LCOV - code coverage report
Current view: top level - src/backend/executor - execMain.c (source / functions) Hit Total Coverage
Test: PostgreSQL 18beta1 Lines: 851 922 92.3 %
Date: 2025-06-06 18:17:16 Functions: 44 44 100.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /*-------------------------------------------------------------------------
       2             :  *
       3             :  * execMain.c
       4             :  *    top level executor interface routines
       5             :  *
       6             :  * INTERFACE ROUTINES
       7             :  *  ExecutorStart()
       8             :  *  ExecutorRun()
       9             :  *  ExecutorFinish()
      10             :  *  ExecutorEnd()
      11             :  *
      12             :  *  These four procedures are the external interface to the executor.
      13             :  *  In each case, the query descriptor is required as an argument.
      14             :  *
      15             :  *  ExecutorStart must be called at the beginning of execution of any
      16             :  *  query plan and ExecutorEnd must always be called at the end of
      17             :  *  execution of a plan (unless it is aborted due to error).
      18             :  *
      19             :  *  ExecutorRun accepts direction and count arguments that specify whether
      20             :  *  the plan is to be executed forwards, backwards, and for how many tuples.
      21             :  *  In some cases ExecutorRun may be called multiple times to process all
      22             :  *  the tuples for a plan.  It is also acceptable to stop short of executing
      23             :  *  the whole plan (but only if it is a SELECT).
      24             :  *
      25             :  *  ExecutorFinish must be called after the final ExecutorRun call and
      26             :  *  before ExecutorEnd.  This can be omitted only in case of EXPLAIN,
      27             :  *  which should also omit ExecutorRun.
      28             :  *
      29             :  * Portions Copyright (c) 1996-2025, PostgreSQL Global Development Group
      30             :  * Portions Copyright (c) 1994, Regents of the University of California
      31             :  *
      32             :  *
      33             :  * IDENTIFICATION
      34             :  *    src/backend/executor/execMain.c
      35             :  *
      36             :  *-------------------------------------------------------------------------
      37             :  */
      38             : #include "postgres.h"
      39             : 
      40             : #include "access/sysattr.h"
      41             : #include "access/table.h"
      42             : #include "access/tableam.h"
      43             : #include "access/xact.h"
      44             : #include "catalog/namespace.h"
      45             : #include "catalog/partition.h"
      46             : #include "commands/matview.h"
      47             : #include "commands/trigger.h"
      48             : #include "executor/executor.h"
      49             : #include "executor/execPartition.h"
      50             : #include "executor/nodeSubplan.h"
      51             : #include "foreign/fdwapi.h"
      52             : #include "mb/pg_wchar.h"
      53             : #include "miscadmin.h"
      54             : #include "nodes/queryjumble.h"
      55             : #include "parser/parse_relation.h"
      56             : #include "pgstat.h"
      57             : #include "rewrite/rewriteHandler.h"
      58             : #include "tcop/utility.h"
      59             : #include "utils/acl.h"
      60             : #include "utils/backend_status.h"
      61             : #include "utils/lsyscache.h"
      62             : #include "utils/partcache.h"
      63             : #include "utils/rls.h"
      64             : #include "utils/snapmgr.h"
      65             : 
      66             : 
      67             : /* Hooks for plugins to get control in ExecutorStart/Run/Finish/End */
      68             : ExecutorStart_hook_type ExecutorStart_hook = NULL;
      69             : ExecutorRun_hook_type ExecutorRun_hook = NULL;
      70             : ExecutorFinish_hook_type ExecutorFinish_hook = NULL;
      71             : ExecutorEnd_hook_type ExecutorEnd_hook = NULL;
      72             : 
      73             : /* Hook for plugin to get control in ExecCheckPermissions() */
      74             : ExecutorCheckPerms_hook_type ExecutorCheckPerms_hook = NULL;
      75             : 
      76             : /* decls for local routines only used within this module */
      77             : static void InitPlan(QueryDesc *queryDesc, int eflags);
      78             : static void CheckValidRowMarkRel(Relation rel, RowMarkType markType);
      79             : static void ExecPostprocessPlan(EState *estate);
      80             : static void ExecEndPlan(PlanState *planstate, EState *estate);
      81             : static void ExecutePlan(QueryDesc *queryDesc,
      82             :                         CmdType operation,
      83             :                         bool sendTuples,
      84             :                         uint64 numberTuples,
      85             :                         ScanDirection direction,
      86             :                         DestReceiver *dest);
      87             : static bool ExecCheckOneRelPerms(RTEPermissionInfo *perminfo);
      88             : static bool ExecCheckPermissionsModified(Oid relOid, Oid userid,
      89             :                                          Bitmapset *modifiedCols,
      90             :                                          AclMode requiredPerms);
      91             : static void ExecCheckXactReadOnly(PlannedStmt *plannedstmt);
      92             : static void EvalPlanQualStart(EPQState *epqstate, Plan *planTree);
      93             : static void ReportNotNullViolationError(ResultRelInfo *resultRelInfo,
      94             :                                         TupleTableSlot *slot,
      95             :                                         EState *estate, int attnum);
      96             : 
      97             : /* end of local decls */
      98             : 
      99             : 
     100             : /* ----------------------------------------------------------------
     101             :  *      ExecutorStart
     102             :  *
     103             :  *      This routine must be called at the beginning of any execution of any
     104             :  *      query plan
     105             :  *
     106             :  * Takes a QueryDesc previously created by CreateQueryDesc (which is separate
     107             :  * only because some places use QueryDescs for utility commands).  The tupDesc
     108             :  * field of the QueryDesc is filled in to describe the tuples that will be
     109             :  * returned, and the internal fields (estate and planstate) are set up.
     110             :  *
     111             :  * eflags contains flag bits as described in executor.h.
     112             :  *
     113             :  * NB: the CurrentMemoryContext when this is called will become the parent
     114             :  * of the per-query context used for this Executor invocation.
     115             :  *
     116             :  * We provide a function hook variable that lets loadable plugins
     117             :  * get control when ExecutorStart is called.  Such a plugin would
     118             :  * normally call standard_ExecutorStart().
     119             :  *
     120             :  * ----------------------------------------------------------------
     121             :  */
     122             : void
     123      583982 : ExecutorStart(QueryDesc *queryDesc, int eflags)
     124             : {
     125             :     /*
     126             :      * In some cases (e.g. an EXECUTE statement or an execute message with the
     127             :      * extended query protocol) the query_id won't be reported, so do it now.
     128             :      *
     129             :      * Note that it's harmless to report the query_id multiple times, as the
     130             :      * call will be ignored if the top level query_id has already been
     131             :      * reported.
     132             :      */
     133      583982 :     pgstat_report_query_id(queryDesc->plannedstmt->queryId, false);
     134             : 
     135      583982 :     if (ExecutorStart_hook)
     136      115030 :         (*ExecutorStart_hook) (queryDesc, eflags);
     137             :     else
     138      468952 :         standard_ExecutorStart(queryDesc, eflags);
     139      581976 : }
     140             : 
     141             : void
     142      583982 : standard_ExecutorStart(QueryDesc *queryDesc, int eflags)
     143             : {
     144             :     EState     *estate;
     145             :     MemoryContext oldcontext;
     146             : 
     147             :     /* sanity checks: queryDesc must not be started already */
     148             :     Assert(queryDesc != NULL);
     149             :     Assert(queryDesc->estate == NULL);
     150             : 
     151             :     /* caller must ensure the query's snapshot is active */
     152             :     Assert(GetActiveSnapshot() == queryDesc->snapshot);
     153             : 
     154             :     /*
     155             :      * If the transaction is read-only, we need to check if any writes are
     156             :      * planned to non-temporary tables.  EXPLAIN is considered read-only.
     157             :      *
     158             :      * Don't allow writes in parallel mode.  Supporting UPDATE and DELETE
     159             :      * would require (a) storing the combo CID hash in shared memory, rather
     160             :      * than synchronizing it just once at the start of parallelism, and (b) an
     161             :      * alternative to heap_update()'s reliance on xmax for mutual exclusion.
     162             :      * INSERT may have no such troubles, but we forbid it to simplify the
     163             :      * checks.
     164             :      *
     165             :      * We have lower-level defenses in CommandCounterIncrement and elsewhere
     166             :      * against performing unsafe operations in parallel mode, but this gives a
     167             :      * more user-friendly error message.
     168             :      */
     169      583982 :     if ((XactReadOnly || IsInParallelMode()) &&
     170       73640 :         !(eflags & EXEC_FLAG_EXPLAIN_ONLY))
     171       73640 :         ExecCheckXactReadOnly(queryDesc->plannedstmt);
     172             : 
     173             :     /*
     174             :      * Build EState, switch into per-query memory context for startup.
     175             :      */
     176      583950 :     estate = CreateExecutorState();
     177      583950 :     queryDesc->estate = estate;
     178             : 
     179      583950 :     oldcontext = MemoryContextSwitchTo(estate->es_query_cxt);
     180             : 
     181             :     /*
     182             :      * Fill in external parameters, if any, from queryDesc; and allocate
     183             :      * workspace for internal parameters
     184             :      */
     185      583950 :     estate->es_param_list_info = queryDesc->params;
     186             : 
     187      583950 :     if (queryDesc->plannedstmt->paramExecTypes != NIL)
     188             :     {
     189             :         int         nParamExec;
     190             : 
     191      186800 :         nParamExec = list_length(queryDesc->plannedstmt->paramExecTypes);
     192      186800 :         estate->es_param_exec_vals = (ParamExecData *)
     193      186800 :             palloc0(nParamExec * sizeof(ParamExecData));
     194             :     }
     195             : 
     196             :     /* We now require all callers to provide sourceText */
     197             :     Assert(queryDesc->sourceText != NULL);
     198      583950 :     estate->es_sourceText = queryDesc->sourceText;
     199             : 
     200             :     /*
     201             :      * Fill in the query environment, if any, from queryDesc.
     202             :      */
     203      583950 :     estate->es_queryEnv = queryDesc->queryEnv;
     204             : 
     205             :     /*
     206             :      * If non-read-only query, set the command ID to mark output tuples with
     207             :      */
     208      583950 :     switch (queryDesc->operation)
     209             :     {
     210      467848 :         case CMD_SELECT:
     211             : 
     212             :             /*
     213             :              * SELECT FOR [KEY] UPDATE/SHARE and modifying CTEs need to mark
     214             :              * tuples
     215             :              */
     216      467848 :             if (queryDesc->plannedstmt->rowMarks != NIL ||
     217      459884 :                 queryDesc->plannedstmt->hasModifyingCTE)
     218        8098 :                 estate->es_output_cid = GetCurrentCommandId(true);
     219             : 
     220             :             /*
     221             :              * A SELECT without modifying CTEs can't possibly queue triggers,
     222             :              * so force skip-triggers mode. This is just a marginal efficiency
     223             :              * hack, since AfterTriggerBeginQuery/AfterTriggerEndQuery aren't
     224             :              * all that expensive, but we might as well do it.
     225             :              */
     226      467848 :             if (!queryDesc->plannedstmt->hasModifyingCTE)
     227      467708 :                 eflags |= EXEC_FLAG_SKIP_TRIGGERS;
     228      467848 :             break;
     229             : 
     230      116102 :         case CMD_INSERT:
     231             :         case CMD_DELETE:
     232             :         case CMD_UPDATE:
     233             :         case CMD_MERGE:
     234      116102 :             estate->es_output_cid = GetCurrentCommandId(true);
     235      116102 :             break;
     236             : 
     237           0 :         default:
     238           0 :             elog(ERROR, "unrecognized operation code: %d",
     239             :                  (int) queryDesc->operation);
     240             :             break;
     241             :     }
     242             : 
     243             :     /*
     244             :      * Copy other important information into the EState
     245             :      */
     246      583950 :     estate->es_snapshot = RegisterSnapshot(queryDesc->snapshot);
     247      583950 :     estate->es_crosscheck_snapshot = RegisterSnapshot(queryDesc->crosscheck_snapshot);
     248      583950 :     estate->es_top_eflags = eflags;
     249      583950 :     estate->es_instrument = queryDesc->instrument_options;
     250      583950 :     estate->es_jit_flags = queryDesc->plannedstmt->jitFlags;
     251             : 
     252             :     /*
     253             :      * Set up an AFTER-trigger statement context, unless told not to, or
     254             :      * unless it's EXPLAIN-only mode (when ExecutorFinish won't be called).
     255             :      */
     256      583950 :     if (!(eflags & (EXEC_FLAG_SKIP_TRIGGERS | EXEC_FLAG_EXPLAIN_ONLY)))
     257      114618 :         AfterTriggerBeginQuery();
     258             : 
     259             :     /*
     260             :      * Initialize the plan state tree
     261             :      */
     262      583950 :     InitPlan(queryDesc, eflags);
     263             : 
     264      581976 :     MemoryContextSwitchTo(oldcontext);
     265      581976 : }
     266             : 
     267             : /* ----------------------------------------------------------------
     268             :  *      ExecutorRun
     269             :  *
     270             :  *      This is the main routine of the executor module. It accepts
     271             :  *      the query descriptor from the traffic cop and executes the
     272             :  *      query plan.
     273             :  *
     274             :  *      ExecutorStart must have been called already.
     275             :  *
     276             :  *      If direction is NoMovementScanDirection then nothing is done
     277             :  *      except to start up/shut down the destination.  Otherwise,
     278             :  *      we retrieve up to 'count' tuples in the specified direction.
     279             :  *
     280             :  *      Note: count = 0 is interpreted as no portal limit, i.e., run to
     281             :  *      completion.  Also note that the count limit is only applied to
     282             :  *      retrieved tuples, not for instance to those inserted/updated/deleted
     283             :  *      by a ModifyTable plan node.
     284             :  *
     285             :  *      There is no return value, but output tuples (if any) are sent to
     286             :  *      the destination receiver specified in the QueryDesc; and the number
     287             :  *      of tuples processed at the top level can be found in
     288             :  *      estate->es_processed.  The total number of tuples processed in all
     289             :  *      the ExecutorRun calls can be found in estate->es_total_processed.
     290             :  *
     291             :  *      We provide a function hook variable that lets loadable plugins
     292             :  *      get control when ExecutorRun is called.  Such a plugin would
     293             :  *      normally call standard_ExecutorRun().
     294             :  *
     295             :  * ----------------------------------------------------------------
     296             :  */
     297             : void
     298      573942 : ExecutorRun(QueryDesc *queryDesc,
     299             :             ScanDirection direction, uint64 count)
     300             : {
     301      573942 :     if (ExecutorRun_hook)
     302      111856 :         (*ExecutorRun_hook) (queryDesc, direction, count);
     303             :     else
     304      462086 :         standard_ExecutorRun(queryDesc, direction, count);
     305      550306 : }
     306             : 
     307             : void
     308      573942 : standard_ExecutorRun(QueryDesc *queryDesc,
     309             :                      ScanDirection direction, uint64 count)
     310             : {
     311             :     EState     *estate;
     312             :     CmdType     operation;
     313             :     DestReceiver *dest;
     314             :     bool        sendTuples;
     315             :     MemoryContext oldcontext;
     316             : 
     317             :     /* sanity checks */
     318             :     Assert(queryDesc != NULL);
     319             : 
     320      573942 :     estate = queryDesc->estate;
     321             : 
     322             :     Assert(estate != NULL);
     323             :     Assert(!(estate->es_top_eflags & EXEC_FLAG_EXPLAIN_ONLY));
     324             : 
     325             :     /* caller must ensure the query's snapshot is active */
     326             :     Assert(GetActiveSnapshot() == estate->es_snapshot);
     327             : 
     328             :     /*
     329             :      * Switch into per-query memory context
     330             :      */
     331      573942 :     oldcontext = MemoryContextSwitchTo(estate->es_query_cxt);
     332             : 
     333             :     /* Allow instrumentation of Executor overall runtime */
     334      573942 :     if (queryDesc->totaltime)
     335       76284 :         InstrStartNode(queryDesc->totaltime);
     336             : 
     337             :     /*
     338             :      * extract information from the query descriptor and the query feature.
     339             :      */
     340      573942 :     operation = queryDesc->operation;
     341      573942 :     dest = queryDesc->dest;
     342             : 
     343             :     /*
     344             :      * startup tuple receiver, if we will be emitting tuples
     345             :      */
     346      573942 :     estate->es_processed = 0;
     347             : 
     348      687776 :     sendTuples = (operation == CMD_SELECT ||
     349      113834 :                   queryDesc->plannedstmt->hasReturning);
     350             : 
     351      573942 :     if (sendTuples)
     352      464282 :         dest->rStartup(dest, operation, queryDesc->tupDesc);
     353             : 
     354             :     /*
     355             :      * Run plan, unless direction is NoMovement.
     356             :      *
     357             :      * Note: pquery.c selects NoMovement if a prior call already reached
     358             :      * end-of-data in the user-specified fetch direction.  This is important
     359             :      * because various parts of the executor can misbehave if called again
     360             :      * after reporting EOF.  For example, heapam.c would actually restart a
     361             :      * heapscan and return all its data afresh.  There is also some doubt
     362             :      * about whether a parallel plan would operate properly if an additional,
     363             :      * necessarily non-parallel execution request occurs after completing a
     364             :      * parallel execution.  (That case should work, but it's untested.)
     365             :      */
     366      573904 :     if (!ScanDirectionIsNoMovement(direction))
     367      572684 :         ExecutePlan(queryDesc,
     368             :                     operation,
     369             :                     sendTuples,
     370             :                     count,
     371             :                     direction,
     372             :                     dest);
     373             : 
     374             :     /*
     375             :      * Update es_total_processed to keep track of the number of tuples
     376             :      * processed across multiple ExecutorRun() calls.
     377             :      */
     378      550306 :     estate->es_total_processed += estate->es_processed;
     379             : 
     380             :     /*
     381             :      * shutdown tuple receiver, if we started it
     382             :      */
     383      550306 :     if (sendTuples)
     384      443752 :         dest->rShutdown(dest);
     385             : 
     386      550306 :     if (queryDesc->totaltime)
     387       73574 :         InstrStopNode(queryDesc->totaltime, estate->es_processed);
     388             : 
     389      550306 :     MemoryContextSwitchTo(oldcontext);
     390      550306 : }
     391             : 
     392             : /* ----------------------------------------------------------------
     393             :  *      ExecutorFinish
     394             :  *
     395             :  *      This routine must be called after the last ExecutorRun call.
     396             :  *      It performs cleanup such as firing AFTER triggers.  It is
     397             :  *      separate from ExecutorEnd because EXPLAIN ANALYZE needs to
     398             :  *      include these actions in the total runtime.
     399             :  *
     400             :  *      We provide a function hook variable that lets loadable plugins
     401             :  *      get control when ExecutorFinish is called.  Such a plugin would
     402             :  *      normally call standard_ExecutorFinish().
     403             :  *
     404             :  * ----------------------------------------------------------------
     405             :  */
     406             : void
     407      535982 : ExecutorFinish(QueryDesc *queryDesc)
     408             : {
     409      535982 :     if (ExecutorFinish_hook)
     410      101188 :         (*ExecutorFinish_hook) (queryDesc);
     411             :     else
     412      434794 :         standard_ExecutorFinish(queryDesc);
     413      534882 : }
     414             : 
     415             : void
     416      535982 : standard_ExecutorFinish(QueryDesc *queryDesc)
     417             : {
     418             :     EState     *estate;
     419             :     MemoryContext oldcontext;
     420             : 
     421             :     /* sanity checks */
     422             :     Assert(queryDesc != NULL);
     423             : 
     424      535982 :     estate = queryDesc->estate;
     425             : 
     426             :     Assert(estate != NULL);
     427             :     Assert(!(estate->es_top_eflags & EXEC_FLAG_EXPLAIN_ONLY));
     428             : 
     429             :     /* This should be run once and only once per Executor instance */
     430             :     Assert(!estate->es_finished);
     431             : 
     432             :     /* Switch into per-query memory context */
     433      535982 :     oldcontext = MemoryContextSwitchTo(estate->es_query_cxt);
     434             : 
     435             :     /* Allow instrumentation of Executor overall runtime */
     436      535982 :     if (queryDesc->totaltime)
     437       73574 :         InstrStartNode(queryDesc->totaltime);
     438             : 
     439             :     /* Run ModifyTable nodes to completion */
     440      535982 :     ExecPostprocessPlan(estate);
     441             : 
     442             :     /* Execute queued AFTER triggers, unless told not to */
     443      535982 :     if (!(estate->es_top_eflags & EXEC_FLAG_SKIP_TRIGGERS))
     444      110120 :         AfterTriggerEndQuery(estate);
     445             : 
     446      534882 :     if (queryDesc->totaltime)
     447       73252 :         InstrStopNode(queryDesc->totaltime, 0);
     448             : 
     449      534882 :     MemoryContextSwitchTo(oldcontext);
     450             : 
     451      534882 :     estate->es_finished = true;
     452      534882 : }
     453             : 
     454             : /* ----------------------------------------------------------------
     455             :  *      ExecutorEnd
     456             :  *
     457             :  *      This routine must be called at the end of execution of any
     458             :  *      query plan
     459             :  *
     460             :  *      We provide a function hook variable that lets loadable plugins
     461             :  *      get control when ExecutorEnd is called.  Such a plugin would
     462             :  *      normally call standard_ExecutorEnd().
     463             :  *
     464             :  * ----------------------------------------------------------------
     465             :  */
     466             : void
     467      555196 : ExecutorEnd(QueryDesc *queryDesc)
     468             : {
     469      555196 :     if (ExecutorEnd_hook)
     470      106588 :         (*ExecutorEnd_hook) (queryDesc);
     471             :     else
     472      448608 :         standard_ExecutorEnd(queryDesc);
     473      555196 : }
     474             : 
     475             : void
     476      555196 : standard_ExecutorEnd(QueryDesc *queryDesc)
     477             : {
     478             :     EState     *estate;
     479             :     MemoryContext oldcontext;
     480             : 
     481             :     /* sanity checks */
     482             :     Assert(queryDesc != NULL);
     483             : 
     484      555196 :     estate = queryDesc->estate;
     485             : 
     486             :     Assert(estate != NULL);
     487             : 
     488      555196 :     if (estate->es_parallel_workers_to_launch > 0)
     489         682 :         pgstat_update_parallel_workers_stats((PgStat_Counter) estate->es_parallel_workers_to_launch,
     490         682 :                                              (PgStat_Counter) estate->es_parallel_workers_launched);
     491             : 
     492             :     /*
     493             :      * Check that ExecutorFinish was called, unless in EXPLAIN-only mode. This
     494             :      * Assert is needed because ExecutorFinish is new as of 9.1, and callers
     495             :      * might forget to call it.
     496             :      */
     497             :     Assert(estate->es_finished ||
     498             :            (estate->es_top_eflags & EXEC_FLAG_EXPLAIN_ONLY));
     499             : 
     500             :     /*
     501             :      * Switch into per-query memory context to run ExecEndPlan
     502             :      */
     503      555196 :     oldcontext = MemoryContextSwitchTo(estate->es_query_cxt);
     504             : 
     505      555196 :     ExecEndPlan(queryDesc->planstate, estate);
     506             : 
     507             :     /* do away with our snapshots */
     508      555196 :     UnregisterSnapshot(estate->es_snapshot);
     509      555196 :     UnregisterSnapshot(estate->es_crosscheck_snapshot);
     510             : 
     511             :     /*
     512             :      * Must switch out of context before destroying it
     513             :      */
     514      555196 :     MemoryContextSwitchTo(oldcontext);
     515             : 
     516             :     /*
     517             :      * Release EState and per-query memory context.  This should release
     518             :      * everything the executor has allocated.
     519             :      */
     520      555196 :     FreeExecutorState(estate);
     521             : 
     522             :     /* Reset queryDesc fields that no longer point to anything */
     523      555196 :     queryDesc->tupDesc = NULL;
     524      555196 :     queryDesc->estate = NULL;
     525      555196 :     queryDesc->planstate = NULL;
     526      555196 :     queryDesc->totaltime = NULL;
     527      555196 : }
     528             : 
     529             : /* ----------------------------------------------------------------
     530             :  *      ExecutorRewind
     531             :  *
     532             :  *      This routine may be called on an open queryDesc to rewind it
     533             :  *      to the start.
     534             :  * ----------------------------------------------------------------
     535             :  */
     536             : void
     537         104 : ExecutorRewind(QueryDesc *queryDesc)
     538             : {
     539             :     EState     *estate;
     540             :     MemoryContext oldcontext;
     541             : 
     542             :     /* sanity checks */
     543             :     Assert(queryDesc != NULL);
     544             : 
     545         104 :     estate = queryDesc->estate;
     546             : 
     547             :     Assert(estate != NULL);
     548             : 
     549             :     /* It's probably not sensible to rescan updating queries */
     550             :     Assert(queryDesc->operation == CMD_SELECT);
     551             : 
     552             :     /*
     553             :      * Switch into per-query memory context
     554             :      */
     555         104 :     oldcontext = MemoryContextSwitchTo(estate->es_query_cxt);
     556             : 
     557             :     /*
     558             :      * rescan plan
     559             :      */
     560         104 :     ExecReScan(queryDesc->planstate);
     561             : 
     562         104 :     MemoryContextSwitchTo(oldcontext);
     563         104 : }
     564             : 
     565             : 
     566             : /*
     567             :  * ExecCheckPermissions
     568             :  *      Check access permissions of relations mentioned in a query
     569             :  *
     570             :  * Returns true if permissions are adequate.  Otherwise, throws an appropriate
     571             :  * error if ereport_on_violation is true, or simply returns false otherwise.
     572             :  *
     573             :  * Note that this does NOT address row-level security policies (aka: RLS).  If
     574             :  * rows will be returned to the user as a result of this permission check
     575             :  * passing, then RLS also needs to be consulted (and check_enable_rls()).
     576             :  *
     577             :  * See rewrite/rowsecurity.c.
     578             :  *
     579             :  * NB: rangeTable is no longer used by us, but kept around for the hooks that
     580             :  * might still want to look at the RTEs.
     581             :  */
     582             : bool
     583      600880 : ExecCheckPermissions(List *rangeTable, List *rteperminfos,
     584             :                      bool ereport_on_violation)
     585             : {
     586             :     ListCell   *l;
     587      600880 :     bool        result = true;
     588             : 
     589             : #ifdef USE_ASSERT_CHECKING
     590             :     Bitmapset  *indexset = NULL;
     591             : 
     592             :     /* Check that rteperminfos is consistent with rangeTable */
     593             :     foreach(l, rangeTable)
     594             :     {
     595             :         RangeTblEntry *rte = lfirst_node(RangeTblEntry, l);
     596             : 
     597             :         if (rte->perminfoindex != 0)
     598             :         {
     599             :             /* Sanity checks */
     600             : 
     601             :             /*
     602             :              * Only relation RTEs and subquery RTEs that were once relation
     603             :              * RTEs (views) have their perminfoindex set.
     604             :              */
     605             :             Assert(rte->rtekind == RTE_RELATION ||
     606             :                    (rte->rtekind == RTE_SUBQUERY &&
     607             :                     rte->relkind == RELKIND_VIEW));
     608             : 
     609             :             (void) getRTEPermissionInfo(rteperminfos, rte);
     610             :             /* Many-to-one mapping not allowed */
     611             :             Assert(!bms_is_member(rte->perminfoindex, indexset));
     612             :             indexset = bms_add_member(indexset, rte->perminfoindex);
     613             :         }
     614             :     }
     615             : 
     616             :     /* All rteperminfos are referenced */
     617             :     Assert(bms_num_members(indexset) == list_length(rteperminfos));
     618             : #endif
     619             : 
     620     1175892 :     foreach(l, rteperminfos)
     621             :     {
     622      576638 :         RTEPermissionInfo *perminfo = lfirst_node(RTEPermissionInfo, l);
     623             : 
     624             :         Assert(OidIsValid(perminfo->relid));
     625      576638 :         result = ExecCheckOneRelPerms(perminfo);
     626      576638 :         if (!result)
     627             :         {
     628        1626 :             if (ereport_on_violation)
     629        1614 :                 aclcheck_error(ACLCHECK_NO_PRIV,
     630        1614 :                                get_relkind_objtype(get_rel_relkind(perminfo->relid)),
     631        1614 :                                get_rel_name(perminfo->relid));
     632          12 :             return false;
     633             :         }
     634             :     }
     635             : 
     636      599254 :     if (ExecutorCheckPerms_hook)
     637          12 :         result = (*ExecutorCheckPerms_hook) (rangeTable, rteperminfos,
     638             :                                              ereport_on_violation);
     639      599254 :     return result;
     640             : }
     641             : 
     642             : /*
     643             :  * ExecCheckOneRelPerms
     644             :  *      Check access permissions for a single relation.
     645             :  */
     646             : static bool
     647      576638 : ExecCheckOneRelPerms(RTEPermissionInfo *perminfo)
     648             : {
     649             :     AclMode     requiredPerms;
     650             :     AclMode     relPerms;
     651             :     AclMode     remainingPerms;
     652             :     Oid         userid;
     653      576638 :     Oid         relOid = perminfo->relid;
     654             : 
     655      576638 :     requiredPerms = perminfo->requiredPerms;
     656             :     Assert(requiredPerms != 0);
     657             : 
     658             :     /*
     659             :      * userid to check as: current user unless we have a setuid indication.
     660             :      *
     661             :      * Note: GetUserId() is presently fast enough that there's no harm in
     662             :      * calling it separately for each relation.  If that stops being true, we
     663             :      * could call it once in ExecCheckPermissions and pass the userid down
     664             :      * from there.  But for now, no need for the extra clutter.
     665             :      */
     666     1153276 :     userid = OidIsValid(perminfo->checkAsUser) ?
     667      576638 :         perminfo->checkAsUser : GetUserId();
     668             : 
     669             :     /*
     670             :      * We must have *all* the requiredPerms bits, but some of the bits can be
     671             :      * satisfied from column-level rather than relation-level permissions.
     672             :      * First, remove any bits that are satisfied by relation permissions.
     673             :      */
     674      576638 :     relPerms = pg_class_aclmask(relOid, userid, requiredPerms, ACLMASK_ALL);
     675      576638 :     remainingPerms = requiredPerms & ~relPerms;
     676      576638 :     if (remainingPerms != 0)
     677             :     {
     678        2540 :         int         col = -1;
     679             : 
     680             :         /*
     681             :          * If we lack any permissions that exist only as relation permissions,
     682             :          * we can fail straight away.
     683             :          */
     684        2540 :         if (remainingPerms & ~(ACL_SELECT | ACL_INSERT | ACL_UPDATE))
     685         150 :             return false;
     686             : 
     687             :         /*
     688             :          * Check to see if we have the needed privileges at column level.
     689             :          *
     690             :          * Note: failures just report a table-level error; it would be nicer
     691             :          * to report a column-level error if we have some but not all of the
     692             :          * column privileges.
     693             :          */
     694        2390 :         if (remainingPerms & ACL_SELECT)
     695             :         {
     696             :             /*
     697             :              * When the query doesn't explicitly reference any columns (for
     698             :              * example, SELECT COUNT(*) FROM table), allow the query if we
     699             :              * have SELECT on any column of the rel, as per SQL spec.
     700             :              */
     701        1422 :             if (bms_is_empty(perminfo->selectedCols))
     702             :             {
     703          54 :                 if (pg_attribute_aclcheck_all(relOid, userid, ACL_SELECT,
     704             :                                               ACLMASK_ANY) != ACLCHECK_OK)
     705          12 :                     return false;
     706             :             }
     707             : 
     708        2318 :             while ((col = bms_next_member(perminfo->selectedCols, col)) >= 0)
     709             :             {
     710             :                 /* bit #s are offset by FirstLowInvalidHeapAttributeNumber */
     711        1812 :                 AttrNumber  attno = col + FirstLowInvalidHeapAttributeNumber;
     712             : 
     713        1812 :                 if (attno == InvalidAttrNumber)
     714             :                 {
     715             :                     /* Whole-row reference, must have priv on all cols */
     716          54 :                     if (pg_attribute_aclcheck_all(relOid, userid, ACL_SELECT,
     717             :                                                   ACLMASK_ALL) != ACLCHECK_OK)
     718          30 :                         return false;
     719             :                 }
     720             :                 else
     721             :                 {
     722        1758 :                     if (pg_attribute_aclcheck(relOid, attno, userid,
     723             :                                               ACL_SELECT) != ACLCHECK_OK)
     724         874 :                         return false;
     725             :                 }
     726             :             }
     727             :         }
     728             : 
     729             :         /*
     730             :          * Basically the same for the mod columns, for both INSERT and UPDATE
     731             :          * privilege as specified by remainingPerms.
     732             :          */
     733        1474 :         if (remainingPerms & ACL_INSERT &&
     734         308 :             !ExecCheckPermissionsModified(relOid,
     735             :                                           userid,
     736             :                                           perminfo->insertedCols,
     737             :                                           ACL_INSERT))
     738         176 :             return false;
     739             : 
     740        1298 :         if (remainingPerms & ACL_UPDATE &&
     741         876 :             !ExecCheckPermissionsModified(relOid,
     742             :                                           userid,
     743             :                                           perminfo->updatedCols,
     744             :                                           ACL_UPDATE))
     745         384 :             return false;
     746             :     }
     747      575012 :     return true;
     748             : }
     749             : 
     750             : /*
     751             :  * ExecCheckPermissionsModified
     752             :  *      Check INSERT or UPDATE access permissions for a single relation (these
     753             :  *      are processed uniformly).
     754             :  */
     755             : static bool
     756        1184 : ExecCheckPermissionsModified(Oid relOid, Oid userid, Bitmapset *modifiedCols,
     757             :                              AclMode requiredPerms)
     758             : {
     759        1184 :     int         col = -1;
     760             : 
     761             :     /*
     762             :      * When the query doesn't explicitly update any columns, allow the query
     763             :      * if we have permission on any column of the rel.  This is to handle
     764             :      * SELECT FOR UPDATE as well as possible corner cases in UPDATE.
     765             :      */
     766        1184 :     if (bms_is_empty(modifiedCols))
     767             :     {
     768          48 :         if (pg_attribute_aclcheck_all(relOid, userid, requiredPerms,
     769             :                                       ACLMASK_ANY) != ACLCHECK_OK)
     770          48 :             return false;
     771             :     }
     772             : 
     773        1892 :     while ((col = bms_next_member(modifiedCols, col)) >= 0)
     774             :     {
     775             :         /* bit #s are offset by FirstLowInvalidHeapAttributeNumber */
     776        1268 :         AttrNumber  attno = col + FirstLowInvalidHeapAttributeNumber;
     777             : 
     778        1268 :         if (attno == InvalidAttrNumber)
     779             :         {
     780             :             /* whole-row reference can't happen here */
     781           0 :             elog(ERROR, "whole-row update is not implemented");
     782             :         }
     783             :         else
     784             :         {
     785        1268 :             if (pg_attribute_aclcheck(relOid, attno, userid,
     786             :                                       requiredPerms) != ACLCHECK_OK)
     787         512 :                 return false;
     788             :         }
     789             :     }
     790         624 :     return true;
     791             : }
     792             : 
     793             : /*
     794             :  * Check that the query does not imply any writes to non-temp tables;
     795             :  * unless we're in parallel mode, in which case don't even allow writes
     796             :  * to temp tables.
     797             :  *
     798             :  * Note: in a Hot Standby this would need to reject writes to temp
     799             :  * tables just as we do in parallel mode; but an HS standby can't have created
     800             :  * any temp tables in the first place, so no need to check that.
     801             :  */
     802             : static void
     803       73640 : ExecCheckXactReadOnly(PlannedStmt *plannedstmt)
     804             : {
     805             :     ListCell   *l;
     806             : 
     807             :     /*
     808             :      * Fail if write permissions are requested in parallel mode for table
     809             :      * (temp or non-temp), otherwise fail for any non-temp table.
     810             :      */
     811      192684 :     foreach(l, plannedstmt->permInfos)
     812             :     {
     813      119076 :         RTEPermissionInfo *perminfo = lfirst_node(RTEPermissionInfo, l);
     814             : 
     815      119076 :         if ((perminfo->requiredPerms & (~ACL_SELECT)) == 0)
     816      119032 :             continue;
     817             : 
     818          44 :         if (isTempNamespace(get_rel_namespace(perminfo->relid)))
     819          12 :             continue;
     820             : 
     821          32 :         PreventCommandIfReadOnly(CreateCommandName((Node *) plannedstmt));
     822             :     }
     823             : 
     824       73608 :     if (plannedstmt->commandType != CMD_SELECT || plannedstmt->hasModifyingCTE)
     825          12 :         PreventCommandIfParallelMode(CreateCommandName((Node *) plannedstmt));
     826       73608 : }
     827             : 
     828             : 
     829             : /* ----------------------------------------------------------------
     830             :  *      InitPlan
     831             :  *
     832             :  *      Initializes the query plan: open files, allocate storage
     833             :  *      and start up the rule manager
     834             :  * ----------------------------------------------------------------
     835             :  */
     836             : static void
     837      583950 : InitPlan(QueryDesc *queryDesc, int eflags)
     838             : {
     839      583950 :     CmdType     operation = queryDesc->operation;
     840      583950 :     PlannedStmt *plannedstmt = queryDesc->plannedstmt;
     841      583950 :     Plan       *plan = plannedstmt->planTree;
     842      583950 :     List       *rangeTable = plannedstmt->rtable;
     843      583950 :     EState     *estate = queryDesc->estate;
     844             :     PlanState  *planstate;
     845             :     TupleDesc   tupType;
     846             :     ListCell   *l;
     847             :     int         i;
     848             : 
     849             :     /*
     850             :      * Do permissions checks
     851             :      */
     852      583950 :     ExecCheckPermissions(rangeTable, plannedstmt->permInfos, true);
     853             : 
     854             :     /*
     855             :      * initialize the node's execution state
     856             :      */
     857      582420 :     ExecInitRangeTable(estate, rangeTable, plannedstmt->permInfos,
     858      582420 :                        bms_copy(plannedstmt->unprunableRelids));
     859             : 
     860      582420 :     estate->es_plannedstmt = plannedstmt;
     861      582420 :     estate->es_part_prune_infos = plannedstmt->partPruneInfos;
     862             : 
     863             :     /*
     864             :      * Perform runtime "initial" pruning to identify which child subplans,
     865             :      * corresponding to the children of plan nodes that contain
     866             :      * PartitionPruneInfo such as Append, will not be executed. The results,
     867             :      * which are bitmapsets of indexes of the child subplans that will be
     868             :      * executed, are saved in es_part_prune_results.  These results correspond
     869             :      * to each PartitionPruneInfo entry, and the es_part_prune_results list is
     870             :      * parallel to es_part_prune_infos.
     871             :      */
     872      582420 :     ExecDoInitialPruning(estate);
     873             : 
     874             :     /*
     875             :      * Next, build the ExecRowMark array from the PlanRowMark(s), if any.
     876             :      */
     877      582420 :     if (plannedstmt->rowMarks)
     878             :     {
     879       10006 :         estate->es_rowmarks = (ExecRowMark **)
     880       10006 :             palloc0(estate->es_range_table_size * sizeof(ExecRowMark *));
     881       23376 :         foreach(l, plannedstmt->rowMarks)
     882             :         {
     883       13376 :             PlanRowMark *rc = (PlanRowMark *) lfirst(l);
     884             :             Oid         relid;
     885             :             Relation    relation;
     886             :             ExecRowMark *erm;
     887             : 
     888             :             /*
     889             :              * Ignore "parent" rowmarks, because they are irrelevant at
     890             :              * runtime.  Also ignore the rowmarks belonging to child tables
     891             :              * that have been pruned in ExecDoInitialPruning().
     892             :              */
     893       13376 :             if (rc->isParent ||
     894       11466 :                 !bms_is_member(rc->rti, estate->es_unpruned_relids))
     895        2438 :                 continue;
     896             : 
     897             :             /* get relation's OID (will produce InvalidOid if subquery) */
     898       10938 :             relid = exec_rt_fetch(rc->rti, estate)->relid;
     899             : 
     900             :             /* open relation, if we need to access it for this mark type */
     901       10938 :             switch (rc->markType)
     902             :             {
     903       10614 :                 case ROW_MARK_EXCLUSIVE:
     904             :                 case ROW_MARK_NOKEYEXCLUSIVE:
     905             :                 case ROW_MARK_SHARE:
     906             :                 case ROW_MARK_KEYSHARE:
     907             :                 case ROW_MARK_REFERENCE:
     908       10614 :                     relation = ExecGetRangeTableRelation(estate, rc->rti, false);
     909       10614 :                     break;
     910         324 :                 case ROW_MARK_COPY:
     911             :                     /* no physical table access is required */
     912         324 :                     relation = NULL;
     913         324 :                     break;
     914           0 :                 default:
     915           0 :                     elog(ERROR, "unrecognized markType: %d", rc->markType);
     916             :                     relation = NULL;    /* keep compiler quiet */
     917             :                     break;
     918             :             }
     919             : 
     920             :             /* Check that relation is a legal target for marking */
     921       10938 :             if (relation)
     922       10614 :                 CheckValidRowMarkRel(relation, rc->markType);
     923             : 
     924       10932 :             erm = (ExecRowMark *) palloc(sizeof(ExecRowMark));
     925       10932 :             erm->relation = relation;
     926       10932 :             erm->relid = relid;
     927       10932 :             erm->rti = rc->rti;
     928       10932 :             erm->prti = rc->prti;
     929       10932 :             erm->rowmarkId = rc->rowmarkId;
     930       10932 :             erm->markType = rc->markType;
     931       10932 :             erm->strength = rc->strength;
     932       10932 :             erm->waitPolicy = rc->waitPolicy;
     933       10932 :             erm->ermActive = false;
     934       10932 :             ItemPointerSetInvalid(&(erm->curCtid));
     935       10932 :             erm->ermExtra = NULL;
     936             : 
     937             :             Assert(erm->rti > 0 && erm->rti <= estate->es_range_table_size &&
     938             :                    estate->es_rowmarks[erm->rti - 1] == NULL);
     939             : 
     940       10932 :             estate->es_rowmarks[erm->rti - 1] = erm;
     941             :         }
     942             :     }
     943             : 
     944             :     /*
     945             :      * Initialize the executor's tuple table to empty.
     946             :      */
     947      582414 :     estate->es_tupleTable = NIL;
     948             : 
     949             :     /* signal that this EState is not used for EPQ */
     950      582414 :     estate->es_epq_active = NULL;
     951             : 
     952             :     /*
     953             :      * Initialize private state information for each SubPlan.  We must do this
     954             :      * before running ExecInitNode on the main query tree, since
     955             :      * ExecInitSubPlan expects to be able to find these entries.
     956             :      */
     957             :     Assert(estate->es_subplanstates == NIL);
     958      582414 :     i = 1;                      /* subplan indices count from 1 */
     959      629602 :     foreach(l, plannedstmt->subplans)
     960             :     {
     961       47188 :         Plan       *subplan = (Plan *) lfirst(l);
     962             :         PlanState  *subplanstate;
     963             :         int         sp_eflags;
     964             : 
     965             :         /*
     966             :          * A subplan will never need to do BACKWARD scan nor MARK/RESTORE. If
     967             :          * it is a parameterless subplan (not initplan), we suggest that it be
     968             :          * prepared to handle REWIND efficiently; otherwise there is no need.
     969             :          */
     970       47188 :         sp_eflags = eflags
     971             :             & ~(EXEC_FLAG_REWIND | EXEC_FLAG_BACKWARD | EXEC_FLAG_MARK);
     972       47188 :         if (bms_is_member(i, plannedstmt->rewindPlanIDs))
     973          42 :             sp_eflags |= EXEC_FLAG_REWIND;
     974             : 
     975       47188 :         subplanstate = ExecInitNode(subplan, estate, sp_eflags);
     976             : 
     977       47188 :         estate->es_subplanstates = lappend(estate->es_subplanstates,
     978             :                                            subplanstate);
     979             : 
     980       47188 :         i++;
     981             :     }
     982             : 
     983             :     /*
     984             :      * Initialize the private state information for all the nodes in the query
     985             :      * tree.  This opens files, allocates storage and leaves us ready to start
     986             :      * processing tuples.
     987             :      */
     988      582414 :     planstate = ExecInitNode(plan, estate, eflags);
     989             : 
     990             :     /*
     991             :      * Get the tuple descriptor describing the type of tuples to return.
     992             :      */
     993      581976 :     tupType = ExecGetResultType(planstate);
     994             : 
     995             :     /*
     996             :      * Initialize the junk filter if needed.  SELECT queries need a filter if
     997             :      * there are any junk attrs in the top-level tlist.
     998             :      */
     999      581976 :     if (operation == CMD_SELECT)
    1000             :     {
    1001      467136 :         bool        junk_filter_needed = false;
    1002             :         ListCell   *tlist;
    1003             : 
    1004     1785864 :         foreach(tlist, plan->targetlist)
    1005             :         {
    1006     1344052 :             TargetEntry *tle = (TargetEntry *) lfirst(tlist);
    1007             : 
    1008     1344052 :             if (tle->resjunk)
    1009             :             {
    1010       25324 :                 junk_filter_needed = true;
    1011       25324 :                 break;
    1012             :             }
    1013             :         }
    1014             : 
    1015      467136 :         if (junk_filter_needed)
    1016             :         {
    1017             :             JunkFilter *j;
    1018             :             TupleTableSlot *slot;
    1019             : 
    1020       25324 :             slot = ExecInitExtraTupleSlot(estate, NULL, &TTSOpsVirtual);
    1021       25324 :             j = ExecInitJunkFilter(planstate->plan->targetlist,
    1022             :                                    slot);
    1023       25324 :             estate->es_junkFilter = j;
    1024             : 
    1025             :             /* Want to return the cleaned tuple type */
    1026       25324 :             tupType = j->jf_cleanTupType;
    1027             :         }
    1028             :     }
    1029             : 
    1030      581976 :     queryDesc->tupDesc = tupType;
    1031      581976 :     queryDesc->planstate = planstate;
    1032      581976 : }
    1033             : 
    1034             : /*
    1035             :  * Check that a proposed result relation is a legal target for the operation
    1036             :  *
    1037             :  * Generally the parser and/or planner should have noticed any such mistake
    1038             :  * already, but let's make sure.
    1039             :  *
    1040             :  * For MERGE, mergeActions is the list of actions that may be performed.  The
    1041             :  * result relation is required to support every action, regardless of whether
    1042             :  * or not they are all executed.
    1043             :  *
    1044             :  * Note: when changing this function, you probably also need to look at
    1045             :  * CheckValidRowMarkRel.
    1046             :  */
    1047             : void
    1048      127608 : CheckValidResultRel(ResultRelInfo *resultRelInfo, CmdType operation,
    1049             :                     List *mergeActions)
    1050             : {
    1051      127608 :     Relation    resultRel = resultRelInfo->ri_RelationDesc;
    1052             :     FdwRoutine *fdwroutine;
    1053             : 
    1054             :     /* Expect a fully-formed ResultRelInfo from InitResultRelInfo(). */
    1055             :     Assert(resultRelInfo->ri_needLockTagTuple ==
    1056             :            IsInplaceUpdateRelation(resultRel));
    1057             : 
    1058      127608 :     switch (resultRel->rd_rel->relkind)
    1059             :     {
    1060      126400 :         case RELKIND_RELATION:
    1061             :         case RELKIND_PARTITIONED_TABLE:
    1062      126400 :             CheckCmdReplicaIdentity(resultRel, operation);
    1063      126092 :             break;
    1064           0 :         case RELKIND_SEQUENCE:
    1065           0 :             ereport(ERROR,
    1066             :                     (errcode(ERRCODE_WRONG_OBJECT_TYPE),
    1067             :                      errmsg("cannot change sequence \"%s\"",
    1068             :                             RelationGetRelationName(resultRel))));
    1069             :             break;
    1070           0 :         case RELKIND_TOASTVALUE:
    1071           0 :             ereport(ERROR,
    1072             :                     (errcode(ERRCODE_WRONG_OBJECT_TYPE),
    1073             :                      errmsg("cannot change TOAST relation \"%s\"",
    1074             :                             RelationGetRelationName(resultRel))));
    1075             :             break;
    1076         420 :         case RELKIND_VIEW:
    1077             : 
    1078             :             /*
    1079             :              * Okay only if there's a suitable INSTEAD OF trigger.  Otherwise,
    1080             :              * complain, but omit errdetail because we haven't got the
    1081             :              * information handy (and given that it really shouldn't happen,
    1082             :              * it's not worth great exertion to get).
    1083             :              */
    1084         420 :             if (!view_has_instead_trigger(resultRel, operation, mergeActions))
    1085           0 :                 error_view_not_updatable(resultRel, operation, mergeActions,
    1086             :                                          NULL);
    1087         420 :             break;
    1088         120 :         case RELKIND_MATVIEW:
    1089         120 :             if (!MatViewIncrementalMaintenanceIsEnabled())
    1090           0 :                 ereport(ERROR,
    1091             :                         (errcode(ERRCODE_WRONG_OBJECT_TYPE),
    1092             :                          errmsg("cannot change materialized view \"%s\"",
    1093             :                                 RelationGetRelationName(resultRel))));
    1094         120 :             break;
    1095         668 :         case RELKIND_FOREIGN_TABLE:
    1096             :             /* Okay only if the FDW supports it */
    1097         668 :             fdwroutine = resultRelInfo->ri_FdwRoutine;
    1098             :             switch (operation)
    1099             :             {
    1100         304 :                 case CMD_INSERT:
    1101         304 :                     if (fdwroutine->ExecForeignInsert == NULL)
    1102          10 :                         ereport(ERROR,
    1103             :                                 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
    1104             :                                  errmsg("cannot insert into foreign table \"%s\"",
    1105             :                                         RelationGetRelationName(resultRel))));
    1106         294 :                     if (fdwroutine->IsForeignRelUpdatable != NULL &&
    1107         294 :                         (fdwroutine->IsForeignRelUpdatable(resultRel) & (1 << CMD_INSERT)) == 0)
    1108           0 :                         ereport(ERROR,
    1109             :                                 (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
    1110             :                                  errmsg("foreign table \"%s\" does not allow inserts",
    1111             :                                         RelationGetRelationName(resultRel))));
    1112         294 :                     break;
    1113         206 :                 case CMD_UPDATE:
    1114         206 :                     if (fdwroutine->ExecForeignUpdate == NULL)
    1115           4 :                         ereport(ERROR,
    1116             :                                 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
    1117             :                                  errmsg("cannot update foreign table \"%s\"",
    1118             :                                         RelationGetRelationName(resultRel))));
    1119         202 :                     if (fdwroutine->IsForeignRelUpdatable != NULL &&
    1120         202 :                         (fdwroutine->IsForeignRelUpdatable(resultRel) & (1 << CMD_UPDATE)) == 0)
    1121           0 :                         ereport(ERROR,
    1122             :                                 (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
    1123             :                                  errmsg("foreign table \"%s\" does not allow updates",
    1124             :                                         RelationGetRelationName(resultRel))));
    1125         202 :                     break;
    1126         158 :                 case CMD_DELETE:
    1127         158 :                     if (fdwroutine->ExecForeignDelete == NULL)
    1128           4 :                         ereport(ERROR,
    1129             :                                 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
    1130             :                                  errmsg("cannot delete from foreign table \"%s\"",
    1131             :                                         RelationGetRelationName(resultRel))));
    1132         154 :                     if (fdwroutine->IsForeignRelUpdatable != NULL &&
    1133         154 :                         (fdwroutine->IsForeignRelUpdatable(resultRel) & (1 << CMD_DELETE)) == 0)
    1134           0 :                         ereport(ERROR,
    1135             :                                 (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
    1136             :                                  errmsg("foreign table \"%s\" does not allow deletes",
    1137             :                                         RelationGetRelationName(resultRel))));
    1138         154 :                     break;
    1139           0 :                 default:
    1140           0 :                     elog(ERROR, "unrecognized CmdType: %d", (int) operation);
    1141             :                     break;
    1142             :             }
    1143         650 :             break;
    1144           0 :         default:
    1145           0 :             ereport(ERROR,
    1146             :                     (errcode(ERRCODE_WRONG_OBJECT_TYPE),
    1147             :                      errmsg("cannot change relation \"%s\"",
    1148             :                             RelationGetRelationName(resultRel))));
    1149             :             break;
    1150             :     }
    1151      127282 : }
    1152             : 
    1153             : /*
    1154             :  * Check that a proposed rowmark target relation is a legal target
    1155             :  *
    1156             :  * In most cases parser and/or planner should have noticed this already, but
    1157             :  * they don't cover all cases.
    1158             :  */
    1159             : static void
    1160       10614 : CheckValidRowMarkRel(Relation rel, RowMarkType markType)
    1161             : {
    1162             :     FdwRoutine *fdwroutine;
    1163             : 
    1164       10614 :     switch (rel->rd_rel->relkind)
    1165             :     {
    1166       10602 :         case RELKIND_RELATION:
    1167             :         case RELKIND_PARTITIONED_TABLE:
    1168             :             /* OK */
    1169       10602 :             break;
    1170           0 :         case RELKIND_SEQUENCE:
    1171             :             /* Must disallow this because we don't vacuum sequences */
    1172           0 :             ereport(ERROR,
    1173             :                     (errcode(ERRCODE_WRONG_OBJECT_TYPE),
    1174             :                      errmsg("cannot lock rows in sequence \"%s\"",
    1175             :                             RelationGetRelationName(rel))));
    1176             :             break;
    1177           0 :         case RELKIND_TOASTVALUE:
    1178             :             /* We could allow this, but there seems no good reason to */
    1179           0 :             ereport(ERROR,
    1180             :                     (errcode(ERRCODE_WRONG_OBJECT_TYPE),
    1181             :                      errmsg("cannot lock rows in TOAST relation \"%s\"",
    1182             :                             RelationGetRelationName(rel))));
    1183             :             break;
    1184           0 :         case RELKIND_VIEW:
    1185             :             /* Should not get here; planner should have expanded the view */
    1186           0 :             ereport(ERROR,
    1187             :                     (errcode(ERRCODE_WRONG_OBJECT_TYPE),
    1188             :                      errmsg("cannot lock rows in view \"%s\"",
    1189             :                             RelationGetRelationName(rel))));
    1190             :             break;
    1191          12 :         case RELKIND_MATVIEW:
    1192             :             /* Allow referencing a matview, but not actual locking clauses */
    1193          12 :             if (markType != ROW_MARK_REFERENCE)
    1194           6 :                 ereport(ERROR,
    1195             :                         (errcode(ERRCODE_WRONG_OBJECT_TYPE),
    1196             :                          errmsg("cannot lock rows in materialized view \"%s\"",
    1197             :                                 RelationGetRelationName(rel))));
    1198           6 :             break;
    1199           0 :         case RELKIND_FOREIGN_TABLE:
    1200             :             /* Okay only if the FDW supports it */
    1201           0 :             fdwroutine = GetFdwRoutineForRelation(rel, false);
    1202           0 :             if (fdwroutine->RefetchForeignRow == NULL)
    1203           0 :                 ereport(ERROR,
    1204             :                         (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
    1205             :                          errmsg("cannot lock rows in foreign table \"%s\"",
    1206             :                                 RelationGetRelationName(rel))));
    1207           0 :             break;
    1208           0 :         default:
    1209           0 :             ereport(ERROR,
    1210             :                     (errcode(ERRCODE_WRONG_OBJECT_TYPE),
    1211             :                      errmsg("cannot lock rows in relation \"%s\"",
    1212             :                             RelationGetRelationName(rel))));
    1213             :             break;
    1214             :     }
    1215       10608 : }
    1216             : 
    1217             : /*
    1218             :  * Initialize ResultRelInfo data for one result relation
    1219             :  *
    1220             :  * Caution: before Postgres 9.1, this function included the relkind checking
    1221             :  * that's now in CheckValidResultRel, and it also did ExecOpenIndices if
    1222             :  * appropriate.  Be sure callers cover those needs.
    1223             :  */
    1224             : void
    1225      433654 : InitResultRelInfo(ResultRelInfo *resultRelInfo,
    1226             :                   Relation resultRelationDesc,
    1227             :                   Index resultRelationIndex,
    1228             :                   ResultRelInfo *partition_root_rri,
    1229             :                   int instrument_options)
    1230             : {
    1231    22116354 :     MemSet(resultRelInfo, 0, sizeof(ResultRelInfo));
    1232      433654 :     resultRelInfo->type = T_ResultRelInfo;
    1233      433654 :     resultRelInfo->ri_RangeTableIndex = resultRelationIndex;
    1234      433654 :     resultRelInfo->ri_RelationDesc = resultRelationDesc;
    1235      433654 :     resultRelInfo->ri_NumIndices = 0;
    1236      433654 :     resultRelInfo->ri_IndexRelationDescs = NULL;
    1237      433654 :     resultRelInfo->ri_IndexRelationInfo = NULL;
    1238      433654 :     resultRelInfo->ri_needLockTagTuple =
    1239      433654 :         IsInplaceUpdateRelation(resultRelationDesc);
    1240             :     /* make a copy so as not to depend on relcache info not changing... */
    1241      433654 :     resultRelInfo->ri_TrigDesc = CopyTriggerDesc(resultRelationDesc->trigdesc);
    1242      433654 :     if (resultRelInfo->ri_TrigDesc)
    1243             :     {
    1244       17186 :         int         n = resultRelInfo->ri_TrigDesc->numtriggers;
    1245             : 
    1246       17186 :         resultRelInfo->ri_TrigFunctions = (FmgrInfo *)
    1247       17186 :             palloc0(n * sizeof(FmgrInfo));
    1248       17186 :         resultRelInfo->ri_TrigWhenExprs = (ExprState **)
    1249       17186 :             palloc0(n * sizeof(ExprState *));
    1250       17186 :         if (instrument_options)
    1251           0 :             resultRelInfo->ri_TrigInstrument = InstrAlloc(n, instrument_options, false);
    1252             :     }
    1253             :     else
    1254             :     {
    1255      416468 :         resultRelInfo->ri_TrigFunctions = NULL;
    1256      416468 :         resultRelInfo->ri_TrigWhenExprs = NULL;
    1257      416468 :         resultRelInfo->ri_TrigInstrument = NULL;
    1258             :     }
    1259      433654 :     if (resultRelationDesc->rd_rel->relkind == RELKIND_FOREIGN_TABLE)
    1260         690 :         resultRelInfo->ri_FdwRoutine = GetFdwRoutineForRelation(resultRelationDesc, true);
    1261             :     else
    1262      432964 :         resultRelInfo->ri_FdwRoutine = NULL;
    1263             : 
    1264             :     /* The following fields are set later if needed */
    1265      433654 :     resultRelInfo->ri_RowIdAttNo = 0;
    1266      433654 :     resultRelInfo->ri_extraUpdatedCols = NULL;
    1267      433654 :     resultRelInfo->ri_projectNew = NULL;
    1268      433654 :     resultRelInfo->ri_newTupleSlot = NULL;
    1269      433654 :     resultRelInfo->ri_oldTupleSlot = NULL;
    1270      433654 :     resultRelInfo->ri_projectNewInfoValid = false;
    1271      433654 :     resultRelInfo->ri_FdwState = NULL;
    1272      433654 :     resultRelInfo->ri_usesFdwDirectModify = false;
    1273      433654 :     resultRelInfo->ri_CheckConstraintExprs = NULL;
    1274      433654 :     resultRelInfo->ri_GenVirtualNotNullConstraintExprs = NULL;
    1275      433654 :     resultRelInfo->ri_GeneratedExprsI = NULL;
    1276      433654 :     resultRelInfo->ri_GeneratedExprsU = NULL;
    1277      433654 :     resultRelInfo->ri_projectReturning = NULL;
    1278      433654 :     resultRelInfo->ri_onConflictArbiterIndexes = NIL;
    1279      433654 :     resultRelInfo->ri_onConflict = NULL;
    1280      433654 :     resultRelInfo->ri_ReturningSlot = NULL;
    1281      433654 :     resultRelInfo->ri_TrigOldSlot = NULL;
    1282      433654 :     resultRelInfo->ri_TrigNewSlot = NULL;
    1283      433654 :     resultRelInfo->ri_AllNullSlot = NULL;
    1284      433654 :     resultRelInfo->ri_MergeActions[MERGE_WHEN_MATCHED] = NIL;
    1285      433654 :     resultRelInfo->ri_MergeActions[MERGE_WHEN_NOT_MATCHED_BY_SOURCE] = NIL;
    1286      433654 :     resultRelInfo->ri_MergeActions[MERGE_WHEN_NOT_MATCHED_BY_TARGET] = NIL;
    1287      433654 :     resultRelInfo->ri_MergeJoinCondition = NULL;
    1288             : 
    1289             :     /*
    1290             :      * Only ExecInitPartitionInfo() and ExecInitPartitionDispatchInfo() pass
    1291             :      * non-NULL partition_root_rri.  For child relations that are part of the
    1292             :      * initial query rather than being dynamically added by tuple routing,
    1293             :      * this field is filled in ExecInitModifyTable().
    1294             :      */
    1295      433654 :     resultRelInfo->ri_RootResultRelInfo = partition_root_rri;
    1296             :     /* Set by ExecGetRootToChildMap */
    1297      433654 :     resultRelInfo->ri_RootToChildMap = NULL;
    1298      433654 :     resultRelInfo->ri_RootToChildMapValid = false;
    1299             :     /* Set by ExecInitRoutingInfo */
    1300      433654 :     resultRelInfo->ri_PartitionTupleSlot = NULL;
    1301      433654 :     resultRelInfo->ri_ChildToRootMap = NULL;
    1302      433654 :     resultRelInfo->ri_ChildToRootMapValid = false;
    1303      433654 :     resultRelInfo->ri_CopyMultiInsertBuffer = NULL;
    1304      433654 : }
    1305             : 
    1306             : /*
    1307             :  * ExecGetTriggerResultRel
    1308             :  *      Get a ResultRelInfo for a trigger target relation.
    1309             :  *
    1310             :  * Most of the time, triggers are fired on one of the result relations of the
    1311             :  * query, and so we can just return a member of the es_result_relations array,
    1312             :  * or the es_tuple_routing_result_relations list (if any). (Note: in self-join
    1313             :  * situations there might be multiple members with the same OID; if so it
    1314             :  * doesn't matter which one we pick.)
    1315             :  *
    1316             :  * However, it is sometimes necessary to fire triggers on other relations;
    1317             :  * this happens mainly when an RI update trigger queues additional triggers
    1318             :  * on other relations, which will be processed in the context of the outer
    1319             :  * query.  For efficiency's sake, we want to have a ResultRelInfo for those
    1320             :  * triggers too; that can avoid repeated re-opening of the relation.  (It
    1321             :  * also provides a way for EXPLAIN ANALYZE to report the runtimes of such
    1322             :  * triggers.)  So we make additional ResultRelInfo's as needed, and save them
    1323             :  * in es_trig_target_relations.
    1324             :  */
    1325             : ResultRelInfo *
    1326        8162 : ExecGetTriggerResultRel(EState *estate, Oid relid,
    1327             :                         ResultRelInfo *rootRelInfo)
    1328             : {
    1329             :     ResultRelInfo *rInfo;
    1330             :     ListCell   *l;
    1331             :     Relation    rel;
    1332             :     MemoryContext oldcontext;
    1333             : 
    1334             :     /* Search through the query result relations */
    1335       10402 :     foreach(l, estate->es_opened_result_relations)
    1336             :     {
    1337        8948 :         rInfo = lfirst(l);
    1338        8948 :         if (RelationGetRelid(rInfo->ri_RelationDesc) == relid)
    1339        6708 :             return rInfo;
    1340             :     }
    1341             : 
    1342             :     /*
    1343             :      * Search through the result relations that were created during tuple
    1344             :      * routing, if any.
    1345             :      */
    1346        1668 :     foreach(l, estate->es_tuple_routing_result_relations)
    1347             :     {
    1348         910 :         rInfo = (ResultRelInfo *) lfirst(l);
    1349         910 :         if (RelationGetRelid(rInfo->ri_RelationDesc) == relid)
    1350         696 :             return rInfo;
    1351             :     }
    1352             : 
    1353             :     /* Nope, but maybe we already made an extra ResultRelInfo for it */
    1354        1100 :     foreach(l, estate->es_trig_target_relations)
    1355             :     {
    1356         372 :         rInfo = (ResultRelInfo *) lfirst(l);
    1357         372 :         if (RelationGetRelid(rInfo->ri_RelationDesc) == relid)
    1358          30 :             return rInfo;
    1359             :     }
    1360             :     /* Nope, so we need a new one */
    1361             : 
    1362             :     /*
    1363             :      * Open the target relation's relcache entry.  We assume that an
    1364             :      * appropriate lock is still held by the backend from whenever the trigger
    1365             :      * event got queued, so we need take no new lock here.  Also, we need not
    1366             :      * recheck the relkind, so no need for CheckValidResultRel.
    1367             :      */
    1368         728 :     rel = table_open(relid, NoLock);
    1369             : 
    1370             :     /*
    1371             :      * Make the new entry in the right context.
    1372             :      */
    1373         728 :     oldcontext = MemoryContextSwitchTo(estate->es_query_cxt);
    1374         728 :     rInfo = makeNode(ResultRelInfo);
    1375         728 :     InitResultRelInfo(rInfo,
    1376             :                       rel,
    1377             :                       0,        /* dummy rangetable index */
    1378             :                       rootRelInfo,
    1379             :                       estate->es_instrument);
    1380         728 :     estate->es_trig_target_relations =
    1381         728 :         lappend(estate->es_trig_target_relations, rInfo);
    1382         728 :     MemoryContextSwitchTo(oldcontext);
    1383             : 
    1384             :     /*
    1385             :      * Currently, we don't need any index information in ResultRelInfos used
    1386             :      * only for triggers, so no need to call ExecOpenIndices.
    1387             :      */
    1388             : 
    1389         728 :     return rInfo;
    1390             : }
    1391             : 
    1392             : /*
    1393             :  * Return the ancestor relations of a given leaf partition result relation
    1394             :  * up to and including the query's root target relation.
    1395             :  *
    1396             :  * These work much like the ones opened by ExecGetTriggerResultRel, except
    1397             :  * that we need to keep them in a separate list.
    1398             :  *
    1399             :  * These are closed by ExecCloseResultRelations.
    1400             :  */
    1401             : List *
    1402         300 : ExecGetAncestorResultRels(EState *estate, ResultRelInfo *resultRelInfo)
    1403             : {
    1404         300 :     ResultRelInfo *rootRelInfo = resultRelInfo->ri_RootResultRelInfo;
    1405         300 :     Relation    partRel = resultRelInfo->ri_RelationDesc;
    1406             :     Oid         rootRelOid;
    1407             : 
    1408         300 :     if (!partRel->rd_rel->relispartition)
    1409           0 :         elog(ERROR, "cannot find ancestors of a non-partition result relation");
    1410             :     Assert(rootRelInfo != NULL);
    1411         300 :     rootRelOid = RelationGetRelid(rootRelInfo->ri_RelationDesc);
    1412         300 :     if (resultRelInfo->ri_ancestorResultRels == NIL)
    1413             :     {
    1414             :         ListCell   *lc;
    1415         234 :         List       *oids = get_partition_ancestors(RelationGetRelid(partRel));
    1416         234 :         List       *ancResultRels = NIL;
    1417             : 
    1418         300 :         foreach(lc, oids)
    1419             :         {
    1420         300 :             Oid         ancOid = lfirst_oid(lc);
    1421             :             Relation    ancRel;
    1422             :             ResultRelInfo *rInfo;
    1423             : 
    1424             :             /*
    1425             :              * Ignore the root ancestor here, and use ri_RootResultRelInfo
    1426             :              * (below) for it instead.  Also, we stop climbing up the
    1427             :              * hierarchy when we find the table that was mentioned in the
    1428             :              * query.
    1429             :              */
    1430         300 :             if (ancOid == rootRelOid)
    1431         234 :                 break;
    1432             : 
    1433             :             /*
    1434             :              * All ancestors up to the root target relation must have been
    1435             :              * locked by the planner or AcquireExecutorLocks().
    1436             :              */
    1437          66 :             ancRel = table_open(ancOid, NoLock);
    1438          66 :             rInfo = makeNode(ResultRelInfo);
    1439             : 
    1440             :             /* dummy rangetable index */
    1441          66 :             InitResultRelInfo(rInfo, ancRel, 0, NULL,
    1442             :                               estate->es_instrument);
    1443          66 :             ancResultRels = lappend(ancResultRels, rInfo);
    1444             :         }
    1445         234 :         ancResultRels = lappend(ancResultRels, rootRelInfo);
    1446         234 :         resultRelInfo->ri_ancestorResultRels = ancResultRels;
    1447             :     }
    1448             : 
    1449             :     /* We must have found some ancestor */
    1450             :     Assert(resultRelInfo->ri_ancestorResultRels != NIL);
    1451             : 
    1452         300 :     return resultRelInfo->ri_ancestorResultRels;
    1453             : }
    1454             : 
    1455             : /* ----------------------------------------------------------------
    1456             :  *      ExecPostprocessPlan
    1457             :  *
    1458             :  *      Give plan nodes a final chance to execute before shutdown
    1459             :  * ----------------------------------------------------------------
    1460             :  */
    1461             : static void
    1462      535982 : ExecPostprocessPlan(EState *estate)
    1463             : {
    1464             :     ListCell   *lc;
    1465             : 
    1466             :     /*
    1467             :      * Make sure nodes run forward.
    1468             :      */
    1469      535982 :     estate->es_direction = ForwardScanDirection;
    1470             : 
    1471             :     /*
    1472             :      * Run any secondary ModifyTable nodes to completion, in case the main
    1473             :      * query did not fetch all rows from them.  (We do this to ensure that
    1474             :      * such nodes have predictable results.)
    1475             :      */
    1476      536826 :     foreach(lc, estate->es_auxmodifytables)
    1477             :     {
    1478         844 :         PlanState  *ps = (PlanState *) lfirst(lc);
    1479             : 
    1480             :         for (;;)
    1481         138 :         {
    1482             :             TupleTableSlot *slot;
    1483             : 
    1484             :             /* Reset the per-output-tuple exprcontext each time */
    1485         982 :             ResetPerTupleExprContext(estate);
    1486             : 
    1487         982 :             slot = ExecProcNode(ps);
    1488             : 
    1489         982 :             if (TupIsNull(slot))
    1490             :                 break;
    1491             :         }
    1492             :     }
    1493      535982 : }
    1494             : 
    1495             : /* ----------------------------------------------------------------
    1496             :  *      ExecEndPlan
    1497             :  *
    1498             :  *      Cleans up the query plan -- closes files and frees up storage
    1499             :  *
    1500             :  * NOTE: we are no longer very worried about freeing storage per se
    1501             :  * in this code; FreeExecutorState should be guaranteed to release all
    1502             :  * memory that needs to be released.  What we are worried about doing
    1503             :  * is closing relations and dropping buffer pins.  Thus, for example,
    1504             :  * tuple tables must be cleared or dropped to ensure pins are released.
    1505             :  * ----------------------------------------------------------------
    1506             :  */
    1507             : static void
    1508      555196 : ExecEndPlan(PlanState *planstate, EState *estate)
    1509             : {
    1510             :     ListCell   *l;
    1511             : 
    1512             :     /*
    1513             :      * shut down the node-type-specific query processing
    1514             :      */
    1515      555196 :     ExecEndNode(planstate);
    1516             : 
    1517             :     /*
    1518             :      * for subplans too
    1519             :      */
    1520      601796 :     foreach(l, estate->es_subplanstates)
    1521             :     {
    1522       46600 :         PlanState  *subplanstate = (PlanState *) lfirst(l);
    1523             : 
    1524       46600 :         ExecEndNode(subplanstate);
    1525             :     }
    1526             : 
    1527             :     /*
    1528             :      * destroy the executor's tuple table.  Actually we only care about
    1529             :      * releasing buffer pins and tupdesc refcounts; there's no need to pfree
    1530             :      * the TupleTableSlots, since the containing memory context is about to go
    1531             :      * away anyway.
    1532             :      */
    1533      555196 :     ExecResetTupleTable(estate->es_tupleTable, false);
    1534             : 
    1535             :     /*
    1536             :      * Close any Relations that have been opened for range table entries or
    1537             :      * result relations.
    1538             :      */
    1539      555196 :     ExecCloseResultRelations(estate);
    1540      555196 :     ExecCloseRangeTableRelations(estate);
    1541      555196 : }
    1542             : 
    1543             : /*
    1544             :  * Close any relations that have been opened for ResultRelInfos.
    1545             :  */
    1546             : void
    1547      558352 : ExecCloseResultRelations(EState *estate)
    1548             : {
    1549             :     ListCell   *l;
    1550             : 
    1551             :     /*
    1552             :      * close indexes of result relation(s) if any.  (Rels themselves are
    1553             :      * closed in ExecCloseRangeTableRelations())
    1554             :      *
    1555             :      * In addition, close the stub RTs that may be in each resultrel's
    1556             :      * ri_ancestorResultRels.
    1557             :      */
    1558      676288 :     foreach(l, estate->es_opened_result_relations)
    1559             :     {
    1560      117936 :         ResultRelInfo *resultRelInfo = lfirst(l);
    1561             :         ListCell   *lc;
    1562             : 
    1563      117936 :         ExecCloseIndices(resultRelInfo);
    1564      118188 :         foreach(lc, resultRelInfo->ri_ancestorResultRels)
    1565             :         {
    1566         252 :             ResultRelInfo *rInfo = lfirst(lc);
    1567             : 
    1568             :             /*
    1569             :              * Ancestors with RTI > 0 (should only be the root ancestor) are
    1570             :              * closed by ExecCloseRangeTableRelations.
    1571             :              */
    1572         252 :             if (rInfo->ri_RangeTableIndex > 0)
    1573         204 :                 continue;
    1574             : 
    1575          48 :             table_close(rInfo->ri_RelationDesc, NoLock);
    1576             :         }
    1577             :     }
    1578             : 
    1579             :     /* Close any relations that have been opened by ExecGetTriggerResultRel(). */
    1580      558862 :     foreach(l, estate->es_trig_target_relations)
    1581             :     {
    1582         510 :         ResultRelInfo *resultRelInfo = (ResultRelInfo *) lfirst(l);
    1583             : 
    1584             :         /*
    1585             :          * Assert this is a "dummy" ResultRelInfo, see above.  Otherwise we
    1586             :          * might be issuing a duplicate close against a Relation opened by
    1587             :          * ExecGetRangeTableRelation.
    1588             :          */
    1589             :         Assert(resultRelInfo->ri_RangeTableIndex == 0);
    1590             : 
    1591             :         /*
    1592             :          * Since ExecGetTriggerResultRel doesn't call ExecOpenIndices for
    1593             :          * these rels, we needn't call ExecCloseIndices either.
    1594             :          */
    1595             :         Assert(resultRelInfo->ri_NumIndices == 0);
    1596             : 
    1597         510 :         table_close(resultRelInfo->ri_RelationDesc, NoLock);
    1598             :     }
    1599      558352 : }
    1600             : 
    1601             : /*
    1602             :  * Close all relations opened by ExecGetRangeTableRelation().
    1603             :  *
    1604             :  * We do not release any locks we might hold on those rels.
    1605             :  */
    1606             : void
    1607      557946 : ExecCloseRangeTableRelations(EState *estate)
    1608             : {
    1609             :     int         i;
    1610             : 
    1611     1642566 :     for (i = 0; i < estate->es_range_table_size; i++)
    1612             :     {
    1613     1084620 :         if (estate->es_relations[i])
    1614      532442 :             table_close(estate->es_relations[i], NoLock);
    1615             :     }
    1616      557946 : }
    1617             : 
    1618             : /* ----------------------------------------------------------------
    1619             :  *      ExecutePlan
    1620             :  *
    1621             :  *      Processes the query plan until we have retrieved 'numberTuples' tuples,
    1622             :  *      moving in the specified direction.
    1623             :  *
    1624             :  *      Runs to completion if numberTuples is 0
    1625             :  * ----------------------------------------------------------------
    1626             :  */
    1627             : static void
    1628      572684 : ExecutePlan(QueryDesc *queryDesc,
    1629             :             CmdType operation,
    1630             :             bool sendTuples,
    1631             :             uint64 numberTuples,
    1632             :             ScanDirection direction,
    1633             :             DestReceiver *dest)
    1634             : {
    1635      572684 :     EState     *estate = queryDesc->estate;
    1636      572684 :     PlanState  *planstate = queryDesc->planstate;
    1637             :     bool        use_parallel_mode;
    1638             :     TupleTableSlot *slot;
    1639             :     uint64      current_tuple_count;
    1640             : 
    1641             :     /*
    1642             :      * initialize local variables
    1643             :      */
    1644      572684 :     current_tuple_count = 0;
    1645             : 
    1646             :     /*
    1647             :      * Set the direction.
    1648             :      */
    1649      572684 :     estate->es_direction = direction;
    1650             : 
    1651             :     /*
    1652             :      * Set up parallel mode if appropriate.
    1653             :      *
    1654             :      * Parallel mode only supports complete execution of a plan.  If we've
    1655             :      * already partially executed it, or if the caller asks us to exit early,
    1656             :      * we must force the plan to run without parallelism.
    1657             :      */
    1658      572684 :     if (queryDesc->already_executed || numberTuples != 0)
    1659      137656 :         use_parallel_mode = false;
    1660             :     else
    1661      435028 :         use_parallel_mode = queryDesc->plannedstmt->parallelModeNeeded;
    1662      572684 :     queryDesc->already_executed = true;
    1663             : 
    1664      572684 :     estate->es_use_parallel_mode = use_parallel_mode;
    1665      572684 :     if (use_parallel_mode)
    1666         694 :         EnterParallelMode();
    1667             : 
    1668             :     /*
    1669             :      * Loop until we've processed the proper number of tuples from the plan.
    1670             :      */
    1671             :     for (;;)
    1672             :     {
    1673             :         /* Reset the per-output-tuple exprcontext */
    1674    13817738 :         ResetPerTupleExprContext(estate);
    1675             : 
    1676             :         /*
    1677             :          * Execute the plan and obtain a tuple
    1678             :          */
    1679    13817738 :         slot = ExecProcNode(planstate);
    1680             : 
    1681             :         /*
    1682             :          * if the tuple is null, then we assume there is nothing more to
    1683             :          * process so we just end the loop...
    1684             :          */
    1685    13794140 :         if (TupIsNull(slot))
    1686             :             break;
    1687             : 
    1688             :         /*
    1689             :          * If we have a junk filter, then project a new tuple with the junk
    1690             :          * removed.
    1691             :          *
    1692             :          * Store this new "clean" tuple in the junkfilter's resultSlot.
    1693             :          * (Formerly, we stored it back over the "dirty" tuple, which is WRONG
    1694             :          * because that tuple slot has the wrong descriptor.)
    1695             :          */
    1696    13343100 :         if (estate->es_junkFilter != NULL)
    1697      270274 :             slot = ExecFilterJunk(estate->es_junkFilter, slot);
    1698             : 
    1699             :         /*
    1700             :          * If we are supposed to send the tuple somewhere, do so. (In
    1701             :          * practice, this is probably always the case at this point.)
    1702             :          */
    1703    13343100 :         if (sendTuples)
    1704             :         {
    1705             :             /*
    1706             :              * If we are not able to send the tuple, we assume the destination
    1707             :              * has closed and no more tuples can be sent. If that's the case,
    1708             :              * end the loop.
    1709             :              */
    1710    13343100 :             if (!dest->receiveSlot(slot, dest))
    1711           0 :                 break;
    1712             :         }
    1713             : 
    1714             :         /*
    1715             :          * Count tuples processed, if this is a SELECT.  (For other operation
    1716             :          * types, the ModifyTable plan node must count the appropriate
    1717             :          * events.)
    1718             :          */
    1719    13343100 :         if (operation == CMD_SELECT)
    1720    13336408 :             (estate->es_processed)++;
    1721             : 
    1722             :         /*
    1723             :          * check our tuple count.. if we've processed the proper number then
    1724             :          * quit, else loop again and process more tuples.  Zero numberTuples
    1725             :          * means no limit.
    1726             :          */
    1727    13343100 :         current_tuple_count++;
    1728    13343100 :         if (numberTuples && numberTuples == current_tuple_count)
    1729       98046 :             break;
    1730             :     }
    1731             : 
    1732             :     /*
    1733             :      * If we know we won't need to back up, we can release resources at this
    1734             :      * point.
    1735             :      */
    1736      549086 :     if (!(estate->es_top_eflags & EXEC_FLAG_BACKWARD))
    1737      541808 :         ExecShutdownNode(planstate);
    1738             : 
    1739      549086 :     if (use_parallel_mode)
    1740         682 :         ExitParallelMode();
    1741      549086 : }
    1742             : 
    1743             : 
    1744             : /*
    1745             :  * ExecRelCheck --- check that tuple meets check constraints for result relation
    1746             :  *
    1747             :  * Returns NULL if OK, else name of failed check constraint
    1748             :  */
    1749             : static const char *
    1750        3034 : ExecRelCheck(ResultRelInfo *resultRelInfo,
    1751             :              TupleTableSlot *slot, EState *estate)
    1752             : {
    1753        3034 :     Relation    rel = resultRelInfo->ri_RelationDesc;
    1754        3034 :     int         ncheck = rel->rd_att->constr->num_check;
    1755        3034 :     ConstrCheck *check = rel->rd_att->constr->check;
    1756             :     ExprContext *econtext;
    1757             :     MemoryContext oldContext;
    1758             : 
    1759             :     /*
    1760             :      * CheckNNConstraintFetch let this pass with only a warning, but now we
    1761             :      * should fail rather than possibly failing to enforce an important
    1762             :      * constraint.
    1763             :      */
    1764        3034 :     if (ncheck != rel->rd_rel->relchecks)
    1765           0 :         elog(ERROR, "%d pg_constraint record(s) missing for relation \"%s\"",
    1766             :              rel->rd_rel->relchecks - ncheck, RelationGetRelationName(rel));
    1767             : 
    1768             :     /*
    1769             :      * If first time through for this result relation, build expression
    1770             :      * nodetrees for rel's constraint expressions.  Keep them in the per-query
    1771             :      * memory context so they'll survive throughout the query.
    1772             :      */
    1773        3034 :     if (resultRelInfo->ri_CheckConstraintExprs == NULL)
    1774             :     {
    1775        1358 :         oldContext = MemoryContextSwitchTo(estate->es_query_cxt);
    1776        1358 :         resultRelInfo->ri_CheckConstraintExprs = palloc0_array(ExprState *, ncheck);
    1777        3404 :         for (int i = 0; i < ncheck; i++)
    1778             :         {
    1779             :             Expr       *checkconstr;
    1780             : 
    1781             :             /* Skip not enforced constraint */
    1782        2052 :             if (!check[i].ccenforced)
    1783         204 :                 continue;
    1784             : 
    1785        1848 :             checkconstr = stringToNode(check[i].ccbin);
    1786        1848 :             checkconstr = (Expr *) expand_generated_columns_in_expr((Node *) checkconstr, rel, 1);
    1787        1842 :             resultRelInfo->ri_CheckConstraintExprs[i] =
    1788        1848 :                 ExecPrepareExpr(checkconstr, estate);
    1789             :         }
    1790        1352 :         MemoryContextSwitchTo(oldContext);
    1791             :     }
    1792             : 
    1793             :     /*
    1794             :      * We will use the EState's per-tuple context for evaluating constraint
    1795             :      * expressions (creating it if it's not already there).
    1796             :      */
    1797        3028 :     econtext = GetPerTupleExprContext(estate);
    1798             : 
    1799             :     /* Arrange for econtext's scan tuple to be the tuple under test */
    1800        3028 :     econtext->ecxt_scantuple = slot;
    1801             : 
    1802             :     /* And evaluate the constraints */
    1803        6950 :     for (int i = 0; i < ncheck; i++)
    1804             :     {
    1805        4370 :         ExprState  *checkconstr = resultRelInfo->ri_CheckConstraintExprs[i];
    1806             : 
    1807             :         /*
    1808             :          * NOTE: SQL specifies that a NULL result from a constraint expression
    1809             :          * is not to be treated as a failure.  Therefore, use ExecCheck not
    1810             :          * ExecQual.
    1811             :          */
    1812        4370 :         if (checkconstr && !ExecCheck(checkconstr, econtext))
    1813         448 :             return check[i].ccname;
    1814             :     }
    1815             : 
    1816             :     /* NULL result means no error */
    1817        2580 :     return NULL;
    1818             : }
    1819             : 
    1820             : /*
    1821             :  * ExecPartitionCheck --- check that tuple meets the partition constraint.
    1822             :  *
    1823             :  * Returns true if it meets the partition constraint.  If the constraint
    1824             :  * fails and we're asked to emit an error, do so and don't return; otherwise
    1825             :  * return false.
    1826             :  */
    1827             : bool
    1828      156618 : ExecPartitionCheck(ResultRelInfo *resultRelInfo, TupleTableSlot *slot,
    1829             :                    EState *estate, bool emitError)
    1830             : {
    1831             :     ExprContext *econtext;
    1832             :     bool        success;
    1833             : 
    1834             :     /*
    1835             :      * If first time through, build expression state tree for the partition
    1836             :      * check expression.  (In the corner case where the partition check
    1837             :      * expression is empty, ie there's a default partition and nothing else,
    1838             :      * we'll be fooled into executing this code each time through.  But it's
    1839             :      * pretty darn cheap in that case, so we don't worry about it.)
    1840             :      */
    1841      156618 :     if (resultRelInfo->ri_PartitionCheckExpr == NULL)
    1842             :     {
    1843             :         /*
    1844             :          * Ensure that the qual tree and prepared expression are in the
    1845             :          * query-lifespan context.
    1846             :          */
    1847        3738 :         MemoryContext oldcxt = MemoryContextSwitchTo(estate->es_query_cxt);
    1848        3738 :         List       *qual = RelationGetPartitionQual(resultRelInfo->ri_RelationDesc);
    1849             : 
    1850        3738 :         resultRelInfo->ri_PartitionCheckExpr = ExecPrepareCheck(qual, estate);
    1851        3738 :         MemoryContextSwitchTo(oldcxt);
    1852             :     }
    1853             : 
    1854             :     /*
    1855             :      * We will use the EState's per-tuple context for evaluating constraint
    1856             :      * expressions (creating it if it's not already there).
    1857             :      */
    1858      156618 :     econtext = GetPerTupleExprContext(estate);
    1859             : 
    1860             :     /* Arrange for econtext's scan tuple to be the tuple under test */
    1861      156618 :     econtext->ecxt_scantuple = slot;
    1862             : 
    1863             :     /*
    1864             :      * As in case of the cataloged constraints, we treat a NULL result as
    1865             :      * success here, not a failure.
    1866             :      */
    1867      156618 :     success = ExecCheck(resultRelInfo->ri_PartitionCheckExpr, econtext);
    1868             : 
    1869             :     /* if asked to emit error, don't actually return on failure */
    1870      156618 :     if (!success && emitError)
    1871         202 :         ExecPartitionCheckEmitError(resultRelInfo, slot, estate);
    1872             : 
    1873      156416 :     return success;
    1874             : }
    1875             : 
    1876             : /*
    1877             :  * ExecPartitionCheckEmitError - Form and emit an error message after a failed
    1878             :  * partition constraint check.
    1879             :  */
    1880             : void
    1881         250 : ExecPartitionCheckEmitError(ResultRelInfo *resultRelInfo,
    1882             :                             TupleTableSlot *slot,
    1883             :                             EState *estate)
    1884             : {
    1885             :     Oid         root_relid;
    1886             :     TupleDesc   tupdesc;
    1887             :     char       *val_desc;
    1888             :     Bitmapset  *modifiedCols;
    1889             : 
    1890             :     /*
    1891             :      * If the tuple has been routed, it's been converted to the partition's
    1892             :      * rowtype, which might differ from the root table's.  We must convert it
    1893             :      * back to the root table's rowtype so that val_desc in the error message
    1894             :      * matches the input tuple.
    1895             :      */
    1896         250 :     if (resultRelInfo->ri_RootResultRelInfo)
    1897             :     {
    1898          20 :         ResultRelInfo *rootrel = resultRelInfo->ri_RootResultRelInfo;
    1899             :         TupleDesc   old_tupdesc;
    1900             :         AttrMap    *map;
    1901             : 
    1902          20 :         root_relid = RelationGetRelid(rootrel->ri_RelationDesc);
    1903          20 :         tupdesc = RelationGetDescr(rootrel->ri_RelationDesc);
    1904             : 
    1905          20 :         old_tupdesc = RelationGetDescr(resultRelInfo->ri_RelationDesc);
    1906             :         /* a reverse map */
    1907          20 :         map = build_attrmap_by_name_if_req(old_tupdesc, tupdesc, false);
    1908             : 
    1909             :         /*
    1910             :          * Partition-specific slot's tupdesc can't be changed, so allocate a
    1911             :          * new one.
    1912             :          */
    1913          20 :         if (map != NULL)
    1914           8 :             slot = execute_attr_map_slot(map, slot,
    1915             :                                          MakeTupleTableSlot(tupdesc, &TTSOpsVirtual));
    1916          20 :         modifiedCols = bms_union(ExecGetInsertedCols(rootrel, estate),
    1917          20 :                                  ExecGetUpdatedCols(rootrel, estate));
    1918             :     }
    1919             :     else
    1920             :     {
    1921         230 :         root_relid = RelationGetRelid(resultRelInfo->ri_RelationDesc);
    1922         230 :         tupdesc = RelationGetDescr(resultRelInfo->ri_RelationDesc);
    1923         230 :         modifiedCols = bms_union(ExecGetInsertedCols(resultRelInfo, estate),
    1924         230 :                                  ExecGetUpdatedCols(resultRelInfo, estate));
    1925             :     }
    1926             : 
    1927         250 :     val_desc = ExecBuildSlotValueDescription(root_relid,
    1928             :                                              slot,
    1929             :                                              tupdesc,
    1930             :                                              modifiedCols,
    1931             :                                              64);
    1932         250 :     ereport(ERROR,
    1933             :             (errcode(ERRCODE_CHECK_VIOLATION),
    1934             :              errmsg("new row for relation \"%s\" violates partition constraint",
    1935             :                     RelationGetRelationName(resultRelInfo->ri_RelationDesc)),
    1936             :              val_desc ? errdetail("Failing row contains %s.", val_desc) : 0,
    1937             :              errtable(resultRelInfo->ri_RelationDesc)));
    1938             : }
    1939             : 
    1940             : /*
    1941             :  * ExecConstraints - check constraints of the tuple in 'slot'
    1942             :  *
    1943             :  * This checks the traditional NOT NULL and check constraints.
    1944             :  *
    1945             :  * The partition constraint is *NOT* checked.
    1946             :  *
    1947             :  * Note: 'slot' contains the tuple to check the constraints of, which may
    1948             :  * have been converted from the original input tuple after tuple routing.
    1949             :  * 'resultRelInfo' is the final result relation, after tuple routing.
    1950             :  */
    1951             : void
    1952     4577380 : ExecConstraints(ResultRelInfo *resultRelInfo,
    1953             :                 TupleTableSlot *slot, EState *estate)
    1954             : {
    1955     4577380 :     Relation    rel = resultRelInfo->ri_RelationDesc;
    1956     4577380 :     TupleDesc   tupdesc = RelationGetDescr(rel);
    1957     4577380 :     TupleConstr *constr = tupdesc->constr;
    1958             :     Bitmapset  *modifiedCols;
    1959     4577380 :     List       *notnull_virtual_attrs = NIL;
    1960             : 
    1961             :     Assert(constr);             /* we should not be called otherwise */
    1962             : 
    1963             :     /*
    1964             :      * Verify not-null constraints.
    1965             :      *
    1966             :      * Not-null constraints on virtual generated columns are collected and
    1967             :      * checked separately below.
    1968             :      */
    1969     4577380 :     if (constr->has_not_null)
    1970             :     {
    1971    16955380 :         for (AttrNumber attnum = 1; attnum <= tupdesc->natts; attnum++)
    1972             :         {
    1973    12384542 :             Form_pg_attribute att = TupleDescAttr(tupdesc, attnum - 1);
    1974             : 
    1975    12384542 :             if (att->attnotnull && att->attgenerated == ATTRIBUTE_GENERATED_VIRTUAL)
    1976         108 :                 notnull_virtual_attrs = lappend_int(notnull_virtual_attrs, attnum);
    1977    12384434 :             else if (att->attnotnull && slot_attisnull(slot, attnum))
    1978         314 :                 ReportNotNullViolationError(resultRelInfo, slot, estate, attnum);
    1979             :         }
    1980             :     }
    1981             : 
    1982             :     /*
    1983             :      * Verify not-null constraints on virtual generated column, if any.
    1984             :      */
    1985     4577066 :     if (notnull_virtual_attrs)
    1986             :     {
    1987             :         AttrNumber  attnum;
    1988             : 
    1989         100 :         attnum = ExecRelGenVirtualNotNull(resultRelInfo, slot, estate,
    1990             :                                           notnull_virtual_attrs);
    1991         100 :         if (attnum != InvalidAttrNumber)
    1992          42 :             ReportNotNullViolationError(resultRelInfo, slot, estate, attnum);
    1993             :     }
    1994             : 
    1995             :     /*
    1996             :      * Verify check constraints.
    1997             :      */
    1998     4577024 :     if (rel->rd_rel->relchecks > 0)
    1999             :     {
    2000             :         const char *failed;
    2001             : 
    2002        3034 :         if ((failed = ExecRelCheck(resultRelInfo, slot, estate)) != NULL)
    2003             :         {
    2004             :             char       *val_desc;
    2005         448 :             Relation    orig_rel = rel;
    2006             : 
    2007             :             /*
    2008             :              * If the tuple has been routed, it's been converted to the
    2009             :              * partition's rowtype, which might differ from the root table's.
    2010             :              * We must convert it back to the root table's rowtype so that
    2011             :              * val_desc shown error message matches the input tuple.
    2012             :              */
    2013         448 :             if (resultRelInfo->ri_RootResultRelInfo)
    2014             :             {
    2015          90 :                 ResultRelInfo *rootrel = resultRelInfo->ri_RootResultRelInfo;
    2016          90 :                 TupleDesc   old_tupdesc = RelationGetDescr(rel);
    2017             :                 AttrMap    *map;
    2018             : 
    2019          90 :                 tupdesc = RelationGetDescr(rootrel->ri_RelationDesc);
    2020             :                 /* a reverse map */
    2021          90 :                 map = build_attrmap_by_name_if_req(old_tupdesc,
    2022             :                                                    tupdesc,
    2023             :                                                    false);
    2024             : 
    2025             :                 /*
    2026             :                  * Partition-specific slot's tupdesc can't be changed, so
    2027             :                  * allocate a new one.
    2028             :                  */
    2029          90 :                 if (map != NULL)
    2030          60 :                     slot = execute_attr_map_slot(map, slot,
    2031             :                                                  MakeTupleTableSlot(tupdesc, &TTSOpsVirtual));
    2032          90 :                 modifiedCols = bms_union(ExecGetInsertedCols(rootrel, estate),
    2033          90 :                                          ExecGetUpdatedCols(rootrel, estate));
    2034          90 :                 rel = rootrel->ri_RelationDesc;
    2035             :             }
    2036             :             else
    2037         358 :                 modifiedCols = bms_union(ExecGetInsertedCols(resultRelInfo, estate),
    2038         358 :                                          ExecGetUpdatedCols(resultRelInfo, estate));
    2039         448 :             val_desc = ExecBuildSlotValueDescription(RelationGetRelid(rel),
    2040             :                                                      slot,
    2041             :                                                      tupdesc,
    2042             :                                                      modifiedCols,
    2043             :                                                      64);
    2044         448 :             ereport(ERROR,
    2045             :                     (errcode(ERRCODE_CHECK_VIOLATION),
    2046             :                      errmsg("new row for relation \"%s\" violates check constraint \"%s\"",
    2047             :                             RelationGetRelationName(orig_rel), failed),
    2048             :                      val_desc ? errdetail("Failing row contains %s.", val_desc) : 0,
    2049             :                      errtableconstraint(orig_rel, failed)));
    2050             :         }
    2051             :     }
    2052     4576570 : }
    2053             : 
    2054             : /*
    2055             :  * Verify not-null constraints on virtual generated columns of the given
    2056             :  * tuple slot.
    2057             :  *
    2058             :  * Return value of InvalidAttrNumber means all not-null constraints on virtual
    2059             :  * generated columns are satisfied.  A return value > 0 means a not-null
    2060             :  * violation happened for that attribute.
    2061             :  *
    2062             :  * notnull_virtual_attrs is the list of the attnums of virtual generated column with
    2063             :  * not-null constraints.
    2064             :  */
    2065             : AttrNumber
    2066         184 : ExecRelGenVirtualNotNull(ResultRelInfo *resultRelInfo, TupleTableSlot *slot,
    2067             :                          EState *estate, List *notnull_virtual_attrs)
    2068             : {
    2069         184 :     Relation    rel = resultRelInfo->ri_RelationDesc;
    2070             :     ExprContext *econtext;
    2071             :     MemoryContext oldContext;
    2072             : 
    2073             :     /*
    2074             :      * We implement this by building a NullTest node for each virtual
    2075             :      * generated column, which we cache in resultRelInfo, and running those
    2076             :      * through ExecCheck().
    2077             :      */
    2078         184 :     if (resultRelInfo->ri_GenVirtualNotNullConstraintExprs == NULL)
    2079             :     {
    2080         132 :         oldContext = MemoryContextSwitchTo(estate->es_query_cxt);
    2081         132 :         resultRelInfo->ri_GenVirtualNotNullConstraintExprs =
    2082         132 :             palloc0_array(ExprState *, list_length(notnull_virtual_attrs));
    2083             : 
    2084         430 :         foreach_int(attnum, notnull_virtual_attrs)
    2085             :         {
    2086         166 :             int         i = foreach_current_index(attnum);
    2087             :             NullTest   *nnulltest;
    2088             : 
    2089             :             /* "generated_expression IS NOT NULL" check. */
    2090         166 :             nnulltest = makeNode(NullTest);
    2091         166 :             nnulltest->arg = (Expr *) build_generation_expression(rel, attnum);
    2092         166 :             nnulltest->nulltesttype = IS_NOT_NULL;
    2093         166 :             nnulltest->argisrow = false;
    2094         166 :             nnulltest->location = -1;
    2095             : 
    2096         166 :             resultRelInfo->ri_GenVirtualNotNullConstraintExprs[i] =
    2097         166 :                 ExecPrepareExpr((Expr *) nnulltest, estate);
    2098             :         }
    2099         132 :         MemoryContextSwitchTo(oldContext);
    2100             :     }
    2101             : 
    2102             :     /*
    2103             :      * We will use the EState's per-tuple context for evaluating virtual
    2104             :      * generated column not null constraint expressions (creating it if it's
    2105             :      * not already there).
    2106             :      */
    2107         184 :     econtext = GetPerTupleExprContext(estate);
    2108             : 
    2109             :     /* Arrange for econtext's scan tuple to be the tuple under test */
    2110         184 :     econtext->ecxt_scantuple = slot;
    2111             : 
    2112             :     /* And evaluate the check constraints for virtual generated column */
    2113         470 :     foreach_int(attnum, notnull_virtual_attrs)
    2114             :     {
    2115         246 :         int         i = foreach_current_index(attnum);
    2116         246 :         ExprState  *exprstate = resultRelInfo->ri_GenVirtualNotNullConstraintExprs[i];
    2117             : 
    2118             :         Assert(exprstate != NULL);
    2119         246 :         if (!ExecCheck(exprstate, econtext))
    2120          72 :             return attnum;
    2121             :     }
    2122             : 
    2123             :     /* InvalidAttrNumber result means no error */
    2124         112 :     return InvalidAttrNumber;
    2125             : }
    2126             : 
    2127             : /*
    2128             :  * Report a violation of a not-null constraint that was already detected.
    2129             :  */
    2130             : static void
    2131         356 : ReportNotNullViolationError(ResultRelInfo *resultRelInfo, TupleTableSlot *slot,
    2132             :                             EState *estate, int attnum)
    2133             : {
    2134             :     Bitmapset  *modifiedCols;
    2135             :     char       *val_desc;
    2136         356 :     Relation    rel = resultRelInfo->ri_RelationDesc;
    2137         356 :     Relation    orig_rel = rel;
    2138         356 :     TupleDesc   tupdesc = RelationGetDescr(rel);
    2139         356 :     TupleDesc   orig_tupdesc = RelationGetDescr(rel);
    2140         356 :     Form_pg_attribute att = TupleDescAttr(tupdesc, attnum - 1);
    2141             : 
    2142             :     Assert(attnum > 0);
    2143             : 
    2144             :     /*
    2145             :      * If the tuple has been routed, it's been converted to the partition's
    2146             :      * rowtype, which might differ from the root table's.  We must convert it
    2147             :      * back to the root table's rowtype so that val_desc shown error message
    2148             :      * matches the input tuple.
    2149             :      */
    2150         356 :     if (resultRelInfo->ri_RootResultRelInfo)
    2151             :     {
    2152          72 :         ResultRelInfo *rootrel = resultRelInfo->ri_RootResultRelInfo;
    2153             :         AttrMap    *map;
    2154             : 
    2155          72 :         tupdesc = RelationGetDescr(rootrel->ri_RelationDesc);
    2156             :         /* a reverse map */
    2157          72 :         map = build_attrmap_by_name_if_req(orig_tupdesc,
    2158             :                                            tupdesc,
    2159             :                                            false);
    2160             : 
    2161             :         /*
    2162             :          * Partition-specific slot's tupdesc can't be changed, so allocate a
    2163             :          * new one.
    2164             :          */
    2165          72 :         if (map != NULL)
    2166          42 :             slot = execute_attr_map_slot(map, slot,
    2167             :                                          MakeTupleTableSlot(tupdesc, &TTSOpsVirtual));
    2168          72 :         modifiedCols = bms_union(ExecGetInsertedCols(rootrel, estate),
    2169          72 :                                  ExecGetUpdatedCols(rootrel, estate));
    2170          72 :         rel = rootrel->ri_RelationDesc;
    2171             :     }
    2172             :     else
    2173         284 :         modifiedCols = bms_union(ExecGetInsertedCols(resultRelInfo, estate),
    2174         284 :                                  ExecGetUpdatedCols(resultRelInfo, estate));
    2175             : 
    2176         356 :     val_desc = ExecBuildSlotValueDescription(RelationGetRelid(rel),
    2177             :                                              slot,
    2178             :                                              tupdesc,
    2179             :                                              modifiedCols,
    2180             :                                              64);
    2181         356 :     ereport(ERROR,
    2182             :             errcode(ERRCODE_NOT_NULL_VIOLATION),
    2183             :             errmsg("null value in column \"%s\" of relation \"%s\" violates not-null constraint",
    2184             :                    NameStr(att->attname),
    2185             :                    RelationGetRelationName(orig_rel)),
    2186             :             val_desc ? errdetail("Failing row contains %s.", val_desc) : 0,
    2187             :             errtablecol(orig_rel, attnum));
    2188             : }
    2189             : 
    2190             : /*
    2191             :  * ExecWithCheckOptions -- check that tuple satisfies any WITH CHECK OPTIONs
    2192             :  * of the specified kind.
    2193             :  *
    2194             :  * Note that this needs to be called multiple times to ensure that all kinds of
    2195             :  * WITH CHECK OPTIONs are handled (both those from views which have the WITH
    2196             :  * CHECK OPTION set and from row-level security policies).  See ExecInsert()
    2197             :  * and ExecUpdate().
    2198             :  */
    2199             : void
    2200        2102 : ExecWithCheckOptions(WCOKind kind, ResultRelInfo *resultRelInfo,
    2201             :                      TupleTableSlot *slot, EState *estate)
    2202             : {
    2203        2102 :     Relation    rel = resultRelInfo->ri_RelationDesc;
    2204        2102 :     TupleDesc   tupdesc = RelationGetDescr(rel);
    2205             :     ExprContext *econtext;
    2206             :     ListCell   *l1,
    2207             :                *l2;
    2208             : 
    2209             :     /*
    2210             :      * We will use the EState's per-tuple context for evaluating constraint
    2211             :      * expressions (creating it if it's not already there).
    2212             :      */
    2213        2102 :     econtext = GetPerTupleExprContext(estate);
    2214             : 
    2215             :     /* Arrange for econtext's scan tuple to be the tuple under test */
    2216        2102 :     econtext->ecxt_scantuple = slot;
    2217             : 
    2218             :     /* Check each of the constraints */
    2219        5062 :     forboth(l1, resultRelInfo->ri_WithCheckOptions,
    2220             :             l2, resultRelInfo->ri_WithCheckOptionExprs)
    2221             :     {
    2222        3482 :         WithCheckOption *wco = (WithCheckOption *) lfirst(l1);
    2223        3482 :         ExprState  *wcoExpr = (ExprState *) lfirst(l2);
    2224             : 
    2225             :         /*
    2226             :          * Skip any WCOs which are not the kind we are looking for at this
    2227             :          * time.
    2228             :          */
    2229        3482 :         if (wco->kind != kind)
    2230        1960 :             continue;
    2231             : 
    2232             :         /*
    2233             :          * WITH CHECK OPTION checks are intended to ensure that the new tuple
    2234             :          * is visible (in the case of a view) or that it passes the
    2235             :          * 'with-check' policy (in the case of row security). If the qual
    2236             :          * evaluates to NULL or FALSE, then the new tuple won't be included in
    2237             :          * the view or doesn't pass the 'with-check' policy for the table.
    2238             :          */
    2239        1522 :         if (!ExecQual(wcoExpr, econtext))
    2240             :         {
    2241             :             char       *val_desc;
    2242             :             Bitmapset  *modifiedCols;
    2243             : 
    2244         522 :             switch (wco->kind)
    2245             :             {
    2246             :                     /*
    2247             :                      * For WITH CHECK OPTIONs coming from views, we might be
    2248             :                      * able to provide the details on the row, depending on
    2249             :                      * the permissions on the relation (that is, if the user
    2250             :                      * could view it directly anyway).  For RLS violations, we
    2251             :                      * don't include the data since we don't know if the user
    2252             :                      * should be able to view the tuple as that depends on the
    2253             :                      * USING policy.
    2254             :                      */
    2255         228 :                 case WCO_VIEW_CHECK:
    2256             :                     /* See the comment in ExecConstraints(). */
    2257         228 :                     if (resultRelInfo->ri_RootResultRelInfo)
    2258             :                     {
    2259          42 :                         ResultRelInfo *rootrel = resultRelInfo->ri_RootResultRelInfo;
    2260          42 :                         TupleDesc   old_tupdesc = RelationGetDescr(rel);
    2261             :                         AttrMap    *map;
    2262             : 
    2263          42 :                         tupdesc = RelationGetDescr(rootrel->ri_RelationDesc);
    2264             :                         /* a reverse map */
    2265          42 :                         map = build_attrmap_by_name_if_req(old_tupdesc,
    2266             :                                                            tupdesc,
    2267             :                                                            false);
    2268             : 
    2269             :                         /*
    2270             :                          * Partition-specific slot's tupdesc can't be changed,
    2271             :                          * so allocate a new one.
    2272             :                          */
    2273          42 :                         if (map != NULL)
    2274          24 :                             slot = execute_attr_map_slot(map, slot,
    2275             :                                                          MakeTupleTableSlot(tupdesc, &TTSOpsVirtual));
    2276             : 
    2277          42 :                         modifiedCols = bms_union(ExecGetInsertedCols(rootrel, estate),
    2278          42 :                                                  ExecGetUpdatedCols(rootrel, estate));
    2279          42 :                         rel = rootrel->ri_RelationDesc;
    2280             :                     }
    2281             :                     else
    2282         186 :                         modifiedCols = bms_union(ExecGetInsertedCols(resultRelInfo, estate),
    2283         186 :                                                  ExecGetUpdatedCols(resultRelInfo, estate));
    2284         228 :                     val_desc = ExecBuildSlotValueDescription(RelationGetRelid(rel),
    2285             :                                                              slot,
    2286             :                                                              tupdesc,
    2287             :                                                              modifiedCols,
    2288             :                                                              64);
    2289             : 
    2290         228 :                     ereport(ERROR,
    2291             :                             (errcode(ERRCODE_WITH_CHECK_OPTION_VIOLATION),
    2292             :                              errmsg("new row violates check option for view \"%s\"",
    2293             :                                     wco->relname),
    2294             :                              val_desc ? errdetail("Failing row contains %s.",
    2295             :                                                   val_desc) : 0));
    2296             :                     break;
    2297         246 :                 case WCO_RLS_INSERT_CHECK:
    2298             :                 case WCO_RLS_UPDATE_CHECK:
    2299         246 :                     if (wco->polname != NULL)
    2300          60 :                         ereport(ERROR,
    2301             :                                 (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
    2302             :                                  errmsg("new row violates row-level security policy \"%s\" for table \"%s\"",
    2303             :                                         wco->polname, wco->relname)));
    2304             :                     else
    2305         186 :                         ereport(ERROR,
    2306             :                                 (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
    2307             :                                  errmsg("new row violates row-level security policy for table \"%s\"",
    2308             :                                         wco->relname)));
    2309             :                     break;
    2310          24 :                 case WCO_RLS_MERGE_UPDATE_CHECK:
    2311             :                 case WCO_RLS_MERGE_DELETE_CHECK:
    2312          24 :                     if (wco->polname != NULL)
    2313           0 :                         ereport(ERROR,
    2314             :                                 (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
    2315             :                                  errmsg("target row violates row-level security policy \"%s\" (USING expression) for table \"%s\"",
    2316             :                                         wco->polname, wco->relname)));
    2317             :                     else
    2318          24 :                         ereport(ERROR,
    2319             :                                 (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
    2320             :                                  errmsg("target row violates row-level security policy (USING expression) for table \"%s\"",
    2321             :                                         wco->relname)));
    2322             :                     break;
    2323          24 :                 case WCO_RLS_CONFLICT_CHECK:
    2324          24 :                     if (wco->polname != NULL)
    2325           0 :                         ereport(ERROR,
    2326             :                                 (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
    2327             :                                  errmsg("new row violates row-level security policy \"%s\" (USING expression) for table \"%s\"",
    2328             :                                         wco->polname, wco->relname)));
    2329             :                     else
    2330          24 :                         ereport(ERROR,
    2331             :                                 (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
    2332             :                                  errmsg("new row violates row-level security policy (USING expression) for table \"%s\"",
    2333             :                                         wco->relname)));
    2334             :                     break;
    2335           0 :                 default:
    2336           0 :                     elog(ERROR, "unrecognized WCO kind: %u", wco->kind);
    2337             :                     break;
    2338             :             }
    2339             :         }
    2340             :     }
    2341        1580 : }
    2342             : 
    2343             : /*
    2344             :  * ExecBuildSlotValueDescription -- construct a string representing a tuple
    2345             :  *
    2346             :  * This is intentionally very similar to BuildIndexValueDescription, but
    2347             :  * unlike that function, we truncate long field values (to at most maxfieldlen
    2348             :  * bytes).  That seems necessary here since heap field values could be very
    2349             :  * long, whereas index entries typically aren't so wide.
    2350             :  *
    2351             :  * Also, unlike the case with index entries, we need to be prepared to ignore
    2352             :  * dropped columns.  We used to use the slot's tuple descriptor to decode the
    2353             :  * data, but the slot's descriptor doesn't identify dropped columns, so we
    2354             :  * now need to be passed the relation's descriptor.
    2355             :  *
    2356             :  * Note that, like BuildIndexValueDescription, if the user does not have
    2357             :  * permission to view any of the columns involved, a NULL is returned.  Unlike
    2358             :  * BuildIndexValueDescription, if the user has access to view a subset of the
    2359             :  * column involved, that subset will be returned with a key identifying which
    2360             :  * columns they are.
    2361             :  */
    2362             : char *
    2363        1386 : ExecBuildSlotValueDescription(Oid reloid,
    2364             :                               TupleTableSlot *slot,
    2365             :                               TupleDesc tupdesc,
    2366             :                               Bitmapset *modifiedCols,
    2367             :                               int maxfieldlen)
    2368             : {
    2369             :     StringInfoData buf;
    2370             :     StringInfoData collist;
    2371        1386 :     bool        write_comma = false;
    2372        1386 :     bool        write_comma_collist = false;
    2373             :     int         i;
    2374             :     AclResult   aclresult;
    2375        1386 :     bool        table_perm = false;
    2376        1386 :     bool        any_perm = false;
    2377             : 
    2378             :     /*
    2379             :      * Check if RLS is enabled and should be active for the relation; if so,
    2380             :      * then don't return anything.  Otherwise, go through normal permission
    2381             :      * checks.
    2382             :      */
    2383        1386 :     if (check_enable_rls(reloid, InvalidOid, true) == RLS_ENABLED)
    2384           0 :         return NULL;
    2385             : 
    2386        1386 :     initStringInfo(&buf);
    2387             : 
    2388        1386 :     appendStringInfoChar(&buf, '(');
    2389             : 
    2390             :     /*
    2391             :      * Check if the user has permissions to see the row.  Table-level SELECT
    2392             :      * allows access to all columns.  If the user does not have table-level
    2393             :      * SELECT then we check each column and include those the user has SELECT
    2394             :      * rights on.  Additionally, we always include columns the user provided
    2395             :      * data for.
    2396             :      */
    2397        1386 :     aclresult = pg_class_aclcheck(reloid, GetUserId(), ACL_SELECT);
    2398        1386 :     if (aclresult != ACLCHECK_OK)
    2399             :     {
    2400             :         /* Set up the buffer for the column list */
    2401          60 :         initStringInfo(&collist);
    2402          60 :         appendStringInfoChar(&collist, '(');
    2403             :     }
    2404             :     else
    2405        1326 :         table_perm = any_perm = true;
    2406             : 
    2407             :     /* Make sure the tuple is fully deconstructed */
    2408        1386 :     slot_getallattrs(slot);
    2409             : 
    2410        4948 :     for (i = 0; i < tupdesc->natts; i++)
    2411             :     {
    2412        3562 :         bool        column_perm = false;
    2413             :         char       *val;
    2414             :         int         vallen;
    2415        3562 :         Form_pg_attribute att = TupleDescAttr(tupdesc, i);
    2416             : 
    2417             :         /* ignore dropped columns */
    2418        3562 :         if (att->attisdropped)
    2419          38 :             continue;
    2420             : 
    2421        3524 :         if (!table_perm)
    2422             :         {
    2423             :             /*
    2424             :              * No table-level SELECT, so need to make sure they either have
    2425             :              * SELECT rights on the column or that they have provided the data
    2426             :              * for the column.  If not, omit this column from the error
    2427             :              * message.
    2428             :              */
    2429         234 :             aclresult = pg_attribute_aclcheck(reloid, att->attnum,
    2430             :                                               GetUserId(), ACL_SELECT);
    2431         234 :             if (bms_is_member(att->attnum - FirstLowInvalidHeapAttributeNumber,
    2432         138 :                               modifiedCols) || aclresult == ACLCHECK_OK)
    2433             :             {
    2434         144 :                 column_perm = any_perm = true;
    2435             : 
    2436         144 :                 if (write_comma_collist)
    2437          84 :                     appendStringInfoString(&collist, ", ");
    2438             :                 else
    2439          60 :                     write_comma_collist = true;
    2440             : 
    2441         144 :                 appendStringInfoString(&collist, NameStr(att->attname));
    2442             :             }
    2443             :         }
    2444             : 
    2445        3524 :         if (table_perm || column_perm)
    2446             :         {
    2447        3434 :             if (att->attgenerated == ATTRIBUTE_GENERATED_VIRTUAL)
    2448          54 :                 val = "virtual";
    2449        3380 :             else if (slot->tts_isnull[i])
    2450         634 :                 val = "null";
    2451             :             else
    2452             :             {
    2453             :                 Oid         foutoid;
    2454             :                 bool        typisvarlena;
    2455             : 
    2456        2746 :                 getTypeOutputInfo(att->atttypid,
    2457             :                                   &foutoid, &typisvarlena);
    2458        2746 :                 val = OidOutputFunctionCall(foutoid, slot->tts_values[i]);
    2459             :             }
    2460             : 
    2461        3434 :             if (write_comma)
    2462        2048 :                 appendStringInfoString(&buf, ", ");
    2463             :             else
    2464        1386 :                 write_comma = true;
    2465             : 
    2466             :             /* truncate if needed */
    2467        3434 :             vallen = strlen(val);
    2468        3434 :             if (vallen <= maxfieldlen)
    2469        3432 :                 appendBinaryStringInfo(&buf, val, vallen);
    2470             :             else
    2471             :             {
    2472           2 :                 vallen = pg_mbcliplen(val, vallen, maxfieldlen);
    2473           2 :                 appendBinaryStringInfo(&buf, val, vallen);
    2474           2 :                 appendStringInfoString(&buf, "...");
    2475             :             }
    2476             :         }
    2477             :     }
    2478             : 
    2479             :     /* If we end up with zero columns being returned, then return NULL. */
    2480        1386 :     if (!any_perm)
    2481           0 :         return NULL;
    2482             : 
    2483        1386 :     appendStringInfoChar(&buf, ')');
    2484             : 
    2485        1386 :     if (!table_perm)
    2486             :     {
    2487          60 :         appendStringInfoString(&collist, ") = ");
    2488          60 :         appendBinaryStringInfo(&collist, buf.data, buf.len);
    2489             : 
    2490          60 :         return collist.data;
    2491             :     }
    2492             : 
    2493        1326 :     return buf.data;
    2494             : }
    2495             : 
    2496             : 
    2497             : /*
    2498             :  * ExecUpdateLockMode -- find the appropriate UPDATE tuple lock mode for a
    2499             :  * given ResultRelInfo
    2500             :  */
    2501             : LockTupleMode
    2502        7838 : ExecUpdateLockMode(EState *estate, ResultRelInfo *relinfo)
    2503             : {
    2504             :     Bitmapset  *keyCols;
    2505             :     Bitmapset  *updatedCols;
    2506             : 
    2507             :     /*
    2508             :      * Compute lock mode to use.  If columns that are part of the key have not
    2509             :      * been modified, then we can use a weaker lock, allowing for better
    2510             :      * concurrency.
    2511             :      */
    2512        7838 :     updatedCols = ExecGetAllUpdatedCols(relinfo, estate);
    2513        7838 :     keyCols = RelationGetIndexAttrBitmap(relinfo->ri_RelationDesc,
    2514             :                                          INDEX_ATTR_BITMAP_KEY);
    2515             : 
    2516        7838 :     if (bms_overlap(keyCols, updatedCols))
    2517         266 :         return LockTupleExclusive;
    2518             : 
    2519        7572 :     return LockTupleNoKeyExclusive;
    2520             : }
    2521             : 
    2522             : /*
    2523             :  * ExecFindRowMark -- find the ExecRowMark struct for given rangetable index
    2524             :  *
    2525             :  * If no such struct, either return NULL or throw error depending on missing_ok
    2526             :  */
    2527             : ExecRowMark *
    2528       10912 : ExecFindRowMark(EState *estate, Index rti, bool missing_ok)
    2529             : {
    2530       10912 :     if (rti > 0 && rti <= estate->es_range_table_size &&
    2531       10912 :         estate->es_rowmarks != NULL)
    2532             :     {
    2533       10912 :         ExecRowMark *erm = estate->es_rowmarks[rti - 1];
    2534             : 
    2535       10912 :         if (erm)
    2536       10912 :             return erm;
    2537             :     }
    2538           0 :     if (!missing_ok)
    2539           0 :         elog(ERROR, "failed to find ExecRowMark for rangetable index %u", rti);
    2540           0 :     return NULL;
    2541             : }
    2542             : 
    2543             : /*
    2544             :  * ExecBuildAuxRowMark -- create an ExecAuxRowMark struct
    2545             :  *
    2546             :  * Inputs are the underlying ExecRowMark struct and the targetlist of the
    2547             :  * input plan node (not planstate node!).  We need the latter to find out
    2548             :  * the column numbers of the resjunk columns.
    2549             :  */
    2550             : ExecAuxRowMark *
    2551       10912 : ExecBuildAuxRowMark(ExecRowMark *erm, List *targetlist)
    2552             : {
    2553       10912 :     ExecAuxRowMark *aerm = (ExecAuxRowMark *) palloc0(sizeof(ExecAuxRowMark));
    2554             :     char        resname[32];
    2555             : 
    2556       10912 :     aerm->rowmark = erm;
    2557             : 
    2558             :     /* Look up the resjunk columns associated with this rowmark */
    2559       10912 :     if (erm->markType != ROW_MARK_COPY)
    2560             :     {
    2561             :         /* need ctid for all methods other than COPY */
    2562       10628 :         snprintf(resname, sizeof(resname), "ctid%u", erm->rowmarkId);
    2563       10628 :         aerm->ctidAttNo = ExecFindJunkAttributeInTlist(targetlist,
    2564             :                                                        resname);
    2565       10628 :         if (!AttributeNumberIsValid(aerm->ctidAttNo))
    2566           0 :             elog(ERROR, "could not find junk %s column", resname);
    2567             :     }
    2568             :     else
    2569             :     {
    2570             :         /* need wholerow if COPY */
    2571         284 :         snprintf(resname, sizeof(resname), "wholerow%u", erm->rowmarkId);
    2572         284 :         aerm->wholeAttNo = ExecFindJunkAttributeInTlist(targetlist,
    2573             :                                                         resname);
    2574         284 :         if (!AttributeNumberIsValid(aerm->wholeAttNo))
    2575           0 :             elog(ERROR, "could not find junk %s column", resname);
    2576             :     }
    2577             : 
    2578             :     /* if child rel, need tableoid */
    2579       10912 :     if (erm->rti != erm->prti)
    2580             :     {
    2581        1966 :         snprintf(resname, sizeof(resname), "tableoid%u", erm->rowmarkId);
    2582        1966 :         aerm->toidAttNo = ExecFindJunkAttributeInTlist(targetlist,
    2583             :                                                        resname);
    2584        1966 :         if (!AttributeNumberIsValid(aerm->toidAttNo))
    2585           0 :             elog(ERROR, "could not find junk %s column", resname);
    2586             :     }
    2587             : 
    2588       10912 :     return aerm;
    2589             : }
    2590             : 
    2591             : 
    2592             : /*
    2593             :  * EvalPlanQual logic --- recheck modified tuple(s) to see if we want to
    2594             :  * process the updated version under READ COMMITTED rules.
    2595             :  *
    2596             :  * See backend/executor/README for some info about how this works.
    2597             :  */
    2598             : 
    2599             : 
    2600             : /*
    2601             :  * Check the updated version of a tuple to see if we want to process it under
    2602             :  * READ COMMITTED rules.
    2603             :  *
    2604             :  *  epqstate - state for EvalPlanQual rechecking
    2605             :  *  relation - table containing tuple
    2606             :  *  rti - rangetable index of table containing tuple
    2607             :  *  inputslot - tuple for processing - this can be the slot from
    2608             :  *      EvalPlanQualSlot() for this rel, for increased efficiency.
    2609             :  *
    2610             :  * This tests whether the tuple in inputslot still matches the relevant
    2611             :  * quals. For that result to be useful, typically the input tuple has to be
    2612             :  * last row version (otherwise the result isn't particularly useful) and
    2613             :  * locked (otherwise the result might be out of date). That's typically
    2614             :  * achieved by using table_tuple_lock() with the
    2615             :  * TUPLE_LOCK_FLAG_FIND_LAST_VERSION flag.
    2616             :  *
    2617             :  * Returns a slot containing the new candidate update/delete tuple, or
    2618             :  * NULL if we determine we shouldn't process the row.
    2619             :  */
    2620             : TupleTableSlot *
    2621         258 : EvalPlanQual(EPQState *epqstate, Relation relation,
    2622             :              Index rti, TupleTableSlot *inputslot)
    2623             : {
    2624             :     TupleTableSlot *slot;
    2625             :     TupleTableSlot *testslot;
    2626             : 
    2627             :     Assert(rti > 0);
    2628             : 
    2629             :     /*
    2630             :      * Need to run a recheck subquery.  Initialize or reinitialize EPQ state.
    2631             :      */
    2632         258 :     EvalPlanQualBegin(epqstate);
    2633             : 
    2634             :     /*
    2635             :      * Callers will often use the EvalPlanQualSlot to store the tuple to avoid
    2636             :      * an unnecessary copy.
    2637             :      */
    2638         258 :     testslot = EvalPlanQualSlot(epqstate, relation, rti);
    2639         258 :     if (testslot != inputslot)
    2640          12 :         ExecCopySlot(testslot, inputslot);
    2641             : 
    2642             :     /*
    2643             :      * Mark that an EPQ tuple is available for this relation.  (If there is
    2644             :      * more than one result relation, the others remain marked as having no
    2645             :      * tuple available.)
    2646             :      */
    2647         258 :     epqstate->relsubs_done[rti - 1] = false;
    2648         258 :     epqstate->relsubs_blocked[rti - 1] = false;
    2649             : 
    2650             :     /*
    2651             :      * Run the EPQ query.  We assume it will return at most one tuple.
    2652             :      */
    2653         258 :     slot = EvalPlanQualNext(epqstate);
    2654             : 
    2655             :     /*
    2656             :      * If we got a tuple, force the slot to materialize the tuple so that it
    2657             :      * is not dependent on any local state in the EPQ query (in particular,
    2658             :      * it's highly likely that the slot contains references to any pass-by-ref
    2659             :      * datums that may be present in copyTuple).  As with the next step, this
    2660             :      * is to guard against early re-use of the EPQ query.
    2661             :      */
    2662         258 :     if (!TupIsNull(slot))
    2663         190 :         ExecMaterializeSlot(slot);
    2664             : 
    2665             :     /*
    2666             :      * Clear out the test tuple, and mark that no tuple is available here.
    2667             :      * This is needed in case the EPQ state is re-used to test a tuple for a
    2668             :      * different target relation.
    2669             :      */
    2670         258 :     ExecClearTuple(testslot);
    2671         258 :     epqstate->relsubs_blocked[rti - 1] = true;
    2672             : 
    2673         258 :     return slot;
    2674             : }
    2675             : 
    2676             : /*
    2677             :  * EvalPlanQualInit -- initialize during creation of a plan state node
    2678             :  * that might need to invoke EPQ processing.
    2679             :  *
    2680             :  * If the caller intends to use EvalPlanQual(), resultRelations should be
    2681             :  * a list of RT indexes of potential target relations for EvalPlanQual(),
    2682             :  * and we will arrange that the other listed relations don't return any
    2683             :  * tuple during an EvalPlanQual() call.  Otherwise resultRelations
    2684             :  * should be NIL.
    2685             :  *
    2686             :  * Note: subplan/auxrowmarks can be NULL/NIL if they will be set later
    2687             :  * with EvalPlanQualSetPlan.
    2688             :  */
    2689             : void
    2690      268144 : EvalPlanQualInit(EPQState *epqstate, EState *parentestate,
    2691             :                  Plan *subplan, List *auxrowmarks,
    2692             :                  int epqParam, List *resultRelations)
    2693             : {
    2694      268144 :     Index       rtsize = parentestate->es_range_table_size;
    2695             : 
    2696             :     /* initialize data not changing over EPQState's lifetime */
    2697      268144 :     epqstate->parentestate = parentestate;
    2698      268144 :     epqstate->epqParam = epqParam;
    2699      268144 :     epqstate->resultRelations = resultRelations;
    2700             : 
    2701             :     /*
    2702             :      * Allocate space to reference a slot for each potential rti - do so now
    2703             :      * rather than in EvalPlanQualBegin(), as done for other dynamically
    2704             :      * allocated resources, so EvalPlanQualSlot() can be used to hold tuples
    2705             :      * that *may* need EPQ later, without forcing the overhead of
    2706             :      * EvalPlanQualBegin().
    2707             :      */
    2708      268144 :     epqstate->tuple_table = NIL;
    2709      268144 :     epqstate->relsubs_slot = (TupleTableSlot **)
    2710      268144 :         palloc0(rtsize * sizeof(TupleTableSlot *));
    2711             : 
    2712             :     /* ... and remember data that EvalPlanQualBegin will need */
    2713      268144 :     epqstate->plan = subplan;
    2714      268144 :     epqstate->arowMarks = auxrowmarks;
    2715             : 
    2716             :     /* ... and mark the EPQ state inactive */
    2717      268144 :     epqstate->origslot = NULL;
    2718      268144 :     epqstate->recheckestate = NULL;
    2719      268144 :     epqstate->recheckplanstate = NULL;
    2720      268144 :     epqstate->relsubs_rowmark = NULL;
    2721      268144 :     epqstate->relsubs_done = NULL;
    2722      268144 :     epqstate->relsubs_blocked = NULL;
    2723      268144 : }
    2724             : 
    2725             : /*
    2726             :  * EvalPlanQualSetPlan -- set or change subplan of an EPQState.
    2727             :  *
    2728             :  * We used to need this so that ModifyTable could deal with multiple subplans.
    2729             :  * It could now be refactored out of existence.
    2730             :  */
    2731             : void
    2732      115146 : EvalPlanQualSetPlan(EPQState *epqstate, Plan *subplan, List *auxrowmarks)
    2733             : {
    2734             :     /* If we have a live EPQ query, shut it down */
    2735      115146 :     EvalPlanQualEnd(epqstate);
    2736             :     /* And set/change the plan pointer */
    2737      115146 :     epqstate->plan = subplan;
    2738             :     /* The rowmarks depend on the plan, too */
    2739      115146 :     epqstate->arowMarks = auxrowmarks;
    2740      115146 : }
    2741             : 
    2742             : /*
    2743             :  * Return, and create if necessary, a slot for an EPQ test tuple.
    2744             :  *
    2745             :  * Note this only requires EvalPlanQualInit() to have been called,
    2746             :  * EvalPlanQualBegin() is not necessary.
    2747             :  */
    2748             : TupleTableSlot *
    2749       17468 : EvalPlanQualSlot(EPQState *epqstate,
    2750             :                  Relation relation, Index rti)
    2751             : {
    2752             :     TupleTableSlot **slot;
    2753             : 
    2754             :     Assert(relation);
    2755             :     Assert(rti > 0 && rti <= epqstate->parentestate->es_range_table_size);
    2756       17468 :     slot = &epqstate->relsubs_slot[rti - 1];
    2757             : 
    2758       17468 :     if (*slot == NULL)
    2759             :     {
    2760             :         MemoryContext oldcontext;
    2761             : 
    2762        5984 :         oldcontext = MemoryContextSwitchTo(epqstate->parentestate->es_query_cxt);
    2763        5984 :         *slot = table_slot_create(relation, &epqstate->tuple_table);
    2764        5984 :         MemoryContextSwitchTo(oldcontext);
    2765             :     }
    2766             : 
    2767       17468 :     return *slot;
    2768             : }
    2769             : 
    2770             : /*
    2771             :  * Fetch the current row value for a non-locked relation, identified by rti,
    2772             :  * that needs to be scanned by an EvalPlanQual operation.  origslot must have
    2773             :  * been set to contain the current result row (top-level row) that we need to
    2774             :  * recheck.  Returns true if a substitution tuple was found, false if not.
    2775             :  */
    2776             : bool
    2777          26 : EvalPlanQualFetchRowMark(EPQState *epqstate, Index rti, TupleTableSlot *slot)
    2778             : {
    2779          26 :     ExecAuxRowMark *earm = epqstate->relsubs_rowmark[rti - 1];
    2780             :     ExecRowMark *erm;
    2781             :     Datum       datum;
    2782             :     bool        isNull;
    2783             : 
    2784             :     Assert(earm != NULL);
    2785             :     Assert(epqstate->origslot != NULL);
    2786             : 
    2787          26 :     erm = earm->rowmark;
    2788             : 
    2789          26 :     if (RowMarkRequiresRowShareLock(erm->markType))
    2790           0 :         elog(ERROR, "EvalPlanQual doesn't support locking rowmarks");
    2791             : 
    2792             :     /* if child rel, must check whether it produced this row */
    2793          26 :     if (erm->rti != erm->prti)
    2794             :     {
    2795             :         Oid         tableoid;
    2796             : 
    2797           0 :         datum = ExecGetJunkAttribute(epqstate->origslot,
    2798           0 :                                      earm->toidAttNo,
    2799             :                                      &isNull);
    2800             :         /* non-locked rels could be on the inside of outer joins */
    2801           0 :         if (isNull)
    2802           0 :             return false;
    2803             : 
    2804           0 :         tableoid = DatumGetObjectId(datum);
    2805             : 
    2806             :         Assert(OidIsValid(erm->relid));
    2807           0 :         if (tableoid != erm->relid)
    2808             :         {
    2809             :             /* this child is inactive right now */
    2810           0 :             return false;
    2811             :         }
    2812             :     }
    2813             : 
    2814          26 :     if (erm->markType == ROW_MARK_REFERENCE)
    2815             :     {
    2816             :         Assert(erm->relation != NULL);
    2817             : 
    2818             :         /* fetch the tuple's ctid */
    2819          26 :         datum = ExecGetJunkAttribute(epqstate->origslot,
    2820          26 :                                      earm->ctidAttNo,
    2821             :                                      &isNull);
    2822             :         /* non-locked rels could be on the inside of outer joins */
    2823          26 :         if (isNull)
    2824           0 :             return false;
    2825             : 
    2826             :         /* fetch requests on foreign tables must be passed to their FDW */
    2827          26 :         if (erm->relation->rd_rel->relkind == RELKIND_FOREIGN_TABLE)
    2828             :         {
    2829             :             FdwRoutine *fdwroutine;
    2830           0 :             bool        updated = false;
    2831             : 
    2832           0 :             fdwroutine = GetFdwRoutineForRelation(erm->relation, false);
    2833             :             /* this should have been checked already, but let's be safe */
    2834           0 :             if (fdwroutine->RefetchForeignRow == NULL)
    2835           0 :                 ereport(ERROR,
    2836             :                         (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
    2837             :                          errmsg("cannot lock rows in foreign table \"%s\"",
    2838             :                                 RelationGetRelationName(erm->relation))));
    2839             : 
    2840           0 :             fdwroutine->RefetchForeignRow(epqstate->recheckestate,
    2841             :                                           erm,
    2842             :                                           datum,
    2843             :                                           slot,
    2844             :                                           &updated);
    2845           0 :             if (TupIsNull(slot))
    2846           0 :                 elog(ERROR, "failed to fetch tuple for EvalPlanQual recheck");
    2847             : 
    2848             :             /*
    2849             :              * Ideally we'd insist on updated == false here, but that assumes
    2850             :              * that FDWs can track that exactly, which they might not be able
    2851             :              * to.  So just ignore the flag.
    2852             :              */
    2853           0 :             return true;
    2854             :         }
    2855             :         else
    2856             :         {
    2857             :             /* ordinary table, fetch the tuple */
    2858          26 :             if (!table_tuple_fetch_row_version(erm->relation,
    2859          26 :                                                (ItemPointer) DatumGetPointer(datum),
    2860             :                                                SnapshotAny, slot))
    2861           0 :                 elog(ERROR, "failed to fetch tuple for EvalPlanQual recheck");
    2862          26 :             return true;
    2863             :         }
    2864             :     }
    2865             :     else
    2866             :     {
    2867             :         Assert(erm->markType == ROW_MARK_COPY);
    2868             : 
    2869             :         /* fetch the whole-row Var for the relation */
    2870           0 :         datum = ExecGetJunkAttribute(epqstate->origslot,
    2871           0 :                                      earm->wholeAttNo,
    2872             :                                      &isNull);
    2873             :         /* non-locked rels could be on the inside of outer joins */
    2874           0 :         if (isNull)
    2875           0 :             return false;
    2876             : 
    2877           0 :         ExecStoreHeapTupleDatum(datum, slot);
    2878           0 :         return true;
    2879             :     }
    2880             : }
    2881             : 
    2882             : /*
    2883             :  * Fetch the next row (if any) from EvalPlanQual testing
    2884             :  *
    2885             :  * (In practice, there should never be more than one row...)
    2886             :  */
    2887             : TupleTableSlot *
    2888         314 : EvalPlanQualNext(EPQState *epqstate)
    2889             : {
    2890             :     MemoryContext oldcontext;
    2891             :     TupleTableSlot *slot;
    2892             : 
    2893         314 :     oldcontext = MemoryContextSwitchTo(epqstate->recheckestate->es_query_cxt);
    2894         314 :     slot = ExecProcNode(epqstate->recheckplanstate);
    2895         314 :     MemoryContextSwitchTo(oldcontext);
    2896             : 
    2897         314 :     return slot;
    2898             : }
    2899             : 
    2900             : /*
    2901             :  * Initialize or reset an EvalPlanQual state tree
    2902             :  */
    2903             : void
    2904         370 : EvalPlanQualBegin(EPQState *epqstate)
    2905             : {
    2906         370 :     EState     *parentestate = epqstate->parentestate;
    2907         370 :     EState     *recheckestate = epqstate->recheckestate;
    2908             : 
    2909         370 :     if (recheckestate == NULL)
    2910             :     {
    2911             :         /* First time through, so create a child EState */
    2912         226 :         EvalPlanQualStart(epqstate, epqstate->plan);
    2913             :     }
    2914             :     else
    2915             :     {
    2916             :         /*
    2917             :          * We already have a suitable child EPQ tree, so just reset it.
    2918             :          */
    2919         144 :         Index       rtsize = parentestate->es_range_table_size;
    2920         144 :         PlanState  *rcplanstate = epqstate->recheckplanstate;
    2921             : 
    2922             :         /*
    2923             :          * Reset the relsubs_done[] flags to equal relsubs_blocked[], so that
    2924             :          * the EPQ run will never attempt to fetch tuples from blocked target
    2925             :          * relations.
    2926             :          */
    2927         144 :         memcpy(epqstate->relsubs_done, epqstate->relsubs_blocked,
    2928             :                rtsize * sizeof(bool));
    2929             : 
    2930             :         /* Recopy current values of parent parameters */
    2931         144 :         if (parentestate->es_plannedstmt->paramExecTypes != NIL)
    2932             :         {
    2933             :             int         i;
    2934             : 
    2935             :             /*
    2936             :              * Force evaluation of any InitPlan outputs that could be needed
    2937             :              * by the subplan, just in case they got reset since
    2938             :              * EvalPlanQualStart (see comments therein).
    2939             :              */
    2940         144 :             ExecSetParamPlanMulti(rcplanstate->plan->extParam,
    2941         144 :                                   GetPerTupleExprContext(parentestate));
    2942             : 
    2943         144 :             i = list_length(parentestate->es_plannedstmt->paramExecTypes);
    2944             : 
    2945         306 :             while (--i >= 0)
    2946             :             {
    2947             :                 /* copy value if any, but not execPlan link */
    2948         162 :                 recheckestate->es_param_exec_vals[i].value =
    2949         162 :                     parentestate->es_param_exec_vals[i].value;
    2950         162 :                 recheckestate->es_param_exec_vals[i].isnull =
    2951         162 :                     parentestate->es_param_exec_vals[i].isnull;
    2952             :             }
    2953             :         }
    2954             : 
    2955             :         /*
    2956             :          * Mark child plan tree as needing rescan at all scan nodes.  The
    2957             :          * first ExecProcNode will take care of actually doing the rescan.
    2958             :          */
    2959         144 :         rcplanstate->chgParam = bms_add_member(rcplanstate->chgParam,
    2960             :                                                epqstate->epqParam);
    2961             :     }
    2962         370 : }
    2963             : 
    2964             : /*
    2965             :  * Start execution of an EvalPlanQual plan tree.
    2966             :  *
    2967             :  * This is a cut-down version of ExecutorStart(): we copy some state from
    2968             :  * the top-level estate rather than initializing it fresh.
    2969             :  */
    2970             : static void
    2971         226 : EvalPlanQualStart(EPQState *epqstate, Plan *planTree)
    2972             : {
    2973         226 :     EState     *parentestate = epqstate->parentestate;
    2974         226 :     Index       rtsize = parentestate->es_range_table_size;
    2975             :     EState     *rcestate;
    2976             :     MemoryContext oldcontext;
    2977             :     ListCell   *l;
    2978             : 
    2979         226 :     epqstate->recheckestate = rcestate = CreateExecutorState();
    2980             : 
    2981         226 :     oldcontext = MemoryContextSwitchTo(rcestate->es_query_cxt);
    2982             : 
    2983             :     /* signal that this is an EState for executing EPQ */
    2984         226 :     rcestate->es_epq_active = epqstate;
    2985             : 
    2986             :     /*
    2987             :      * Child EPQ EStates share the parent's copy of unchanging state such as
    2988             :      * the snapshot, rangetable, and external Param info.  They need their own
    2989             :      * copies of local state, including a tuple table, es_param_exec_vals,
    2990             :      * result-rel info, etc.
    2991             :      */
    2992         226 :     rcestate->es_direction = ForwardScanDirection;
    2993         226 :     rcestate->es_snapshot = parentestate->es_snapshot;
    2994         226 :     rcestate->es_crosscheck_snapshot = parentestate->es_crosscheck_snapshot;
    2995         226 :     rcestate->es_range_table = parentestate->es_range_table;
    2996         226 :     rcestate->es_range_table_size = parentestate->es_range_table_size;
    2997         226 :     rcestate->es_relations = parentestate->es_relations;
    2998         226 :     rcestate->es_rowmarks = parentestate->es_rowmarks;
    2999         226 :     rcestate->es_rteperminfos = parentestate->es_rteperminfos;
    3000         226 :     rcestate->es_plannedstmt = parentestate->es_plannedstmt;
    3001         226 :     rcestate->es_junkFilter = parentestate->es_junkFilter;
    3002         226 :     rcestate->es_output_cid = parentestate->es_output_cid;
    3003         226 :     rcestate->es_queryEnv = parentestate->es_queryEnv;
    3004             : 
    3005             :     /*
    3006             :      * ResultRelInfos needed by subplans are initialized from scratch when the
    3007             :      * subplans themselves are initialized.
    3008             :      */
    3009         226 :     rcestate->es_result_relations = NULL;
    3010             :     /* es_trig_target_relations must NOT be copied */
    3011         226 :     rcestate->es_top_eflags = parentestate->es_top_eflags;
    3012         226 :     rcestate->es_instrument = parentestate->es_instrument;
    3013             :     /* es_auxmodifytables must NOT be copied */
    3014             : 
    3015             :     /*
    3016             :      * The external param list is simply shared from parent.  The internal
    3017             :      * param workspace has to be local state, but we copy the initial values
    3018             :      * from the parent, so as to have access to any param values that were
    3019             :      * already set from other parts of the parent's plan tree.
    3020             :      */
    3021         226 :     rcestate->es_param_list_info = parentestate->es_param_list_info;
    3022         226 :     if (parentestate->es_plannedstmt->paramExecTypes != NIL)
    3023             :     {
    3024             :         int         i;
    3025             : 
    3026             :         /*
    3027             :          * Force evaluation of any InitPlan outputs that could be needed by
    3028             :          * the subplan.  (With more complexity, maybe we could postpone this
    3029             :          * till the subplan actually demands them, but it doesn't seem worth
    3030             :          * the trouble; this is a corner case already, since usually the
    3031             :          * InitPlans would have been evaluated before reaching EvalPlanQual.)
    3032             :          *
    3033             :          * This will not touch output params of InitPlans that occur somewhere
    3034             :          * within the subplan tree, only those that are attached to the
    3035             :          * ModifyTable node or above it and are referenced within the subplan.
    3036             :          * That's OK though, because the planner would only attach such
    3037             :          * InitPlans to a lower-level SubqueryScan node, and EPQ execution
    3038             :          * will not descend into a SubqueryScan.
    3039             :          *
    3040             :          * The EState's per-output-tuple econtext is sufficiently short-lived
    3041             :          * for this, since it should get reset before there is any chance of
    3042             :          * doing EvalPlanQual again.
    3043             :          */
    3044         226 :         ExecSetParamPlanMulti(planTree->extParam,
    3045         226 :                               GetPerTupleExprContext(parentestate));
    3046             : 
    3047             :         /* now make the internal param workspace ... */
    3048         226 :         i = list_length(parentestate->es_plannedstmt->paramExecTypes);
    3049         226 :         rcestate->es_param_exec_vals = (ParamExecData *)
    3050         226 :             palloc0(i * sizeof(ParamExecData));
    3051             :         /* ... and copy down all values, whether really needed or not */
    3052         550 :         while (--i >= 0)
    3053             :         {
    3054             :             /* copy value if any, but not execPlan link */
    3055         324 :             rcestate->es_param_exec_vals[i].value =
    3056         324 :                 parentestate->es_param_exec_vals[i].value;
    3057         324 :             rcestate->es_param_exec_vals[i].isnull =
    3058         324 :                 parentestate->es_param_exec_vals[i].isnull;
    3059             :         }
    3060             :     }
    3061             : 
    3062             :     /*
    3063             :      * Copy es_unpruned_relids so that pruned relations are ignored by
    3064             :      * ExecInitLockRows() and ExecInitModifyTable() when initializing the plan
    3065             :      * trees below.
    3066             :      */
    3067         226 :     rcestate->es_unpruned_relids = parentestate->es_unpruned_relids;
    3068             : 
    3069             :     /*
    3070             :      * Initialize private state information for each SubPlan.  We must do this
    3071             :      * before running ExecInitNode on the main query tree, since
    3072             :      * ExecInitSubPlan expects to be able to find these entries. Some of the
    3073             :      * SubPlans might not be used in the part of the plan tree we intend to
    3074             :      * run, but since it's not easy to tell which, we just initialize them
    3075             :      * all.
    3076             :      */
    3077             :     Assert(rcestate->es_subplanstates == NIL);
    3078         282 :     foreach(l, parentestate->es_plannedstmt->subplans)
    3079             :     {
    3080          56 :         Plan       *subplan = (Plan *) lfirst(l);
    3081             :         PlanState  *subplanstate;
    3082             : 
    3083          56 :         subplanstate = ExecInitNode(subplan, rcestate, 0);
    3084          56 :         rcestate->es_subplanstates = lappend(rcestate->es_subplanstates,
    3085             :                                              subplanstate);
    3086             :     }
    3087             : 
    3088             :     /*
    3089             :      * Build an RTI indexed array of rowmarks, so that
    3090             :      * EvalPlanQualFetchRowMark() can efficiently access the to be fetched
    3091             :      * rowmark.
    3092             :      */
    3093         226 :     epqstate->relsubs_rowmark = (ExecAuxRowMark **)
    3094         226 :         palloc0(rtsize * sizeof(ExecAuxRowMark *));
    3095         238 :     foreach(l, epqstate->arowMarks)
    3096             :     {
    3097          12 :         ExecAuxRowMark *earm = (ExecAuxRowMark *) lfirst(l);
    3098             : 
    3099          12 :         epqstate->relsubs_rowmark[earm->rowmark->rti - 1] = earm;
    3100             :     }
    3101             : 
    3102             :     /*
    3103             :      * Initialize per-relation EPQ tuple states.  Result relations, if any,
    3104             :      * get marked as blocked; others as not-fetched.
    3105             :      */
    3106         226 :     epqstate->relsubs_done = palloc_array(bool, rtsize);
    3107         226 :     epqstate->relsubs_blocked = palloc0_array(bool, rtsize);
    3108             : 
    3109         452 :     foreach(l, epqstate->resultRelations)
    3110             :     {
    3111         226 :         int         rtindex = lfirst_int(l);
    3112             : 
    3113             :         Assert(rtindex > 0 && rtindex <= rtsize);
    3114         226 :         epqstate->relsubs_blocked[rtindex - 1] = true;
    3115             :     }
    3116             : 
    3117         226 :     memcpy(epqstate->relsubs_done, epqstate->relsubs_blocked,
    3118             :            rtsize * sizeof(bool));
    3119             : 
    3120             :     /*
    3121             :      * Initialize the private state information for all the nodes in the part
    3122             :      * of the plan tree we need to run.  This opens files, allocates storage
    3123             :      * and leaves us ready to start processing tuples.
    3124             :      */
    3125         226 :     epqstate->recheckplanstate = ExecInitNode(planTree, rcestate, 0);
    3126             : 
    3127         226 :     MemoryContextSwitchTo(oldcontext);
    3128         226 : }
    3129             : 
    3130             : /*
    3131             :  * EvalPlanQualEnd -- shut down at termination of parent plan state node,
    3132             :  * or if we are done with the current EPQ child.
    3133             :  *
    3134             :  * This is a cut-down version of ExecutorEnd(); basically we want to do most
    3135             :  * of the normal cleanup, but *not* close result relations (which we are
    3136             :  * just sharing from the outer query).  We do, however, have to close any
    3137             :  * result and trigger target relations that got opened, since those are not
    3138             :  * shared.  (There probably shouldn't be any of the latter, but just in
    3139             :  * case...)
    3140             :  */
    3141             : void
    3142      381750 : EvalPlanQualEnd(EPQState *epqstate)
    3143             : {
    3144      381750 :     EState     *estate = epqstate->recheckestate;
    3145             :     Index       rtsize;
    3146             :     MemoryContext oldcontext;
    3147             :     ListCell   *l;
    3148             : 
    3149      381750 :     rtsize = epqstate->parentestate->es_range_table_size;
    3150             : 
    3151             :     /*
    3152             :      * We may have a tuple table, even if EPQ wasn't started, because we allow
    3153             :      * use of EvalPlanQualSlot() without calling EvalPlanQualBegin().
    3154             :      */
    3155      381750 :     if (epqstate->tuple_table != NIL)
    3156             :     {
    3157        5730 :         memset(epqstate->relsubs_slot, 0,
    3158             :                rtsize * sizeof(TupleTableSlot *));
    3159        5730 :         ExecResetTupleTable(epqstate->tuple_table, true);
    3160        5730 :         epqstate->tuple_table = NIL;
    3161             :     }
    3162             : 
    3163             :     /* EPQ wasn't started, nothing further to do */
    3164      381750 :     if (estate == NULL)
    3165      381536 :         return;
    3166             : 
    3167         214 :     oldcontext = MemoryContextSwitchTo(estate->es_query_cxt);
    3168             : 
    3169         214 :     ExecEndNode(epqstate->recheckplanstate);
    3170             : 
    3171         264 :     foreach(l, estate->es_subplanstates)
    3172             :     {
    3173          50 :         PlanState  *subplanstate = (PlanState *) lfirst(l);
    3174             : 
    3175          50 :         ExecEndNode(subplanstate);
    3176             :     }
    3177             : 
    3178             :     /* throw away the per-estate tuple table, some node may have used it */
    3179         214 :     ExecResetTupleTable(estate->es_tupleTable, false);
    3180             : 
    3181             :     /* Close any result and trigger target relations attached to this EState */
    3182         214 :     ExecCloseResultRelations(estate);
    3183             : 
    3184         214 :     MemoryContextSwitchTo(oldcontext);
    3185             : 
    3186         214 :     FreeExecutorState(estate);
    3187             : 
    3188             :     /* Mark EPQState idle */
    3189         214 :     epqstate->origslot = NULL;
    3190         214 :     epqstate->recheckestate = NULL;
    3191         214 :     epqstate->recheckplanstate = NULL;
    3192         214 :     epqstate->relsubs_rowmark = NULL;
    3193         214 :     epqstate->relsubs_done = NULL;
    3194         214 :     epqstate->relsubs_blocked = NULL;
    3195             : }

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