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nodeSubplan.h File Reference
#include "nodes/execnodes.h"
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Functions

SubPlanStateExecInitSubPlan (SubPlan *subplan, PlanState *parent)
 
Datum ExecSubPlan (SubPlanState *node, ExprContext *econtext, bool *isNull)
 
void ExecReScanSetParamPlan (SubPlanState *node, PlanState *parent)
 
void ExecSetParamPlan (SubPlanState *node, ExprContext *econtext)
 
void ExecSetParamPlanMulti (const Bitmapset *params, ExprContext *econtext)
 

Function Documentation

◆ ExecInitSubPlan()

SubPlanState* ExecInitSubPlan ( SubPlan subplan,
PlanState parent 
)

Definition at line 804 of file nodeSubplan.c.

805 {
807  EState *estate = parent->state;
808 
809  sstate->subplan = subplan;
810 
811  /* Link the SubPlanState to already-initialized subplan */
812  sstate->planstate = (PlanState *) list_nth(estate->es_subplanstates,
813  subplan->plan_id - 1);
814 
815  /*
816  * This check can fail if the planner mistakenly puts a parallel-unsafe
817  * subplan into a parallelized subquery; see ExecSerializePlan.
818  */
819  if (sstate->planstate == NULL)
820  elog(ERROR, "subplan \"%s\" was not initialized",
821  subplan->plan_name);
822 
823  /* Link to parent's state, too */
824  sstate->parent = parent;
825 
826  /* Initialize subexpressions */
827  sstate->testexpr = ExecInitExpr((Expr *) subplan->testexpr, parent);
828  sstate->args = ExecInitExprList(subplan->args, parent);
829 
830  /*
831  * initialize my state
832  */
833  sstate->curTuple = NULL;
834  sstate->curArray = PointerGetDatum(NULL);
835  sstate->projLeft = NULL;
836  sstate->projRight = NULL;
837  sstate->hashtable = NULL;
838  sstate->hashnulls = NULL;
839  sstate->hashtablecxt = NULL;
840  sstate->hashtempcxt = NULL;
841  sstate->innerecontext = NULL;
842  sstate->keyColIdx = NULL;
843  sstate->tab_eq_funcoids = NULL;
844  sstate->tab_hash_funcs = NULL;
845  sstate->tab_eq_funcs = NULL;
846  sstate->tab_collations = NULL;
847  sstate->lhs_hash_funcs = NULL;
848  sstate->cur_eq_funcs = NULL;
849 
850  /*
851  * If this is an initplan or MULTIEXPR subplan, it has output parameters
852  * that the parent plan will use, so mark those parameters as needing
853  * evaluation. We don't actually run the subplan until we first need one
854  * of its outputs.
855  *
856  * A CTE subplan's output parameter is never to be evaluated in the normal
857  * way, so skip this in that case.
858  *
859  * Note that we don't set parent->chgParam here: the parent plan hasn't
860  * been run yet, so no need to force it to re-run.
861  */
862  if (subplan->setParam != NIL && subplan->subLinkType != CTE_SUBLINK)
863  {
864  ListCell *lst;
865 
866  foreach(lst, subplan->setParam)
867  {
868  int paramid = lfirst_int(lst);
869  ParamExecData *prm = &(estate->es_param_exec_vals[paramid]);
870 
871  prm->execPlan = sstate;
872  }
873  }
874 
875  /*
876  * If we are going to hash the subquery output, initialize relevant stuff.
877  * (We don't create the hashtable until needed, though.)
878  */
879  if (subplan->useHashTable)
880  {
881  int ncols,
882  i;
883  TupleDesc tupDescLeft;
884  TupleDesc tupDescRight;
885  Oid *cross_eq_funcoids;
886  TupleTableSlot *slot;
887  List *oplist,
888  *lefttlist,
889  *righttlist;
890  ListCell *l;
891 
892  /* We need a memory context to hold the hash table(s) */
893  sstate->hashtablecxt =
895  "Subplan HashTable Context",
897  /* and a small one for the hash tables to use as temp storage */
898  sstate->hashtempcxt =
900  "Subplan HashTable Temp Context",
902  /* and a short-lived exprcontext for function evaluation */
903  sstate->innerecontext = CreateExprContext(estate);
904 
905  /*
906  * We use ExecProject to evaluate the lefthand and righthand
907  * expression lists and form tuples. (You might think that we could
908  * use the sub-select's output tuples directly, but that is not the
909  * case if we had to insert any run-time coercions of the sub-select's
910  * output datatypes; anyway this avoids storing any resjunk columns
911  * that might be in the sub-select's output.) Run through the
912  * combining expressions to build tlists for the lefthand and
913  * righthand sides.
914  *
915  * We also extract the combining operators themselves to initialize
916  * the equality and hashing functions for the hash tables.
917  */
918  if (IsA(subplan->testexpr, OpExpr))
919  {
920  /* single combining operator */
921  oplist = list_make1(subplan->testexpr);
922  }
923  else if (is_andclause(subplan->testexpr))
924  {
925  /* multiple combining operators */
926  oplist = castNode(BoolExpr, subplan->testexpr)->args;
927  }
928  else
929  {
930  /* shouldn't see anything else in a hashable subplan */
931  elog(ERROR, "unrecognized testexpr type: %d",
932  (int) nodeTag(subplan->testexpr));
933  oplist = NIL; /* keep compiler quiet */
934  }
935  ncols = list_length(oplist);
936 
937  lefttlist = righttlist = NIL;
938  sstate->numCols = ncols;
939  sstate->keyColIdx = (AttrNumber *) palloc(ncols * sizeof(AttrNumber));
940  sstate->tab_eq_funcoids = (Oid *) palloc(ncols * sizeof(Oid));
941  sstate->tab_collations = (Oid *) palloc(ncols * sizeof(Oid));
942  sstate->tab_hash_funcs = (FmgrInfo *) palloc(ncols * sizeof(FmgrInfo));
943  sstate->tab_eq_funcs = (FmgrInfo *) palloc(ncols * sizeof(FmgrInfo));
944  sstate->lhs_hash_funcs = (FmgrInfo *) palloc(ncols * sizeof(FmgrInfo));
945  sstate->cur_eq_funcs = (FmgrInfo *) palloc(ncols * sizeof(FmgrInfo));
946  /* we'll need the cross-type equality fns below, but not in sstate */
947  cross_eq_funcoids = (Oid *) palloc(ncols * sizeof(Oid));
948 
949  i = 1;
950  foreach(l, oplist)
951  {
952  OpExpr *opexpr = lfirst_node(OpExpr, l);
953  Expr *expr;
954  TargetEntry *tle;
955  Oid rhs_eq_oper;
956  Oid left_hashfn;
957  Oid right_hashfn;
958 
959  Assert(list_length(opexpr->args) == 2);
960 
961  /* Process lefthand argument */
962  expr = (Expr *) linitial(opexpr->args);
963  tle = makeTargetEntry(expr,
964  i,
965  NULL,
966  false);
967  lefttlist = lappend(lefttlist, tle);
968 
969  /* Process righthand argument */
970  expr = (Expr *) lsecond(opexpr->args);
971  tle = makeTargetEntry(expr,
972  i,
973  NULL,
974  false);
975  righttlist = lappend(righttlist, tle);
976 
977  /* Lookup the equality function (potentially cross-type) */
978  cross_eq_funcoids[i - 1] = opexpr->opfuncid;
979  fmgr_info(opexpr->opfuncid, &sstate->cur_eq_funcs[i - 1]);
980  fmgr_info_set_expr((Node *) opexpr, &sstate->cur_eq_funcs[i - 1]);
981 
982  /* Look up the equality function for the RHS type */
983  if (!get_compatible_hash_operators(opexpr->opno,
984  NULL, &rhs_eq_oper))
985  elog(ERROR, "could not find compatible hash operator for operator %u",
986  opexpr->opno);
987  sstate->tab_eq_funcoids[i - 1] = get_opcode(rhs_eq_oper);
988  fmgr_info(sstate->tab_eq_funcoids[i - 1],
989  &sstate->tab_eq_funcs[i - 1]);
990 
991  /* Lookup the associated hash functions */
992  if (!get_op_hash_functions(opexpr->opno,
993  &left_hashfn, &right_hashfn))
994  elog(ERROR, "could not find hash function for hash operator %u",
995  opexpr->opno);
996  fmgr_info(left_hashfn, &sstate->lhs_hash_funcs[i - 1]);
997  fmgr_info(right_hashfn, &sstate->tab_hash_funcs[i - 1]);
998 
999  /* Set collation */
1000  sstate->tab_collations[i - 1] = opexpr->inputcollid;
1001 
1002  /* keyColIdx is just column numbers 1..n */
1003  sstate->keyColIdx[i - 1] = i;
1004 
1005  i++;
1006  }
1007 
1008  /*
1009  * Construct tupdescs, slots and projection nodes for left and right
1010  * sides. The lefthand expressions will be evaluated in the parent
1011  * plan node's exprcontext, which we don't have access to here.
1012  * Fortunately we can just pass NULL for now and fill it in later
1013  * (hack alert!). The righthand expressions will be evaluated in our
1014  * own innerecontext.
1015  */
1016  tupDescLeft = ExecTypeFromTL(lefttlist);
1017  slot = ExecInitExtraTupleSlot(estate, tupDescLeft, &TTSOpsVirtual);
1018  sstate->projLeft = ExecBuildProjectionInfo(lefttlist,
1019  NULL,
1020  slot,
1021  parent,
1022  NULL);
1023 
1024  sstate->descRight = tupDescRight = ExecTypeFromTL(righttlist);
1025  slot = ExecInitExtraTupleSlot(estate, tupDescRight, &TTSOpsVirtual);
1026  sstate->projRight = ExecBuildProjectionInfo(righttlist,
1027  sstate->innerecontext,
1028  slot,
1029  sstate->planstate,
1030  NULL);
1031 
1032  /*
1033  * Create comparator for lookups of rows in the table (potentially
1034  * cross-type comparisons).
1035  */
1036  sstate->cur_eq_comp = ExecBuildGroupingEqual(tupDescLeft, tupDescRight,
1038  ncols,
1039  sstate->keyColIdx,
1040  cross_eq_funcoids,
1041  sstate->tab_collations,
1042  parent);
1043  }
1044 
1045  return sstate;
1046 }
int16 AttrNumber
Definition: attnum.h:21
#define ERROR
Definition: elog.h:35
List * ExecInitExprList(List *nodes, PlanState *parent)
Definition: execExpr.c:319
ExprState * ExecInitExpr(Expr *node, PlanState *parent)
Definition: execExpr.c:124
ProjectionInfo * ExecBuildProjectionInfo(List *targetList, ExprContext *econtext, TupleTableSlot *slot, PlanState *parent, TupleDesc inputDesc)
Definition: execExpr.c:354
ExprState * ExecBuildGroupingEqual(TupleDesc ldesc, TupleDesc rdesc, const TupleTableSlotOps *lops, const TupleTableSlotOps *rops, int numCols, const AttrNumber *keyColIdx, const Oid *eqfunctions, const Oid *collations, PlanState *parent)
Definition: execExpr.c:3719
const TupleTableSlotOps TTSOpsVirtual
Definition: execTuples.c:83
TupleTableSlot * ExecInitExtraTupleSlot(EState *estate, TupleDesc tupledesc, const TupleTableSlotOps *tts_ops)
Definition: execTuples.c:1831
const TupleTableSlotOps TTSOpsMinimalTuple
Definition: execTuples.c:85
TupleDesc ExecTypeFromTL(List *targetList)
Definition: execTuples.c:1938
ExprContext * CreateExprContext(EState *estate)
Definition: execUtils.c:305
void fmgr_info(Oid functionId, FmgrInfo *finfo)
Definition: fmgr.c:126
#define fmgr_info_set_expr(expr, finfo)
Definition: fmgr.h:135
int i
Definition: isn.c:73
Assert(fmt[strlen(fmt) - 1] !='\n')
List * lappend(List *list, void *datum)
Definition: list.c:338
bool get_compatible_hash_operators(Oid opno, Oid *lhs_opno, Oid *rhs_opno)
Definition: lsyscache.c:409
RegProcedure get_opcode(Oid opno)
Definition: lsyscache.c:1267
bool get_op_hash_functions(Oid opno, RegProcedure *lhs_procno, RegProcedure *rhs_procno)
Definition: lsyscache.c:509
TargetEntry * makeTargetEntry(Expr *expr, AttrNumber resno, char *resname, bool resjunk)
Definition: makefuncs.c:238
MemoryContext CurrentMemoryContext
Definition: mcxt.c:124
void * palloc(Size size)
Definition: mcxt.c:1199
#define AllocSetContextCreate
Definition: memutils.h:129
#define ALLOCSET_DEFAULT_SIZES
Definition: memutils.h:153
#define ALLOCSET_SMALL_SIZES
Definition: memutils.h:163
static bool is_andclause(const void *clause)
Definition: nodeFuncs.h:105
#define IsA(nodeptr, _type_)
Definition: nodes.h:168
#define nodeTag(nodeptr)
Definition: nodes.h:122
#define makeNode(_type_)
Definition: nodes.h:165
#define castNode(_type_, nodeptr)
Definition: nodes.h:186
#define lfirst_node(type, lc)
Definition: pg_list.h:174
static int list_length(const List *l)
Definition: pg_list.h:150
#define NIL
Definition: pg_list.h:66
#define lfirst_int(lc)
Definition: pg_list.h:171
#define list_make1(x1)
Definition: pg_list.h:210
#define linitial(l)
Definition: pg_list.h:176
#define lsecond(l)
Definition: pg_list.h:181
static void * list_nth(const List *list, int n)
Definition: pg_list.h:297
static Datum PointerGetDatum(const void *X)
Definition: postgres.h:670
unsigned int Oid
Definition: postgres_ext.h:31
@ CTE_SUBLINK
Definition: primnodes.h:831
ParamExecData * es_param_exec_vals
Definition: execnodes.h:651
List * es_subplanstates
Definition: execnodes.h:668
Definition: fmgr.h:57
Definition: pg_list.h:52
Definition: nodes.h:118
Oid opno
Definition: primnodes.h:648
List * args
Definition: primnodes.h:666
Oid inputcollid
Definition: primnodes.h:663
void * execPlan
Definition: params.h:148
EState * state
Definition: execnodes.h:1032
TupleHashTable hashtable
Definition: execnodes.h:956
ExprState * cur_eq_comp
Definition: execnodes.h:973
FmgrInfo * tab_eq_funcs
Definition: execnodes.h:970
MemoryContext hashtablecxt
Definition: execnodes.h:960
Oid * tab_eq_funcoids
Definition: execnodes.h:966
ExprContext * innerecontext
Definition: execnodes.h:962
FmgrInfo * tab_hash_funcs
Definition: execnodes.h:969
FmgrInfo * cur_eq_funcs
Definition: execnodes.h:972
List * args
Definition: execnodes.h:949
MemoryContext hashtempcxt
Definition: execnodes.h:961
HeapTuple curTuple
Definition: execnodes.h:950
FmgrInfo * lhs_hash_funcs
Definition: execnodes.h:971
AttrNumber * keyColIdx
Definition: execnodes.h:965
struct PlanState * planstate
Definition: execnodes.h:946
TupleDesc descRight
Definition: execnodes.h:953
SubPlan * subplan
Definition: execnodes.h:945
ProjectionInfo * projLeft
Definition: execnodes.h:954
ProjectionInfo * projRight
Definition: execnodes.h:955
ExprState * testexpr
Definition: execnodes.h:948
struct PlanState * parent
Definition: execnodes.h:947
Oid * tab_collations
Definition: execnodes.h:968
TupleHashTable hashnulls
Definition: execnodes.h:957
Datum curArray
Definition: execnodes.h:951
int plan_id
Definition: primnodes.h:893
char * plan_name
Definition: primnodes.h:895
List * args
Definition: primnodes.h:914
bool useHashTable
Definition: primnodes.h:902
Node * testexpr
Definition: primnodes.h:890
List * setParam
Definition: primnodes.h:911
SubLinkType subLinkType
Definition: primnodes.h:888

References ALLOCSET_DEFAULT_SIZES, ALLOCSET_SMALL_SIZES, AllocSetContextCreate, SubPlanState::args, OpExpr::args, SubPlan::args, Assert(), castNode, CreateExprContext(), CTE_SUBLINK, SubPlanState::cur_eq_comp, SubPlanState::cur_eq_funcs, SubPlanState::curArray, CurrentMemoryContext, SubPlanState::curTuple, SubPlanState::descRight, elog(), ERROR, EState::es_param_exec_vals, EState::es_subplanstates, ExecBuildGroupingEqual(), ExecBuildProjectionInfo(), ExecInitExpr(), ExecInitExprList(), ExecInitExtraTupleSlot(), ParamExecData::execPlan, ExecTypeFromTL(), fmgr_info(), fmgr_info_set_expr, get_compatible_hash_operators(), get_op_hash_functions(), get_opcode(), SubPlanState::hashnulls, SubPlanState::hashtable, SubPlanState::hashtablecxt, SubPlanState::hashtempcxt, i, SubPlanState::innerecontext, OpExpr::inputcollid, is_andclause(), IsA, SubPlanState::keyColIdx, lappend(), lfirst_int, lfirst_node, SubPlanState::lhs_hash_funcs, linitial, list_length(), list_make1, list_nth(), lsecond, makeNode, makeTargetEntry(), NIL, nodeTag, SubPlanState::numCols, OpExpr::opno, palloc(), SubPlanState::parent, SubPlan::plan_id, SubPlan::plan_name, SubPlanState::planstate, PointerGetDatum(), SubPlanState::projLeft, SubPlanState::projRight, SubPlan::setParam, PlanState::state, SubPlan::subLinkType, SubPlanState::subplan, SubPlanState::tab_collations, SubPlanState::tab_eq_funcoids, SubPlanState::tab_eq_funcs, SubPlanState::tab_hash_funcs, SubPlanState::testexpr, SubPlan::testexpr, TTSOpsMinimalTuple, TTSOpsVirtual, and SubPlan::useHashTable.

Referenced by ExecInitExprRec(), and ExecInitNode().

◆ ExecReScanSetParamPlan()

void ExecReScanSetParamPlan ( SubPlanState node,
PlanState parent 
)

Definition at line 1291 of file nodeSubplan.c.

1292 {
1293  PlanState *planstate = node->planstate;
1294  SubPlan *subplan = node->subplan;
1295  EState *estate = parent->state;
1296  ListCell *l;
1297 
1298  /* sanity checks */
1299  if (subplan->parParam != NIL)
1300  elog(ERROR, "direct correlated subquery unsupported as initplan");
1301  if (subplan->setParam == NIL)
1302  elog(ERROR, "setParam list of initplan is empty");
1303  if (bms_is_empty(planstate->plan->extParam))
1304  elog(ERROR, "extParam set of initplan is empty");
1305 
1306  /*
1307  * Don't actually re-scan: it'll happen inside ExecSetParamPlan if needed.
1308  */
1309 
1310  /*
1311  * Mark this subplan's output parameters as needing recalculation.
1312  *
1313  * CTE subplans are never executed via parameter recalculation; instead
1314  * they get run when called by nodeCtescan.c. So don't mark the output
1315  * parameter of a CTE subplan as dirty, but do set the chgParam bit for it
1316  * so that dependent plan nodes will get told to rescan.
1317  */
1318  foreach(l, subplan->setParam)
1319  {
1320  int paramid = lfirst_int(l);
1321  ParamExecData *prm = &(estate->es_param_exec_vals[paramid]);
1322 
1323  if (subplan->subLinkType != CTE_SUBLINK)
1324  prm->execPlan = node;
1325 
1326  parent->chgParam = bms_add_member(parent->chgParam, paramid);
1327  }
1328 }
Bitmapset * bms_add_member(Bitmapset *a, int x)
Definition: bitmapset.c:739
bool bms_is_empty(const Bitmapset *a)
Definition: bitmapset.c:704
Plan * plan
Definition: execnodes.h:1030
Bitmapset * chgParam
Definition: execnodes.h:1062
Bitmapset * extParam
Definition: plannodes.h:174
List * parParam
Definition: primnodes.h:913

References bms_add_member(), bms_is_empty(), PlanState::chgParam, CTE_SUBLINK, elog(), ERROR, EState::es_param_exec_vals, ParamExecData::execPlan, Plan::extParam, lfirst_int, NIL, SubPlan::parParam, PlanState::plan, SubPlanState::planstate, SubPlan::setParam, PlanState::state, SubPlan::subLinkType, and SubPlanState::subplan.

Referenced by ExecReScan().

◆ ExecSetParamPlan()

void ExecSetParamPlan ( SubPlanState node,
ExprContext econtext 
)

Definition at line 1073 of file nodeSubplan.c.

1074 {
1075  SubPlan *subplan = node->subplan;
1076  PlanState *planstate = node->planstate;
1077  SubLinkType subLinkType = subplan->subLinkType;
1078  EState *estate = planstate->state;
1079  ScanDirection dir = estate->es_direction;
1080  MemoryContext oldcontext;
1081  TupleTableSlot *slot;
1082  ListCell *pvar;
1083  ListCell *l;
1084  bool found = false;
1085  ArrayBuildStateAny *astate = NULL;
1086 
1087  if (subLinkType == ANY_SUBLINK ||
1088  subLinkType == ALL_SUBLINK)
1089  elog(ERROR, "ANY/ALL subselect unsupported as initplan");
1090  if (subLinkType == CTE_SUBLINK)
1091  elog(ERROR, "CTE subplans should not be executed via ExecSetParamPlan");
1092 
1093  /*
1094  * Enforce forward scan direction regardless of caller. It's hard but not
1095  * impossible to get here in backward scan, so make it work anyway.
1096  */
1098 
1099  /* Initialize ArrayBuildStateAny in caller's context, if needed */
1100  if (subLinkType == ARRAY_SUBLINK)
1101  astate = initArrayResultAny(subplan->firstColType,
1102  CurrentMemoryContext, true);
1103 
1104  /*
1105  * Must switch to per-query memory context.
1106  */
1107  oldcontext = MemoryContextSwitchTo(econtext->ecxt_per_query_memory);
1108 
1109  /*
1110  * Set Params of this plan from parent plan correlation values. (Any
1111  * calculation we have to do is done in the parent econtext, since the
1112  * Param values don't need to have per-query lifetime.) Currently, we
1113  * expect only MULTIEXPR_SUBLINK plans to have any correlation values.
1114  */
1115  Assert(subplan->parParam == NIL || subLinkType == MULTIEXPR_SUBLINK);
1116  Assert(list_length(subplan->parParam) == list_length(node->args));
1117 
1118  forboth(l, subplan->parParam, pvar, node->args)
1119  {
1120  int paramid = lfirst_int(l);
1121  ParamExecData *prm = &(econtext->ecxt_param_exec_vals[paramid]);
1122 
1124  econtext,
1125  &(prm->isnull));
1126  planstate->chgParam = bms_add_member(planstate->chgParam, paramid);
1127  }
1128 
1129  /*
1130  * Run the plan. (If it needs to be rescanned, the first ExecProcNode
1131  * call will take care of that.)
1132  */
1133  for (slot = ExecProcNode(planstate);
1134  !TupIsNull(slot);
1135  slot = ExecProcNode(planstate))
1136  {
1137  TupleDesc tdesc = slot->tts_tupleDescriptor;
1138  int i = 1;
1139 
1140  if (subLinkType == EXISTS_SUBLINK)
1141  {
1142  /* There can be only one setParam... */
1143  int paramid = linitial_int(subplan->setParam);
1144  ParamExecData *prm = &(econtext->ecxt_param_exec_vals[paramid]);
1145 
1146  prm->execPlan = NULL;
1147  prm->value = BoolGetDatum(true);
1148  prm->isnull = false;
1149  found = true;
1150  break;
1151  }
1152 
1153  if (subLinkType == ARRAY_SUBLINK)
1154  {
1155  Datum dvalue;
1156  bool disnull;
1157 
1158  found = true;
1159  /* stash away current value */
1160  Assert(subplan->firstColType == TupleDescAttr(tdesc, 0)->atttypid);
1161  dvalue = slot_getattr(slot, 1, &disnull);
1162  astate = accumArrayResultAny(astate, dvalue, disnull,
1163  subplan->firstColType, oldcontext);
1164  /* keep scanning subplan to collect all values */
1165  continue;
1166  }
1167 
1168  if (found &&
1169  (subLinkType == EXPR_SUBLINK ||
1170  subLinkType == MULTIEXPR_SUBLINK ||
1171  subLinkType == ROWCOMPARE_SUBLINK))
1172  ereport(ERROR,
1173  (errcode(ERRCODE_CARDINALITY_VIOLATION),
1174  errmsg("more than one row returned by a subquery used as an expression")));
1175 
1176  found = true;
1177 
1178  /*
1179  * We need to copy the subplan's tuple into our own context, in case
1180  * any of the params are pass-by-ref type --- the pointers stored in
1181  * the param structs will point at this copied tuple! node->curTuple
1182  * keeps track of the copied tuple for eventual freeing.
1183  */
1184  if (node->curTuple)
1185  heap_freetuple(node->curTuple);
1186  node->curTuple = ExecCopySlotHeapTuple(slot);
1187 
1188  /*
1189  * Now set all the setParam params from the columns of the tuple
1190  */
1191  foreach(l, subplan->setParam)
1192  {
1193  int paramid = lfirst_int(l);
1194  ParamExecData *prm = &(econtext->ecxt_param_exec_vals[paramid]);
1195 
1196  prm->execPlan = NULL;
1197  prm->value = heap_getattr(node->curTuple, i, tdesc,
1198  &(prm->isnull));
1199  i++;
1200  }
1201  }
1202 
1203  if (subLinkType == ARRAY_SUBLINK)
1204  {
1205  /* There can be only one setParam... */
1206  int paramid = linitial_int(subplan->setParam);
1207  ParamExecData *prm = &(econtext->ecxt_param_exec_vals[paramid]);
1208 
1209  /*
1210  * We build the result array in query context so it won't disappear;
1211  * to avoid leaking memory across repeated calls, we have to remember
1212  * the latest value, much as for curTuple above.
1213  */
1214  if (node->curArray != PointerGetDatum(NULL))
1215  pfree(DatumGetPointer(node->curArray));
1216  node->curArray = makeArrayResultAny(astate,
1217  econtext->ecxt_per_query_memory,
1218  true);
1219  prm->execPlan = NULL;
1220  prm->value = node->curArray;
1221  prm->isnull = false;
1222  }
1223  else if (!found)
1224  {
1225  if (subLinkType == EXISTS_SUBLINK)
1226  {
1227  /* There can be only one setParam... */
1228  int paramid = linitial_int(subplan->setParam);
1229  ParamExecData *prm = &(econtext->ecxt_param_exec_vals[paramid]);
1230 
1231  prm->execPlan = NULL;
1232  prm->value = BoolGetDatum(false);
1233  prm->isnull = false;
1234  }
1235  else
1236  {
1237  /* For other sublink types, set all the output params to NULL */
1238  foreach(l, subplan->setParam)
1239  {
1240  int paramid = lfirst_int(l);
1241  ParamExecData *prm = &(econtext->ecxt_param_exec_vals[paramid]);
1242 
1243  prm->execPlan = NULL;
1244  prm->value = (Datum) 0;
1245  prm->isnull = true;
1246  }
1247  }
1248  }
1249 
1250  MemoryContextSwitchTo(oldcontext);
1251 
1252  /* restore scan direction */
1253  estate->es_direction = dir;
1254 }
ArrayBuildStateAny * initArrayResultAny(Oid input_type, MemoryContext rcontext, bool subcontext)
Definition: arrayfuncs.c:5703
ArrayBuildStateAny * accumArrayResultAny(ArrayBuildStateAny *astate, Datum dvalue, bool disnull, Oid input_type, MemoryContext rcontext)
Definition: arrayfuncs.c:5748
Datum makeArrayResultAny(ArrayBuildStateAny *astate, MemoryContext rcontext, bool release)
Definition: arrayfuncs.c:5776
int errcode(int sqlerrcode)
Definition: elog.c:735
int errmsg(const char *fmt,...)
Definition: elog.c:946
#define ereport(elevel,...)
Definition: elog.h:145
static Datum ExecEvalExprSwitchContext(ExprState *state, ExprContext *econtext, bool *isNull)
Definition: executor.h:336
static TupleTableSlot * ExecProcNode(PlanState *node)
Definition: executor.h:257
void heap_freetuple(HeapTuple htup)
Definition: heaptuple.c:1338
static Datum heap_getattr(HeapTuple tup, int attnum, TupleDesc tupleDesc, bool *isnull)
Definition: htup_details.h:788
void pfree(void *pointer)
Definition: mcxt.c:1306
static MemoryContext MemoryContextSwitchTo(MemoryContext context)
Definition: palloc.h:135
#define lfirst(lc)
Definition: pg_list.h:170
#define forboth(cell1, list1, cell2, list2)
Definition: pg_list.h:465
#define linitial_int(l)
Definition: pg_list.h:177
uintptr_t Datum
Definition: postgres.h:412
static Datum BoolGetDatum(bool X)
Definition: postgres.h:450
static Pointer DatumGetPointer(Datum X)
Definition: postgres.h:660
SubLinkType
Definition: primnodes.h:823
@ ARRAY_SUBLINK
Definition: primnodes.h:830
@ ANY_SUBLINK
Definition: primnodes.h:826
@ MULTIEXPR_SUBLINK
Definition: primnodes.h:829
@ EXPR_SUBLINK
Definition: primnodes.h:828
@ ROWCOMPARE_SUBLINK
Definition: primnodes.h:827
@ ALL_SUBLINK
Definition: primnodes.h:825
@ EXISTS_SUBLINK
Definition: primnodes.h:824
ScanDirection
Definition: sdir.h:23
@ ForwardScanDirection
Definition: sdir.h:26
ScanDirection es_direction
Definition: execnodes.h:611
ParamExecData * ecxt_param_exec_vals
Definition: execnodes.h:258
MemoryContext ecxt_per_query_memory
Definition: execnodes.h:254
bool isnull
Definition: params.h:150
Datum value
Definition: params.h:149
Oid firstColType
Definition: primnodes.h:897
TupleDesc tts_tupleDescriptor
Definition: tuptable.h:124
#define TupleDescAttr(tupdesc, i)
Definition: tupdesc.h:92
static HeapTuple ExecCopySlotHeapTuple(TupleTableSlot *slot)
Definition: tuptable.h:460
static Datum slot_getattr(TupleTableSlot *slot, int attnum, bool *isnull)
Definition: tuptable.h:389
#define TupIsNull(slot)
Definition: tuptable.h:300

References accumArrayResultAny(), ALL_SUBLINK, ANY_SUBLINK, SubPlanState::args, ARRAY_SUBLINK, Assert(), bms_add_member(), BoolGetDatum(), PlanState::chgParam, CTE_SUBLINK, SubPlanState::curArray, CurrentMemoryContext, SubPlanState::curTuple, DatumGetPointer(), ExprContext::ecxt_param_exec_vals, ExprContext::ecxt_per_query_memory, elog(), ereport, errcode(), errmsg(), ERROR, EState::es_direction, ExecCopySlotHeapTuple(), ExecEvalExprSwitchContext(), ParamExecData::execPlan, ExecProcNode(), EXISTS_SUBLINK, EXPR_SUBLINK, SubPlan::firstColType, forboth, ForwardScanDirection, heap_freetuple(), heap_getattr(), i, initArrayResultAny(), ParamExecData::isnull, lfirst, lfirst_int, linitial_int, list_length(), makeArrayResultAny(), MemoryContextSwitchTo(), MULTIEXPR_SUBLINK, NIL, SubPlan::parParam, pfree(), SubPlanState::planstate, PointerGetDatum(), ROWCOMPARE_SUBLINK, SubPlan::setParam, slot_getattr(), PlanState::state, SubPlan::subLinkType, SubPlanState::subplan, TupleTableSlot::tts_tupleDescriptor, TupIsNull, TupleDescAttr, and ParamExecData::value.

Referenced by ExecEvalParamExec(), and ExecSetParamPlanMulti().

◆ ExecSetParamPlanMulti()

void ExecSetParamPlanMulti ( const Bitmapset params,
ExprContext econtext 
)

Definition at line 1268 of file nodeSubplan.c.

1269 {
1270  int paramid;
1271 
1272  paramid = -1;
1273  while ((paramid = bms_next_member(params, paramid)) >= 0)
1274  {
1275  ParamExecData *prm = &(econtext->ecxt_param_exec_vals[paramid]);
1276 
1277  if (prm->execPlan != NULL)
1278  {
1279  /* Parameter not evaluated yet, so go do it */
1280  ExecSetParamPlan(prm->execPlan, econtext);
1281  /* ExecSetParamPlan should have processed this param... */
1282  Assert(prm->execPlan == NULL);
1283  }
1284  }
1285 }
int bms_next_member(const Bitmapset *a, int prevbit)
Definition: bitmapset.c:1047
void ExecSetParamPlan(SubPlanState *node, ExprContext *econtext)
Definition: nodeSubplan.c:1073

References Assert(), bms_next_member(), ExprContext::ecxt_param_exec_vals, ParamExecData::execPlan, and ExecSetParamPlan().

Referenced by EvalPlanQualBegin(), EvalPlanQualStart(), ExecInitParallelPlan(), and ExecParallelReinitialize().

◆ ExecSubPlan()

Datum ExecSubPlan ( SubPlanState node,
ExprContext econtext,
bool isNull 
)

Definition at line 62 of file nodeSubplan.c.

65 {
66  SubPlan *subplan = node->subplan;
67  EState *estate = node->planstate->state;
68  ScanDirection dir = estate->es_direction;
69  Datum retval;
70 
72 
73  /* Set non-null as default */
74  *isNull = false;
75 
76  /* Sanity checks */
77  if (subplan->subLinkType == CTE_SUBLINK)
78  elog(ERROR, "CTE subplans should not be executed via ExecSubPlan");
79  if (subplan->setParam != NIL && subplan->subLinkType != MULTIEXPR_SUBLINK)
80  elog(ERROR, "cannot set parent params from subquery");
81 
82  /* Force forward-scan mode for evaluation */
84 
85  /* Select appropriate evaluation strategy */
86  if (subplan->useHashTable)
87  retval = ExecHashSubPlan(node, econtext, isNull);
88  else
89  retval = ExecScanSubPlan(node, econtext, isNull);
90 
91  /* restore scan direction */
92  estate->es_direction = dir;
93 
94  return retval;
95 }
#define CHECK_FOR_INTERRUPTS()
Definition: miscadmin.h:121
static Datum ExecHashSubPlan(SubPlanState *node, ExprContext *econtext, bool *isNull)
Definition: nodeSubplan.c:101
static Datum ExecScanSubPlan(SubPlanState *node, ExprContext *econtext, bool *isNull)
Definition: nodeSubplan.c:223

References CHECK_FOR_INTERRUPTS, CTE_SUBLINK, elog(), ERROR, EState::es_direction, ExecHashSubPlan(), ExecScanSubPlan(), ForwardScanDirection, MULTIEXPR_SUBLINK, NIL, SubPlanState::planstate, SubPlan::setParam, PlanState::state, SubPlan::subLinkType, SubPlanState::subplan, and SubPlan::useHashTable.

Referenced by ExecEvalSubPlan().