execdesc.h File Reference

#include "nodes/execnodes.h"
#include "tcop/dest.h"

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Data Structures
struct	QueryDesc

Typedefs
typedef struct QueryDesc	QueryDesc

Functions
QueryDesc *	CreateQueryDesc (PlannedStmt *plannedstmt, const char *sourceText, Snapshot snapshot, Snapshot crosscheck_snapshot, DestReceiver *dest, ParamListInfo params, QueryEnvironment *queryEnv, int instrument_options)
void	FreeQueryDesc (QueryDesc *qdesc)

Typedef Documentation

QueryDesc

typedef struct QueryDesc QueryDesc

Function Documentation

CreateQueryDesc()

QueryDesc * CreateQueryDesc ( PlannedStmt *  plannedstmt, const char *  sourceText, Snapshot  snapshot, Snapshot  crosscheck_snapshot, DestReceiver *  dest, ParamListInfo  params, QueryEnvironment *  queryEnv, int  instrument_options  )

extern

Definition at line 68 of file pquery.c.

{
    QueryDesc  *qd = palloc_object(QueryDesc);
 
    qd->operation = plannedstmt->commandType;   /* operation */
    qd->plannedstmt = plannedstmt;  /* plan */
    qd->sourceText = sourceText;    /* query text */
    qd->snapshot = RegisterSnapshot(snapshot);  /* snapshot */
    /* RI check snapshot */
    qd->crosscheck_snapshot = RegisterSnapshot(crosscheck_snapshot);
    qd->dest = dest;            /* output dest */
    qd->params = params;        /* parameter values passed into query */
    qd->queryEnv = queryEnv;
    qd->instrument_options = instrument_options;    /* instrumentation wanted? */
 
    /* null these fields until set by ExecutorStart */
    qd->tupDesc = NULL;
    qd->estate = NULL;
    qd->planstate = NULL;
    qd->totaltime = NULL;
 
    /* not yet executed */
    qd->already_executed = false;
 
    return qd;
}

References QueryDesc::already_executed, PlannedStmt::commandType, QueryDesc::crosscheck_snapshot, QueryDesc::dest, QueryDesc::estate, fb(), QueryDesc::instrument_options, QueryDesc::operation, palloc_object, QueryDesc::params, QueryDesc::plannedstmt, QueryDesc::planstate, QueryDesc::queryEnv, RegisterSnapshot(), QueryDesc::snapshot, QueryDesc::sourceText, QueryDesc::totaltime, and QueryDesc::tupDesc.

Referenced by _SPI_execute_plan(), BeginCopyTo(), ExecCreateTableAs(), ExecParallelGetQueryDesc(), execute_sql_string(), ExplainOnePlan(), PortalStart(), postquel_start(), ProcessQuery(), and refresh_matview_datafill().

FreeQueryDesc()

void FreeQueryDesc ( QueryDesc *  qdesc )

extern

Definition at line 106 of file pquery.c.

{
    /* Can't be a live query */
    Assert(qdesc->estate == NULL);
 
    /* forget our snapshots */
    UnregisterSnapshot(qdesc->snapshot);
    UnregisterSnapshot(qdesc->crosscheck_snapshot);
 
    /* Only the QueryDesc itself need be freed */
    pfree(qdesc);
}

References Assert, fb(), pfree(), and UnregisterSnapshot().

Referenced by _SPI_execute_plan(), EndCopyTo(), ExecCreateTableAs(), execute_sql_string(), ExplainOnePlan(), ParallelQueryMain(), PersistHoldablePortal(), PortalCleanup(), postquel_end(), ProcessQuery(), and refresh_matview_datafill().