, T_BoolExpr, T_CaseExpr, T_CaseTestExpr, T_CoalesceExpr, T_CoerceToDomain, T_CoerceToDomainValue, T_CoerceViaIO, T_CollateExpr, T_Const, T_ConvertRowtypeExpr, T_CurrentOfExpr, T_DistinctExpr, T_FieldSelect, T_FieldStore, T_FuncExpr, T_GroupingFunc, T_InferenceElem, T_MinMaxExpr, T_NamedArgExpr, T_NextValueExpr, T_NullIfExpr, T_NullTest, T_OpExpr, T_Param, T_PlaceHolderVar, T_RelabelType, T_RowCompareExpr, T_RowExpr, T_ScalarArrayOpExpr, T_SetToDefault, T_SQLValueFunction, T_SubLink, T_SubPlan, T_SubscriptingRef, T_Var, T_WindowFunc, T_XmlExpr, Query::targetList, and generate_unaccent_rules::type.

Referenced by addRangeTableEntryForFunction(), addRangeTableEntryForSubquery(), analyzeCTE(), analyzeCTETargetList(), applyRelabelType(), assign_collations_walker(), assign_hypothetical_collations(), build_expression_pathkey(), build_pertrans_for_aggref(), build_subplan(), canonicalize_ec_expression(), ComputeIndexAttrs(), ComputePartitionAttrs(), convert_EXISTS_to_ANY(), create_ctas_nodata(), create_limit_plan(), create_resultcache_plan(), create_unique_plan(), create_windowagg_plan(), DefineVirtualRelation(), eval_const_expressions_mutator(), examine_attribute(), examine_expression(), ExecInitFunctionScan(), ExecInitIndexScan(), ExecTypeFromExprList(), ExecTypeFromTLInternal(), expandRecordVariable(), expandRTE(), exprCollation(), exprSetCollation(), extract_grouping_collations(), fix_indexqual_operand(), generate_setop_tlist(), generate_subquery_params(), get_expr_result_type(), get_first_col_type(), inline_function(), make_pathkey_from_sortop(), make_recursive_union(), make_setop(), make_sort_from_groupcols(), make_sort_from_sortclauses(), make_unique_from_sortclauses(), makeVarFromTargetEntry(), makeWholeRowVar(), mcv_match_expression(), ordered_set_startup(), pg_get_indexdef_worker(), pg_get_partkeydef_worker(), preprocess_minmax_aggregates(), relabel_to_typmod(), RelationBuildPartitionKey(), RelationGetDummyIndexExpressions(), remove_unused_subquery_outputs(), replace_nestloop_param_placeholdervar(), replace_outer_placeholdervar(), scalararraysel(), set_dummy_tlist_references(), set_joinrel_partition_key_exprs(), tlist_same_collations(), transformCaseExpr(), transformFromClauseItem(), transformMultiAssignRef(), transformPLAssignStmt(), transformSubLink(), and transformWindowDefinitions().

760 {
761  Oid coll;
762 
763  if (!expr)
764  return InvalidOid;
765 
766  switch (nodeTag(expr))
767  {
768  case T_Var:
769  coll = ((const Var *) expr)->varcollid;
770  break;
771  case T_Const:
772  coll = ((const Const *) expr)->constcollid;
773  break;
774  case T_Param:
775  coll = ((const Param *) expr)->paramcollid;
776  break;
777  case T_Aggref:
778  coll = ((const Aggref *) expr)->aggcollid;
779  break;
780  case T_GroupingFunc:
781  coll = InvalidOid;
782  break;
783  case T_WindowFunc:
784  coll = ((const WindowFunc *) expr)->wincollid;
785  break;
786  case T_SubscriptingRef:
787  coll = ((const SubscriptingRef *) expr)->refcollid;
788  break;
789  case T_FuncExpr:
790  coll = ((const FuncExpr *) expr)->funccollid;
791  break;
792  case T_NamedArgExpr:
793  coll = exprCollation((Node *) ((const NamedArgExpr *) expr)->arg);
794  break;
795  case T_OpExpr:
796  coll = ((const OpExpr *) expr)->opcollid;
797  break;
798  case T_DistinctExpr:
799  coll = ((const DistinctExpr *) expr)->opcollid;
800  break;
801  case T_NullIfExpr:
802  coll = ((const NullIfExpr *) expr)->opcollid;
803  break;
804  case T_ScalarArrayOpExpr:
805  /* ScalarArrayOpExpr's result is boolean ... */
806  coll = InvalidOid; /* ... so it has no collation */
807  break;
808  case T_BoolExpr:
809  /* BoolExpr's result is boolean ... */
810  coll = InvalidOid; /* ... so it has no collation */
811  break;
812  case T_SubLink:
813  {
814  const SubLink *sublink = (const SubLink *) expr;
815 
816  if (sublink->subLinkType == EXPR_SUBLINK ||
817  sublink->subLinkType == ARRAY_SUBLINK)
818  {
819  /* get the collation of subselect's first target column */
820  Query *qtree = (Query *) sublink->subselect;
821  TargetEntry *tent;
822 
823  if (!qtree || !IsA(qtree, Query))
824  elog(ERROR, "cannot get collation for untransformed sublink");
825  tent = linitial_node(TargetEntry, qtree->targetList);
826  Assert(!tent->resjunk);
827  coll = exprCollation((Node *) tent->expr);
828  /* collation doesn't change if it's converted to array */
829  }
830  else
831  {
832  /* otherwise, SubLink's result is RECORD or BOOLEAN */
833  coll = InvalidOid; /* ... so it has no collation */
834  }
835  }
836  break;
837  case T_SubPlan:
838  {
839  const SubPlan *subplan = (const SubPlan *) expr;
840 
841  if (subplan->subLinkType == EXPR_SUBLINK ||
842  subplan->subLinkType == ARRAY_SUBLINK)
843  {
844  /* get the collation of subselect's first target column */
845  coll = subplan->firstColCollation;
846  /* collation doesn't change if it's converted to array */
847  }
848  else
849  {
850  /* otherwise, SubPlan's result is RECORD or BOOLEAN */
851  coll = InvalidOid; /* ... so it has no collation */
852  }
853  }
854  break;
855  case T_AlternativeSubPlan:
856  {
857  const AlternativeSubPlan *asplan = (const AlternativeSubPlan *) expr;
858 
859  /* subplans should all return the same thing */
860  coll = exprCollation((Node *) linitial(asplan->subplans));
861  }
862  break;
863  case T_FieldSelect:
864  coll = ((const FieldSelect *) expr)->resultcollid;
865  break;
866  case T_FieldStore:
867  /* FieldStore's result is composite ... */
868  coll = InvalidOid; /* ... so it has no collation */
869  break;
870  case T_RelabelType:
871  coll = ((const RelabelType *) expr)->resultcollid;
872  break;
873  case T_CoerceViaIO:
874  coll = ((const CoerceViaIO *) expr)->resultcollid;
875  break;
876  case T_ArrayCoerceExpr:
877  coll = ((const ArrayCoerceExpr *) expr)->resultcollid;
878  break;
879  case T_ConvertRowtypeExpr:
880  /* ConvertRowtypeExpr's result is composite ... */
881  coll = InvalidOid; /* ... so it has no collation */
882  break;
883  case T_CollateExpr:
884  coll = ((const CollateExpr *) expr)->collOid;
885  break;
886  case T_CaseExpr:
887  coll = ((const CaseExpr *) expr)->casecollid;
888  break;
889  case T_CaseTestExpr:
890  coll = ((const CaseTestExpr *) expr)->collation;
891  break;
892  case T_ArrayExpr:
893  coll = ((const ArrayExpr *) expr)->array_collid;
894  break;
895  case T_RowExpr:
896  /* RowExpr's result is composite ... */
897  coll = InvalidOid; /* ... so it has no collation */
898  break;
899  case T_RowCompareExpr:
900  /* RowCompareExpr's result is boolean ... */
901  coll = InvalidOid; /* ... so it has no collation */
902  break;
903  case T_CoalesceExpr:
904  coll = ((const CoalesceExpr *) expr)->coalescecollid;
905  break;
906  case T_MinMaxExpr:
907  coll = ((const MinMaxExpr *) expr)->minmaxcollid;
908  break;
909  case T_SQLValueFunction:
910  /* Returns either NAME or a non-collatable type */
911  if (((const SQLValueFunction *) expr)->type == NAMEOID)
912  coll = C_COLLATION_OID;
913  else
914  coll = InvalidOid;
915  break;
916  case T_XmlExpr:
917 
918  /*
919  * XMLSERIALIZE returns text from non-collatable inputs, so its
920  * collation is always default. The other cases return boolean or
921  * XML, which are non-collatable.
922  */
923  if (((const XmlExpr *) expr)->op == IS_XMLSERIALIZE)
924  coll = DEFAULT_COLLATION_OID;
925  else
926  coll = InvalidOid;
927  break;
928  case T_NullTest:
929  /* NullTest's result is boolean ... */
930  coll = InvalidOid; /* ... so it has no collation */
931  break;
932  case T_BooleanTest:
933  /* BooleanTest's result is boolean ... */
934  coll = InvalidOid; /* ... so it has no collation */
935  break;
936  case T_CoerceToDomain:
937  coll = ((const CoerceToDomain *) expr)->resultcollid;
938  break;
939  case T_CoerceToDomainValue:
940  coll = ((const CoerceToDomainValue *) expr)->collation;
941  break;
942  case T_SetToDefault:
943  coll = ((const SetToDefault *) expr)->collation;
944  break;
945  case T_CurrentOfExpr:
946  /* CurrentOfExpr's result is boolean ... */
947  coll = InvalidOid; /* ... so it has no collation */
948  break;
949  case T_NextValueExpr:
950  /* NextValueExpr's result is an integer type ... */
951  coll = InvalidOid; /* ... so it has no collation */
952  break;
953  case T_InferenceElem:
954  coll = exprCollation((Node *) ((const InferenceElem *) expr)->expr);
955  break;
956  case T_PlaceHolderVar:
957  coll = exprCollation((Node *) ((const PlaceHolderVar *) expr)->phexpr);
958  break;
959  default:
960  elog(ERROR, "unrecognized node type: %d", (int) nodeTag(expr));
961  coll = InvalidOid; /* keep compiler quiet */
962  break;
963  }
964  return coll;
965 }
IsA
#define IsA(nodeptr, _type_)
Definition: nodes.h:590
SubPlan::subLinkType
SubLinkType subLinkType
Definition: primnodes.h:737
Node
Definition: nodes.h:539
generate_unaccent_rules.type
type
Definition: generate_unaccent_rules.py:282
Oid
unsigned int Oid
Definition: postgres_ext.h:31
Var
Definition: primnodes.h:186
linitial_node
#define linitial_node(type, l)
Definition: pg_list.h:177
Query::targetList
List * targetList
Definition: parsenodes.h:150
linitial
#define linitial(l)
Definition: pg_list.h:174
ERROR
#define ERROR
Definition: elog.h:46
T_Const
Definition: nodes.h:158
T_Var
Definition: nodes.h:157
InvalidOid
#define InvalidOid
Definition: postgres_ext.h:36
Assert
#define Assert(condition)
Definition: c.h:804
exprCollation
Oid exprCollation(const Node *expr)
Definition: nodeFuncs.c:759
nodeTag
#define nodeTag(nodeptr)
Definition: nodes.h:544
elog
#define elog(elevel,...)
Definition: elog.h:232
arg
void * arg
Definition: pg_backup_utils.c:27
SubPlan::firstColCollation
Oid firstColCollation
Definition: primnodes.h:748
T_Param
Definition: nodes.h:159

◆ expression_returns_set()

bool expression_returns_set ( Node *  clause)

Definition at line 709 of file nodeFuncs.c.

References expression_returns_set_walker().

Referenced by check_output_expressions(), coerce_to_boolean(), coerce_to_specific_type_typmod(), ExecInitProjectSet(), get_eclass_for_sort_expr(), is_simple_values(), make_row_comparison_op(), make_sort_input_target(), remove_unused_subquery_outputs(), and subquery_planner().

710 {
711  return expression_returns_set_walker(clause, NULL);
712 }
expression_returns_set_walker
static bool expression_returns_set_walker(Node *node, void *context)
Definition: nodeFuncs.c:715

◆ expression_returns_set_walker()

static bool expression_returns_set_walker ( Node *  node,
void *  context 
)
static

Definition at line 715 of file nodeFuncs.c.

References expression_tree_walker(), FuncExpr::funcretset, IsA, and OpExpr::opretset.

Referenced by expression_returns_set().

716 {
717  if (node == NULL)
718  return false;
719  if (IsA(node, FuncExpr))
720  {
721  FuncExpr *expr = (FuncExpr *) node;
722 
723  if (expr->funcretset)
724  return true;
725  /* else fall through to check args */
726  }
727  if (IsA(node, OpExpr))
728  {
729  OpExpr *expr = (OpExpr *) node;
730 
731  if (expr->opretset)
732  return true;
733  /* else fall through to check args */
734  }
735 
736  /* Avoid recursion for some cases that parser checks not to return a set */
737  if (IsA(node, Aggref))
738  return false;
739  if (IsA(node, WindowFunc))
740  return false;
741 
742  return expression_tree_walker(node, expression_returns_set_walker,
743  context);
744 }
IsA
#define IsA(nodeptr, _type_)
Definition: nodes.h:590
expression_returns_set_walker
static bool expression_returns_set_walker(Node *node, void *context)
Definition: nodeFuncs.c:715
FuncExpr::funcretset
bool funcretset
Definition: primnodes.h:497
expression_tree_walker
bool expression_tree_walker(Node *node, bool(*walker)(), void *context)
Definition: nodeFuncs.c:1904
OpExpr::opretset
bool opretset
Definition: primnodes.h:545

◆ expression_tree_mutator()

Node* expression_tree_mutator ( Node *  node,
Node *(*)()  mutator,
void *  context 
)

Definition at line 2598 of file nodeFuncs.c.

References Aggref::aggargtypes, Aggref::aggdirectargs, Aggref::aggdistinct, Aggref::aggfilter, WindowFunc::aggfilter, Aggref::aggorder, OnConflictExpr::arbiterElems, OnConflictExpr::arbiterWhere, NamedArgExpr::arg, FieldSelect::arg, FieldStore::arg, RelabelType::arg, CoerceViaIO::arg, ArrayCoerceExpr::arg, ConvertRowtypeExpr::arg, CollateExpr::arg, CaseExpr::arg, NullTest::arg, BooleanTest::arg, CoerceToDomain::arg, Aggref::args, GroupingFunc::args, WindowFunc::args, FuncExpr::args, OpExpr::args, ScalarArrayOpExpr::args, BoolExpr::args, SubPlan::args, CaseExpr::args, RowExpr::args, CoalesceExpr::args, MinMaxExpr::args, TableSampleClause::args, XmlExpr::args, check_stack_depth(), TableFunc::coldefexprs, TableFunc::colexprs, GroupingFunc::cols, copyObject, CommonTableExpr::ctequery, CommonTableExpr::cycle_clause, CTECycleClause::cycle_mark_default, CTECycleClause::cycle_mark_value, CaseExpr::defresult, TableFunc::docexpr, ArrayExpr::elements, ArrayCoerceExpr::elemexpr, elog, WindowClause::endOffset, ERROR, OnConflictExpr::exclRelTlist, CaseWhen::expr, InferenceElem::expr, TargetEntry::expr, PartitionPruneStepOp::exprs, FieldStore::fieldnums, FLATCOPY, FromExpr::fromlist, RangeTblFunction::funcexpr, IndexClause::indexquals, lappend(), JoinExpr::larg, SetOperationStmt::larg, RowCompareExpr::largs, lfirst, list_copy(), MUTATE, XmlExpr::named_args, FieldStore::newvals, NIL, nodeTag, TableFunc::ns_uris, OnConflictExpr::onConflictSet, OnConflictExpr::onConflictWhere, WindowClause::orderClause, WindowClause::partitionClause, PlaceHolderInfo::ph_var, PlaceHolderVar::phexpr, WithCheckOption::qual, JoinExpr::quals, FromExpr::quals, JoinExpr::rarg, SetOperationStmt::rarg, RowCompareExpr::rargs, SubscriptingRef::refassgnexpr, SubscriptingRef::refexpr, SubscriptingRef::reflowerindexpr, GroupingFunc::refs, SubscriptingRef::refupperindexpr, TableSampleClause::repeatable, CaseWhen::result, IndexClause::rinfo, TableFunc::rowexpr, CommonTableExpr::search_clause, WindowClause::startOffset, AlternativeSubPlan::subplans, SubLink::subselect, T_Aggref, T_AlternativeSubPlan, T_AppendRelInfo, T_ArrayCoerceExpr, T_ArrayExpr, T_BooleanTest, T_BoolExpr, T_CaseExpr, T_CaseTestExpr, T_CaseWhen, T_CoalesceExpr, T_CoerceToDomain, T_CoerceToDomainValue, T_CoerceViaIO, T_CollateExpr, T_CommonTableExpr, T_Const, T_ConvertRowtypeExpr, T_CTECycleClause, T_CTESearchClause, T_CurrentOfExpr, T_DistinctExpr, T_FieldSelect, T_FieldStore, T_FromExpr, T_FuncExpr, T_GroupingFunc, T_IndexClause, T_InferenceElem, T_JoinExpr, T_List, T_MinMaxExpr, T_NamedArgExpr, T_NextValueExpr, T_NullIfExpr, T_NullTest, T_OnConflictExpr, T_OpExpr, T_Param, T_PartitionPruneStepCombine, T_PartitionPruneStepOp, T_PlaceHolderInfo, T_PlaceHolderVar, T_Query, T_RangeTblFunction, T_RangeTblRef, T_RelabelType, T_RowCompareExpr, T_RowExpr, T_ScalarArrayOpExpr, T_SetOperationStmt, T_SetToDefault, T_SortGroupClause, T_SQLValueFunction, T_SubLink, T_SubPlan, T_SubscriptingRef, T_TableFunc, T_TableSampleClause, T_TargetEntry, T_Var, T_WindowClause, T_WindowFunc, T_WithCheckOption, T_XmlExpr, SubLink::testexpr, SubPlan::testexpr, and AppendRelInfo::translated_vars.

Referenced by adjust_appendrel_attrs_mutator(), convert_combining_aggrefs(), convert_testexpr_mutator(), eval_const_expressions_mutator(), fix_join_expr_mutator(), fix_scan_expr_mutator(), fix_upper_expr_mutator(), flatten_join_alias_vars_mutator(), get_notclausearg(), map_variable_attnos_mutator(), process_sublinks_mutator(), replace_correlation_vars_mutator(), replace_nestloop_params_mutator(), replace_rte_variables_mutator(), simplify_function(), substitute_actual_parameters_mutator(), and substitute_actual_srf_parameters_mutator().

2601 {
2602  /*
2603  * The mutator has already decided not to modify the current node, but we
2604  * must call the mutator for any sub-nodes.
2605  */
2606 
2607 #define FLATCOPY(newnode, node, nodetype) \
2608  ( (newnode) = (nodetype *) palloc(sizeof(nodetype)), \
2609  memcpy((newnode), (node), sizeof(nodetype)) )
2610 
2611 #define CHECKFLATCOPY(newnode, node, nodetype) \
2612  ( AssertMacro(IsA((node), nodetype)), \
2613  (newnode) = (nodetype *) palloc(sizeof(nodetype)), \
2614  memcpy((newnode), (node), sizeof(nodetype)) )
2615 
2616 #define MUTATE(newfield, oldfield, fieldtype) \
2617  ( (newfield) = (fieldtype) mutator((Node *) (oldfield), context) )
2618 
2619  if (node == NULL)
2620  return NULL;
2621 
2622  /* Guard against stack overflow due to overly complex expressions */
2623  check_stack_depth();
2624 
2625  switch (nodeTag(node))
2626  {
2627  /*
2628  * Primitive node types with no expression subnodes. Var and
2629  * Const are frequent enough to deserve special cases, the others
2630  * we just use copyObject for.
2631  */
2632  case T_Var:
2633  {
2634  Var *var = (Var *) node;
2635  Var *newnode;
2636 
2637  FLATCOPY(newnode, var, Var);
2638  return (Node *) newnode;
2639  }
2640  break;
2641  case T_Const:
2642  {
2643  Const *oldnode = (Const *) node;
2644  Const *newnode;
2645 
2646  FLATCOPY(newnode, oldnode, Const);
2647  /* XXX we don't bother with datumCopy; should we? */
2648  return (Node *) newnode;
2649  }
2650  break;
2651  case T_Param:
2652  case T_CaseTestExpr:
2653  case T_SQLValueFunction:
2654  case T_CoerceToDomainValue:
2655  case T_SetToDefault:
2656  case T_CurrentOfExpr:
2657  case T_NextValueExpr:
2658  case T_RangeTblRef:
2659  case T_SortGroupClause:
2660  case T_CTESearchClause:
2661  return (Node *) copyObject(node);
2662  case T_WithCheckOption:
2663  {
2664  WithCheckOption *wco = (WithCheckOption *) node;
2665  WithCheckOption *newnode;
2666 
2667  FLATCOPY(newnode, wco, WithCheckOption);
2668  MUTATE(newnode->qual, wco->qual, Node *);
2669  return (Node *) newnode;
2670  }
2671  case T_Aggref:
2672  {
2673  Aggref *aggref = (Aggref *) node;
2674  Aggref *newnode;
2675 
2676  FLATCOPY(newnode, aggref, Aggref);
2677  /* assume mutation doesn't change types of arguments */
2678  newnode->aggargtypes = list_copy(aggref->aggargtypes);
2679  MUTATE(newnode->aggdirectargs, aggref->aggdirectargs, List *);
2680  MUTATE(newnode->args, aggref->args, List *);
2681  MUTATE(newnode->aggorder, aggref->aggorder, List *);
2682  MUTATE(newnode->aggdistinct, aggref->aggdistinct, List *);
2683  MUTATE(newnode->aggfilter, aggref->aggfilter, Expr *);
2684  return (Node *) newnode;
2685  }
2686  break;
2687  case T_GroupingFunc:
2688  {
2689  GroupingFunc *grouping = (GroupingFunc *) node;
2690  GroupingFunc *newnode;
2691 
2692  FLATCOPY(newnode, grouping, GroupingFunc);
2693  MUTATE(newnode->args, grouping->args, List *);
2694 
2695  /*
2696  * We assume here that mutating the arguments does not change
2697  * the semantics, i.e. that the arguments are not mutated in a
2698  * way that makes them semantically different from their
2699  * previously matching expressions in the GROUP BY clause.
2700  *
2701  * If a mutator somehow wanted to do this, it would have to
2702  * handle the refs and cols lists itself as appropriate.
2703  */
2704  newnode->refs = list_copy(grouping->refs);
2705  newnode->cols = list_copy(grouping->cols);
2706 
2707  return (Node *) newnode;
2708  }
2709  break;
2710  case T_WindowFunc:
2711  {
2712  WindowFunc *wfunc = (WindowFunc *) node;
2713  WindowFunc *newnode;
2714 
2715  FLATCOPY(newnode, wfunc, WindowFunc);
2716  MUTATE(newnode->args, wfunc->args, List *);
2717  MUTATE(newnode->aggfilter, wfunc->aggfilter, Expr *);
2718  return (Node *) newnode;
2719  }
2720  break;
2721  case T_SubscriptingRef:
2722  {
2723  SubscriptingRef *sbsref = (SubscriptingRef *) node;
2724  SubscriptingRef *newnode;
2725 
2726  FLATCOPY(newnode, sbsref, SubscriptingRef);
2727  MUTATE(newnode->refupperindexpr, sbsref->refupperindexpr,
2728  List *);
2729  MUTATE(newnode->reflowerindexpr, sbsref->reflowerindexpr,
2730  List *);
2731  MUTATE(newnode->refexpr, sbsref->refexpr,
2732  Expr *);
2733  MUTATE(newnode->refassgnexpr, sbsref->refassgnexpr,
2734  Expr *);
2735 
2736  return (Node *) newnode;
2737  }
2738  break;
2739  case T_FuncExpr:
2740  {
2741  FuncExpr *expr = (FuncExpr *) node;
2742  FuncExpr *newnode;
2743 
2744  FLATCOPY(newnode, expr, FuncExpr);
2745  MUTATE(newnode->args, expr->args, List *);
2746  return (Node *) newnode;
2747  }
2748  break;
2749  case T_NamedArgExpr:
2750  {
2751  NamedArgExpr *nexpr = (NamedArgExpr *) node;
2752  NamedArgExpr *newnode;
2753 
2754  FLATCOPY(newnode, nexpr, NamedArgExpr);
2755  MUTATE(newnode->arg, nexpr->arg, Expr *);
2756  return (Node *) newnode;
2757  }
2758  break;
2759  case T_OpExpr:
2760  {
2761  OpExpr *expr = (OpExpr *) node;
2762  OpExpr *newnode;
2763 
2764  FLATCOPY(newnode, expr, OpExpr);
2765  MUTATE(newnode->args, expr->args, List *);
2766  return (Node *) newnode;
2767  }
2768  break;
2769  case T_DistinctExpr:
2770  {
2771  DistinctExpr *expr = (DistinctExpr *) node;
2772  DistinctExpr *newnode;
2773 
2774  FLATCOPY(newnode, expr, DistinctExpr);
2775  MUTATE(newnode->args, expr->args, List *);
2776  return (Node *) newnode;
2777  }
2778  break;
2779  case T_NullIfExpr:
2780  {
2781  NullIfExpr *expr = (NullIfExpr *) node;
2782  NullIfExpr *newnode;
2783 
2784  FLATCOPY(newnode, expr, NullIfExpr);
2785  MUTATE(newnode->args, expr->args, List *);
2786  return (Node *) newnode;
2787  }
2788  break;
2789  case T_ScalarArrayOpExpr:
2790  {
2791  ScalarArrayOpExpr *expr = (ScalarArrayOpExpr *) node;
2792  ScalarArrayOpExpr *newnode;
2793 
2794  FLATCOPY(newnode, expr, ScalarArrayOpExpr);
2795  MUTATE(newnode->args, expr->args, List *);
2796  return (Node *) newnode;
2797  }
2798  break;
2799  case T_BoolExpr:
2800  {
2801  BoolExpr *expr = (BoolExpr *) node;
2802  BoolExpr *newnode;
2803 
2804  FLATCOPY(newnode, expr, BoolExpr);
2805  MUTATE(newnode->args, expr->args, List *);
2806  return (Node *) newnode;
2807  }
2808  break;
2809  case T_SubLink:
2810  {
2811  SubLink *sublink = (SubLink *) node;
2812  SubLink *newnode;
2813 
2814  FLATCOPY(newnode, sublink, SubLink);
2815  MUTATE(newnode->testexpr, sublink->testexpr, Node *);
2816 
2817  /*
2818  * Also invoke the mutator on the sublink's Query node, so it
2819  * can recurse into the sub-query if it wants to.
2820  */
2821  MUTATE(newnode->subselect, sublink->subselect, Node *);
2822  return (Node *) newnode;
2823  }
2824  break;
2825  case T_SubPlan:
2826  {
2827  SubPlan *subplan = (SubPlan *) node;
2828  SubPlan *newnode;
2829 
2830  FLATCOPY(newnode, subplan, SubPlan);
2831  /* transform testexpr */
2832  MUTATE(newnode->testexpr, subplan->testexpr, Node *);
2833  /* transform args list (params to be passed to subplan) */
2834  MUTATE(newnode->args, subplan->args, List *);
2835  /* but not the sub-Plan itself, which is referenced as-is */
2836  return (Node *) newnode;
2837  }
2838  break;
2839  case T_AlternativeSubPlan:
2840  {
2841  AlternativeSubPlan *asplan = (AlternativeSubPlan *) node;
2842  AlternativeSubPlan *newnode;
2843 
2844  FLATCOPY(newnode, asplan, AlternativeSubPlan);
2845  MUTATE(newnode->subplans, asplan->subplans, List *);
2846  return (Node *) newnode;
2847  }
2848  break;
2849  case T_FieldSelect:
2850  {
2851  FieldSelect *fselect = (FieldSelect *) node;
2852  FieldSelect *newnode;
2853 
2854  FLATCOPY(newnode, fselect, FieldSelect);
2855  MUTATE(newnode->arg, fselect->arg, Expr *);
2856  return (Node *) newnode;
2857  }
2858  break;
2859  case T_FieldStore:
2860  {
2861  FieldStore *fstore = (FieldStore *) node;
2862  FieldStore *newnode;
2863 
2864  FLATCOPY(newnode, fstore, FieldStore);
2865  MUTATE(newnode->arg, fstore->arg, Expr *);
2866  MUTATE(newnode->newvals, fstore->newvals, List *);
2867  newnode->fieldnums = list_copy(fstore->fieldnums);
2868  return (Node *) newnode;
2869  }
2870  break;
2871  case T_RelabelType:
2872  {
2873  RelabelType *relabel = (RelabelType *) node;
2874  RelabelType *newnode;
2875 
2876  FLATCOPY(newnode, relabel, RelabelType);
2877  MUTATE(newnode->arg, relabel->arg, Expr *);
2878  return (Node *) newnode;
2879  }
2880  break;
2881  case T_CoerceViaIO:
2882  {
2883  CoerceViaIO *iocoerce = (CoerceViaIO *) node;
2884  CoerceViaIO *newnode;
2885 
2886  FLATCOPY(newnode, iocoerce, CoerceViaIO);
2887  MUTATE(newnode->arg, iocoerce->arg, Expr *);
2888  return (Node *) newnode;
2889  }
2890  break;
2891  case T_ArrayCoerceExpr:
2892  {
2893  ArrayCoerceExpr *acoerce = (ArrayCoerceExpr *) node;
2894  ArrayCoerceExpr *newnode;
2895 
2896  FLATCOPY(newnode, acoerce, ArrayCoerceExpr);
2897  MUTATE(newnode->arg, acoerce->arg, Expr *);
2898  MUTATE(newnode->elemexpr, acoerce->elemexpr, Expr *);
2899  return (Node *) newnode;
2900  }
2901  break;
2902  case T_ConvertRowtypeExpr:
2903  {
2904  ConvertRowtypeExpr *convexpr = (ConvertRowtypeExpr *) node;
2905  ConvertRowtypeExpr *newnode;
2906 
2907  FLATCOPY(newnode, convexpr, ConvertRowtypeExpr);
2908  MUTATE(newnode->arg, convexpr->arg, Expr *);
2909  return (Node *) newnode;
2910  }
2911  break;
2912  case T_CollateExpr:
2913  {
2914  CollateExpr *collate = (CollateExpr *) node;
2915  CollateExpr *newnode;
2916 
2917  FLATCOPY(newnode, collate, CollateExpr);
2918  MUTATE(newnode->arg, collate->arg, Expr *);
2919  return (Node *) newnode;
2920  }
2921  break;
2922  case T_CaseExpr:
2923  {
2924  CaseExpr *caseexpr = (CaseExpr *) node;
2925  CaseExpr *newnode;
2926 
2927  FLATCOPY(newnode, caseexpr, CaseExpr);
2928  MUTATE(newnode->arg, caseexpr->arg, Expr *);
2929  MUTATE(newnode->args, caseexpr->args, List *);
2930  MUTATE(newnode->defresult, caseexpr->defresult, Expr *);
2931  return (Node *) newnode;
2932  }
2933  break;
2934  case T_CaseWhen:
2935  {
2936  CaseWhen *casewhen = (CaseWhen *) node;
2937  CaseWhen *newnode;
2938 
2939  FLATCOPY(newnode, casewhen, CaseWhen);
2940  MUTATE(newnode->expr, casewhen->expr, Expr *);
2941  MUTATE(newnode->result, casewhen->result, Expr *);
2942  return (Node *) newnode;
2943  }
2944  break;
2945  case T_ArrayExpr:
2946  {
2947  ArrayExpr *arrayexpr = (ArrayExpr *) node;
2948  ArrayExpr *newnode;
2949 
2950  FLATCOPY(newnode, arrayexpr, ArrayExpr);
2951  MUTATE(newnode->elements, arrayexpr->elements, List *);
2952  return (Node *) newnode;
2953  }
2954  break;
2955  case T_RowExpr:
2956  {
2957  RowExpr *rowexpr = (RowExpr *) node;
2958  RowExpr *newnode;
2959 
2960  FLATCOPY(newnode, rowexpr, RowExpr);
2961  MUTATE(newnode->args, rowexpr->args, List *);
2962  /* Assume colnames needn't be duplicated */
2963  return (Node *) newnode;
2964  }
2965  break;
2966  case T_RowCompareExpr:
2967  {
2968  RowCompareExpr *rcexpr = (RowCompareExpr *) node;
2969  RowCompareExpr *newnode;
2970 
2971  FLATCOPY(newnode, rcexpr, RowCompareExpr);
2972  MUTATE(newnode->largs, rcexpr->largs, List *);
2973  MUTATE(newnode->rargs, rcexpr->rargs, List *);
2974  return (Node *) newnode;
2975  }
2976  break;
2977  case T_CoalesceExpr:
2978  {
2979  CoalesceExpr *coalesceexpr = (CoalesceExpr *) node;
2980  CoalesceExpr *newnode;
2981 
2982  FLATCOPY(newnode, coalesceexpr, CoalesceExpr);
2983  MUTATE(newnode->args, coalesceexpr->args, List *);
2984  return (Node *) newnode;
2985  }
2986  break;
2987  case T_MinMaxExpr:
2988  {
2989  MinMaxExpr *minmaxexpr = (MinMaxExpr *) node;
2990  MinMaxExpr *newnode;
2991 
2992  FLATCOPY(newnode, minmaxexpr, MinMaxExpr);
2993  MUTATE(newnode->args, minmaxexpr->args, List *);
2994  return (Node *) newnode;
2995  }
2996  break;
2997  case T_XmlExpr:
2998  {
2999  XmlExpr *xexpr = (XmlExpr *) node;
3000  XmlExpr *newnode;
3001 
3002  FLATCOPY(newnode, xexpr, XmlExpr);
3003  MUTATE(newnode->named_args, xexpr->named_args, List *);
3004  /* assume mutator does not care about arg_names */
3005  MUTATE(newnode->args, xexpr->args, List *);
3006  return (Node *) newnode;
3007  }
3008  break;
3009  case T_NullTest:
3010  {
3011  NullTest *ntest = (NullTest *) node;
3012  NullTest *newnode;
3013 
3014  FLATCOPY(newnode, ntest, NullTest);
3015  MUTATE(newnode->arg, ntest->arg, Expr *);
3016  return (Node *) newnode;
3017  }
3018  break;
3019  case T_BooleanTest:
3020  {
3021  BooleanTest *btest = (BooleanTest *) node;
3022  BooleanTest *newnode;
3023 
3024  FLATCOPY(newnode, btest, BooleanTest);
3025  MUTATE(newnode->arg, btest->arg, Expr *);
3026  return (Node *) newnode;
3027  }
3028  break;
3029  case T_CoerceToDomain:
3030  {
3031  CoerceToDomain *ctest = (CoerceToDomain *) node;
3032  CoerceToDomain *newnode;
3033 
3034  FLATCOPY(newnode, ctest, CoerceToDomain);
3035  MUTATE(newnode->arg, ctest->arg, Expr *);
3036  return (Node *) newnode;
3037  }
3038  break;
3039  case T_TargetEntry:
3040  {
3041  TargetEntry *targetentry = (TargetEntry *) node;
3042  TargetEntry *newnode;
3043 
3044  FLATCOPY(newnode, targetentry, TargetEntry);
3045  MUTATE(newnode->expr, targetentry->expr, Expr *);
3046  return (Node *) newnode;
3047  }
3048  break;
3049  case T_Query:
3050  /* Do nothing with a sub-Query, per discussion above */
3051  return node;
3052  case T_WindowClause:
3053  {
3054  WindowClause *wc = (WindowClause *) node;
3055  WindowClause *newnode;
3056 
3057  FLATCOPY(newnode, wc, WindowClause);
3058  MUTATE(newnode->partitionClause, wc->partitionClause, List *);
3059  MUTATE(newnode->orderClause, wc->orderClause, List *);
3060  MUTATE(newnode->startOffset, wc->startOffset, Node *);
3061  MUTATE(newnode->endOffset, wc->endOffset, Node *);
3062  return (Node *) newnode;
3063  }
3064  break;
3065  case T_CTECycleClause:
3066  {
3067  CTECycleClause *cc = (CTECycleClause *) node;
3068  CTECycleClause *newnode;
3069 
3070  FLATCOPY(newnode, cc, CTECycleClause);
3071  MUTATE(newnode->cycle_mark_value, cc->cycle_mark_value, Node *);
3072  MUTATE(newnode->cycle_mark_default, cc->cycle_mark_default, Node *);
3073  return (Node *) newnode;
3074  }
3075  break;
3076  case T_CommonTableExpr:
3077  {
3078  CommonTableExpr *cte = (CommonTableExpr *) node;
3079  CommonTableExpr *newnode;
3080 
3081  FLATCOPY(newnode, cte, CommonTableExpr);
3082 
3083  /*
3084  * Also invoke the mutator on the CTE's Query node, so it can
3085  * recurse into the sub-query if it wants to.
3086  */
3087  MUTATE(newnode->ctequery, cte->ctequery, Node *);
3088 
3089  MUTATE(newnode->search_clause, cte->search_clause, CTESearchClause *);
3090  MUTATE(newnode->cycle_clause, cte->cycle_clause, CTECycleClause *);
3091 
3092  return (Node *) newnode;
3093  }
3094  break;
3095  case T_List:
3096  {
3097  /*
3098  * We assume the mutator isn't interested in the list nodes
3099  * per se, so just invoke it on each list element. NOTE: this
3100  * would fail badly on a list with integer elements!
3101  */
3102  List *resultlist;
3103  ListCell *temp;
3104 
3105  resultlist = NIL;
3106  foreach(temp, (List *) node)
3107  {
3108  resultlist = lappend(resultlist,
3109  mutator((Node *) lfirst(temp),
3110  context));
3111  }
3112  return (Node *) resultlist;
3113  }
3114  break;
3115  case T_FromExpr:
3116  {
3117  FromExpr *from = (FromExpr *) node;
3118  FromExpr *newnode;
3119 
3120  FLATCOPY(newnode, from, FromExpr);
3121  MUTATE(newnode->fromlist, from->fromlist, List *);
3122  MUTATE(newnode->quals, from->quals, Node *);
3123  return (Node *) newnode;
3124  }
3125  break;
3126  case T_OnConflictExpr:
3127  {
3128  OnConflictExpr *oc = (OnConflictExpr *) node;
3129  OnConflictExpr *newnode;
3130 
3131  FLATCOPY(newnode, oc, OnConflictExpr);
3132  MUTATE(newnode->arbiterElems, oc->arbiterElems, List *);
3133  MUTATE(newnode->arbiterWhere, oc->arbiterWhere, Node *);
3134  MUTATE(newnode->onConflictSet, oc->onConflictSet, List *);
3135  MUTATE(newnode->onConflictWhere, oc->onConflictWhere, Node *);
3136  MUTATE(newnode->exclRelTlist, oc->exclRelTlist, List *);
3137 
3138  return (Node *) newnode;
3139  }
3140  break;
3141  case T_PartitionPruneStepOp:
3142  {
3143  PartitionPruneStepOp *opstep = (PartitionPruneStepOp *) node;
3144  PartitionPruneStepOp *newnode;
3145 
3146  FLATCOPY(newnode, opstep, PartitionPruneStepOp);
3147  MUTATE(newnode->exprs, opstep->exprs, List *);
3148 
3149  return (Node *) newnode;
3150  }
3151  break;
3152  case T_PartitionPruneStepCombine:
3153  /* no expression sub-nodes */
3154  return (Node *) copyObject(node);
3155  case T_JoinExpr:
3156  {
3157  JoinExpr *join = (JoinExpr *) node;
3158  JoinExpr *newnode;
3159 
3160  FLATCOPY(newnode, join, JoinExpr);
3161  MUTATE(newnode->larg, join->larg, Node *);
3162  MUTATE(newnode->rarg, join->rarg, Node *);
3163  MUTATE(newnode->quals, join->quals, Node *);
3164  /* We do not mutate alias or using by default */
3165  return (Node *) newnode;
3166  }
3167  break;
3168  case T_SetOperationStmt:
3169  {
3170  SetOperationStmt *setop = (SetOperationStmt *) node;
3171  SetOperationStmt *newnode;
3172 
3173  FLATCOPY(newnode, setop, SetOperationStmt);
3174  MUTATE(newnode->larg, setop->larg, Node *);
3175  MUTATE(newnode->rarg, setop->rarg, Node *);
3176  /* We do not mutate groupClauses by default */
3177  return (Node *) newnode;
3178  }
3179  break;
3180  case T_IndexClause:
3181  {
3182  IndexClause *iclause = (IndexClause *) node;
3183  IndexClause *newnode;
3184 
3185  FLATCOPY(newnode, iclause, IndexClause);
3186  MUTATE(newnode->rinfo, iclause->rinfo, RestrictInfo *);
3187  MUTATE(newnode->indexquals, iclause->indexquals, List *);
3188  return (Node *) newnode;
3189  }
3190  break;
3191  case T_PlaceHolderVar:
3192  {
3193  PlaceHolderVar *phv = (PlaceHolderVar *) node;
3194  PlaceHolderVar *newnode;
3195 
3196  FLATCOPY(newnode, phv, PlaceHolderVar);
3197  MUTATE(newnode->phexpr, phv->phexpr, Expr *);
3198  /* Assume we need not copy the relids bitmapset */
3199  return (Node *) newnode;
3200  }
3201  break;
3202  case T_InferenceElem:
3203  {
3204  InferenceElem *inferenceelemdexpr = (InferenceElem *) node;
3205  InferenceElem *newnode;
3206 
3207  FLATCOPY(newnode, inferenceelemdexpr, InferenceElem);
3208  MUTATE(newnode->expr, newnode->expr, Node *);
3209  return (Node *) newnode;
3210  }
3211  break;
3212  case T_AppendRelInfo:
3213  {
3214  AppendRelInfo *appinfo = (AppendRelInfo *) node;
3215  AppendRelInfo *newnode;
3216 
3217  FLATCOPY(newnode, appinfo, AppendRelInfo);
3218  MUTATE(newnode->translated_vars, appinfo->translated_vars, List *);
3219  /* Assume nothing need be done with parent_colnos[] */
3220  return (Node *) newnode;
3221  }
3222  break;
3223  case T_PlaceHolderInfo:
3224  {
3225  PlaceHolderInfo *phinfo = (PlaceHolderInfo *) node;
3226  PlaceHolderInfo *newnode;
3227 
3228  FLATCOPY(newnode, phinfo, PlaceHolderInfo);
3229  MUTATE(newnode->ph_var, phinfo->ph_var, PlaceHolderVar *);
3230  /* Assume we need not copy the relids bitmapsets */
3231  return (Node *) newnode;
3232  }
3233  break;
3234  case T_RangeTblFunction:
3235  {
3236  RangeTblFunction *rtfunc = (RangeTblFunction *) node;
3237  RangeTblFunction *newnode;
3238 
3239  FLATCOPY(newnode, rtfunc, RangeTblFunction);
3240  MUTATE(newnode->funcexpr, rtfunc->funcexpr, Node *);
3241  /* Assume we need not copy the coldef info lists */
3242  return (Node *) newnode;
3243  }
3244  break;
3245  case T_TableSampleClause:
3246  {
3247  TableSampleClause *tsc = (TableSampleClause *) node;
3248  TableSampleClause *newnode;
3249 
3250  FLATCOPY(newnode, tsc, TableSampleClause);
3251  MUTATE(newnode->args, tsc->args, List *);
3252  MUTATE(newnode->repeatable, tsc->repeatable, Expr *);
3253  return (Node *) newnode;
3254  }
3255  break;
3256  case T_TableFunc:
3257  {
3258  TableFunc *tf = (TableFunc *) node;
3259  TableFunc *newnode;
3260 
3261  FLATCOPY(newnode, tf, TableFunc);
3262  MUTATE(newnode->ns_uris, tf->ns_uris, List *);
3263  MUTATE(newnode->docexpr, tf->docexpr, Node *);
3264  MUTATE(newnode->rowexpr, tf->rowexpr, Node *);
3265  MUTATE(newnode->colexprs, tf->colexprs, List *);
3266  MUTATE(newnode->coldefexprs, tf->coldefexprs, List *);
3267  return (Node *) newnode;
3268  }
3269  break;
3270  default:
3271  elog(ERROR, "unrecognized node type: %d",
3272  (int) nodeTag(node));
3273  break;
3274  }
3275  /* can't get here, but keep compiler happy */
3276  return NULL;
3277 }
Aggref::aggdistinct
List * aggdistinct
Definition: primnodes.h:332
NIL
#define NIL
Definition: pg_list.h:65
MinMaxExpr::args
List * args
Definition: primnodes.h:1142
RowExpr::args
List * args
Definition: primnodes.h:1058
TableFunc::docexpr
Node * docexpr
Definition: primnodes.h:87
FieldStore::arg
Expr * arg
Definition: primnodes.h:827
PlaceHolderInfo::ph_var
PlaceHolderVar * ph_var
Definition: pathnodes.h:2401
GroupingFunc::args
List * args
Definition: primnodes.h:372
GroupingFunc::refs
List * refs
Definition: primnodes.h:374
WindowFunc::args
List * args
Definition: primnodes.h:390
FuncExpr::args
List * args
Definition: primnodes.h:503
RelabelType::arg
Expr * arg
Definition: primnodes.h:850
list_copy
List * list_copy(const List *oldlist)
Definition: list.c:1418
Node
Definition: nodes.h:539
Aggref::args
List * args
Definition: primnodes.h:330
FieldSelect::arg
Expr * arg
Definition: primnodes.h:798
FromExpr::fromlist
List * fromlist
Definition: primnodes.h:1553
Var
Definition: primnodes.h:186
SubscriptingRef::refupperindexpr
List * refupperindexpr
Definition: primnodes.h:444
AppendRelInfo::translated_vars
List * translated_vars
Definition: pathnodes.h:2323
FromExpr::quals
Node * quals
Definition: primnodes.h:1554
OnConflictExpr::arbiterElems
List * arbiterElems
Definition: primnodes.h:1572
JoinExpr::larg
Node * larg
Definition: primnodes.h:1532
Aggref::aggargtypes
List * aggargtypes
Definition: primnodes.h:328
ERROR
#define ERROR
Definition: elog.h:46
CommonTableExpr::search_clause
CTESearchClause * search_clause
Definition: parsenodes.h:1505
WindowClause::partitionClause
List * partitionClause
Definition: parsenodes.h:1379
CoalesceExpr::args
List * args
Definition: primnodes.h:1122
NullTest::arg
Expr * arg
Definition: primnodes.h:1255
TableFunc::coldefexprs
List * coldefexprs
Definition: primnodes.h:94
TableFunc::rowexpr
Node * rowexpr
Definition: primnodes.h:88
IndexClause::rinfo
struct RestrictInfo * rinfo
Definition: pathnodes.h:1283
OnConflictExpr::exclRelTlist
List * exclRelTlist
Definition: primnodes.h:1581
check_stack_depth
void check_stack_depth(void)
Definition: postgres.c:3459
Aggref::aggorder
List * aggorder
Definition: primnodes.h:331
BooleanTest::arg
Expr * arg
Definition: primnodes.h:1278
Aggref::aggdirectargs
List * aggdirectargs
Definition: primnodes.h:329
CoerceViaIO::arg
Expr * arg
Definition: primnodes.h:870
ArrayExpr::elements
List * elements
Definition: primnodes.h:1027
ArrayCoerceExpr::elemexpr
Expr * elemexpr
Definition: primnodes.h:895
IndexClause::indexquals
List * indexquals
Definition: pathnodes.h:1284
T_List
Definition: nodes.h:305
FieldStore::newvals
List * newvals
Definition: primnodes.h:828
GroupingFunc::cols
List * cols
Definition: primnodes.h:375
T_Const
Definition: nodes.h:158
lappend
List * lappend(List *list, void *datum)
Definition: list.c:336
T_Var
Definition: nodes.h:157
WindowClause::startOffset
Node * startOffset
Definition: parsenodes.h:1382
CaseExpr::args
List * args
Definition: primnodes.h:969
T_Query
Definition: nodes.h:318
JoinExpr::quals
Node * quals
Definition: primnodes.h:1536
FLATCOPY
#define FLATCOPY(newnode, node, nodetype)
SubPlan::testexpr
Node * testexpr
Definition: primnodes.h:739
TableFunc::colexprs
List * colexprs
Definition: primnodes.h:93
XmlExpr::named_args
List * named_args
Definition: primnodes.h:1219
XmlExpr::args
List * args
Definition: primnodes.h:1221
JoinExpr::rarg
Node * rarg
Definition: primnodes.h:1533
NamedArgExpr::arg
Expr * arg
Definition: primnodes.h:524
lfirst
#define lfirst(lc)
Definition: pg_list.h:169
TableFunc::ns_uris
List * ns_uris
Definition: primnodes.h:85
WindowFunc::aggfilter
Expr * aggfilter
Definition: primnodes.h:391
TargetEntry::expr
Expr * expr
Definition: primnodes.h:1444
WindowClause::endOffset
Node * endOffset
Definition: parsenodes.h:1383
CollateExpr::arg
Expr * arg
Definition: primnodes.h:936
CTECycleClause::cycle_mark_value
Node * cycle_mark_value
Definition: parsenodes.h:1486
Aggref::aggfilter
Expr * aggfilter
Definition: primnodes.h:333
BoolExpr::args
List * args
Definition: primnodes.h:616
CTECycleClause::cycle_mark_default
Node * cycle_mark_default
Definition: parsenodes.h:1487
nodeTag
#define nodeTag(nodeptr)
Definition: nodes.h:544
OnConflictExpr::arbiterWhere
Node * arbiterWhere
Definition: primnodes.h:1574
WindowClause::orderClause
List * orderClause
Definition: parsenodes.h:1380
SubscriptingRef::refassgnexpr
Expr * refassgnexpr
Definition: primnodes.h:451
CommonTableExpr::cycle_clause
CTECycleClause * cycle_clause
Definition: parsenodes.h:1506
FieldStore::fieldnums
List * fieldnums
Definition: primnodes.h:829
SubscriptingRef::reflowerindexpr
List * reflowerindexpr
Definition: primnodes.h:446
elog
#define elog(elevel,...)
Definition: elog.h:232
OnConflictExpr::onConflictSet
List * onConflictSet
Definition: primnodes.h:1578
SubscriptingRef::refexpr
Expr * refexpr
Definition: primnodes.h:449
CaseExpr::arg
Expr * arg
Definition: primnodes.h:968
CaseWhen::result
Expr * result
Definition: primnodes.h:981
copyObject
#define copyObject(obj)
Definition: nodes.h:655
OpExpr::args
List * args
Definition: primnodes.h:548
CaseExpr::defresult
Expr * defresult
Definition: primnodes.h:970
CaseWhen::expr
Expr * expr
Definition: primnodes.h:980
OnConflictExpr::onConflictWhere
Node * onConflictWhere
Definition: primnodes.h:1579
List
Definition: pg_list.h:50
MUTATE
#define MUTATE(newfield, oldfield, fieldtype)
T_Param
Definition: nodes.h:159
SubPlan::args
List * args
Definition: primnodes.h:763

◆ expression_tree_walker()

bool expression_tree_walker ( Node *  node,
bool(*)()  walker,
void *  context 
)

Definition at line 1904 of file nodeFuncs.c.

References Aggref::aggdirectargs, Aggref::aggdistinct, Aggref::aggfilter, WindowFunc::aggfilter, Aggref::aggorder, OnConflictExpr::arbiterElems, OnConflictExpr::arbiterWhere, arg, FieldStore::arg, ArrayCoerceExpr::arg, CaseExpr::arg, generate_unaccent_rules::args, Aggref::args, GroupingFunc::args, WindowFunc::args, FuncExpr::args, OpExpr::args, ScalarArrayOpExpr::args, BoolExpr::args, SubPlan::args, CaseExpr::args, TableSampleClause::args, XmlExpr::args, check_stack_depth(), TableFunc::coldefexprs, TableFunc::colexprs, CommonTableExpr::ctequery, CommonTableExpr::cycle_clause, CTECycleClause::cycle_mark_default, CTECycleClause::cycle_mark_value, CaseExpr::defresult, TableFunc::docexpr, ArrayCoerceExpr::elemexpr, elog, WindowClause::endOffset, ERROR, OnConflictExpr::exclRelTlist, CaseWhen::expr, expression_tree_walker(), PartitionPruneStepOp::exprs, FromExpr::fromlist, IndexClause::indexquals, JoinExpr::larg, SetOperationStmt::larg, RowCompareExpr::largs, lfirst, lfirst_node, XmlExpr::named_args, FieldStore::newvals, nodeTag, TableFunc::ns_uris, OnConflictExpr::onConflictSet, OnConflictExpr::onConflictWhere, WindowClause::orderClause, WindowClause::partitionClause, JoinExpr::quals, FromExpr::quals, JoinExpr::rarg, SetOperationStmt::rarg, RowCompareExpr::rargs, SubscriptingRef::refassgnexpr, SubscriptingRef::refexpr, SubscriptingRef::reflowerindexpr, SubscriptingRef::refupperindexpr, TableSampleClause::repeatable, CaseWhen::result, IndexClause::rinfo, TableFunc::rowexpr, CommonTableExpr::search_clause, WindowClause::startOffset, SubLink::subselect, T_Aggref, T_AlternativeSubPlan, T_AppendRelInfo, T_ArrayCoerceExpr, T_ArrayExpr, T_BooleanTest, T_BoolExpr, T_CaseExpr, T_CaseTestExpr, T_CoalesceExpr, T_CoerceToDomain, T_CoerceToDomainValue, T_CoerceViaIO, T_CollateExpr, T_CommonTableExpr, T_Const, T_ConvertRowtypeExpr, T_CTECycleClause, T_CTESearchClause, T_CurrentOfExpr, T_DistinctExpr, T_FieldSelect, T_FieldStore, T_FromExpr, T_FuncExpr, T_GroupingFunc, T_IndexClause, T_InferenceElem, T_JoinExpr, T_List, T_MinMaxExpr, T_NamedArgExpr, T_NextValueExpr, T_NullIfExpr, T_NullTest, T_OnConflictExpr, T_OpExpr, T_Param, T_PartitionPruneStepCombine, T_PartitionPruneStepOp, T_PlaceHolderInfo, T_PlaceHolderVar, T_Query, T_RangeTblFunction, T_RangeTblRef, T_RelabelType, T_RowCompareExpr, T_RowExpr, T_ScalarArrayOpExpr, T_SetOperationStmt, T_SetToDefault, T_SortGroupClause, T_SQLValueFunction, T_SubLink, T_SubPlan, T_SubscriptingRef, T_TableFunc, T_TableSampleClause, T_TargetEntry, T_Var, T_WindowClause, T_WindowFunc, T_WithCheckOption, T_XmlExpr, SubLink::testexpr, SubPlan::testexpr, and AppendRelInfo::translated_vars.

Referenced by acquireLocksOnSubLinks(), assign_collations_walker(), ChangeVarNodes_walker(), check_agg_arguments(), check_agg_arguments_walker(), check_nested_generated_walker(), check_parameter_resolution_walker(), check_ungrouped_columns_walker(), checkExprHasSubLink_walker(), contain_agg_clause_walker(), contain_aggs_of_level_walker(), contain_context_dependent_node_walker(), contain_dml_walker(), contain_exec_param_walker(), contain_leaked_vars_walker(), contain_mutable_functions_walker(), contain_non_const_walker(), contain_nonstrict_functions_walker(), contain_outer_selfref_walker(), contain_subplans_walker(), contain_var_clause_walker(), contain_vars_of_level_walker(), contain_volatile_functions_not_nextval_walker(), contain_volatile_functions_walker(), contain_windowfuncs_walker(), contains_multiexpr_param(), convert_saop_to_hashed_saop_walker(), cost_qual_eval_walker(), expression_returns_set_walker(), expression_tree_walker(), extract_query_dependencies_walker(), finalize_agg_primnode(), finalize_grouping_exprs_walker(), finalize_primnode(), find_cols_walker(), find_dependent_phvs_walker(), find_expr_references_walker(), find_window_functions_walker(), fireRIRonSubLink(), fireRIRrules(), fix_opfuncids_walker(), fix_scan_expr_walker(), flatten_rtes_walker(), get_last_attnums_walker(), get_notclausearg(), IncrementVarSublevelsUp_walker(), index_expression_changed_walker(), inline_cte_walker(), isQueryUsingTempRelation_walker(), locate_agg_of_level_walker(), locate_var_of_level_walker(), locate_windowfunc_walker(), LockViewRecurse_walker(), max_parallel_hazard_walker(), OffsetVarNodes_walker(), preprocess_aggrefs_walker(), pull_exec_paramids_walker(), pull_var_clause_walker(), pull_varattnos_walker(), pull_varnos_walker(), pull_vars_walker(), query_contains_extern_params_walker(), rangeTableEntry_used_walker(), ScanQueryWalker(), setRuleCheckAsUser_walker(), split_pathtarget_walker(), and substitute_phv_relids_walker().

1907 {
1908  ListCell *temp;
1909 
1910  /*
1911  * The walker has already visited the current node, and so we need only
1912  * recurse into any sub-nodes it has.
1913  *
1914  * We assume that the walker is not interested in List nodes per se, so
1915  * when we expect a List we just recurse directly to self without
1916  * bothering to call the walker.
1917  */
1918  if (node == NULL)
1919  return false;
1920 
1921  /* Guard against stack overflow due to overly complex expressions */
1922  check_stack_depth();
1923 
1924  switch (nodeTag(node))
1925  {
1926  case T_Var:
1927  case T_Const:
1928  case T_Param:
1929  case T_CaseTestExpr:
1930  case T_SQLValueFunction:
1931  case T_CoerceToDomainValue:
1932  case T_SetToDefault:
1933  case T_CurrentOfExpr:
1934  case T_NextValueExpr:
1935  case T_RangeTblRef:
1936  case T_SortGroupClause:
1937  case T_CTESearchClause:
1938  /* primitive node types with no expression subnodes */
1939  break;
1940  case T_WithCheckOption:
1941  return walker(((WithCheckOption *) node)->qual, context);
1942  case T_Aggref:
1943  {
1944  Aggref *expr = (Aggref *) node;
1945 
1946  /* recurse directly on List */
1947  if (expression_tree_walker((Node *) expr->aggdirectargs,
1948  walker, context))
1949  return true;
1950  if (expression_tree_walker((Node *) expr->args,
1951  walker, context))
1952  return true;
1953  if (expression_tree_walker((Node *) expr->aggorder,
1954  walker, context))
1955  return true;
1956  if (expression_tree_walker((Node *) expr->aggdistinct,
1957  walker, context))
1958  return true;
1959  if (walker((Node *) expr->aggfilter, context))
1960  return true;
1961  }
1962  break;
1963  case T_GroupingFunc:
1964  {
1965  GroupingFunc *grouping = (GroupingFunc *) node;
1966 
1967  if (expression_tree_walker((Node *) grouping->args,
1968  walker, context))
1969  return true;
1970  }
1971  break;
1972  case T_WindowFunc:
1973  {
1974  WindowFunc *expr = (WindowFunc *) node;
1975 
1976  /* recurse directly on List */
1977  if (expression_tree_walker((Node *) expr->args,
1978  walker, context))
1979  return true;
1980  if (walker((Node *) expr->aggfilter, context))
1981  return true;
1982  }
1983  break;
1984  case T_SubscriptingRef:
1985  {
1986  SubscriptingRef *sbsref = (SubscriptingRef *) node;
1987 
1988  /* recurse directly for upper/lower container index lists */
1989  if (expression_tree_walker((Node *) sbsref->refupperindexpr,
1990  walker, context))
1991  return true;
1992  if (expression_tree_walker((Node *) sbsref->reflowerindexpr,
1993  walker, context))
1994  return true;
1995  /* walker must see the refexpr and refassgnexpr, however */
1996  if (walker(sbsref->refexpr, context))
1997  return true;
1998 
1999  if (walker(sbsref->refassgnexpr, context))
2000  return true;
2001  }
2002  break;
2003  case T_FuncExpr:
2004  {
2005  FuncExpr *expr = (FuncExpr *) node;
2006 
2007  if (expression_tree_walker((Node *) expr->args,
2008  walker, context))
2009  return true;
2010  }
2011  break;
2012  case T_NamedArgExpr:
2013  return walker(((NamedArgExpr *) node)->arg, context);
2014  case T_OpExpr:
2015  case T_DistinctExpr: /* struct-equivalent to OpExpr */
2016  case T_NullIfExpr: /* struct-equivalent to OpExpr */
2017  {
2018  OpExpr *expr = (OpExpr *) node;
2019 
2020  if (expression_tree_walker((Node *) expr->args,
2021  walker, context))
2022  return true;
2023  }
2024  break;
2025  case T_ScalarArrayOpExpr:
2026  {
2027  ScalarArrayOpExpr *expr = (ScalarArrayOpExpr *) node;
2028 
2029  if (expression_tree_walker((Node *) expr->args,
2030  walker, context))
2031  return true;
2032  }
2033  break;
2034  case T_BoolExpr:
2035  {
2036  BoolExpr *expr = (BoolExpr *) node;
2037 
2038  if (expression_tree_walker((Node *) expr->args,
2039  walker, context))
2040  return true;
2041  }
2042  break;
2043  case T_SubLink:
2044  {
2045  SubLink *sublink = (SubLink *) node;
2046 
2047  if (walker(sublink->testexpr, context))
2048  return true;
2049 
2050  /*
2051  * Also invoke the walker on the sublink's Query node, so it
2052  * can recurse into the sub-query if it wants to.
2053  */
2054  return walker(sublink->subselect, context);
2055  }
2056  break;
2057  case T_SubPlan:
2058  {
2059  SubPlan *subplan = (SubPlan *) node;
2060 
2061  /* recurse into the testexpr, but not into the Plan */
2062  if (walker(subplan->testexpr, context))
2063  return true;
2064  /* also examine args list */
2065  if (expression_tree_walker((Node *) subplan->args,
2066  walker, context))
2067  return true;
2068  }
2069  break;
2070  case T_AlternativeSubPlan:
2071  return walker(((AlternativeSubPlan *) node)->subplans, context);
2072  case T_FieldSelect:
2073  return walker(((FieldSelect *) node)->arg, context);
2074  case T_FieldStore:
2075  {
2076  FieldStore *fstore = (FieldStore *) node;
2077 
2078  if (walker(fstore->arg, context))
2079  return true;
2080  if (walker(fstore->newvals, context))
2081  return true;
2082  }
2083  break;
2084  case T_RelabelType:
2085  return walker(((RelabelType *) node)->arg, context);
2086  case T_CoerceViaIO:
2087  return walker(((CoerceViaIO *) node)->arg, context);
2088  case T_ArrayCoerceExpr:
2089  {
2090  ArrayCoerceExpr *acoerce = (ArrayCoerceExpr *) node;
2091 
2092  if (walker(acoerce->arg, context))
2093  return true;
2094  if (walker(acoerce->elemexpr, context))
2095  return true;
2096  }
2097  break;
2098  case T_ConvertRowtypeExpr:
2099  return walker(((ConvertRowtypeExpr *) node)->arg, context);
2100  case T_CollateExpr:
2101  return walker(((CollateExpr *) node)->arg, context);
2102  case T_CaseExpr:
2103  {
2104  CaseExpr *caseexpr = (CaseExpr *) node;
2105 
2106  if (walker(caseexpr->arg, context))
2107  return true;
2108  /* we assume walker doesn't care about CaseWhens, either */
2109  foreach(temp, caseexpr->args)
2110  {
2111  CaseWhen *when = lfirst_node(CaseWhen, temp);
2112 
2113  if (walker(when->expr, context))
2114  return true;
2115  if (walker(when->result, context))
2116  return true;
2117  }
2118  if (walker(caseexpr->defresult, context))
2119  return true;
2120  }
2121  break;
2122  case T_ArrayExpr:
2123  return walker(((ArrayExpr *) node)->elements, context);
2124  case T_RowExpr:
2125  /* Assume colnames isn't interesting */
2126  return walker(((RowExpr *) node)->args, context);
2127  case T_RowCompareExpr:
2128  {
2129  RowCompareExpr *rcexpr = (RowCompareExpr *) node;
2130 
2131  if (walker(rcexpr->largs, context))
2132  return true;
2133  if (walker(rcexpr->rargs, context))
2134  return true;
2135  }
2136  break;
2137  case T_CoalesceExpr:
2138  return walker(((CoalesceExpr *) node)->args, context);
2139  case T_MinMaxExpr:
2140  return walker(((MinMaxExpr *) node)->args, context);
2141  case T_XmlExpr:
2142  {
2143  XmlExpr *xexpr = (XmlExpr *) node;
2144 
2145  if (walker(xexpr->named_args, context))
2146  return true;
2147  /* we assume walker doesn't care about arg_names */
2148  if (walker(xexpr->args, context))
2149  return true;
2150  }
2151  break;
2152  case T_NullTest:
2153  return walker(((NullTest *) node)->arg, context);
2154  case T_BooleanTest:
2155  return walker(((BooleanTest *) node)->arg, context);
2156  case T_CoerceToDomain:
2157  return walker(((CoerceToDomain *) node)->arg, context);
2158  case T_TargetEntry:
2159  return walker(((TargetEntry *) node)->expr, context);
2160  case T_Query:
2161  /* Do nothing with a sub-Query, per discussion above */
2162  break;
2163  case T_WindowClause:
2164  {
2165  WindowClause *wc = (WindowClause *) node;
2166 
2167  if (walker(wc->partitionClause, context))
2168  return true;
2169  if (walker(wc->orderClause, context))
2170  return true;
2171  if (walker(wc->startOffset, context))
2172  return true;
2173  if (walker(wc->endOffset, context))
2174  return true;
2175  }
2176  break;
2177  case T_CTECycleClause:
2178  {
2179  CTECycleClause *cc = (CTECycleClause *) node;
2180 
2181  if (walker(cc->cycle_mark_value, context))
2182  return true;
2183  if (walker(cc->cycle_mark_default, context))
2184  return true;
2185  }
2186  break;
2187  case T_CommonTableExpr:
2188  {
2189  CommonTableExpr *cte = (CommonTableExpr *) node;
2190 
2191  /*
2192  * Invoke the walker on the CTE's Query node, so it can
2193  * recurse into the sub-query if it wants to.
2194  */
2195  if (walker(cte->ctequery, context))
2196  return true;
2197 
2198  if (walker(cte->search_clause, context))
2199  return true;
2200  if (walker(cte->cycle_clause, context))
2201  return true;
2202  }
2203  break;
2204  case T_List:
2205  foreach(temp, (List *) node)
2206  {
2207  if (walker((Node *) lfirst(temp), context))
2208  return true;
2209  }
2210  break;
2211  case T_FromExpr:
2212  {
2213  FromExpr *from = (FromExpr *) node;
2214 
2215  if (walker(from->fromlist, context))
2216  return true;
2217  if (walker(from->quals, context))
2218  return true;
2219  }
2220  break;
2221  case T_OnConflictExpr:
2222  {
2223  OnConflictExpr *onconflict = (OnConflictExpr *) node;
2224 
2225  if (walker((Node *) onconflict->arbiterElems, context))
2226  return true;
2227  if (walker(onconflict->arbiterWhere, context))
2228  return true;
2229  if (walker(onconflict->onConflictSet, context))
2230  return true;
2231  if (walker(onconflict->onConflictWhere, context))
2232  return true;
2233  if (walker(onconflict->exclRelTlist, context))
2234  return true;
2235  }
2236  break;
2237  case T_PartitionPruneStepOp:
2238  {
2239  PartitionPruneStepOp *opstep = (PartitionPruneStepOp *) node;
2240 
2241  if (walker((Node *) opstep->exprs, context))
2242  return true;
2243  }
2244  break;
2245  case T_PartitionPruneStepCombine:
2246  /* no expression subnodes */
2247  break;
2248  case T_JoinExpr:
2249  {
2250  JoinExpr *join = (JoinExpr *) node;
2251 
2252  if (walker(join->larg, context))
2253  return true;
2254  if (walker(join->rarg, context))
2255  return true;
2256  if (walker(join->quals, context))
2257  return true;
2258 
2259  /*
2260  * alias clause, using list are deemed uninteresting.
2261  */
2262  }
2263  break;
2264  case T_SetOperationStmt:
2265  {
2266  SetOperationStmt *setop = (SetOperationStmt *) node;
2267 
2268  if (walker(setop->larg, context))
2269  return true;
2270  if (walker(setop->rarg, context))
2271  return true;
2272 
2273  /* groupClauses are deemed uninteresting */
2274  }
2275  break;
2276  case T_IndexClause:
2277  {
2278  IndexClause *iclause = (IndexClause *) node;
2279 
2280  if (walker(iclause->rinfo, context))
2281  return true;
2282  if (expression_tree_walker((Node *) iclause->indexquals,
2283  walker, context))
2284  return true;
2285  }
2286  break;
2287  case T_PlaceHolderVar:
2288  return walker(((PlaceHolderVar *) node)->phexpr, context);
2289  case T_InferenceElem:
2290  return walker(((InferenceElem *) node)->expr, context);
2291  case T_AppendRelInfo:
2292  {
2293  AppendRelInfo *appinfo = (AppendRelInfo *) node;
2294 
2295  if (expression_tree_walker((Node *) appinfo->translated_vars,
2296  walker, context))
2297  return true;
2298  }
2299  break;
2300  case T_PlaceHolderInfo:
2301  return walker(((PlaceHolderInfo *) node)->ph_var, context);
2302  case T_RangeTblFunction:
2303  return walker(((RangeTblFunction *) node)->funcexpr, context);
2304  case T_TableSampleClause:
2305  {
2306  TableSampleClause *tsc = (TableSampleClause *) node;
2307 
2308  if (expression_tree_walker((Node *) tsc->args,
2309  walker, context))
2310  return true;
2311  if (walker((Node *) tsc->repeatable, context))
2312  return true;
2313  }
2314  break;
2315  case T_TableFunc:
2316  {
2317  TableFunc *tf = (TableFunc *) node;
2318 
2319  if (walker(tf->ns_uris, context))
2320  return true;
2321  if (walker(tf->docexpr, context))
2322  return true;
2323  if (walker(tf->rowexpr, context))
2324  return true;
2325  if (walker(tf->colexprs, context))
2326  return true;
2327  if (walker(tf->coldefexprs, context))
2328  return true;
2329  }
2330  break;
2331  default:
2332  elog(ERROR, "unrecognized node type: %d",
2333  (int) nodeTag(node));
2334  break;
2335  }
2336  return false;
2337 }
Aggref::aggdistinct
List * aggdistinct
Definition: primnodes.h:332
TableFunc::docexpr
Node * docexpr
Definition: primnodes.h:87
FieldStore::arg
Expr * arg
Definition: primnodes.h:827
GroupingFunc::args
List * args
Definition: primnodes.h:372
WindowFunc::args
List * args
Definition: primnodes.h:390
FuncExpr::args
List * args
Definition: primnodes.h:503
Node
Definition: nodes.h:539
Aggref::args
List * args
Definition: primnodes.h:330
FromExpr::fromlist
List * fromlist
Definition: primnodes.h:1553
SubscriptingRef::refupperindexpr
List * refupperindexpr
Definition: primnodes.h:444
AppendRelInfo::translated_vars
List * translated_vars
Definition: pathnodes.h:2323
FromExpr::quals
Node * quals
Definition: primnodes.h:1554
OnConflictExpr::arbiterElems
List * arbiterElems
Definition: primnodes.h:1572
JoinExpr::larg
Node * larg
Definition: primnodes.h:1532
ERROR
#define ERROR
Definition: elog.h:46
CommonTableExpr::search_clause
CTESearchClause * search_clause
Definition: parsenodes.h:1505
WindowClause::partitionClause
List * partitionClause
Definition: parsenodes.h:1379
TableFunc::coldefexprs
List * coldefexprs
Definition: primnodes.h:94
lfirst_node
#define lfirst_node(type, lc)
Definition: pg_list.h:172
TableFunc::rowexpr
Node * rowexpr
Definition: primnodes.h:88
IndexClause::rinfo
struct RestrictInfo * rinfo
Definition: pathnodes.h:1283
OnConflictExpr::exclRelTlist
List * exclRelTlist
Definition: primnodes.h:1581
check_stack_depth
void check_stack_depth(void)
Definition: postgres.c:3459
Aggref::aggorder
List * aggorder
Definition: primnodes.h:331
generate_unaccent_rules.args
args
Definition: generate_unaccent_rules.py:285
Aggref::aggdirectargs
List * aggdirectargs
Definition: primnodes.h:329
ArrayCoerceExpr::elemexpr
Expr * elemexpr
Definition: primnodes.h:895
when
Definition: type.h:82
IndexClause::indexquals
List * indexquals
Definition: pathnodes.h:1284
T_List
Definition: nodes.h:305
FieldStore::newvals
List * newvals
Definition: primnodes.h:828
T_Const
Definition: nodes.h:158
T_Var
Definition: nodes.h:157
WindowClause::startOffset
Node * startOffset
Definition: parsenodes.h:1382
CaseExpr::args
List * args
Definition: primnodes.h:969
T_Query
Definition: nodes.h:318
JoinExpr::quals
Node * quals
Definition: primnodes.h:1536
SubPlan::testexpr
Node * testexpr
Definition: primnodes.h:739
TableFunc::colexprs
List * colexprs
Definition: primnodes.h:93
XmlExpr::named_args
List * named_args
Definition: primnodes.h:1219
XmlExpr::args
List * args
Definition: primnodes.h:1221
JoinExpr::rarg
Node * rarg
Definition: primnodes.h:1533
lfirst
#define lfirst(lc)
Definition: pg_list.h:169
TableFunc::ns_uris
List * ns_uris
Definition: primnodes.h:85
WindowFunc::aggfilter
Expr * aggfilter
Definition: primnodes.h:391
WindowClause::endOffset
Node * endOffset
Definition: parsenodes.h:1383
expression_tree_walker
bool expression_tree_walker(Node *node, bool(*walker)(), void *context)
Definition: nodeFuncs.c:1904
CTECycleClause::cycle_mark_value
Node * cycle_mark_value
Definition: parsenodes.h:1486
Aggref::aggfilter
Expr * aggfilter
Definition: primnodes.h:333
BoolExpr::args
List * args
Definition: primnodes.h:616
CTECycleClause::cycle_mark_default
Node * cycle_mark_default
Definition: parsenodes.h:1487
nodeTag
#define nodeTag(nodeptr)
Definition: nodes.h:544
OnConflictExpr::arbiterWhere
Node * arbiterWhere
Definition: primnodes.h:1574
WindowClause::orderClause
List * orderClause
Definition: parsenodes.h:1380
SubscriptingRef::refassgnexpr
Expr * refassgnexpr
Definition: primnodes.h:451
CommonTableExpr::cycle_clause
CTECycleClause * cycle_clause
Definition: parsenodes.h:1506
SubscriptingRef::reflowerindexpr
List * reflowerindexpr
Definition: primnodes.h:446
elog
#define elog(elevel,...)
Definition: elog.h:232
OnConflictExpr::onConflictSet
List * onConflictSet
Definition: primnodes.h:1578
arg
void * arg
Definition: pg_backup_utils.c:27
SubscriptingRef::refexpr
Expr * refexpr
Definition: primnodes.h:449
CaseExpr::arg
Expr * arg
Definition: primnodes.h:968
CaseWhen::result
Expr * result
Definition: primnodes.h:981
OpExpr::args
List * args
Definition: primnodes.h:548
CaseExpr::defresult
Expr * defresult
Definition: primnodes.h:970
CaseWhen::expr
Expr * expr
Definition: primnodes.h:980
OnConflictExpr::onConflictWhere
Node * onConflictWhere
Definition: primnodes.h:1579
List
Definition: pg_list.h:50
T_Param
Definition: nodes.h:159
SubPlan::args
List * args
Definition: primnodes.h:763

◆ exprInputCollation()

Oid exprInputCollation ( const Node *  expr)

Definition at line 974 of file nodeFuncs.c.

References InvalidOid, nodeTag, T_Aggref, T_DistinctExpr, T_FuncExpr, T_MinMaxExpr, T_NullIfExpr, T_OpExpr, T_ScalarArrayOpExpr, and T_WindowFunc.

Referenced by resolve_polymorphic_tupdesc().

975 {
976  Oid coll;
977 
978  if (!expr)
979  return InvalidOid;
980 
981  switch (nodeTag(expr))
982  {
983  case T_Aggref:
984  coll = ((const Aggref *) expr)->inputcollid;
985  break;
986  case T_WindowFunc:
987  coll = ((const WindowFunc *) expr)->inputcollid;
988  break;
989  case T_FuncExpr:
990  coll = ((const FuncExpr *) expr)->inputcollid;
991  break;
992  case T_OpExpr:
993  coll = ((const OpExpr *) expr)->inputcollid;
994  break;
995  case T_DistinctExpr:
996  coll = ((const DistinctExpr *) expr)->inputcollid;
997  break;
998  case T_NullIfExpr:
999  coll = ((const NullIfExpr *) expr)->inputcollid;
1000  break;
1001  case T_ScalarArrayOpExpr:
1002  coll = ((const ScalarArrayOpExpr *) expr)->inputcollid;
1003  break;
1004  case T_MinMaxExpr:
1005  coll = ((const MinMaxExpr *) expr)->inputcollid;
1006  break;
1007  default:
1008  coll = InvalidOid;
1009  break;
1010  }
1011  return coll;
1012 }
Oid
unsigned int Oid
Definition: postgres_ext.h:31
InvalidOid
#define InvalidOid
Definition: postgres_ext.h:36
nodeTag
#define nodeTag(nodeptr)
Definition: nodes.h:544

◆ exprIsLengthCoercion()

bool exprIsLengthCoercion ( const Node *  expr,
int32 *  coercedTypmod 
)

Definition at line 503 of file nodeFuncs.c.

References FuncExpr::args, COERCE_EXPLICIT_CAST, COERCE_IMPLICIT_CAST, Const::constisnull, Const::consttype, Const::constvalue, DatumGetInt32, FuncExpr::funcformat, IsA, list_length(), lsecond, and ArrayCoerceExpr::resulttypmod.

Referenced by deparseFuncExpr(), exprTypmod(), and get_func_expr().

504 {
505  if (coercedTypmod != NULL)
506  *coercedTypmod = -1; /* default result on failure */
507 
508  /*
509  * Scalar-type length coercions are FuncExprs, array-type length coercions
510  * are ArrayCoerceExprs
511  */
512  if (expr && IsA(expr, FuncExpr))
513  {
514  const FuncExpr *func = (const FuncExpr *) expr;
515  int nargs;
516  Const *second_arg;
517 
518  /*
519  * If it didn't come from a coercion context, reject.
520  */
521  if (func->funcformat != COERCE_EXPLICIT_CAST &&
522  func->funcformat != COERCE_IMPLICIT_CAST)
523  return false;
524 
525  /*
526  * If it's not a two-argument or three-argument function with the
527  * second argument being an int4 constant, it can't have been created
528  * from a length coercion (it must be a type coercion, instead).
529  */
530  nargs = list_length(func->args);
531  if (nargs < 2 || nargs > 3)
532  return false;
533 
534  second_arg = (Const *) lsecond(func->args);
535  if (!IsA(second_arg, Const) ||
536  second_arg->consttype != INT4OID ||
537  second_arg->constisnull)
538  return false;
539 
540  /*
541  * OK, it is indeed a length-coercion function.
542  */
543  if (coercedTypmod != NULL)
544  *coercedTypmod = DatumGetInt32(second_arg->constvalue);
545 
546  return true;
547  }
548 
549  if (expr && IsA(expr, ArrayCoerceExpr))
550  {
551  const ArrayCoerceExpr *acoerce = (const ArrayCoerceExpr *) expr;
552 
553  /* It's not a length coercion unless there's a nondefault typmod */
554  if (acoerce->resulttypmod < 0)
555  return false;
556 
557  /*
558  * OK, it is indeed a length-coercion expression.
559  */
560  if (coercedTypmod != NULL)
561  *coercedTypmod = acoerce->resulttypmod;
562 
563  return true;
564  }
565 
566  return false;
567 }
Const::constvalue
Datum constvalue
Definition: primnodes.h:219
IsA
#define IsA(nodeptr, _type_)
Definition: nodes.h:590
FuncExpr::args
List * args
Definition: primnodes.h:503
DatumGetInt32
#define DatumGetInt32(X)
Definition: postgres.h:516
lsecond
#define lsecond(l)
Definition: pg_list.h:179
Const::consttype
Oid consttype
Definition: primnodes.h:215
FuncExpr::funcformat
CoercionForm funcformat
Definition: primnodes.h:500
list_length
static int list_length(const List *l)
Definition: pg_list.h:149
ArrayCoerceExpr::resulttypmod
int32 resulttypmod
Definition: primnodes.h:897
Const::constisnull
bool constisnull
Definition: primnodes.h:220

◆ exprLocation()

int exprLocation ( const Node *  expr)

Definition at line 1250 of file nodeFuncs.c.

References arg, TypeCast::arg, NamedArgExpr::arg, RelabelType::arg, CoerceViaIO::arg, ArrayCoerceExpr::arg, ConvertRowtypeExpr::arg, NullTest::arg, BooleanTest::arg, CoerceToDomain::arg, FuncCall::args, FuncExpr::args, OpExpr::args, ScalarArrayOpExpr::args, BoolExpr::args, XmlExpr::args, exprLocation(), fc(), leftmostLoc(), A_Expr::lexpr, lfirst, TypeName::location, A_Expr::location, TypeCast::location, FuncCall::location, FuncExpr::location, NamedArgExpr::location, OpExpr::location, ScalarArrayOpExpr::location, BoolExpr::location, SubLink::location, RelabelType::location, CoerceViaIO::location, ArrayCoerceExpr::location, ConvertRowtypeExpr::location, XmlExpr::location, NullTest::location, BooleanTest::location, CoerceToDomain::location, nodeTag, source, T_A_ArrayExpr, T_A_Const, T_A_Expr, T_Aggref, T_ArrayCoerceExpr, T_ArrayExpr, T_BooleanTest, T_BoolExpr, T_CaseExpr, T_CaseWhen, T_CoalesceExpr, T_CoerceToDomain, T_CoerceToDomainValue, T_CoerceViaIO, T_CollateClause, T_CollateExpr, T_ColumnDef, T_ColumnRef, T_CommonTableExpr, T_Const, T_Constraint, T_ConvertRowtypeExpr, T_CTECycleClause, T_CTESearchClause, T_DistinctExpr, T_FieldSelect, T_FieldStore, T_FuncCall, T_FuncExpr, T_FunctionParameter, T_GroupingFunc, T_GroupingSet, T_InferClause, T_InferenceElem, T_IntoClause, T_List, T_MinMaxExpr, T_MultiAssignRef, T_NamedArgExpr, T_NullIfExpr, T_NullTest, T_OnConflictClause, T_OpExpr, T_Param, T_ParamRef, T_PartitionBoundSpec, T_PartitionElem, T_PartitionRangeDatum, T_PartitionSpec, T_PlaceHolderVar, T_RangeTableSample, T_RangeVar, T_RelabelType, T_ResTarget, T_RowCompareExpr, T_RowExpr, T_ScalarArrayOpExpr, T_SetToDefault, T_SortBy, T_SQLValueFunction, T_SubLink, T_SubscriptingRef, T_TableFunc, T_TargetEntry, T_TypeCast, T_TypeName, T_Var, T_WindowDef, T_WindowFunc, T_WithClause, T_XmlExpr, T_XmlSerialize, SubLink::testexpr, and TypeCast::typeName.

Referenced by addRangeTableEntryForFunction(), addTargetToSortList(), analyzeCTE(), array_subscript_transform(), assign_collations_walker(), check_agg_arguments_walker(), check_srf_call_placement(), checkWellFormedRecursion(), coerce_to_boolean(), coerce_to_common_type(), coerce_to_specific_type_typmod(), EvaluateParams(), ExecInitFunc(), ExecInitSubscriptingRef(), exprLocation(), finalize_grouping_exprs_walker(), get_matching_location(), hstore_subscript_transform(), init_sexpr(), jsonb_subscript_transform(), parseCheckAggregates(), ParseFuncOrColumn(), parser_coercion_errposition(), resolve_unique_index_expr(), select_common_type(), transformAggregateCall(), transformArrayExpr(), transformAssignedExpr(), transformCaseExpr(), transformCoalesceExpr(), transformContainerSubscripts(), transformDistinctClause(), transformDistinctOnClause(), transformFrameOffset(), transformFromClauseItem(), transformGroupClause(), transformGroupClauseExpr(), transformGroupingSet(), transformIndirection(), transformInsertRow(), transformInsertStmt(), transformMultiAssignRef(), transformOnConflictArbiter(), transformPartitionBound(), transformPartitionBoundValue(), transformPartitionRangeBounds(), transformPLAssignStmt(), transformRangeFunction(), transformReturningList(), transformSelectStmt(), transformSetOperationStmt(), transformSetOperationTree(), transformValuesClause(), and validateInfiniteBounds().

1251 {
1252  int loc;
1253 
1254  if (expr == NULL)
1255  return -1;
1256  switch (nodeTag(expr))
1257  {
1258  case T_RangeVar:
1259  loc = ((const RangeVar *) expr)->location;
1260  break;
1261  case T_TableFunc:
1262  loc = ((const TableFunc *) expr)->location;
1263  break;
1264  case T_Var:
1265  loc = ((const Var *) expr)->location;
1266  break;
1267  case T_Const:
1268  loc = ((const Const *) expr)->location;
1269  break;
1270  case T_Param:
1271  loc = ((const Param *) expr)->location;
1272  break;
1273  case T_Aggref:
1274  /* function name should always be the first thing */
1275  loc = ((const Aggref *) expr)->location;
1276  break;
1277  case T_GroupingFunc:
1278  loc = ((const GroupingFunc *) expr)->location;
1279  break;
1280  case T_WindowFunc:
1281  /* function name should always be the first thing */
1282  loc = ((const WindowFunc *) expr)->location;
1283  break;
1284  case T_SubscriptingRef:
1285  /* just use container argument's location */
1286  loc = exprLocation((Node *) ((const SubscriptingRef *) expr)->refexpr);
1287  break;
1288  case T_FuncExpr:
1289  {
1290  const FuncExpr *fexpr = (const FuncExpr *) expr;
1291 
1292  /* consider both function name and leftmost arg */
1293  loc = leftmostLoc(fexpr->location,
1294  exprLocation((Node *) fexpr->args));
1295  }
1296  break;
1297  case T_NamedArgExpr:
1298  {
1299  const NamedArgExpr *na = (const NamedArgExpr *) expr;
1300 
1301  /* consider both argument name and value */
1302  loc = leftmostLoc(na->location,
1303  exprLocation((Node *) na->arg));
1304  }
1305  break;
1306  case T_OpExpr:
1307  case T_DistinctExpr: /* struct-equivalent to OpExpr */
1308  case T_NullIfExpr: /* struct-equivalent to OpExpr */
1309  {
1310  const OpExpr *opexpr = (const OpExpr *) expr;
1311 
1312  /* consider both operator name and leftmost arg */
1313  loc = leftmostLoc(opexpr->location,
1314  exprLocation((Node *) opexpr->args));
1315  }
1316  break;
1317  case T_ScalarArrayOpExpr:
1318  {
1319  const ScalarArrayOpExpr *saopexpr = (const ScalarArrayOpExpr *) expr;
1320 
1321  /* consider both operator name and leftmost arg */
1322  loc = leftmostLoc(saopexpr->location,
1323  exprLocation((Node *) saopexpr->args));
1324  }
1325  break;
1326  case T_BoolExpr:
1327  {
1328  const BoolExpr *bexpr = (const BoolExpr *) expr;
1329 
1330  /*
1331  * Same as above, to handle either NOT or AND/OR. We can't
1332  * special-case NOT because of the way that it's used for
1333  * things like IS NOT BETWEEN.
1334  */
1335  loc = leftmostLoc(bexpr->location,
1336  exprLocation((Node *) bexpr->args));
1337  }
1338  break;
1339  case T_SubLink:
1340  {
1341  const SubLink *sublink = (const SubLink *) expr;
1342 
1343  /* check the testexpr, if any, and the operator/keyword */
1344  loc = leftmostLoc(exprLocation(sublink->testexpr),
1345  sublink->location);
1346  }
1347  break;
1348  case T_FieldSelect:
1349  /* just use argument's location */
1350  loc = exprLocation((Node *) ((const FieldSelect *) expr)->arg);
1351  break;
1352  case T_FieldStore:
1353  /* just use argument's location */
1354  loc = exprLocation((Node *) ((const FieldStore *) expr)->arg);
1355  break;
1356  case T_RelabelType:
1357  {
1358  const RelabelType *rexpr = (const RelabelType *) expr;
1359 
1360  /* Much as above */
1361  loc = leftmostLoc(rexpr->location,
1362  exprLocation((Node *) rexpr->arg));
1363  }
1364  break;
1365  case T_CoerceViaIO:
1366  {
1367  const CoerceViaIO *cexpr = (const CoerceViaIO *) expr;
1368 
1369  /* Much as above */
1370  loc = leftmostLoc(cexpr->location,
1371  exprLocation((Node *) cexpr->arg));
1372  }
1373  break;
1374  case T_ArrayCoerceExpr:
1375  {
1376  const ArrayCoerceExpr *cexpr = (const ArrayCoerceExpr *) expr;
1377 
1378  /* Much as above */
1379  loc = leftmostLoc(cexpr->location,
1380  exprLocation((Node *) cexpr->arg));
1381  }
1382  break;
1383  case T_ConvertRowtypeExpr:
1384  {
1385  const ConvertRowtypeExpr *cexpr = (const ConvertRowtypeExpr *) expr;
1386 
1387  /* Much as above */
1388  loc = leftmostLoc(cexpr->location,
1389  exprLocation((Node *) cexpr->arg));
1390  }
1391  break;
1392  case T_CollateExpr:
1393  /* just use argument's location */
1394  loc = exprLocation((Node *) ((const CollateExpr *) expr)->arg);
1395  break;
1396  case T_CaseExpr:
1397  /* CASE keyword should always be the first thing */
1398  loc = ((const CaseExpr *) expr)->location;
1399  break;
1400  case T_CaseWhen:
1401  /* WHEN keyword should always be the first thing */
1402  loc = ((const CaseWhen *) expr)->location;
1403  break;
1404  case T_ArrayExpr:
1405  /* the location points at ARRAY or [, which must be leftmost */
1406  loc = ((const ArrayExpr *) expr)->location;
1407  break;
1408  case T_RowExpr:
1409  /* the location points at ROW or (, which must be leftmost */
1410  loc = ((const RowExpr *) expr)->location;
1411  break;
1412  case T_RowCompareExpr:
1413  /* just use leftmost argument's location */
1414  loc = exprLocation((Node *) ((const RowCompareExpr *) expr)->largs);
1415  break;
1416  case T_CoalesceExpr:
1417  /* COALESCE keyword should always be the first thing */
1418  loc = ((const CoalesceExpr *) expr)->location;
1419  break;
1420  case T_MinMaxExpr:
1421  /* GREATEST/LEAST keyword should always be the first thing */
1422  loc = ((const MinMaxExpr *) expr)->location;
1423  break;
1424  case T_SQLValueFunction:
1425  /* function keyword should always be the first thing */
1426  loc = ((const SQLValueFunction *) expr)->location;
1427  break;
1428  case T_XmlExpr:
1429  {
1430  const XmlExpr *xexpr = (const XmlExpr *) expr;
1431 
1432  /* consider both function name and leftmost arg */
1433  loc = leftmostLoc(xexpr->location,
1434  exprLocation((Node *) xexpr->args));
1435  }
1436  break;
1437  case T_NullTest:
1438  {
1439  const NullTest *nexpr = (const NullTest *) expr;
1440 
1441  /* Much as above */
1442  loc = leftmostLoc(nexpr->location,
1443  exprLocation((Node *) nexpr->arg));
1444  }
1445  break;
1446  case T_BooleanTest:
1447  {
1448  const BooleanTest *bexpr = (const BooleanTest *) expr;
1449 
1450  /* Much as above */
1451  loc = leftmostLoc(bexpr->location,
1452  exprLocation((Node *) bexpr->arg));
1453  }
1454  break;
1455  case T_CoerceToDomain:
1456  {
1457  const CoerceToDomain *cexpr = (const CoerceToDomain *) expr;
1458 
1459  /* Much as above */
1460  loc = leftmostLoc(cexpr->location,
1461  exprLocation((Node *) cexpr->arg));
1462  }
1463  break;
1464  case T_CoerceToDomainValue:
1465  loc = ((const CoerceToDomainValue *) expr)->location;
1466  break;
1467  case T_SetToDefault:
1468  loc = ((const SetToDefault *) expr)->location;
1469  break;
1470  case T_TargetEntry:
1471  /* just use argument's location */
1472  loc = exprLocation((Node *) ((const TargetEntry *) expr)->expr);
1473  break;
1474  case T_IntoClause:
1475  /* use the contained RangeVar's location --- close enough */
1476  loc = exprLocation((Node *) ((const IntoClause *) expr)->rel);
1477  break;
1478  case T_List:
1479  {
1480  /* report location of first list member that has a location */
1481  ListCell *lc;
1482 
1483  loc = -1; /* just to suppress compiler warning */
1484  foreach(lc, (const List *) expr)
1485  {
1486  loc = exprLocation((Node *) lfirst(lc));
1487  if (loc >= 0)
1488  break;
1489  }
1490  }
1491  break;
1492  case T_A_Expr:
1493  {
1494  const A_Expr *aexpr = (const A_Expr *) expr;
1495 
1496  /* use leftmost of operator or left operand (if any) */
1497  /* we assume right operand can't be to left of operator */
1498  loc = leftmostLoc(aexpr->location,
1499  exprLocation(aexpr->lexpr));
1500  }
1501  break;
1502  case T_ColumnRef:
1503  loc = ((const ColumnRef *) expr)->location;
1504  break;
1505  case T_ParamRef:
1506  loc = ((const ParamRef *) expr)->location;
1507  break;
1508  case T_A_Const:
1509  loc = ((const A_Const *) expr)->location;
1510  break;
1511  case T_FuncCall:
1512  {
1513  const FuncCall *fc = (const FuncCall *) expr;
1514 
1515  /* consider both function name and leftmost arg */
1516  /* (we assume any ORDER BY nodes must be to right of name) */
1517  loc = leftmostLoc(fc->location,
1518  exprLocation((Node *) fc->args));
1519  }
1520  break;
1521  case T_A_ArrayExpr:
1522  /* the location points at ARRAY or [, which must be leftmost */
1523  loc = ((const A_ArrayExpr *) expr)->location;
1524  break;
1525  case T_ResTarget:
1526  /* we need not examine the contained expression (if any) */
1527  loc = ((const ResTarget *) expr)->location;
1528  break;
1529  case T_MultiAssignRef:
1530  loc = exprLocation(((const MultiAssignRef *) expr)->source);
1531  break;
1532  case T_TypeCast:
1533  {
1534  const TypeCast *tc = (const TypeCast *) expr;
1535 
1536  /*
1537  * This could represent CAST(), ::, or TypeName 'literal', so
1538  * any of the components might be leftmost.
1539  */
1540  loc = exprLocation(tc->arg);
1541  loc = leftmostLoc(loc, tc->typeName->location);
1542  loc = leftmostLoc(loc, tc->location);
1543  }
1544  break;
1545  case T_CollateClause:
1546  /* just use argument's location */
1547  loc = exprLocation(((const CollateClause *) expr)->arg);
1548  break;
1549  case T_SortBy:
1550  /* just use argument's location (ignore operator, if any) */
1551  loc = exprLocation(((const SortBy *) expr)->node);
1552  break;
1553  case T_WindowDef:
1554  loc = ((const WindowDef *) expr)->location;
1555  break;
1556  case T_RangeTableSample:
1557  loc = ((const RangeTableSample *) expr)->location;
1558  break;
1559  case T_TypeName:
1560  loc = ((const TypeName *) expr)->location;
1561  break;
1562  case T_ColumnDef:
1563  loc = ((const ColumnDef *) expr)->location;
1564  break;
1565  case T_Constraint:
1566  loc = ((const Constraint *) expr)->location;
1567  break;
1568  case T_FunctionParameter:
1569  /* just use typename's location */
1570  loc = exprLocation((Node *) ((const FunctionParameter *) expr)->argType);
1571  break;
1572  case T_XmlSerialize:
1573  /* XMLSERIALIZE keyword should always be the first thing */
1574  loc = ((const XmlSerialize *) expr)->location;
1575  break;
1576  case T_GroupingSet:
1577  loc = ((const GroupingSet *) expr)->location;
1578  break;
1579  case T_WithClause:
1580  loc = ((const WithClause *) expr)->location;
1581  break;
1582  case T_InferClause:
1583  loc = ((const InferClause *) expr)->location;
1584  break;
1585  case T_OnConflictClause:
1586  loc = ((const OnConflictClause *) expr)->location;
1587  break;
1588  case T_CTESearchClause:
1589  loc = ((const CTESearchClause *) expr)->location;
1590  break;
1591  case T_CTECycleClause:
1592  loc = ((const CTECycleClause *) expr)->location;
1593  break;
1594  case T_CommonTableExpr:
1595  loc = ((const CommonTableExpr *) expr)->location;
1596  break;
1597  case T_PlaceHolderVar:
1598  /* just use argument's location */
1599  loc = exprLocation((Node *) ((const PlaceHolderVar *) expr)->phexpr);
1600  break;
1601  case T_InferenceElem:
1602  /* just use nested expr's location */
1603  loc = exprLocation((Node *) ((const InferenceElem *) expr)->expr);
1604  break;
1605  case T_PartitionElem:
1606  loc = ((const PartitionElem *) expr)->location;
1607  break;
1608  case T_PartitionSpec:
1609  loc = ((const PartitionSpec *) expr)->location;
1610  break;
1611  case T_PartitionBoundSpec:
1612  loc = ((const PartitionBoundSpec *) expr)->location;
1613  break;
1614  case T_PartitionRangeDatum:
1615  loc = ((const PartitionRangeDatum *) expr)->location;
1616  break;
1617  default:
1618  /* for any other node type it's just unknown... */
1619  loc = -1;
1620  break;
1621  }
1622  return loc;
1623 }
A_Const
Definition: parsenodes.h:295
exprLocation
int exprLocation(const Node *expr)
Definition: nodeFuncs.c:1250
FuncExpr::args
List * args
Definition: primnodes.h:503
leftmostLoc
static int leftmostLoc(int loc1, int loc2)
Definition: nodeFuncs.c:1631
XmlExpr::location
int location
Definition: primnodes.h:1225
RelabelType::arg
Expr * arg
Definition: primnodes.h:850
Node
Definition: nodes.h:539
fc
static int fc(const char *x)
Definition: preproc-init.c:99
FuncCall::location
int location
Definition: parsenodes.h:371
Var
Definition: primnodes.h:186
BoolExpr::location
int location
Definition: primnodes.h:617
TypeCast::location
int location
Definition: parsenodes.h:310
A_Expr
Definition: parsenodes.h:282
NullTest::arg
Expr * arg
Definition: primnodes.h:1255
OpExpr::location
int location
Definition: primnodes.h:549
BooleanTest::arg
Expr * arg
Definition: primnodes.h:1278
A_Expr::location
int location
Definition: parsenodes.h:289
CoerceViaIO::arg
Expr * arg
Definition: primnodes.h:870
A_Expr::lexpr
Node * lexpr
Definition: parsenodes.h:287
T_List
Definition: nodes.h:305
T_Const
Definition: nodes.h:158
T_Var
Definition: nodes.h:157
TypeCast::typeName
TypeName * typeName
Definition: parsenodes.h:309
XmlExpr::args
List * args
Definition: primnodes.h:1221
CoerceViaIO::location
int location
Definition: primnodes.h:875
NamedArgExpr::arg
Expr * arg
Definition: primnodes.h:524
lfirst
#define lfirst(lc)
Definition: pg_list.h:169
source
static rewind_source * source
Definition: pg_rewind.c:79
TypeName::location
int location
Definition: parsenodes.h:228
NullTest::location
int location
Definition: primnodes.h:1258
FuncCall::args
List * args
Definition: parsenodes.h:362
BoolExpr::args
List * args
Definition: primnodes.h:616
nodeTag
#define nodeTag(nodeptr)
Definition: nodes.h:544
A_ArrayExpr
Definition: parsenodes.h:424
arg
void * arg
Definition: pg_backup_utils.c:27
FuncExpr::location
int location
Definition: primnodes.h:504
OpExpr::args
List * args
Definition: primnodes.h:548
List
Definition: pg_list.h:50
RelabelType::location
int location
Definition: primnodes.h:855
TypeCast::arg
Node * arg
Definition: parsenodes.h:308
T_Param
Definition: nodes.h:159

◆ exprSetCollation()

void exprSetCollation ( Node *  expr,
Oid  collation 
)

Definition at line 1022 of file nodeFuncs.c.

References arg, ARRAY_SUBLINK, Assert, elog, ERROR, EXPR_SUBLINK, exprCollation(), InvalidOid, IS_XMLSERIALIZE, IsA, linitial_node, nodeTag, OidIsValid, SubLink::subLinkType, SubLink::subselect, T_Aggref, T_ArrayCoerceExpr, T_ArrayExpr, T_BooleanTest, T_BoolExpr, T_CaseExpr, T_CoalesceExpr, T_CoerceToDomain, T_CoerceToDomainValue, T_CoerceViaIO, T_Const, T_ConvertRowtypeExpr, T_CurrentOfExpr, T_DistinctExpr, T_FieldSelect, T_FieldStore, T_FuncExpr, T_GroupingFunc, T_MinMaxExpr, T_NamedArgExpr, T_NextValueExpr, T_NullIfExpr, T_NullTest, T_OpExpr, T_Param, T_RelabelType, T_RowCompareExpr, T_RowExpr, T_ScalarArrayOpExpr, T_SetToDefault, T_SQLValueFunction, T_SubLink, T_SubscriptingRef, T_Var, T_WindowFunc, T_XmlExpr, Query::targetList, and generate_unaccent_rules::type.

Referenced by assign_collations_walker().

1023 {
1024  switch (nodeTag(expr))
1025  {
1026  case T_Var:
1027  ((Var *) expr)->varcollid = collation;
1028  break;
1029  case T_Const:
1030  ((Const *) expr)->constcollid = collation;
1031  break;
1032  case T_Param:
1033  ((Param *) expr)->paramcollid = collation;
1034  break;
1035  case T_Aggref:
1036  ((Aggref *) expr)->aggcollid = collation;
1037  break;
1038  case T_GroupingFunc:
1039  Assert(!OidIsValid(collation));
1040  break;
1041  case T_WindowFunc:
1042  ((WindowFunc *) expr)->wincollid = collation;
1043  break;
1044  case T_SubscriptingRef:
1045  ((SubscriptingRef *) expr)->refcollid = collation;
1046  break;
1047  case T_FuncExpr:
1048  ((FuncExpr *) expr)->funccollid = collation;
1049  break;
1050  case T_NamedArgExpr:
1051  Assert(collation == exprCollation((Node *) ((NamedArgExpr *) expr)->arg));
1052  break;
1053  case T_OpExpr:
1054  ((OpExpr *) expr)->opcollid = collation;
1055  break;
1056  case T_DistinctExpr:
1057  ((DistinctExpr *) expr)->opcollid = collation;
1058  break;
1059  case T_NullIfExpr:
1060  ((NullIfExpr *) expr)->opcollid = collation;
1061  break;
1062  case T_ScalarArrayOpExpr:
1063  /* ScalarArrayOpExpr's result is boolean ... */
1064  Assert(!OidIsValid(collation)); /* ... so never set a collation */
1065  break;
1066  case T_BoolExpr:
1067  /* BoolExpr's result is boolean ... */
1068  Assert(!OidIsValid(collation)); /* ... so never set a collation */
1069  break;
1070  case T_SubLink:
1071 #ifdef USE_ASSERT_CHECKING
1072  {
1073  SubLink *sublink = (SubLink *) expr;
1074 
1075  if (sublink->subLinkType == EXPR_SUBLINK ||
1076  sublink->subLinkType == ARRAY_SUBLINK)
1077  {
1078  /* get the collation of subselect's first target column */
1079  Query *qtree = (Query *) sublink->subselect;
1080  TargetEntry *tent;
1081 
1082  if (!qtree || !IsA(qtree, Query))
1083  elog(ERROR, "cannot set collation for untransformed sublink");
1084  tent = linitial_node(TargetEntry, qtree->targetList);
1085  Assert(!tent->resjunk);
1086  Assert(collation == exprCollation((Node *) tent->expr));
1087  }
1088  else
1089  {
1090  /* otherwise, result is RECORD or BOOLEAN */
1091  Assert(!OidIsValid(collation));
1092  }
1093  }
1094 #endif /* USE_ASSERT_CHECKING */
1095  break;
1096  case T_FieldSelect:
1097  ((FieldSelect *) expr)->resultcollid = collation;
1098  break;
1099  case T_FieldStore:
1100  /* FieldStore's result is composite ... */
1101  Assert(!OidIsValid(collation)); /* ... so never set a collation */
1102  break;
1103  case T_RelabelType:
1104  ((RelabelType *) expr)->resultcollid = collation;
1105  break;
1106  case T_CoerceViaIO:
1107  ((CoerceViaIO *) expr)->resultcollid = collation;
1108  break;
1109  case T_ArrayCoerceExpr:
1110  ((ArrayCoerceExpr *) expr)->resultcollid = collation;
1111  break;
1112  case T_ConvertRowtypeExpr:
1113  /* ConvertRowtypeExpr's result is composite ... */
1114  Assert(!OidIsValid(collation)); /* ... so never set a collation */
1115  break;
1116  case T_CaseExpr:
1117  ((CaseExpr *) expr)->casecollid = collation;
1118  break;
1119  case T_ArrayExpr:
1120  ((ArrayExpr *) expr)->array_collid = collation;
1121  break;
1122  case T_RowExpr:
1123  /* RowExpr's result is composite ... */
1124  Assert(!OidIsValid(collation)); /* ... so never set a collation */
1125  break;
1126  case T_RowCompareExpr:
1127  /* RowCompareExpr's result is boolean ... */
1128  Assert(!OidIsValid(collation)); /* ... so never set a collation */
1129  break;
1130  case T_CoalesceExpr:
1131  ((CoalesceExpr *) expr)->coalescecollid = collation;
1132  break;
1133  case T_MinMaxExpr:
1134  ((MinMaxExpr *) expr)->minmaxcollid = collation;
1135  break;
1136  case T_SQLValueFunction:
1137  Assert((((SQLValueFunction *) expr)->type == NAMEOID) ?
1138  (collation == C_COLLATION_OID) :
1139  (collation == InvalidOid));
1140  break;
1141  case T_XmlExpr:
1142  Assert((((XmlExpr *) expr)->op == IS_XMLSERIALIZE) ?
1143  (collation == DEFAULT_COLLATION_OID) :
1144  (collation == InvalidOid));
1145  break;
1146  case T_NullTest:
1147  /* NullTest's result is boolean ... */
1148  Assert(!OidIsValid(collation)); /* ... so never set a collation */
1149  break;
1150  case T_BooleanTest:
1151  /* BooleanTest's result is boolean ... */
1152  Assert(!OidIsValid(collation)); /* ... so never set a collation */
1153  break;
1154  case T_CoerceToDomain:
1155  ((CoerceToDomain *) expr)->resultcollid = collation;
1156  break;
1157  case T_CoerceToDomainValue:
1158  ((CoerceToDomainValue *) expr)->collation = collation;
1159  break;
1160  case T_SetToDefault:
1161  ((SetToDefault *) expr)->collation = collation;
1162  break;
1163  case T_CurrentOfExpr:
1164  /* CurrentOfExpr's result is boolean ... */
1165  Assert(!OidIsValid(collation)); /* ... so never set a collation */
1166  break;
1167  case T_NextValueExpr:
1168  /* NextValueExpr's result is an integer type ... */
1169  Assert(!OidIsValid(collation)); /* ... so never set a collation */
1170  break;
1171  default:
1172  elog(ERROR, "unrecognized node type: %d", (int) nodeTag(expr));
1173  break;
1174  }
1175 }
IsA
#define IsA(nodeptr, _type_)
Definition: nodes.h:590
Node
Definition: nodes.h:539
generate_unaccent_rules.type
type
Definition: generate_unaccent_rules.py:282
Var
Definition: primnodes.h:186
linitial_node
#define linitial_node(type, l)
Definition: pg_list.h:177
OidIsValid
#define OidIsValid(objectId)
Definition: c.h:710
Query::targetList
List * targetList
Definition: parsenodes.h:150
ERROR
#define ERROR
Definition: elog.h:46
T_Const
Definition: nodes.h:158
T_Var
Definition: nodes.h:157
InvalidOid
#define InvalidOid
Definition: postgres_ext.h:36
Assert
#define Assert(condition)
Definition: c.h:804
exprCollation
Oid exprCollation(const Node *expr)
Definition: nodeFuncs.c:759
nodeTag
#define nodeTag(nodeptr)
Definition: nodes.h:544
elog
#define elog(elevel,...)
Definition: elog.h:232
arg
void * arg
Definition: pg_backup_utils.c:27
T_Param
Definition: nodes.h:159

◆ exprSetInputCollation()

void exprSetInputCollation ( Node *  expr,
Oid  inputcollation 
)

Definition at line 1186 of file nodeFuncs.c.

References nodeTag, T_Aggref, T_DistinctExpr, T_FuncExpr, T_MinMaxExpr, T_NullIfExpr, T_OpExpr, T_ScalarArrayOpExpr, and T_WindowFunc.

Referenced by assign_collations_walker().

1187 {
1188  switch (nodeTag(expr))
1189  {
1190  case T_Aggref:
1191  ((Aggref *) expr)->inputcollid = inputcollation;
1192  break;
1193  case T_WindowFunc:
1194  ((WindowFunc *) expr)->inputcollid = inputcollation;
1195  break;
1196  case T_FuncExpr:
1197  ((FuncExpr *) expr)->inputcollid = inputcollation;
1198  break;
1199  case T_OpExpr:
1200  ((OpExpr *) expr)->inputcollid = inputcollation;
1201  break;
1202  case T_DistinctExpr:
1203  ((DistinctExpr *) expr)->inputcollid = inputcollation;
1204  break;
1205  case T_NullIfExpr:
1206  ((NullIfExpr *) expr)->inputcollid = inputcollation;
1207  break;
1208  case T_ScalarArrayOpExpr:
1209  ((ScalarArrayOpExpr *) expr)->inputcollid = inputcollation;
1210  break;
1211  case T_MinMaxExpr:
1212  ((MinMaxExpr *) expr)->inputcollid = inputcollation;
1213  break;
1214  default:
1215  break;
1216  }
1217 }
nodeTag
#define nodeTag(nodeptr)
Definition: nodes.h:544

◆ exprType()

Oid exprType ( const Node *  expr)

Definition at line 41 of file nodeFuncs.c.

References arg, ARRAY_SUBLINK, Assert, elog, ereport, errcode(), errmsg(), ERROR, InferenceElem::expr, EXPR_SUBLINK, exprType(), SubPlan::firstColType, format_type_be(), get_promoted_array_type(), InvalidOid, IS_DOCUMENT, IS_XMLSERIALIZE, IsA, linitial, linitial_node, MULTIEXPR_SUBLINK, nodeTag, OidIsValid, SubLink::subLinkType, SubPlan::subLinkType, AlternativeSubPlan::subplans, SubLink::subselect, T_Aggref, T_AlternativeSubPlan, T_ArrayCoerceExpr, T_ArrayExpr, T_BooleanTest, T_BoolExpr, T_CaseExpr, T_CaseTestExpr, T_CoalesceExpr, T_CoerceToDomain, T_CoerceToDomainValue, T_CoerceViaIO, T_CollateExpr, T_Const, T_ConvertRowtypeExpr, T_CurrentOfExpr, T_DistinctExpr, T_FieldSelect, T_FieldStore, T_FuncExpr, T_GroupingFunc, T_InferenceElem, T_MinMaxExpr, T_NamedArgExpr, T_NextValueExpr, T_NullIfExpr, T_NullTest, T_OpExpr, T_Param, T_PlaceHolderVar, T_RelabelType, T_RowCompareExpr, T_RowExpr, T_ScalarArrayOpExpr, T_SetToDefault, T_SQLValueFunction, T_SubLink, T_SubPlan, T_SubscriptingRef, T_Var, T_WindowFunc, T_XmlExpr, Query::targetList, and generate_unaccent_rules::type.

Referenced by add_row_identity_var(), addRangeTableEntryForFunction(), addRangeTableEntryForSubquery(), addTargetToGroupList(), addTargetToSortList(), analyzeCTE(), analyzeCTETargetList(), appendAggOrderBy(), applyRelabelType(), array_subscript_transform(), assign_collations_walker(), assign_hypothetical_collations(), assign_param_for_placeholdervar(), ATExecAlterColumnType(), ATPrepAlterColumnType(), build_coercion_expression(), build_column_default(), build_subplan(), can_minmax_aggs(), canonicalize_ec_expression(), check_functions_in_node(), check_hashjoinable(), check_mergejoinable(), check_resultcacheable(), check_sql_fn_retval(), checkRuleResultList(), coerce_fn_result_column(), coerce_record_to_complex(), coerce_to_boolean(), coerce_to_common_type(), coerce_to_specific_type_typmod(), compare_tlist_datatypes(), compute_semijoin_info(), ComputeIndexAttrs(), ComputePartitionAttrs(), ConstructTupleDescriptor(), convert_EXISTS_to_ANY(), cookDefault(), cost_qual_eval_walker(), create_ctas_nodata(), create_indexscan_plan(), CreateStatistics(), DefineVirtualRelation(), deparseNullTest(), estimate_num_groups(), eval_const_expressions_mutator(), EvaluateParams(), examine_attribute(), examine_expression(), examine_variable(), exec_save_simple_expr(), ExecBuildProjectionInfo(), ExecBuildUpdateProjection(), ExecCheckPlanOutput(), ExecEvalXmlExpr(), ExecInitExprRec(), ExecInitIndexScan(), ExecMakeTableFunctionResult(), ExecTypeFromExprList(), ExecTypeFromTLInternal(), ExecWindowAgg(), expandRecordVariable(), expandRTE(), exprType(), exprTypmod(), find_expr_references_walker(), find_placeholder_info(), fix_indexqual_operand(), foreign_expr_walker(), generate_append_tlist(), generate_join_implied_equalities_normal(), generate_setop_tlist(), generate_subquery_params(), generateClonedIndexStmt(), get_call_expr_argtype(), get_expr_result_tupdesc(), get_expr_result_type(), get_first_col_type(), get_fn_expr_rettype(), get_func_expr(), get_oper_expr(), get_rule_expr(), get_rule_expr_funccall(), get_rule_orderby(), get_simple_binary_op_name(), get_sublink_expr(), get_windowfunc_expr(), GetIndexInputType(), hash_ok_operator(), hstore_subscript_transform(), initialize_peragg(), inline_function(), internal_get_result_type(), jsonb_exec_setup(), jsonb_subscript_transform(), make_op(), make_scalar_array_op(), makeVarFromTargetEntry(), makeWholeRowVar(), match_pattern_prefix(), ordered_set_startup(), paraminfo_get_equal_hashops(), ParseFuncOrColumn(), pg_get_indexdef_worker(), pg_get_partkeydef_worker(), prepare_query_params(), preprocess_aggref(), preprocess_minmax_aggregates(), ProcedureCreate(), process_equivalence(), process_matched_tle(), recheck_cast_function_args(), relabel_to_typmod(), RelationBuildPartitionKey(), RelationGetDummyIndexExpressions(), remove_unused_subquery_outputs(), replace_nestloop_param_placeholdervar(), replace_outer_grouping(), replace_outer_placeholdervar(), resolveTargetListUnknowns(), scalararraysel(), select_common_type(), select_common_typmod(), set_append_rel_size(), set_dummy_tlist_references(), set_joinrel_partition_key_exprs(), set_pathtarget_cost_width(), set_rel_width(), show_sortorder_options(), tlist_same_datatypes(), transformAExprNullIf(), transformAggregateCall(), transformArrayExpr(), transformAssignedExpr(), transformAssignmentIndirection(), transformAssignmentSubscripts(), transformCaseExpr(), transformCollateClause(), transformExprRecurse(), transformFrameOffset(), transformFromClauseItem(), transformIndirection(), transformInsertStmt(), transformMultiAssignRef(), transformPartitionBoundValue(), transformPLAssignStmt(), transformSetOperationTree(), transformSubLink(), transformTypeCast(), unknown_attribute(), and xmlelement().

42 {
43  Oid type;
44 
45  if (!expr)
46  return InvalidOid;
47 
48  switch (nodeTag(expr))
49  {
50  case T_Var:
51  type = ((const Var *) expr)->vartype;
52  break;
53  case T_Const:
54  type = ((const Const *) expr)->consttype;
55  break;
56  case T_Param:
57  type = ((const Param *) expr)->paramtype;
58  break;
59  case T_Aggref:
60  type = ((const Aggref *) expr)->aggtype;
61  break;
62  case T_GroupingFunc:
63  type = INT4OID;
64  break;
65  case T_WindowFunc:
66  type = ((const WindowFunc *) expr)->wintype;
67  break;
68  case T_SubscriptingRef:
69  type = ((const SubscriptingRef *) expr)->refrestype;
70  break;
71  case T_FuncExpr:
72  type = ((const FuncExpr *) expr)->funcresulttype;
73  break;
74  case T_NamedArgExpr:
75  type = exprType((Node *) ((const NamedArgExpr *) expr)->arg);
76  break;
77  case T_OpExpr:
78  type = ((const OpExpr *) expr)->opresulttype;
79  break;
80  case T_DistinctExpr:
81  type = ((const DistinctExpr *) expr)->opresulttype;
82  break;
83  case T_NullIfExpr:
84  type = ((const NullIfExpr *) expr)->opresulttype;
85  break;
86  case T_ScalarArrayOpExpr:
87  type = BOOLOID;
88  break;
89  case T_BoolExpr:
90  type = BOOLOID;
91  break;
92  case T_SubLink:
93  {
94  const SubLink *sublink = (const SubLink *) expr;
95 
96  if (sublink->subLinkType == EXPR_SUBLINK ||
97  sublink->subLinkType == ARRAY_SUBLINK)
98  {
99  /* get the type of the subselect's first target column */
100  Query *qtree = (Query *) sublink->subselect;
101  TargetEntry *tent;
102 
103  if (!qtree || !IsA(qtree, Query))
104  elog(ERROR, "cannot get type for untransformed sublink");
105  tent = linitial_node(TargetEntry, qtree->targetList);
106  Assert(!tent->resjunk);
107  type = exprType((Node *) tent->expr);
108  if (sublink->subLinkType == ARRAY_SUBLINK)
109  {
110  type = get_promoted_array_type(type);
111  if (!OidIsValid(type))
112  ereport(ERROR,
113  (errcode(ERRCODE_UNDEFINED_OBJECT),
114  errmsg("could not find array type for data type %s",
115  format_type_be(exprType((Node *) tent->expr)))));
116  }
117  }
118  else if (sublink->subLinkType == MULTIEXPR_SUBLINK)
119  {
120  /* MULTIEXPR is always considered to return RECORD */
121  type = RECORDOID;
122  }
123  else
124  {
125  /* for all other sublink types, result is boolean */
126  type = BOOLOID;
127  }
128  }
129  break;
130  case T_SubPlan:
131  {
132  const SubPlan *subplan = (const SubPlan *) expr;
133 
134  if (subplan->subLinkType == EXPR_SUBLINK ||
135  subplan->subLinkType == ARRAY_SUBLINK)
136  {
137  /* get the type of the subselect's first target column */
138  type = subplan->firstColType;
139  if (subplan->subLinkType == ARRAY_SUBLINK)
140  {
141  type = get_promoted_array_type(type);
142  if (!OidIsValid(type))
143  ereport(ERROR,
144  (errcode(ERRCODE_UNDEFINED_OBJECT),
145  errmsg("could not find array type for data type %s",
146  format_type_be(subplan->firstColType))));
147  }
148  }
149  else if (subplan->subLinkType == MULTIEXPR_SUBLINK)
150  {
151  /* MULTIEXPR is always considered to return RECORD */
152  type = RECORDOID;
153  }
154  else
155  {
156  /* for all other subplan types, result is boolean */
157  type = BOOLOID;
158  }
159  }
160  break;
161  case T_AlternativeSubPlan:
162  {
163  const AlternativeSubPlan *asplan = (const AlternativeSubPlan *) expr;
164 
165  /* subplans should all return the same thing */
166  type = exprType((Node *) linitial(asplan->subplans));
167  }
168  break;
169  case T_FieldSelect:
170  type = ((const FieldSelect *) expr)->resulttype;
171  break;
172  case T_FieldStore:
173  type = ((const FieldStore *) expr)->resulttype;
174  break;
175  case T_RelabelType:
176  type = ((const RelabelType *) expr)->resulttype;
177  break;
178  case T_CoerceViaIO:
179  type = ((const CoerceViaIO *) expr)->resulttype;
180  break;
181  case T_ArrayCoerceExpr:
182  type = ((const ArrayCoerceExpr *) expr)->resulttype;
183  break;
184  case T_ConvertRowtypeExpr:
185  type = ((const ConvertRowtypeExpr *) expr)->resulttype;
186  break;
187  case T_CollateExpr:
188  type = exprType((Node *) ((const CollateExpr *) expr)->arg);
189  break;
190  case T_CaseExpr:
191  type = ((const CaseExpr *) expr)->casetype;
192  break;
193  case T_CaseTestExpr:
194  type = ((const CaseTestExpr *) expr)->typeId;
195  break;
196  case T_ArrayExpr:
197  type = ((const ArrayExpr *) expr)->array_typeid;
198  break;
199  case T_RowExpr:
200  type = ((const RowExpr *) expr)->row_typeid;
201  break;
202  case T_RowCompareExpr:
203  type = BOOLOID;
204  break;
205  case T_CoalesceExpr:
206  type = ((const CoalesceExpr *) expr)->coalescetype;
207  break;
208  case T_MinMaxExpr:
209  type = ((const MinMaxExpr *) expr)->minmaxtype;
210  break;
211  case T_SQLValueFunction:
212  type = ((const SQLValueFunction *) expr)->type;
213  break;
214  case T_XmlExpr:
215  if (((const XmlExpr *) expr)->op == IS_DOCUMENT)
216  type = BOOLOID;
217  else if (((const XmlExpr *) expr)->op == IS_XMLSERIALIZE)
218  type = TEXTOID;
219  else
220  type = XMLOID;
221  break;
222  case T_NullTest:
223  type = BOOLOID;
224  break;
225  case T_BooleanTest:
226  type = BOOLOID;
227  break;
228  case T_CoerceToDomain:
229  type = ((const CoerceToDomain *) expr)->resulttype;
230  break;
231  case T_CoerceToDomainValue:
232  type = ((const CoerceToDomainValue *) expr)->typeId;
233  break;
234  case T_SetToDefault:
235  type = ((const SetToDefault *) expr)->typeId;
236  break;
237  case T_CurrentOfExpr:
238  type = BOOLOID;
239  break;
240  case T_NextValueExpr:
241  type = ((const NextValueExpr *) expr)->typeId;
242  break;
243  case T_InferenceElem:
244  {
245  const InferenceElem *n = (const InferenceElem *) expr;
246 
247  type = exprType((Node *) n->expr);
248  }
249  break;
250  case T_PlaceHolderVar:
251  type = exprType((Node *) ((const PlaceHolderVar *) expr)->phexpr);
252  break;
253  default:
254  elog(ERROR, "unrecognized node type: %d", (int) nodeTag(expr));
255  type = InvalidOid; /* keep compiler quiet */
256  break;
257  }
258  return type;
259 }
SubPlan::firstColType
Oid firstColType
Definition: primnodes.h:746
IsA
#define IsA(nodeptr, _type_)
Definition: nodes.h:590
SubPlan::subLinkType
SubLinkType subLinkType
Definition: primnodes.h:737
Node
Definition: nodes.h:539
errcode
int errcode(int sqlerrcode)
Definition: elog.c:698
format_type_be
char * format_type_be(Oid type_oid)
Definition: format_type.c:339
generate_unaccent_rules.type
type
Definition: generate_unaccent_rules.py:282
Oid
unsigned int Oid
Definition: postgres_ext.h:31
Var
Definition: primnodes.h:186
linitial_node
#define linitial_node(type, l)
Definition: pg_list.h:177
OidIsValid
#define OidIsValid(objectId)
Definition: c.h:710
Query::targetList
List * targetList
Definition: parsenodes.h:150
linitial
#define linitial(l)
Definition: pg_list.h:174
ERROR
#define ERROR
Definition: elog.h:46
T_Const
Definition: nodes.h:158
T_Var
Definition: nodes.h:157
get_promoted_array_type
Oid get_promoted_array_type(Oid typid)
Definition: lsyscache.c:2758
InvalidOid
#define InvalidOid
Definition: postgres_ext.h:36
ereport
#define ereport(elevel,...)
Definition: elog.h:157
Assert
#define Assert(condition)
Definition: c.h:804
exprType
Oid exprType(const Node *expr)
Definition: nodeFuncs.c:41
nodeTag
#define nodeTag(nodeptr)
Definition: nodes.h:544
errmsg
int errmsg(const char *fmt,...)
Definition: elog.c:909
elog
#define elog(elevel,...)
Definition: elog.h:232
arg
void * arg
Definition: pg_backup_utils.c:27
T_Param
Definition: nodes.h:159

◆ exprTypmod()

int32 exprTypmod ( const Node *  expr)

Definition at line 267 of file nodeFuncs.c.

References arg, OpExpr::args, CaseExpr::args, CoalesceExpr::args, MinMaxExpr::args, ARRAY_SUBLINK, ArrayExpr::array_typeid, Assert, CaseExpr::casetype, CoalesceExpr::coalescetype, CaseExpr::defresult, ArrayExpr::element_typeid, ArrayExpr::elements, elog, ERROR, EXPR_SUBLINK, exprIsLengthCoercion(), exprType(), exprTypmod(), SubPlan::firstColTypmod, for_each_from, IsA, lfirst, lfirst_node, linitial, linitial_node, MinMaxExpr::minmaxtype, ArrayExpr::multidims, NIL, nodeTag, CaseWhen::result, SubLink::subLinkType, SubPlan::subLinkType, AlternativeSubPlan::subplans, SubLink::subselect, T_AlternativeSubPlan, T_ArrayCoerceExpr, T_ArrayExpr, T_CaseExpr, T_CaseTestExpr, T_CoalesceExpr, T_CoerceToDomain, T_CoerceToDomainValue, T_CollateExpr, T_Const, T_FieldSelect, T_FuncExpr, T_MinMaxExpr, T_NamedArgExpr, T_NullIfExpr, T_Param, T_PlaceHolderVar, T_RelabelType, T_SetToDefault, T_SQLValueFunction, T_SubLink, T_SubPlan, T_SubscriptingRef, T_Var, and Query::targetList.

Referenced by add_row_identity_var(), addRangeTableEntryForFunction(), addRangeTableEntryForSubquery(), analyzeCTE(), analyzeCTETargetList(), applyRelabelType(), assign_hypothetical_collations(), build_coercion_expression(), build_subplan(), canonicalize_ec_expression(), checkRuleResultList(), coerce_type_typmod(), ConstructTupleDescriptor(), convert_EXISTS_to_ANY(), create_ctas_nodata(), DefineVirtualRelation(), eval_const_expressions_mutator(), examine_attribute(), examine_expression(), examine_variable(), exec_save_simple_expr(), ExecTypeFromExprList(), ExecTypeFromTLInternal(), expandRecordVariable(), expandRTE(), exprTypmod(), find_placeholder_info(), generate_append_tlist(), generate_setop_tlist(), generate_subquery_params(), get_expr_result_type(), get_first_col_type(), get_rule_expr(), get_rule_expr_funccall(), interval_support(), makeVarFromTargetEntry(), numeric_support(), preprocess_aggref(), RelationBuildPartitionKey(), RelationGetDummyIndexExpressions(), remove_unused_subquery_outputs(), replace_nestloop_param_placeholdervar(), replace_outer_placeholdervar(), select_common_typmod(), set_append_rel_size(), set_dummy_tlist_references(), set_pathtarget_cost_width(), set_rel_width(), TemporalSimplify(), transformCaseExpr(), transformFromClauseItem(), transformIndirection(), transformInsertStmt(), transformMultiAssignRef(), transformPLAssignStmt(), transformSubLink(), varbit_support(), and varchar_support().

268 {
269  if (!expr)
270  return -1;
271 
272  switch (nodeTag(expr))
273  {
274  case T_Var:
275  return ((const Var *) expr)->vartypmod;
276  case T_Const:
277  return ((const Const *) expr)->consttypmod;
278  case T_Param:
279  return ((const Param *) expr)->paramtypmod;
280  case T_SubscriptingRef:
281  return ((const SubscriptingRef *) expr)->reftypmod;
282  case T_FuncExpr:
283  {
284  int32 coercedTypmod;
285 
286  /* Be smart about length-coercion functions... */
287  if (exprIsLengthCoercion(expr, &coercedTypmod))
288  return coercedTypmod;
289  }
290  break;
291  case T_NamedArgExpr:
292  return exprTypmod((Node *) ((const NamedArgExpr *) expr)->arg);
293  case T_NullIfExpr:
294  {
295  /*
296  * Result is either first argument or NULL, so we can report
297  * first argument's typmod if known.
298  */
299  const NullIfExpr *nexpr = (const NullIfExpr *) expr;
300 
301  return exprTypmod((Node *) linitial(nexpr->args));
302  }
303  break;
304  case T_SubLink:
305  {
306  const SubLink *sublink = (const SubLink *) expr;
307 
308  if (sublink->subLinkType == EXPR_SUBLINK ||
309  sublink->subLinkType == ARRAY_SUBLINK)
310  {
311  /* get the typmod of the subselect's first target column */
312  Query *qtree = (Query *) sublink->subselect;
313  TargetEntry *tent;
314 
315  if (!qtree || !IsA(qtree, Query))
316  elog(ERROR, "cannot get type for untransformed sublink");
317  tent = linitial_node(TargetEntry, qtree->targetList);
318  Assert(!tent->resjunk);
319  return exprTypmod((Node *) tent->expr);
320  /* note we don't need to care if it's an array */
321  }
322  /* otherwise, result is RECORD or BOOLEAN, typmod is -1 */
323  }
324  break;
325  case T_SubPlan:
326  {
327  const SubPlan *subplan = (const SubPlan *) expr;
328 
329  if (subplan->subLinkType == EXPR_SUBLINK ||
330  subplan->subLinkType == ARRAY_SUBLINK)
331  {
332  /* get the typmod of the subselect's first target column */
333  /* note we don't need to care if it's an array */
334  return subplan->firstColTypmod;
335  }
336  /* otherwise, result is RECORD or BOOLEAN, typmod is -1 */
337  }
338  break;
339  case T_AlternativeSubPlan:
340  {
341  const AlternativeSubPlan *asplan = (const AlternativeSubPlan *) expr;
342 
343  /* subplans should all return the same thing */
344  return exprTypmod((Node *) linitial(asplan->subplans));
345  }
346  break;
347  case T_FieldSelect:
348  return ((const FieldSelect *) expr)->resulttypmod;
349  case T_RelabelType:
350  return ((const RelabelType *) expr)->resulttypmod;
351  case T_ArrayCoerceExpr:
352  return ((const ArrayCoerceExpr *) expr)->resulttypmod;
353  case T_CollateExpr:
354  return exprTypmod((Node *) ((const CollateExpr *) expr)->arg);
355  case T_CaseExpr:
356  {
357  /*
358  * If all the alternatives agree on type/typmod, return that
359  * typmod, else use -1
360  */
361  const CaseExpr *cexpr = (const CaseExpr *) expr;
362  Oid casetype = cexpr->casetype;
363  int32 typmod;
364  ListCell *arg;
365 
366  if (!cexpr->defresult)
367  return -1;
368  if (exprType((Node *) cexpr->defresult) != casetype)
369  return -1;
370  typmod = exprTypmod((Node *) cexpr->defresult);
371  if (typmod < 0)
372  return -1; /* no point in trying harder */
373  foreach(arg, cexpr->args)
374  {
375  CaseWhen *w = lfirst_node(CaseWhen, arg);
376 
377  if (exprType((Node *) w->result) != casetype)
378  return -1;
379  if (exprTypmod((Node *) w->result) != typmod)
380  return -1;
381  }
382  return typmod;
383  }
384  break;
385  case T_CaseTestExpr:
386  return ((const CaseTestExpr *) expr)->typeMod;
387  case T_ArrayExpr:
388  {
389  /*
390  * If all the elements agree on type/typmod, return that
391  * typmod, else use -1
392  */
393  const ArrayExpr *arrayexpr = (const ArrayExpr *) expr;
394  Oid commontype;
395  int32 typmod;
396  ListCell *elem;
397 
398  if (arrayexpr->elements == NIL)
399  return -1;
400  typmod = exprTypmod((Node *) linitial(arrayexpr->elements));
401  if (typmod < 0)
402  return -1; /* no point in trying harder */
403  if (arrayexpr->multidims)
404  commontype = arrayexpr->array_typeid;
405  else
406  commontype = arrayexpr->element_typeid;
407  foreach(elem, arrayexpr->elements)
408  {
409  Node *e = (Node *) lfirst(elem);
410 
411  if (exprType(e) != commontype)
412  return -1;
413  if (exprTypmod(e) != typmod)
414  return -1;
415  }
416  return typmod;
417  }
418  break;
419  case T_CoalesceExpr:
420  {
421  /*
422  * If all the alternatives agree on type/typmod, return that
423  * typmod, else use -1
424  */
425  const CoalesceExpr *cexpr = (const CoalesceExpr *) expr;
426  Oid coalescetype = cexpr->coalescetype;
427  int32 typmod;
428  ListCell *arg;
429 
430  if (exprType((Node *) linitial(cexpr->args)) != coalescetype)
431  return -1;
432  typmod = exprTypmod((Node *) linitial(cexpr->args));
433  if (typmod < 0)
434  return -1; /* no point in trying harder */
435  for_each_from(arg, cexpr->args, 1)
436  {
437  Node *e = (Node *) lfirst(arg);
438 
439  if (exprType(e) != coalescetype)
440  return -1;
441  if (exprTypmod(e) != typmod)
442  return -1;
443  }
444  return typmod;
445  }
446  break;
447  case T_MinMaxExpr:
448  {
449  /*
450  * If all the alternatives agree on type/typmod, return that
451  * typmod, else use -1
452  */
453  const MinMaxExpr *mexpr = (const MinMaxExpr *) expr;
454  Oid minmaxtype = mexpr->minmaxtype;
455  int32 typmod;
456  ListCell *arg;
457 
458  if (exprType((Node *) linitial(mexpr->args)) != minmaxtype)
459  return -1;
460  typmod = exprTypmod((Node *) linitial(mexpr->args));
461  if (typmod < 0)
462  return -1; /* no point in trying harder */
463  for_each_from(arg, mexpr->args, 1)
464  {
465  Node *e = (Node *) lfirst(arg);
466 
467  if (exprType(e) != minmaxtype)
468  return -1;
469  if (exprTypmod(e) != typmod)
470  return -1;
471  }
472  return typmod;
473  }
474  break;
475  case T_SQLValueFunction:
476  return ((const SQLValueFunction *) expr)->typmod;
477  case T_CoerceToDomain:
478  return ((const CoerceToDomain *) expr)->resulttypmod;
479  case T_CoerceToDomainValue:
480  return ((const CoerceToDomainValue *) expr)->typeMod;
481  case T_SetToDefault:
482  return ((const SetToDefault *) expr)->typeMod;
483  case T_PlaceHolderVar:
484  return exprTypmod((Node *) ((const PlaceHolderVar *) expr)->phexpr);
485  default:
486  break;
487  }
488  return -1;
489 }
MinMaxExpr::minmaxtype
Oid minmaxtype
Definition: primnodes.h:1138
ArrayExpr::multidims
bool multidims
Definition: primnodes.h:1028
NIL
#define NIL
Definition: pg_list.h:65
MinMaxExpr::args
List * args
Definition: primnodes.h:1142
IsA
#define IsA(nodeptr, _type_)
Definition: nodes.h:590
exprTypmod
int32 exprTypmod(const Node *expr)
Definition: nodeFuncs.c:267
SubPlan::subLinkType
SubLinkType subLinkType
Definition: primnodes.h:737
Node
Definition: nodes.h:539
exprIsLengthCoercion
bool exprIsLengthCoercion(const Node *expr, int32 *coercedTypmod)
Definition: nodeFuncs.c:503
ArrayExpr::array_typeid
Oid array_typeid
Definition: primnodes.h:1024
CaseExpr::casetype
Oid casetype
Definition: primnodes.h:966
Oid
unsigned int Oid
Definition: postgres_ext.h:31
Var
Definition: primnodes.h:186
linitial_node
#define linitial_node(type, l)
Definition: pg_list.h:177
int32
signed int int32
Definition: c.h:429
Query::targetList
List * targetList
Definition: parsenodes.h:150
linitial
#define linitial(l)
Definition: pg_list.h:174
ERROR
#define ERROR
Definition: elog.h:46
CoalesceExpr::args
List * args
Definition: primnodes.h:1122
lfirst_node
#define lfirst_node(type, lc)
Definition: pg_list.h:172
ArrayExpr::elements
List * elements
Definition: primnodes.h:1027
T_Const
Definition: nodes.h:158
T_Var
Definition: nodes.h:157
CaseExpr::args
List * args
Definition: primnodes.h:969
SubPlan::firstColTypmod
int32 firstColTypmod
Definition: primnodes.h:747
Assert
#define Assert(condition)
Definition: c.h:804
lfirst
#define lfirst(lc)
Definition: pg_list.h:169
exprType
Oid exprType(const Node *expr)
Definition: nodeFuncs.c:41
for_each_from
#define for_each_from(cell, lst, N)
Definition: pg_list.h:393
nodeTag
#define nodeTag(nodeptr)
Definition: nodes.h:544
ArrayExpr::element_typeid
Oid element_typeid
Definition: primnodes.h:1026
e
e
Definition: preproc-init.c:82
elog
#define elog(elevel,...)
Definition: elog.h:232
CoalesceExpr::coalescetype
Oid coalescetype
Definition: primnodes.h:1120
arg
void * arg
Definition: pg_backup_utils.c:27
CaseWhen::result
Expr * result
Definition: primnodes.h:981
OpExpr::args
List * args
Definition: primnodes.h:548
CaseExpr::defresult
Expr * defresult
Definition: primnodes.h:970
T_Param
Definition: nodes.h:159

◆ fix_opfuncids()

void fix_opfuncids ( Node *  node)

Definition at line 1652 of file nodeFuncs.c.

References fix_opfuncids_walker().

Referenced by evaluate_expr(), expression_planner(), expression_planner_with_deps(), fetch_statentries_for_relation(), get_qual_for_range(), get_relation_statistics(), operator_predicate_proof(), RelationBuildPartitionKey(), RelationGetIndexExpressions(), and RelationGetIndexPredicate().

1653 {
1654  /* This tree walk requires no special setup, so away we go... */
1655  fix_opfuncids_walker(node, NULL);
1656 }
fix_opfuncids_walker
static bool fix_opfuncids_walker(Node *node, void *context)
Definition: nodeFuncs.c:1659

◆ fix_opfuncids_walker()

static bool fix_opfuncids_walker ( Node *  node,
void *  context 
)
static

Definition at line 1659 of file nodeFuncs.c.

References expression_tree_walker(), IsA, set_opfuncid(), and set_sa_opfuncid().

Referenced by fix_opfuncids().

1660 {
1661  if (node == NULL)
1662  return false;
1663  if (IsA(node, OpExpr))
1664  set_opfuncid((OpExpr *) node);
1665  else if (IsA(node, DistinctExpr))
1666  set_opfuncid((OpExpr *) node); /* rely on struct equivalence */
1667  else if (IsA(node, NullIfExpr))
1668  set_opfuncid((OpExpr *) node); /* rely on struct equivalence */
1669  else if (IsA(node, ScalarArrayOpExpr))
1670  set_sa_opfuncid((ScalarArrayOpExpr *) node);
1671  return expression_tree_walker(node, fix_opfuncids_walker, context);
1672 }
IsA
#define IsA(nodeptr, _type_)
Definition: nodes.h:590
fix_opfuncids_walker
static bool fix_opfuncids_walker(Node *node, void *context)
Definition: nodeFuncs.c:1659
expression_tree_walker
bool expression_tree_walker(Node *node, bool(*walker)(), void *context)
Definition: nodeFuncs.c:1904
set_opfuncid
void set_opfuncid(OpExpr *opexpr)
Definition: nodeFuncs.c:1683
set_sa_opfuncid
void set_sa_opfuncid(ScalarArrayOpExpr *opexpr)
Definition: nodeFuncs.c:1694

◆ leftmostLoc()

static int leftmostLoc ( int  loc1,
int  loc2 
)
static

Definition at line 1631 of file nodeFuncs.c.

References Min.

Referenced by exprLocation().

1632 {
1633  if (loc1 < 0)
1634  return loc2;
1635  else if (loc2 < 0)
1636  return loc1;
1637  else
1638  return Min(loc1, loc2);
1639 }
Min
#define Min(x, y)
Definition: c.h:986

◆ planstate_tree_walker()

bool planstate_tree_walker ( PlanState *  planstate,
bool(*)()  walker,
void *  context 
)

Definition at line 3993 of file nodeFuncs.c.

References check_stack_depth(), PlanState::initPlan, innerPlanState, lfirst, nodeTag, outerPlanState, PlanState::plan, planstate_walk_members(), planstate_walk_subplans(), PlanState::subPlan, T_Append, T_BitmapAnd, T_BitmapOr, T_CustomScan, T_MergeAppend, and T_SubqueryScan.

Referenced by ExecParallelEstimate(), ExecParallelInitializeDSM(), ExecParallelInitializeWorker(), ExecParallelReInitializeDSM(), ExecParallelReportInstrumentation(), ExecParallelRetrieveInstrumentation(), ExecShutdownNode(), ExplainPreScanNode(), and get_notclausearg().

3996 {
3997  Plan *plan = planstate->plan;
3998  ListCell *lc;
3999 
4000  /* Guard against stack overflow due to overly complex plan trees */
4001  check_stack_depth();
4002 
4003  /* initPlan-s */
4004  if (planstate_walk_subplans(planstate->initPlan, walker, context))
4005  return true;
4006 
4007  /* lefttree */
4008  if (outerPlanState(planstate))
4009  {
4010  if (walker(outerPlanState(planstate), context))
4011  return true;
4012  }
4013 
4014  /* righttree */
4015  if (innerPlanState(planstate))
4016  {
4017  if (walker(innerPlanState(planstate), context))
4018  return true;
4019  }
4020 
4021  /* special child plans */
4022  switch (nodeTag(plan))
4023  {
4024  case T_Append:
4025  if (planstate_walk_members(((AppendState *) planstate)->appendplans,
4026  ((AppendState *) planstate)->as_nplans,
4027  walker, context))
4028  return true;
4029  break;
4030  case T_MergeAppend:
4031  if (planstate_walk_members(((MergeAppendState *) planstate)->mergeplans,
4032  ((MergeAppendState *) planstate)->ms_nplans,
4033  walker, context))
4034  return true;
4035  break;
4036  case T_BitmapAnd:
4037  if (planstate_walk_members(((BitmapAndState *) planstate)->bitmapplans,
4038  ((BitmapAndState *) planstate)->nplans,
4039  walker, context))
4040  return true;
4041  break;
4042  case T_BitmapOr:
4043  if (planstate_walk_members(((BitmapOrState *) planstate)->bitmapplans,
4044  ((BitmapOrState *) planstate)->nplans,
4045  walker, context))
4046  return true;
4047  break;
4048  case T_SubqueryScan:
4049  if (walker(((SubqueryScanState *) planstate)->subplan, context))
4050  return true;
4051  break;
4052  case T_CustomScan:
4053  foreach(lc, ((CustomScanState *) planstate)->custom_ps)
4054  {
4055  if (walker((PlanState *) lfirst(lc), context))
4056  return true;
4057  }
4058  break;
4059  default:
4060  break;
4061  }
4062 
4063  /* subPlan-s */
4064  if (planstate_walk_subplans(planstate->subPlan, walker, context))
4065  return true;
4066 
4067  return false;
4068 }
PlanState::initPlan
List * initPlan
Definition: execnodes.h:989
planstate_walk_members
static bool planstate_walk_members(PlanState **planstates, int nplans, bool(*walker)(), void *context)
Definition: nodeFuncs.c:4096
T_Append
Definition: nodes.h:49
outerPlanState
#define outerPlanState(node)
Definition: execnodes.h:1058
check_stack_depth
void check_stack_depth(void)
Definition: postgres.c:3459
planstate_walk_subplans
static bool planstate_walk_subplans(List *plans, bool(*walker)(), void *context)
Definition: nodeFuncs.c:4074
PlanState::plan
Plan * plan
Definition: execnodes.h:964
lfirst
#define lfirst(lc)
Definition: pg_list.h:169
nodeTag
#define nodeTag(nodeptr)
Definition: nodes.h:544
innerPlanState
#define innerPlanState(node)
Definition: execnodes.h:1057

◆ planstate_walk_members()

static bool planstate_walk_members ( PlanState **  planstates,
int  nplans,
bool(*)()  walker,
void *  context 
)
static

Definition at line 4096 of file nodeFuncs.c.

Referenced by planstate_tree_walker().

4098 {
4099  int j;
4100 
4101  for (j = 0; j < nplans; j++)
4102  {
4103  if (walker(planstates[j], context))
4104  return true;
4105  }
4106 
4107  return false;
4108 }

◆ planstate_walk_subplans()

static bool planstate_walk_subplans ( List *  plans,
bool(*)()  walker,
void *  context 
)
static

Definition at line 4074 of file nodeFuncs.c.

References lfirst_node, and SubPlanState::planstate.

Referenced by planstate_tree_walker().

4077 {
4078  ListCell *lc;
4079 
4080  foreach(lc, plans)
4081  {
4082  SubPlanState *sps = lfirst_node(SubPlanState, lc);
4083 
4084  if (walker(sps->planstate, context))
4085  return true;
4086  }
4087 
4088  return false;
4089 }
SubPlanState::planstate
struct PlanState * planstate
Definition: execnodes.h:882
lfirst_node
#define lfirst_node(type, lc)
Definition: pg_list.h:172

◆ query_or_expression_tree_mutator()

Node* query_or_expression_tree_mutator ( Node *  node,
Node *(*)()  mutator,
void *  context,
int  flags 
)

Definition at line 3484 of file nodeFuncs.c.

References IsA, and query_tree_mutator().

Referenced by get_notclausearg(), map_variable_attnos(), and replace_rte_variables().

3488 {
3489  if (node && IsA(node, Query))
3490  return (Node *) query_tree_mutator((Query *) node,
3491  mutator,
3492  context,
3493  flags);
3494  else
3495  return mutator(node, context);
3496 }
IsA
#define IsA(nodeptr, _type_)
Definition: nodes.h:590
Node
Definition: nodes.h:539
query_tree_mutator
Query * query_tree_mutator(Query *query, Node *(*mutator)(), void *context, int flags)
Definition: nodeFuncs.c:3300

◆ query_or_expression_tree_walker()

bool query_or_expression_tree_walker ( Node *  node,
bool(*)()  walker,
void *  context,
int  flags 
)

Definition at line 3461 of file nodeFuncs.c.

References IsA, and query_tree_walker().

Referenced by checkExprHasSubLink(), contain_aggs_of_level(), contain_vars_of_level(), contain_windowfuncs(), get_notclausearg(), IncrementVarSublevelsUp(), locate_agg_of_level(), locate_var_of_level(), locate_windowfunc(), pull_varnos(), pull_varnos_of_level(), pull_vars_of_level(), rangeTableEntry_used(), and substitute_phv_relids().

3465 {
3466  if (node && IsA(node, Query))
3467  return query_tree_walker((Query *) node,
3468  walker,
3469  context,
3470  flags);
3471  else
3472  return walker(node, context);
3473 }
query_tree_walker
bool query_tree_walker(Query *query, bool(*walker)(), void *context, int flags)
Definition: nodeFuncs.c:2355
IsA
#define IsA(nodeptr, _type_)
Definition: nodes.h:590

◆ query_tree_mutator()

Query* query_tree_mutator ( Query *  query,
Node *(*)()  mutator,
void *  context,
int  flags 
)

Definition at line 3300 of file nodeFuncs.c.

References Assert, copyObject, Query::cteList, Query::distinctClause, WindowClause::endOffset, FLATCOPY, Query::groupClause, Query::havingQual, IsA, Query::jointree, lappend(), lfirst_node, Query::limitCount, Query::limitOffset, MUTATE, NIL, Query::onConflict, QTW_DONT_COPY_QUERY, QTW_EXAMINE_SORTGROUP, QTW_IGNORE_CTE_SUBQUERIES, range_table_mutator(), Query::returningList, Query::rtable, Query::setOperations, Query::sortClause, WindowClause::startOffset,