execUtils.c File Reference

#include "postgres.h"
#include "access/parallel.h"
#include "access/relscan.h"
#include "access/table.h"
#include "access/tableam.h"
#include "access/transam.h"
#include "executor/executor.h"
#include "jit/jit.h"
#include "mb/pg_wchar.h"
#include "nodes/nodeFuncs.h"
#include "parser/parsetree.h"
#include "partitioning/partdesc.h"
#include "storage/lmgr.h"
#include "utils/builtins.h"
#include "utils/memutils.h"
#include "utils/rel.h"
#include "utils/typcache.h"

Include dependency graph for execUtils.c:

Go to the source code of this file.

Functions
static bool	tlist_matches_tupdesc (PlanState *ps, List *tlist, Index varno, TupleDesc tupdesc)
static void	ShutdownExprContext (ExprContext *econtext, bool isCommit)
EState *	CreateExecutorState (void)
void	FreeExecutorState (EState *estate)
ExprContext *	CreateExprContext (EState *estate)
ExprContext *	CreateStandaloneExprContext (void)
void	FreeExprContext (ExprContext *econtext, bool isCommit)
void	ReScanExprContext (ExprContext *econtext)
ExprContext *	MakePerTupleExprContext (EState *estate)
void	ExecAssignExprContext (EState *estate, PlanState *planstate)
TupleDesc	ExecGetResultType (PlanState *planstate)
const TupleTableSlotOps *	ExecGetResultSlotOps (PlanState *planstate, bool *isfixed)
void	ExecAssignProjectionInfo (PlanState *planstate, TupleDesc inputDesc)
void	ExecConditionalAssignProjectionInfo (PlanState *planstate, TupleDesc inputDesc, Index varno)
void	ExecFreeExprContext (PlanState *planstate)
void	ExecAssignScanType (ScanState *scanstate, TupleDesc tupDesc)
void	ExecCreateScanSlotFromOuterPlan (EState *estate, ScanState *scanstate, const TupleTableSlotOps *tts_ops)
bool	ExecRelationIsTargetRelation (EState *estate, Index scanrelid)
Relation	ExecOpenScanRelation (EState *estate, Index scanrelid, int eflags)
void	ExecInitRangeTable (EState *estate, List *rangeTable)
Relation	ExecGetRangeTableRelation (EState *estate, Index rti)
void	UpdateChangedParamSet (PlanState *node, Bitmapset *newchg)
int	executor_errposition (EState *estate, int location)
void	RegisterExprContextCallback (ExprContext *econtext, ExprContextCallbackFunction function, Datum arg)
void	UnregisterExprContextCallback (ExprContext *econtext, ExprContextCallbackFunction function, Datum arg)
Datum	GetAttributeByName (HeapTupleHeader tuple, const char *attname, bool *isNull)
Datum	GetAttributeByNum (HeapTupleHeader tuple, AttrNumber attrno, bool *isNull)
int	ExecTargetListLength (List *targetlist)
int	ExecCleanTargetListLength (List *targetlist)
TupleTableSlot *	ExecGetTriggerOldSlot (EState *estate, ResultRelInfo *relInfo)
TupleTableSlot *	ExecGetTriggerNewSlot (EState *estate, ResultRelInfo *relInfo)
TupleTableSlot *	ExecGetReturningSlot (EState *estate, ResultRelInfo *relInfo)

Function Documentation

CreateExecutorState()

EState* CreateExecutorState

(

void

)

Definition at line 88 of file execUtils.c.

References ALLOCSET_DEFAULT_SIZES, AllocSetContextCreate, CurrentMemoryContext, EState::es_auxmodifytables, EState::es_crosscheck_snapshot, EState::es_direction, EState::es_exprcontexts, EState::es_finished, EState::es_instrument, EState::es_jit, EState::es_jit_flags, EState::es_junkFilter, EState::es_num_result_relations, EState::es_num_root_result_relations, EState::es_output_cid, EState::es_param_exec_vals, EState::es_param_list_info, EState::es_per_tuple_exprcontext, EState::es_plannedstmt, EState::es_processed, EState::es_query_cxt, EState::es_queryEnv, EState::es_range_table, EState::es_range_table_size, EState::es_relations, EState::es_result_relation_info, EState::es_result_relations, EState::es_root_result_relations, EState::es_rowmarks, EState::es_snapshot, EState::es_sourceText, EState::es_subplanstates, EState::es_top_eflags, EState::es_trig_target_relations, EState::es_tuple_routing_result_relations, EState::es_tupleTable, EState::es_use_parallel_mode, ForwardScanDirection, InvalidSnapshot, makeNode, MemoryContextSwitchTo(), and NIL.

Referenced by afterTriggerInvokeEvents(), ATRewriteTable(), check_default_partition_contents(), compute_index_stats(), CopyFrom(), create_estate_for_relation(), EvalPlanQualStart(), evaluate_expr(), ExecuteCallStmt(), ExecuteQuery(), ExecuteTruncateGuts(), ExplainExecuteQuery(), get_qual_for_range(), heapam_index_build_range_scan(), heapam_index_validate_scan(), IndexCheckExclusion(), operator_predicate_proof(), plpgsql_create_econtext(), plpgsql_inline_handler(), standard_ExecutorStart(), StoreAttrDefault(), tuplesort_begin_cluster(), unique_key_recheck(), validateCheckConstraint(), and validateDomainConstraint().

{
    EState     *estate;
    MemoryContext qcontext;
    MemoryContext oldcontext;

    /*
     * Create the per-query context for this Executor run.
     */
    qcontext = AllocSetContextCreate(CurrentMemoryContext,
                                     "ExecutorState",
                                     ALLOCSET_DEFAULT_SIZES);

    /*
     * Make the EState node within the per-query context.  This way, we don't
     * need a separate pfree() operation for it at shutdown.
     */
    oldcontext = MemoryContextSwitchTo(qcontext);

    estate = makeNode(EState);

    /*
     * Initialize all fields of the Executor State structure
     */
    estate->es_direction = ForwardScanDirection;
    estate->es_snapshot = InvalidSnapshot;  /* caller must initialize this */
    estate->es_crosscheck_snapshot = InvalidSnapshot;   /* no crosscheck */
    estate->es_range_table = NIL;
    estate->es_range_table_size = 0;
    estate->es_relations = NULL;
    estate->es_rowmarks = NULL;
    estate->es_plannedstmt = NULL;

    estate->es_junkFilter = NULL;

    estate->es_output_cid = (CommandId) 0;

    estate->es_result_relations = NULL;
    estate->es_num_result_relations = 0;
    estate->es_result_relation_info = NULL;

    estate->es_root_result_relations = NULL;
    estate->es_num_root_result_relations = 0;

    estate->es_tuple_routing_result_relations = NIL;

    estate->es_trig_target_relations = NIL;

    estate->es_param_list_info = NULL;
    estate->es_param_exec_vals = NULL;

    estate->es_queryEnv = NULL;

    estate->es_query_cxt = qcontext;

    estate->es_tupleTable = NIL;

    estate->es_processed = 0;

    estate->es_top_eflags = 0;
    estate->es_instrument = 0;
    estate->es_finished = false;

    estate->es_exprcontexts = NIL;

    estate->es_subplanstates = NIL;

    estate->es_auxmodifytables = NIL;

    estate->es_per_tuple_exprcontext = NULL;

    estate->es_sourceText = NULL;

    estate->es_use_parallel_mode = false;

    estate->es_jit_flags = 0;
    estate->es_jit = NULL;

    /*
     * Return the executor state structure
     */
    MemoryContextSwitchTo(oldcontext);

    return estate;
}

CreateExprContext()

ExprContext* CreateExprContext

(

EState *

estate

)

Definition at line 244 of file execUtils.c.

References ALLOCSET_DEFAULT_SIZES, AllocSetContextCreate, ExprContext::caseValue_datum, ExprContext::caseValue_isNull, ExprContext::domainValue_datum, ExprContext::domainValue_isNull, ExprContext::ecxt_aggnulls, ExprContext::ecxt_aggvalues, ExprContext::ecxt_callbacks, ExprContext::ecxt_estate, ExprContext::ecxt_innertuple, ExprContext::ecxt_outertuple, ExprContext::ecxt_param_exec_vals, ExprContext::ecxt_param_list_info, ExprContext::ecxt_per_query_memory, ExprContext::ecxt_per_tuple_memory, ExprContext::ecxt_scantuple, EState::es_exprcontexts, EState::es_param_exec_vals, EState::es_param_list_info, EState::es_query_cxt, lcons(), makeNode, and MemoryContextSwitchTo().

Referenced by ExecAssignExprContext(), ExecInitMergeJoin(), ExecInitSubPlan(), ExecuteCallStmt(), MakePerTupleExprContext(), and plpgsql_create_econtext().

{
    ExprContext *econtext;
    MemoryContext oldcontext;

    /* Create the ExprContext node within the per-query memory context */
    oldcontext = MemoryContextSwitchTo(estate->es_query_cxt);

    econtext = makeNode(ExprContext);

    /* Initialize fields of ExprContext */
    econtext->ecxt_scantuple = NULL;
    econtext->ecxt_innertuple = NULL;
    econtext->ecxt_outertuple = NULL;

    econtext->ecxt_per_query_memory = estate->es_query_cxt;

    /*
     * Create working memory for expression evaluation in this context.
     */
    econtext->ecxt_per_tuple_memory =
        AllocSetContextCreate(estate->es_query_cxt,
                              "ExprContext",
                              ALLOCSET_DEFAULT_SIZES);

    econtext->ecxt_param_exec_vals = estate->es_param_exec_vals;
    econtext->ecxt_param_list_info = estate->es_param_list_info;

    econtext->ecxt_aggvalues = NULL;
    econtext->ecxt_aggnulls = NULL;

    econtext->caseValue_datum = (Datum) 0;
    econtext->caseValue_isNull = true;

    econtext->domainValue_datum = (Datum) 0;
    econtext->domainValue_isNull = true;

    econtext->ecxt_estate = estate;

    econtext->ecxt_callbacks = NULL;

    /*
     * Link the ExprContext into the EState to ensure it is shut down when the
     * EState is freed.  Because we use lcons(), shutdowns will occur in
     * reverse order of creation, which may not be essential but can't hurt.
     */
    estate->es_exprcontexts = lcons(econtext, estate->es_exprcontexts);

    MemoryContextSwitchTo(oldcontext);

    return econtext;
}

CreateStandaloneExprContext()

ExprContext* CreateStandaloneExprContext

(

void

)

Definition at line 316 of file execUtils.c.

References ALLOCSET_DEFAULT_SIZES, AllocSetContextCreate, ExprContext::caseValue_datum, ExprContext::caseValue_isNull, CurrentMemoryContext, ExprContext::domainValue_datum, ExprContext::domainValue_isNull, ExprContext::ecxt_aggnulls, ExprContext::ecxt_aggvalues, ExprContext::ecxt_callbacks, ExprContext::ecxt_estate, ExprContext::ecxt_innertuple, ExprContext::ecxt_outertuple, ExprContext::ecxt_param_exec_vals, ExprContext::ecxt_param_list_info, ExprContext::ecxt_per_query_memory, ExprContext::ecxt_per_tuple_memory, ExprContext::ecxt_scantuple, and makeNode.

Referenced by BuildTupleHashTableExt(), domain_check_input(), and hypothetical_dense_rank_final().

{
    ExprContext *econtext;

    /* Create the ExprContext node within the caller's memory context */
    econtext = makeNode(ExprContext);

    /* Initialize fields of ExprContext */
    econtext->ecxt_scantuple = NULL;
    econtext->ecxt_innertuple = NULL;
    econtext->ecxt_outertuple = NULL;

    econtext->ecxt_per_query_memory = CurrentMemoryContext;

    /*
     * Create working memory for expression evaluation in this context.
     */
    econtext->ecxt_per_tuple_memory =
        AllocSetContextCreate(CurrentMemoryContext,
                              "ExprContext",
                              ALLOCSET_DEFAULT_SIZES);

    econtext->ecxt_param_exec_vals = NULL;
    econtext->ecxt_param_list_info = NULL;

    econtext->ecxt_aggvalues = NULL;
    econtext->ecxt_aggnulls = NULL;

    econtext->caseValue_datum = (Datum) 0;
    econtext->caseValue_isNull = true;

    econtext->domainValue_datum = (Datum) 0;
    econtext->domainValue_isNull = true;

    econtext->ecxt_estate = NULL;

    econtext->ecxt_callbacks = NULL;

    return econtext;
}

ExecAssignExprContext()

void ExecAssignExprContext	(	EState *	estate,
		PlanState *	planstate
	)

Definition at line 444 of file execUtils.c.

References CreateExprContext(), and PlanState::ps_ExprContext.

Referenced by ExecInitAgg(), ExecInitAppend(), ExecInitBitmapHeapScan(), ExecInitBitmapIndexScan(), ExecInitCteScan(), ExecInitCustomScan(), ExecInitForeignScan(), ExecInitFunctionScan(), ExecInitGather(), ExecInitGatherMerge(), ExecInitGroup(), ExecInitHash(), ExecInitHashJoin(), ExecInitIndexOnlyScan(), ExecInitIndexScan(), ExecInitLimit(), ExecInitMergeAppend(), ExecInitMergeJoin(), ExecInitModifyTable(), ExecInitNamedTuplestoreScan(), ExecInitNestLoop(), ExecInitProjectSet(), ExecInitResult(), ExecInitSampleScan(), ExecInitSeqScan(), ExecInitSetOp(), ExecInitSubqueryScan(), ExecInitTableFuncScan(), ExecInitTidScan(), ExecInitUnique(), ExecInitValuesScan(), ExecInitWindowAgg(), and ExecInitWorkTableScan().

{
    planstate->ps_ExprContext = CreateExprContext(estate);
}

ExecAssignProjectionInfo()

void ExecAssignProjectionInfo	(	PlanState *	planstate,
		TupleDesc	inputDesc
	)

Definition at line 499 of file execUtils.c.

References ExecBuildProjectionInfo(), PlanState::plan, PlanState::ps_ExprContext, PlanState::ps_ProjInfo, PlanState::ps_ResultTupleSlot, and Plan::targetlist.

Referenced by ExecConditionalAssignProjectionInfo(), ExecInitAgg(), ExecInitGroup(), ExecInitHashJoin(), ExecInitMergeJoin(), ExecInitNestLoop(), ExecInitResult(), and ExecInitWindowAgg().

{
    planstate->ps_ProjInfo =
        ExecBuildProjectionInfo(planstate->plan->targetlist,
                                planstate->ps_ExprContext,
                                planstate->ps_ResultTupleSlot,
                                planstate,
                                inputDesc);
}

ExecAssignScanType()

void ExecAssignScanType	(	ScanState *	scanstate,
		TupleDesc	tupDesc
	)

Definition at line 634 of file execUtils.c.

References ExecSetSlotDescriptor(), and ScanState::ss_ScanTupleSlot.

Referenced by ExecWorkTableScan().

{
    TupleTableSlot *slot = scanstate->ss_ScanTupleSlot;

    ExecSetSlotDescriptor(slot, tupDesc);
}

ExecCleanTargetListLength()

int ExecCleanTargetListLength

(

List *

targetlist

)

Definition at line 1085 of file execUtils.c.

References lfirst_node, and TargetEntry::resjunk.

Referenced by check_sql_fn_retval(), exec_rt_fetch(), and ExecTypeFromTLInternal().

{
    int         len = 0;
    ListCell   *tl;

    foreach(tl, targetlist)
    {
        TargetEntry *curTle = lfirst_node(TargetEntry, tl);

        if (!curTle->resjunk)
            len++;
    }
    return len;
}

ExecConditionalAssignProjectionInfo()

void ExecConditionalAssignProjectionInfo	(	PlanState *	planstate,
		TupleDesc	inputDesc,
		Index	varno
	)

Definition at line 519 of file execUtils.c.

References ExecAssignProjectionInfo(), ExecInitResultSlot(), PlanState::plan, PlanState::ps_ProjInfo, PlanState::ps_ResultTupleSlot, PlanState::resultops, PlanState::resultopsfixed, PlanState::resultopsset, PlanState::scanops, PlanState::scanopsfixed, PlanState::scanopsset, Plan::targetlist, tlist_matches_tupdesc(), and TTSOpsVirtual.

Referenced by ExecAssignScanProjectionInfo(), ExecAssignScanProjectionInfoWithVarno(), ExecInitGather(), and ExecInitGatherMerge().

{
    if (tlist_matches_tupdesc(planstate,
                              planstate->plan->targetlist,
                              varno,
                              inputDesc))
    {
        planstate->ps_ProjInfo = NULL;
        planstate->resultopsset = planstate->scanopsset;
        planstate->resultopsfixed = planstate->scanopsfixed;
        planstate->resultops = planstate->scanops;
    }
    else
    {
        if (!planstate->ps_ResultTupleSlot)
        {
            ExecInitResultSlot(planstate, &TTSOpsVirtual);
            planstate->resultops = &TTSOpsVirtual;
            planstate->resultopsfixed = true;
            planstate->resultopsset = true;
        }
        ExecAssignProjectionInfo(planstate, inputDesc);
    }
}

ExecCreateScanSlotFromOuterPlan()

void ExecCreateScanSlotFromOuterPlan	(	EState *	estate,
		ScanState *	scanstate,
		const TupleTableSlotOps *	tts_ops
	)

Definition at line 646 of file execUtils.c.

References ExecGetResultType(), ExecInitScanTupleSlot(), outerPlan, and outerPlanState.

Referenced by ExecInitAgg(), ExecInitGroup(), ExecInitMaterial(), ExecInitSort(), and ExecInitWindowAgg().

{
    PlanState  *outerPlan;
    TupleDesc   tupDesc;

    outerPlan = outerPlanState(scanstate);
    tupDesc = ExecGetResultType(outerPlan);

    ExecInitScanTupleSlot(estate, scanstate, tupDesc, tts_ops);
}

ExecFreeExprContext()

void ExecFreeExprContext

(

PlanState *

planstate

)

Definition at line 614 of file execUtils.c.

References PlanState::ps_ExprContext.

Referenced by ExecEndAgg(), ExecEndBitmapHeapScan(), ExecEndCteScan(), ExecEndCustomScan(), ExecEndForeignScan(), ExecEndFunctionScan(), ExecEndGather(), ExecEndGatherMerge(), ExecEndGroup(), ExecEndHash(), ExecEndHashJoin(), ExecEndIndexOnlyScan(), ExecEndIndexScan(), ExecEndLimit(), ExecEndMergeJoin(), ExecEndModifyTable(), ExecEndNamedTuplestoreScan(), ExecEndNestLoop(), ExecEndProjectSet(), ExecEndResult(), ExecEndSampleScan(), ExecEndSeqScan(), ExecEndSetOp(), ExecEndSubqueryScan(), ExecEndTableFuncScan(), ExecEndTidScan(), ExecEndUnique(), ExecEndValuesScan(), ExecEndWindowAgg(), and ExecEndWorkTableScan().

{
    /*
     * Per above discussion, don't actually delete the ExprContext. We do
     * unlink it from the plan node, though.
     */
    planstate->ps_ExprContext = NULL;
}

ExecGetRangeTableRelation()

Relation ExecGetRangeTableRelation	(	EState *	estate,
		Index	rti
	)

Definition at line 754 of file execUtils.c.

References AccessShareLock, Assert, CheckRelationLockedByMe(), EState::es_relations, exec_rt_fetch(), IsParallelWorker, NoLock, RangeTblEntry::relid, RangeTblEntry::rellockmode, RTE_RELATION, RangeTblEntry::rtekind, and table_open().

Referenced by exec_rt_fetch(), ExecCreatePartitionPruneState(), ExecOpenScanRelation(), and InitPlan().

{
    Relation    rel;

    Assert(rti > 0 && rti <= estate->es_range_table_size);

    rel = estate->es_relations[rti - 1];
    if (rel == NULL)
    {
        /* First time through, so open the relation */
        RangeTblEntry *rte = exec_rt_fetch(rti, estate);

        Assert(rte->rtekind == RTE_RELATION);

        if (!IsParallelWorker())
        {
            /*
             * In a normal query, we should already have the appropriate lock,
             * but verify that through an Assert.  Since there's already an
             * Assert inside table_open that insists on holding some lock, it
             * seems sufficient to check this only when rellockmode is higher
             * than the minimum.
             */
            rel = table_open(rte->relid, NoLock);
            Assert(rte->rellockmode == AccessShareLock ||
                   CheckRelationLockedByMe(rel, rte->rellockmode, false));
        }
        else
        {
            /*
             * If we are a parallel worker, we need to obtain our own local
             * lock on the relation.  This ensures sane behavior in case the
             * parent process exits before we do.
             */
            rel = table_open(rte->relid, rte->rellockmode);
        }

        estate->es_relations[rti - 1] = rel;
    }

    return rel;
}

ExecGetResultSlotOps()

const TupleTableSlotOps* ExecGetResultSlotOps	(	PlanState *	planstate,
		bool *	isfixed
	)

Definition at line 463 of file execUtils.c.

References PlanState::ps_ResultTupleSlot, PlanState::resultops, PlanState::resultopsfixed, PlanState::resultopsset, TTS_FIXED, TupleTableSlot::tts_ops, and TTSOpsVirtual.

Referenced by ExecComputeSlotInfo(), ExecInitAgg(), ExecInitGroup(), ExecInitHashJoin(), ExecInitLimit(), ExecInitLockRows(), ExecInitMergeJoin(), and ExecInitSubqueryScan().

{
    if (planstate->resultopsset && planstate->resultops)
    {
        if (isfixed)
            *isfixed = planstate->resultopsfixed;
        return planstate->resultops;
    }

    if (isfixed)
    {
        if (planstate->resultopsset)
            *isfixed = planstate->resultopsfixed;
        else if (planstate->ps_ResultTupleSlot)
            *isfixed = TTS_FIXED(planstate->ps_ResultTupleSlot);
        else
            *isfixed = false;
    }

    if (!planstate->ps_ResultTupleSlot)
        return &TTSOpsVirtual;

    return planstate->ps_ResultTupleSlot->tts_ops;
}

ExecGetResultType()

TupleDesc ExecGetResultType

(

PlanState *

planstate

)

Definition at line 454 of file execUtils.c.

References PlanState::ps_ResultTupleDesc.

Referenced by build_hash_table(), ExecComputeSlotInfo(), ExecCreateScanSlotFromOuterPlan(), ExecInitCteScan(), ExecInitGather(), ExecInitGatherMerge(), ExecInitGroup(), ExecInitHashJoin(), ExecInitMergeJoin(), ExecInitModifyTable(), ExecInitNestLoop(), ExecInitSetOp(), ExecInitSubqueryScan(), ExecInitUnique(), ExecSort(), ExecWorkTableScan(), initialize_phase(), and InitPlan().

{
    return planstate->ps_ResultTupleDesc;
}

ExecGetReturningSlot()

TupleTableSlot* ExecGetReturningSlot	(	EState *	estate,
		ResultRelInfo *	relInfo
	)

Definition at line 1148 of file execUtils.c.

References EState::es_query_cxt, ExecInitExtraTupleSlot(), MemoryContextSwitchTo(), RelationGetDescr, ResultRelInfo::ri_RelationDesc, ResultRelInfo::ri_ReturningSlot, and table_slot_callbacks().

Referenced by apply_returning_filter(), exec_rt_fetch(), ExecDelete(), and ExecInsert().

{
    if (relInfo->ri_ReturningSlot == NULL)
    {
        Relation    rel = relInfo->ri_RelationDesc;
        MemoryContext oldcontext = MemoryContextSwitchTo(estate->es_query_cxt);

        relInfo->ri_ReturningSlot =
            ExecInitExtraTupleSlot(estate,
                                   RelationGetDescr(rel),
                                   table_slot_callbacks(rel));

        MemoryContextSwitchTo(oldcontext);
    }

    return relInfo->ri_ReturningSlot;
}

ExecGetTriggerNewSlot()

TupleTableSlot* ExecGetTriggerNewSlot	(	EState *	estate,
		ResultRelInfo *	relInfo
	)

Definition at line 1126 of file execUtils.c.

References EState::es_query_cxt, ExecInitExtraTupleSlot(), MemoryContextSwitchTo(), RelationGetDescr, ResultRelInfo::ri_RelationDesc, ResultRelInfo::ri_TrigNewSlot, and table_slot_callbacks().

Referenced by AfterTriggerExecute(), and exec_rt_fetch().

{
    if (relInfo->ri_TrigNewSlot == NULL)
    {
        Relation    rel = relInfo->ri_RelationDesc;
        MemoryContext oldcontext = MemoryContextSwitchTo(estate->es_query_cxt);

        relInfo->ri_TrigNewSlot =
            ExecInitExtraTupleSlot(estate,
                                   RelationGetDescr(rel),
                                   table_slot_callbacks(rel));

        MemoryContextSwitchTo(oldcontext);
    }

    return relInfo->ri_TrigNewSlot;
}

ExecGetTriggerOldSlot()

TupleTableSlot* ExecGetTriggerOldSlot	(	EState *	estate,
		ResultRelInfo *	relInfo
	)

Definition at line 1104 of file execUtils.c.

References EState::es_query_cxt, ExecInitExtraTupleSlot(), MemoryContextSwitchTo(), RelationGetDescr, ResultRelInfo::ri_RelationDesc, ResultRelInfo::ri_TrigOldSlot, and table_slot_callbacks().

Referenced by AfterTriggerExecute(), exec_rt_fetch(), ExecARDeleteTriggers(), ExecARUpdateTriggers(), ExecBRDeleteTriggers(), ExecBRUpdateTriggers(), ExecIRDeleteTriggers(), and ExecIRUpdateTriggers().

{
    if (relInfo->ri_TrigOldSlot == NULL)
    {
        Relation    rel = relInfo->ri_RelationDesc;
        MemoryContext oldcontext = MemoryContextSwitchTo(estate->es_query_cxt);

        relInfo->ri_TrigOldSlot =
            ExecInitExtraTupleSlot(estate,
                                   RelationGetDescr(rel),
                                   table_slot_callbacks(rel));

        MemoryContextSwitchTo(oldcontext);
    }

    return relInfo->ri_TrigOldSlot;
}

ExecInitRangeTable()

void ExecInitRangeTable	(	EState *	estate,
		List *	rangeTable
	)

Definition at line 724 of file execUtils.c.

References EState::es_range_table, EState::es_range_table_size, EState::es_relations, EState::es_rowmarks, list_length(), and palloc0().

Referenced by CopyFrom(), create_estate_for_relation(), and InitPlan().

{
    /* Remember the range table List as-is */
    estate->es_range_table = rangeTable;

    /* Set size of associated arrays */
    estate->es_range_table_size = list_length(rangeTable);

    /*
     * Allocate an array to store an open Relation corresponding to each
     * rangetable entry, and initialize entries to NULL.  Relations are opened
     * and stored here as needed.
     */
    estate->es_relations = (Relation *)
        palloc0(estate->es_range_table_size * sizeof(Relation));

    /*
     * es_rowmarks is also parallel to the es_range_table, but it's allocated
     * only if needed.
     */
    estate->es_rowmarks = NULL;
}

ExecOpenScanRelation()

Relation ExecOpenScanRelation	(	EState *	estate,
		Index	scanrelid,
		int	eflags
	)

Definition at line 693 of file execUtils.c.

References ereport, errcode(), errhint(), errmsg(), ERROR, EXEC_FLAG_EXPLAIN_ONLY, EXEC_FLAG_WITH_NO_DATA, ExecGetRangeTableRelation(), RelationGetRelationName, and RelationIsScannable.

Referenced by ExecInitBitmapHeapScan(), ExecInitCustomScan(), ExecInitForeignScan(), ExecInitIndexOnlyScan(), ExecInitIndexScan(), ExecInitSampleScan(), ExecInitSeqScan(), ExecInitTidScan(), and postgresBeginDirectModify().

{
    Relation    rel;

    /* Open the relation. */
    rel = ExecGetRangeTableRelation(estate, scanrelid);

    /*
     * Complain if we're attempting a scan of an unscannable relation, except
     * when the query won't actually be run.  This is a slightly klugy place
     * to do this, perhaps, but there is no better place.
     */
    if ((eflags & (EXEC_FLAG_EXPLAIN_ONLY | EXEC_FLAG_WITH_NO_DATA)) == 0 &&
        !RelationIsScannable(rel))
        ereport(ERROR,
                (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
                 errmsg("materialized view \"%s\" has not been populated",
                        RelationGetRelationName(rel)),
                 errhint("Use the REFRESH MATERIALIZED VIEW command.")));

    return rel;
}

ExecRelationIsTargetRelation()

bool ExecRelationIsTargetRelation	(	EState *	estate,
		Index	scanrelid
	)

Definition at line 671 of file execUtils.c.

References EState::es_num_result_relations, EState::es_result_relations, and i.

{
    ResultRelInfo *resultRelInfos;
    int         i;

    resultRelInfos = estate->es_result_relations;
    for (i = 0; i < estate->es_num_result_relations; i++)
    {
        if (resultRelInfos[i].ri_RangeTableIndex == scanrelid)
            return true;
    }
    return false;
}

ExecTargetListLength()

int ExecTargetListLength

(

List *

targetlist

)

Definition at line 1075 of file execUtils.c.

References list_length().

Referenced by exec_rt_fetch(), and ExecTypeFromTLInternal().

{
    /* This used to be more complex, but fjoins are dead */
    return list_length(targetlist);
}

executor_errposition()

int executor_errposition	(	EState *	estate,
		int	location
	)

Definition at line 836 of file execUtils.c.

References errposition(), EState::es_sourceText, and pg_mbstrlen_with_len().

Referenced by exec_rt_fetch(), ExecInitFunc(), and init_sexpr().

{
    int         pos;

    /* No-op if location was not provided */
    if (location < 0)
        return 0;
    /* Can't do anything if source text is not available */
    if (estate == NULL || estate->es_sourceText == NULL)
        return 0;
    /* Convert offset to character number */
    pos = pg_mbstrlen_with_len(estate->es_sourceText, location) + 1;
    /* And pass it to the ereport mechanism */
    return errposition(pos);
}

FreeExecutorState()

void FreeExecutorState

(

EState *

estate

)

Definition at line 190 of file execUtils.c.

References DestroyPartitionDirectory(), EState::es_exprcontexts, EState::es_jit, EState::es_partition_directory, EState::es_query_cxt, FreeExprContext(), jit_release_context(), linitial, and MemoryContextDelete().

Referenced by afterTriggerInvokeEvents(), apply_handle_delete(), apply_handle_insert(), apply_handle_update(), ATRewriteTable(), check_default_partition_contents(), compute_index_stats(), CopyFrom(), EvalPlanQualEnd(), evaluate_expr(), ExecuteCallStmt(), ExecuteQuery(), ExecuteTruncateGuts(), ExplainExecuteQuery(), get_qual_for_range(), heapam_index_build_range_scan(), heapam_index_validate_scan(), IndexCheckExclusion(), operator_predicate_proof(), plpgsql_inline_handler(), plpgsql_xact_cb(), standard_ExecutorEnd(), StoreAttrDefault(), tuplesort_end(), unique_key_recheck(), validateCheckConstraint(), and validateDomainConstraint().

{
    /*
     * Shut down and free any remaining ExprContexts.  We do this explicitly
     * to ensure that any remaining shutdown callbacks get called (since they
     * might need to release resources that aren't simply memory within the
     * per-query memory context).
     */
    while (estate->es_exprcontexts)
    {
        /*
         * XXX: seems there ought to be a faster way to implement this than
         * repeated list_delete(), no?
         */
        FreeExprContext((ExprContext *) linitial(estate->es_exprcontexts),
                        true);
        /* FreeExprContext removed the list link for us */
    }

    /* release JIT context, if allocated */
    if (estate->es_jit)
    {
        jit_release_context(estate->es_jit);
        estate->es_jit = NULL;
    }

    /* release partition directory, if allocated */
    if (estate->es_partition_directory)
    {
        DestroyPartitionDirectory(estate->es_partition_directory);
        estate->es_partition_directory = NULL;
    }

    /*
     * Free the per-query memory context, thereby releasing all working
     * memory, including the EState node itself.
     */
    MemoryContextDelete(estate->es_query_cxt);
}

FreeExprContext()

void FreeExprContext	(	ExprContext *	econtext,
		bool	isCommit
	)

Definition at line 375 of file execUtils.c.

References ExprContext::ecxt_estate, ExprContext::ecxt_per_tuple_memory, EState::es_exprcontexts, list_delete_ptr(), MemoryContextDelete(), pfree(), and ShutdownExprContext().

Referenced by ExecEndBitmapIndexScan(), ExecEndIndexOnlyScan(), ExecEndIndexScan(), FreeExecutorState(), plpgsql_destroy_econtext(), and plpgsql_subxact_cb().

{
    EState     *estate;

    /* Call any registered callbacks */
    ShutdownExprContext(econtext, isCommit);
    /* And clean up the memory used */
    MemoryContextDelete(econtext->ecxt_per_tuple_memory);
    /* Unlink self from owning EState, if any */
    estate = econtext->ecxt_estate;
    if (estate)
        estate->es_exprcontexts = list_delete_ptr(estate->es_exprcontexts,
                                                  econtext);
    /* And delete the ExprContext node */
    pfree(econtext);
}

GetAttributeByName()

Datum GetAttributeByName	(	HeapTupleHeader	tuple,
		const char *	attname,
		bool *	isNull
	)

Definition at line 961 of file execUtils.c.

References elog, ERROR, heap_getattr, HeapTupleHeaderGetDatumLength, HeapTupleHeaderGetTypeId, HeapTupleHeaderGetTypMod, i, InvalidAttrNumber, InvalidOid, ItemPointerSetInvalid, lookup_rowtype_tupdesc(), namestrcmp(), TupleDescData::natts, ReleaseTupleDesc, HeapTupleData::t_data, HeapTupleData::t_len, HeapTupleData::t_self, HeapTupleData::t_tableOid, and TupleDescAttr.

Referenced by c_overpaid(), exec_rt_fetch(), and overpaid().

{
    AttrNumber  attrno;
    Datum       result;
    Oid         tupType;
    int32       tupTypmod;
    TupleDesc   tupDesc;
    HeapTupleData tmptup;
    int         i;

    if (attname == NULL)
        elog(ERROR, "invalid attribute name");

    if (isNull == NULL)
        elog(ERROR, "a NULL isNull pointer was passed");

    if (tuple == NULL)
    {
        /* Kinda bogus but compatible with old behavior... */
        *isNull = true;
        return (Datum) 0;
    }

    tupType = HeapTupleHeaderGetTypeId(tuple);
    tupTypmod = HeapTupleHeaderGetTypMod(tuple);
    tupDesc = lookup_rowtype_tupdesc(tupType, tupTypmod);

    attrno = InvalidAttrNumber;
    for (i = 0; i < tupDesc->natts; i++)
    {
        Form_pg_attribute att = TupleDescAttr(tupDesc, i);

        if (namestrcmp(&(att->attname), attname) == 0)
        {
            attrno = att->attnum;
            break;
        }
    }

    if (attrno == InvalidAttrNumber)
        elog(ERROR, "attribute \"%s\" does not exist", attname);

    /*
     * heap_getattr needs a HeapTuple not a bare HeapTupleHeader.  We set all
     * the fields in the struct just in case user tries to inspect system
     * columns.
     */
    tmptup.t_len = HeapTupleHeaderGetDatumLength(tuple);
    ItemPointerSetInvalid(&(tmptup.t_self));
    tmptup.t_tableOid = InvalidOid;
    tmptup.t_data = tuple;

    result = heap_getattr(&tmptup,
                          attrno,
                          tupDesc,
                          isNull);

    ReleaseTupleDesc(tupDesc);

    return result;
}

GetAttributeByNum()

Datum GetAttributeByNum	(	HeapTupleHeader	tuple,
		AttrNumber	attrno,
		bool *	isNull
	)

Definition at line 1024 of file execUtils.c.

References AttributeNumberIsValid, elog, ERROR, heap_getattr, HeapTupleHeaderGetDatumLength, HeapTupleHeaderGetTypeId, HeapTupleHeaderGetTypMod, InvalidOid, ItemPointerSetInvalid, lookup_rowtype_tupdesc(), ReleaseTupleDesc, HeapTupleData::t_data, HeapTupleData::t_len, HeapTupleData::t_self, and HeapTupleData::t_tableOid.

Referenced by exec_rt_fetch().

{
    Datum       result;
    Oid         tupType;
    int32       tupTypmod;
    TupleDesc   tupDesc;
    HeapTupleData tmptup;

    if (!AttributeNumberIsValid(attrno))
        elog(ERROR, "invalid attribute number %d", attrno);

    if (isNull == NULL)
        elog(ERROR, "a NULL isNull pointer was passed");

    if (tuple == NULL)
    {
        /* Kinda bogus but compatible with old behavior... */
        *isNull = true;
        return (Datum) 0;
    }

    tupType = HeapTupleHeaderGetTypeId(tuple);
    tupTypmod = HeapTupleHeaderGetTypMod(tuple);
    tupDesc = lookup_rowtype_tupdesc(tupType, tupTypmod);

    /*
     * heap_getattr needs a HeapTuple not a bare HeapTupleHeader.  We set all
     * the fields in the struct just in case user tries to inspect system
     * columns.
     */
    tmptup.t_len = HeapTupleHeaderGetDatumLength(tuple);
    ItemPointerSetInvalid(&(tmptup.t_self));
    tmptup.t_tableOid = InvalidOid;
    tmptup.t_data = tuple;

    result = heap_getattr(&tmptup,
                          attrno,
                          tupDesc,
                          isNull);

    ReleaseTupleDesc(tupDesc);

    return result;
}

MakePerTupleExprContext()

ExprContext* MakePerTupleExprContext

(

EState *

estate

)

Definition at line 417 of file execUtils.c.

References CreateExprContext(), and EState::es_per_tuple_exprcontext.

{
    if (estate->es_per_tuple_exprcontext == NULL)
        estate->es_per_tuple_exprcontext = CreateExprContext(estate);

    return estate->es_per_tuple_exprcontext;
}

RegisterExprContextCallback()

void RegisterExprContextCallback	(	ExprContext *	econtext,
		ExprContextCallbackFunction	function,
		Datum	arg
	)

Definition at line 863 of file execUtils.c.

References arg, ExprContext_CB::arg, ExprContext::ecxt_callbacks, ExprContext::ecxt_per_query_memory, ExprContext_CB::function, MemoryContextAlloc(), and ExprContext_CB::next.

Referenced by AggRegisterCallback(), exec_rt_fetch(), ExecMakeFunctionResultSet(), ExecPrepareTuplestoreResult(), fmgr_sql(), get_cached_rowtype(), and init_MultiFuncCall().

{
    ExprContext_CB *ecxt_callback;

    /* Save the info in appropriate memory context */
    ecxt_callback = (ExprContext_CB *)
        MemoryContextAlloc(econtext->ecxt_per_query_memory,
                           sizeof(ExprContext_CB));

    ecxt_callback->function = function;
    ecxt_callback->arg = arg;

    /* link to front of list for appropriate execution order */
    ecxt_callback->next = econtext->ecxt_callbacks;
    econtext->ecxt_callbacks = ecxt_callback;
}

ReScanExprContext()

void ReScanExprContext

(

ExprContext *

econtext

)

Definition at line 402 of file execUtils.c.

References ExprContext::ecxt_per_tuple_memory, MemoryContextReset(), and ShutdownExprContext().

Referenced by agg_retrieve_direct(), domain_check_input(), ExecEndAgg(), ExecReScan(), ExecReScanAgg(), and ValuesNext().

{
    /* Call any registered callbacks */
    ShutdownExprContext(econtext, true);
    /* And clean up the memory used */
    MemoryContextReset(econtext->ecxt_per_tuple_memory);
}

ShutdownExprContext()

static void ShutdownExprContext ( ExprContext *  econtext, bool  isCommit  )

static

Definition at line 920 of file execUtils.c.

References ExprContext_CB::arg, ExprContext::ecxt_callbacks, ExprContext::ecxt_per_tuple_memory, ExprContext_CB::function, MemoryContextSwitchTo(), ExprContext_CB::next, and pfree().

Referenced by FreeExprContext(), and ReScanExprContext().

{
    ExprContext_CB *ecxt_callback;
    MemoryContext oldcontext;

    /* Fast path in normal case where there's nothing to do. */
    if (econtext->ecxt_callbacks == NULL)
        return;

    /*
     * Call the callbacks in econtext's per-tuple context.  This ensures that
     * any memory they might leak will get cleaned up.
     */
    oldcontext = MemoryContextSwitchTo(econtext->ecxt_per_tuple_memory);

    /*
     * Call each callback function in reverse registration order.
     */
    while ((ecxt_callback = econtext->ecxt_callbacks) != NULL)
    {
        econtext->ecxt_callbacks = ecxt_callback->next;
        if (isCommit)
            ecxt_callback->function(ecxt_callback->arg);
        pfree(ecxt_callback);
    }

    MemoryContextSwitchTo(oldcontext);
}

tlist_matches_tupdesc()

static bool tlist_matches_tupdesc ( PlanState *  ps, List *  tlist, Index  varno, TupleDesc  tupdesc  )

static

Definition at line 546 of file execUtils.c.

References Assert, IsA, lfirst, list_head(), lnext(), TupleDescData::natts, TupleDescAttr, Var::varattno, Var::varlevelsup, Var::varno, Var::vartype, and Var::vartypmod.

Referenced by ExecConditionalAssignProjectionInfo().

{
    int         numattrs = tupdesc->natts;
    int         attrno;
    ListCell   *tlist_item = list_head(tlist);

    /* Check the tlist attributes */
    for (attrno = 1; attrno <= numattrs; attrno++)
    {
        Form_pg_attribute att_tup = TupleDescAttr(tupdesc, attrno - 1);
        Var        *var;

        if (tlist_item == NULL)
            return false;       /* tlist too short */
        var = (Var *) ((TargetEntry *) lfirst(tlist_item))->expr;
        if (!var || !IsA(var, Var))
            return false;       /* tlist item not a Var */
        /* if these Asserts fail, planner messed up */
        Assert(var->varno == varno);
        Assert(var->varlevelsup == 0);
        if (var->varattno != attrno)
            return false;       /* out of order */
        if (att_tup->attisdropped)
            return false;       /* table contains dropped columns */
        if (att_tup->atthasmissing)
            return false;       /* table contains cols with missing values */

        /*
         * Note: usually the Var's type should match the tupdesc exactly, but
         * in situations involving unions of columns that have different
         * typmods, the Var may have come from above the union and hence have
         * typmod -1.  This is a legitimate situation since the Var still
         * describes the column, just not as exactly as the tupdesc does. We
         * could change the planner to prevent it, but it'd then insert
         * projection steps just to convert from specific typmod to typmod -1,
         * which is pretty silly.
         */
        if (var->vartype != att_tup->atttypid ||
            (var->vartypmod != att_tup->atttypmod &&
             var->vartypmod != -1))
            return false;       /* type mismatch */

        tlist_item = lnext(tlist, tlist_item);
    }

    if (tlist_item)
        return false;           /* tlist too long */

    return true;
}

UnregisterExprContextCallback()

void UnregisterExprContextCallback	(	ExprContext *	econtext,
		ExprContextCallbackFunction	function,
		Datum	arg
	)

Definition at line 889 of file execUtils.c.

References ExprContext_CB::arg, ExprContext::ecxt_callbacks, ExprContext_CB::function, ExprContext_CB::next, and pfree().

Referenced by end_MultiFuncCall(), exec_rt_fetch(), and fmgr_sql().

{
    ExprContext_CB **prev_callback;
    ExprContext_CB *ecxt_callback;

    prev_callback = &econtext->ecxt_callbacks;

    while ((ecxt_callback = *prev_callback) != NULL)
    {
        if (ecxt_callback->function == function && ecxt_callback->arg == arg)
        {
            *prev_callback = ecxt_callback->next;
            pfree(ecxt_callback);
        }
        else
            prev_callback = &ecxt_callback->next;
    }
}

UpdateChangedParamSet()

void UpdateChangedParamSet	(	PlanState *	node,
		Bitmapset *	newchg
	)

Definition at line 802 of file execUtils.c.

References Plan::allParam, bms_free(), bms_intersect(), bms_is_empty(), bms_join(), PlanState::chgParam, and PlanState::plan.

Referenced by ExecReScan(), ExecReScanAppend(), ExecReScanBitmapAnd(), ExecReScanBitmapOr(), ExecReScanMergeAppend(), and ExecReScanSubqueryScan().

{
    Bitmapset  *parmset;

    /*
     * The plan node only depends on params listed in its allParam set. Don't
     * include anything else into its chgParam set.
     */
    parmset = bms_intersect(node->plan->allParam, newchg);

    /*
     * Keep node->chgParam == NULL if there's not actually any members; this
     * allows the simplest possible tests in executor node files.
     */
    if (!bms_is_empty(parmset))
        node->chgParam = bms_join(node->chgParam, parmset);
    else
        bms_free(parmset);
}