Age Owner Branch data TLA 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 ExecCheckPermissionsModified(Oid relOid, Oid userid,
88 : : Bitmapset *modifiedCols,
89 : : AclMode requiredPerms);
90 : : static void ExecCheckXactReadOnly(PlannedStmt *plannedstmt);
91 : : static void EvalPlanQualStart(EPQState *epqstate, Plan *planTree);
92 : : static void ReportNotNullViolationError(ResultRelInfo *resultRelInfo,
93 : : TupleTableSlot *slot,
94 : : EState *estate, int attnum);
95 : :
96 : : /* end of local decls */
97 : :
98 : :
99 : : /* ----------------------------------------------------------------
100 : : * ExecutorStart
101 : : *
102 : : * This routine must be called at the beginning of any execution of any
103 : : * query plan
104 : : *
105 : : * Takes a QueryDesc previously created by CreateQueryDesc (which is separate
106 : : * only because some places use QueryDescs for utility commands). The tupDesc
107 : : * field of the QueryDesc is filled in to describe the tuples that will be
108 : : * returned, and the internal fields (estate and planstate) are set up.
109 : : *
110 : : * eflags contains flag bits as described in executor.h.
111 : : *
112 : : * NB: the CurrentMemoryContext when this is called will become the parent
113 : : * of the per-query context used for this Executor invocation.
114 : : *
115 : : * We provide a function hook variable that lets loadable plugins
116 : : * get control when ExecutorStart is called. Such a plugin would
117 : : * normally call standard_ExecutorStart().
118 : : *
119 : : * ----------------------------------------------------------------
120 : : */
121 : : void
7130 tgl@sss.pgh.pa.us 122 :CBC 282199 : ExecutorStart(QueryDesc *queryDesc, int eflags)
123 : : {
124 : : /*
125 : : * In some cases (e.g. an EXECUTE statement or an execute message with the
126 : : * extended query protocol) the query_id won't be reported, so do it now.
127 : : *
128 : : * Note that it's harmless to report the query_id multiple times, as the
129 : : * call will be ignored if the top level query_id has already been
130 : : * reported.
131 : : */
1600 bruce@momjian.us 132 : 282199 : pgstat_report_query_id(queryDesc->plannedstmt->queryId, false);
133 : :
6135 tgl@sss.pgh.pa.us 134 [ + + ]: 282199 : if (ExecutorStart_hook)
107 amitlan@postgresql.o 135 : 59119 : (*ExecutorStart_hook) (queryDesc, eflags);
136 : : else
137 : 223080 : standard_ExecutorStart(queryDesc, eflags);
6135 tgl@sss.pgh.pa.us 138 : 281352 : }
139 : :
140 : : void
141 : 282199 : standard_ExecutorStart(QueryDesc *queryDesc, int eflags)
142 : : {
143 : : EState *estate;
144 : : MemoryContext oldcontext;
145 : :
146 : : /* sanity checks: queryDesc must not be started already */
10226 bruce@momjian.us 147 [ - + ]: 282199 : Assert(queryDesc != NULL);
8311 tgl@sss.pgh.pa.us 148 [ - + ]: 282199 : Assert(queryDesc->estate == NULL);
149 : :
150 : : /* caller must ensure the query's snapshot is active */
541 heikki.linnakangas@i 151 [ - + ]: 282199 : Assert(GetActiveSnapshot() == queryDesc->snapshot);
152 : :
153 : : /*
154 : : * If the transaction is read-only, we need to check if any writes are
155 : : * planned to non-temporary tables. EXPLAIN is considered read-only.
156 : : *
157 : : * Don't allow writes in parallel mode. Supporting UPDATE and DELETE
158 : : * would require (a) storing the combo CID hash in shared memory, rather
159 : : * than synchronizing it just once at the start of parallelism, and (b) an
160 : : * alternative to heap_update()'s reliance on xmax for mutual exclusion.
161 : : * INSERT may have no such troubles, but we forbid it to simplify the
162 : : * checks.
163 : : *
164 : : * We have lower-level defenses in CommandCounterIncrement and elsewhere
165 : : * against performing unsafe operations in parallel mode, but this gives a
166 : : * more user-friendly error message.
167 : : */
3782 rhaas@postgresql.org 168 [ + + + + ]: 282199 : if ((XactReadOnly || IsInParallelMode()) &&
169 [ + - ]: 33432 : !(eflags & EXEC_FLAG_EXPLAIN_ONLY))
6773 tgl@sss.pgh.pa.us 170 : 33432 : ExecCheckXactReadOnly(queryDesc->plannedstmt);
171 : :
172 : : /*
173 : : * Build EState, switch into per-query memory context for startup.
174 : : */
8311 175 : 282191 : estate = CreateExecutorState();
176 : 282191 : queryDesc->estate = estate;
177 : :
8301 178 : 282191 : oldcontext = MemoryContextSwitchTo(estate->es_query_cxt);
179 : :
180 : : /*
181 : : * Fill in external parameters, if any, from queryDesc; and allocate
182 : : * workspace for internal parameters
183 : : */
8311 184 : 282191 : estate->es_param_list_info = queryDesc->params;
185 : :
2854 rhaas@postgresql.org 186 [ + + ]: 282191 : if (queryDesc->plannedstmt->paramExecTypes != NIL)
187 : : {
188 : : int nParamExec;
189 : :
190 : 90273 : nParamExec = list_length(queryDesc->plannedstmt->paramExecTypes);
10054 bruce@momjian.us 191 : 90273 : estate->es_param_exec_vals = (ParamExecData *)
2854 rhaas@postgresql.org 192 : 90273 : palloc0(nParamExec * sizeof(ParamExecData));
193 : : }
194 : :
195 : : /* We now require all callers to provide sourceText */
1605 tgl@sss.pgh.pa.us 196 [ - + ]: 282191 : Assert(queryDesc->sourceText != NULL);
3118 rhaas@postgresql.org 197 : 282191 : estate->es_sourceText = queryDesc->sourceText;
198 : :
199 : : /*
200 : : * Fill in the query environment, if any, from queryDesc.
201 : : */
3081 kgrittn@postgresql.o 202 : 282191 : estate->es_queryEnv = queryDesc->queryEnv;
203 : :
204 : : /*
205 : : * If non-read-only query, set the command ID to mark output tuples with
206 : : */
6490 tgl@sss.pgh.pa.us 207 [ + + - ]: 282191 : switch (queryDesc->operation)
208 : : {
209 : 226454 : case CMD_SELECT:
210 : :
211 : : /*
212 : : * SELECT FOR [KEY] UPDATE/SHARE and modifying CTEs need to mark
213 : : * tuples
214 : : */
4919 215 [ + + ]: 226454 : if (queryDesc->plannedstmt->rowMarks != NIL ||
5307 216 [ + + ]: 222483 : queryDesc->plannedstmt->hasModifyingCTE)
6490 217 : 4040 : estate->es_output_cid = GetCurrentCommandId(true);
218 : :
219 : : /*
220 : : * A SELECT without modifying CTEs can't possibly queue triggers,
221 : : * so force skip-triggers mode. This is just a marginal efficiency
222 : : * hack, since AfterTriggerBeginQuery/AfterTriggerEndQuery aren't
223 : : * all that expensive, but we might as well do it.
224 : : */
5305 225 [ + + ]: 226454 : if (!queryDesc->plannedstmt->hasModifyingCTE)
226 : 226382 : eflags |= EXEC_FLAG_SKIP_TRIGGERS;
6490 227 : 226454 : break;
228 : :
229 : 55737 : case CMD_INSERT:
230 : : case CMD_DELETE:
231 : : case CMD_UPDATE:
232 : : case CMD_MERGE:
233 : 55737 : estate->es_output_cid = GetCurrentCommandId(true);
234 : 55737 : break;
235 : :
6490 tgl@sss.pgh.pa.us 236 :UBC 0 : default:
237 [ # # ]: 0 : elog(ERROR, "unrecognized operation code: %d",
238 : : (int) queryDesc->operation);
239 : : break;
240 : : }
241 : :
242 : : /*
243 : : * Copy other important information into the EState
244 : : */
6326 alvherre@alvh.no-ip. 245 :CBC 282191 : estate->es_snapshot = RegisterSnapshot(queryDesc->snapshot);
246 : 282191 : estate->es_crosscheck_snapshot = RegisterSnapshot(queryDesc->crosscheck_snapshot);
5305 tgl@sss.pgh.pa.us 247 : 282191 : estate->es_top_eflags = eflags;
5744 rhaas@postgresql.org 248 : 282191 : estate->es_instrument = queryDesc->instrument_options;
2722 tgl@sss.pgh.pa.us 249 : 282191 : estate->es_jit_flags = queryDesc->plannedstmt->jitFlags;
250 : :
251 : : /*
252 : : * Set up an AFTER-trigger statement context, unless told not to, or
253 : : * unless it's EXPLAIN-only mode (when ExecutorFinish won't be called).
254 : : */
5305 255 [ + + ]: 282191 : if (!(eflags & (EXEC_FLAG_SKIP_TRIGGERS | EXEC_FLAG_EXPLAIN_ONLY)))
256 : 54993 : AfterTriggerBeginQuery();
257 : :
258 : : /*
259 : : * Initialize the plan state tree
260 : : */
2912 261 : 282191 : InitPlan(queryDesc, eflags);
262 : :
8301 263 : 281352 : MemoryContextSwitchTo(oldcontext);
10651 scrappy@hub.org 264 : 281352 : }
265 : :
266 : : /* ----------------------------------------------------------------
267 : : * ExecutorRun
268 : : *
269 : : * This is the main routine of the executor module. It accepts
270 : : * the query descriptor from the traffic cop and executes the
271 : : * query plan.
272 : : *
273 : : * ExecutorStart must have been called already.
274 : : *
275 : : * If direction is NoMovementScanDirection then nothing is done
276 : : * except to start up/shut down the destination. Otherwise,
277 : : * we retrieve up to 'count' tuples in the specified direction.
278 : : *
279 : : * Note: count = 0 is interpreted as no portal limit, i.e., run to
280 : : * completion. Also note that the count limit is only applied to
281 : : * retrieved tuples, not for instance to those inserted/updated/deleted
282 : : * by a ModifyTable plan node.
283 : : *
284 : : * There is no return value, but output tuples (if any) are sent to
285 : : * the destination receiver specified in the QueryDesc; and the number
286 : : * of tuples processed at the top level can be found in
287 : : * estate->es_processed. The total number of tuples processed in all
288 : : * the ExecutorRun calls can be found in estate->es_total_processed.
289 : : *
290 : : * We provide a function hook variable that lets loadable plugins
291 : : * get control when ExecutorRun is called. Such a plugin would
292 : : * normally call standard_ExecutorRun().
293 : : *
294 : : * ----------------------------------------------------------------
295 : : */
296 : : void
8311 tgl@sss.pgh.pa.us 297 : 277215 : ExecutorRun(QueryDesc *queryDesc,
298 : : ScanDirection direction, uint64 count)
299 : : {
6259 300 [ + + ]: 277215 : if (ExecutorRun_hook)
271 301 : 57580 : (*ExecutorRun_hook) (queryDesc, direction, count);
302 : : else
303 : 219635 : standard_ExecutorRun(queryDesc, direction, count);
6259 304 : 265294 : }
305 : :
306 : : void
307 : 277215 : standard_ExecutorRun(QueryDesc *queryDesc,
308 : : ScanDirection direction, uint64 count)
309 : : {
310 : : EState *estate;
311 : : CmdType operation;
312 : : DestReceiver *dest;
313 : : bool sendTuples;
314 : : MemoryContext oldcontext;
315 : :
316 : : /* sanity checks */
8301 317 [ - + ]: 277215 : Assert(queryDesc != NULL);
318 : :
319 : 277215 : estate = queryDesc->estate;
320 : :
321 [ - + ]: 277215 : Assert(estate != NULL);
5305 322 [ - + ]: 277215 : Assert(!(estate->es_top_eflags & EXEC_FLAG_EXPLAIN_ONLY));
323 : :
324 : : /* caller must ensure the query's snapshot is active */
541 heikki.linnakangas@i 325 [ - + ]: 277215 : Assert(GetActiveSnapshot() == estate->es_snapshot);
326 : :
327 : : /*
328 : : * Switch into per-query memory context
329 : : */
8301 tgl@sss.pgh.pa.us 330 : 277215 : oldcontext = MemoryContextSwitchTo(estate->es_query_cxt);
331 : :
332 : : /* Allow instrumentation of Executor overall runtime */
6135 333 [ + + ]: 277215 : if (queryDesc->totaltime)
334 : 39736 : InstrStartNode(queryDesc->totaltime);
335 : :
336 : : /*
337 : : * extract information from the query descriptor and the query feature.
338 : : */
10226 bruce@momjian.us 339 : 277215 : operation = queryDesc->operation;
340 : 277215 : dest = queryDesc->dest;
341 : :
342 : : /*
343 : : * startup tuple receiver, if we will be emitting tuples
344 : : */
8592 tgl@sss.pgh.pa.us 345 : 277215 : estate->es_processed = 0;
346 : :
6965 347 [ + + ]: 331943 : sendTuples = (operation == CMD_SELECT ||
5810 348 [ + + ]: 54728 : queryDesc->plannedstmt->hasReturning);
349 : :
6965 350 [ + + ]: 277215 : if (sendTuples)
2921 peter_e@gmx.net 351 : 224569 : dest->rStartup(dest, operation, queryDesc->tupDesc);
352 : :
353 : : /*
354 : : * Run plan, unless direction is NoMovement.
355 : : *
356 : : * Note: pquery.c selects NoMovement if a prior call already reached
357 : : * end-of-data in the user-specified fetch direction. This is important
358 : : * because various parts of the executor can misbehave if called again
359 : : * after reporting EOF. For example, heapam.c would actually restart a
360 : : * heapscan and return all its data afresh. There is also some doubt
361 : : * about whether a parallel plan would operate properly if an additional,
362 : : * necessarily non-parallel execution request occurs after completing a
363 : : * parallel execution. (That case should work, but it's untested.)
364 : : */
6154 tgl@sss.pgh.pa.us 365 [ + + ]: 277196 : if (!ScanDirectionIsNoMovement(direction))
271 366 : 276584 : ExecutePlan(queryDesc,
367 : : operation,
368 : : sendTuples,
369 : : count,
370 : : direction,
371 : : dest);
372 : :
373 : : /*
374 : : * Update es_total_processed to keep track of the number of tuples
375 : : * processed across multiple ExecutorRun() calls.
376 : : */
884 michael@paquier.xyz 377 : 265294 : estate->es_total_processed += estate->es_processed;
378 : :
379 : : /*
380 : : * shutdown tuple receiver, if we started it
381 : : */
6965 tgl@sss.pgh.pa.us 382 [ + + ]: 265294 : if (sendTuples)
2921 peter_e@gmx.net 383 : 214210 : dest->rShutdown(dest);
384 : :
6135 tgl@sss.pgh.pa.us 385 [ + + ]: 265294 : if (queryDesc->totaltime)
386 : 38377 : InstrStopNode(queryDesc->totaltime, estate->es_processed);
387 : :
8301 388 : 265294 : MemoryContextSwitchTo(oldcontext);
10651 scrappy@hub.org 389 : 265294 : }
390 : :
391 : : /* ----------------------------------------------------------------
392 : : * ExecutorFinish
393 : : *
394 : : * This routine must be called after the last ExecutorRun call.
395 : : * It performs cleanup such as firing AFTER triggers. It is
396 : : * separate from ExecutorEnd because EXPLAIN ANALYZE needs to
397 : : * include these actions in the total runtime.
398 : : *
399 : : * We provide a function hook variable that lets loadable plugins
400 : : * get control when ExecutorFinish is called. Such a plugin would
401 : : * normally call standard_ExecutorFinish().
402 : : *
403 : : * ----------------------------------------------------------------
404 : : */
405 : : void
5305 tgl@sss.pgh.pa.us 406 : 258147 : ExecutorFinish(QueryDesc *queryDesc)
407 : : {
408 [ + + ]: 258147 : if (ExecutorFinish_hook)
409 : 52192 : (*ExecutorFinish_hook) (queryDesc);
410 : : else
411 : 205955 : standard_ExecutorFinish(queryDesc);
412 : 257597 : }
413 : :
414 : : void
415 : 258147 : standard_ExecutorFinish(QueryDesc *queryDesc)
416 : : {
417 : : EState *estate;
418 : : MemoryContext oldcontext;
419 : :
420 : : /* sanity checks */
421 [ - + ]: 258147 : Assert(queryDesc != NULL);
422 : :
423 : 258147 : estate = queryDesc->estate;
424 : :
425 [ - + ]: 258147 : Assert(estate != NULL);
426 [ - + ]: 258147 : Assert(!(estate->es_top_eflags & EXEC_FLAG_EXPLAIN_ONLY));
427 : :
428 : : /* This should be run once and only once per Executor instance */
107 amitlan@postgresql.o 429 [ - + ]: 258147 : Assert(!estate->es_finished);
430 : :
431 : : /* Switch into per-query memory context */
5305 tgl@sss.pgh.pa.us 432 : 258147 : oldcontext = MemoryContextSwitchTo(estate->es_query_cxt);
433 : :
434 : : /* Allow instrumentation of Executor overall runtime */
435 [ + + ]: 258147 : if (queryDesc->totaltime)
436 : 38377 : InstrStartNode(queryDesc->totaltime);
437 : :
438 : : /* Run ModifyTable nodes to completion */
439 : 258147 : ExecPostprocessPlan(estate);
440 : :
441 : : /* Execute queued AFTER triggers, unless told not to */
442 [ + + ]: 258147 : if (!(estate->es_top_eflags & EXEC_FLAG_SKIP_TRIGGERS))
443 : 52864 : AfterTriggerEndQuery(estate);
444 : :
445 [ + + ]: 257597 : if (queryDesc->totaltime)
446 : 38216 : InstrStopNode(queryDesc->totaltime, 0);
447 : :
448 : 257597 : MemoryContextSwitchTo(oldcontext);
449 : :
450 : 257597 : estate->es_finished = true;
451 : 257597 : }
452 : :
453 : : /* ----------------------------------------------------------------
454 : : * ExecutorEnd
455 : : *
456 : : * This routine must be called at the end of execution of any
457 : : * query plan
458 : : *
459 : : * We provide a function hook variable that lets loadable plugins
460 : : * get control when ExecutorEnd is called. Such a plugin would
461 : : * normally call standard_ExecutorEnd().
462 : : *
463 : : * ----------------------------------------------------------------
464 : : */
465 : : void
8311 466 : 267858 : ExecutorEnd(QueryDesc *queryDesc)
467 : : {
6135 468 [ + + ]: 267858 : if (ExecutorEnd_hook)
469 : 54921 : (*ExecutorEnd_hook) (queryDesc);
470 : : else
471 : 212937 : standard_ExecutorEnd(queryDesc);
472 : 267858 : }
473 : :
474 : : void
475 : 267858 : standard_ExecutorEnd(QueryDesc *queryDesc)
476 : : {
477 : : EState *estate;
478 : : MemoryContext oldcontext;
479 : :
480 : : /* sanity checks */
10226 bruce@momjian.us 481 [ - + ]: 267858 : Assert(queryDesc != NULL);
482 : :
8311 tgl@sss.pgh.pa.us 483 : 267858 : estate = queryDesc->estate;
484 : :
8301 485 [ - + ]: 267858 : Assert(estate != NULL);
486 : :
299 michael@paquier.xyz 487 [ + + ]: 267858 : if (estate->es_parallel_workers_to_launch > 0)
488 : 342 : pgstat_update_parallel_workers_stats((PgStat_Counter) estate->es_parallel_workers_to_launch,
489 : 342 : (PgStat_Counter) estate->es_parallel_workers_launched);
490 : :
491 : : /*
492 : : * Check that ExecutorFinish was called, unless in EXPLAIN-only mode. This
493 : : * Assert is needed because ExecutorFinish is new as of 9.1, and callers
494 : : * might forget to call it.
495 : : */
107 amitlan@postgresql.o 496 [ + + - + ]: 267858 : Assert(estate->es_finished ||
497 : : (estate->es_top_eflags & EXEC_FLAG_EXPLAIN_ONLY));
498 : :
499 : : /*
500 : : * Switch into per-query memory context to run ExecEndPlan
501 : : */
8301 tgl@sss.pgh.pa.us 502 : 267858 : oldcontext = MemoryContextSwitchTo(estate->es_query_cxt);
503 : :
504 : 267858 : ExecEndPlan(queryDesc->planstate, estate);
505 : :
506 : : /* do away with our snapshots */
6326 alvherre@alvh.no-ip. 507 : 267858 : UnregisterSnapshot(estate->es_snapshot);
508 : 267858 : UnregisterSnapshot(estate->es_crosscheck_snapshot);
509 : :
510 : : /*
511 : : * Must switch out of context before destroying it
512 : : */
8301 tgl@sss.pgh.pa.us 513 : 267858 : MemoryContextSwitchTo(oldcontext);
514 : :
515 : : /*
516 : : * Release EState and per-query memory context. This should release
517 : : * everything the executor has allocated.
518 : : */
519 : 267858 : FreeExecutorState(estate);
520 : :
521 : : /* Reset queryDesc fields that no longer point to anything */
522 : 267858 : queryDesc->tupDesc = NULL;
523 : 267858 : queryDesc->estate = NULL;
524 : 267858 : queryDesc->planstate = NULL;
6135 525 : 267858 : queryDesc->totaltime = NULL;
9312 526 : 267858 : }
527 : :
528 : : /* ----------------------------------------------------------------
529 : : * ExecutorRewind
530 : : *
531 : : * This routine may be called on an open queryDesc to rewind it
532 : : * to the start.
533 : : * ----------------------------------------------------------------
534 : : */
535 : : void
8215 536 : 50 : ExecutorRewind(QueryDesc *queryDesc)
537 : : {
538 : : EState *estate;
539 : : MemoryContext oldcontext;
540 : :
541 : : /* sanity checks */
542 [ - + ]: 50 : Assert(queryDesc != NULL);
543 : :
544 : 50 : estate = queryDesc->estate;
545 : :
546 [ - + ]: 50 : Assert(estate != NULL);
547 : :
548 : : /* It's probably not sensible to rescan updating queries */
549 [ - + ]: 50 : Assert(queryDesc->operation == CMD_SELECT);
550 : :
551 : : /*
552 : : * Switch into per-query memory context
553 : : */
554 : 50 : oldcontext = MemoryContextSwitchTo(estate->es_query_cxt);
555 : :
556 : : /*
557 : : * rescan plan
558 : : */
5535 559 : 50 : ExecReScan(queryDesc->planstate);
560 : :
8215 561 : 50 : MemoryContextSwitchTo(oldcontext);
562 : 50 : }
563 : :
564 : :
565 : : /*
566 : : * ExecCheckPermissions
567 : : * Check access permissions of relations mentioned in a query
568 : : *
569 : : * Returns true if permissions are adequate. Otherwise, throws an appropriate
570 : : * error if ereport_on_violation is true, or simply returns false otherwise.
571 : : *
572 : : * Note that this does NOT address row-level security policies (aka: RLS). If
573 : : * rows will be returned to the user as a result of this permission check
574 : : * passing, then RLS also needs to be consulted (and check_enable_rls()).
575 : : *
576 : : * See rewrite/rowsecurity.c.
577 : : *
578 : : * NB: rangeTable is no longer used by us, but kept around for the hooks that
579 : : * might still want to look at the RTEs.
580 : : */
581 : : bool
1005 alvherre@alvh.no-ip. 582 : 288301 : ExecCheckPermissions(List *rangeTable, List *rteperminfos,
583 : : bool ereport_on_violation)
584 : : {
585 : : ListCell *l;
5525 rhaas@postgresql.org 586 : 288301 : bool result = true;
587 : :
588 : : #ifdef USE_ASSERT_CHECKING
856 alvherre@alvh.no-ip. 589 : 288301 : Bitmapset *indexset = NULL;
590 : :
591 : : /* Check that rteperminfos is consistent with rangeTable */
592 [ + - + + : 837003 : foreach(l, rangeTable)
+ + ]
593 : : {
594 : 548702 : RangeTblEntry *rte = lfirst_node(RangeTblEntry, l);
595 : :
596 [ + + ]: 548702 : if (rte->perminfoindex != 0)
597 : : {
598 : : /* Sanity checks */
599 : :
600 : : /*
601 : : * Only relation RTEs and subquery RTEs that were once relation
602 : : * RTEs (views) have their perminfoindex set.
603 : : */
816 amitlan@postgresql.o 604 [ + + + - : 274763 : Assert(rte->rtekind == RTE_RELATION ||
- + ]
605 : : (rte->rtekind == RTE_SUBQUERY &&
606 : : rte->relkind == RELKIND_VIEW));
607 : :
856 alvherre@alvh.no-ip. 608 : 274763 : (void) getRTEPermissionInfo(rteperminfos, rte);
609 : : /* Many-to-one mapping not allowed */
610 [ - + ]: 274763 : Assert(!bms_is_member(rte->perminfoindex, indexset));
611 : 274763 : indexset = bms_add_member(indexset, rte->perminfoindex);
612 : : }
613 : : }
614 : :
615 : : /* All rteperminfos are referenced */
616 [ - + ]: 288301 : Assert(bms_num_members(indexset) == list_length(rteperminfos));
617 : : #endif
618 : :
1005 619 [ + + + + : 562291 : foreach(l, rteperminfos)
+ + ]
620 : : {
621 : 274646 : RTEPermissionInfo *perminfo = lfirst_node(RTEPermissionInfo, l);
622 : :
623 [ - + ]: 274646 : Assert(OidIsValid(perminfo->relid));
624 : 274646 : result = ExecCheckOneRelPerms(perminfo);
5525 rhaas@postgresql.org 625 [ + + ]: 274646 : if (!result)
626 : : {
627 [ + + ]: 656 : if (ereport_on_violation)
1005 alvherre@alvh.no-ip. 628 : 650 : aclcheck_error(ACLCHECK_NO_PRIV,
629 : 650 : get_relkind_objtype(get_rel_relkind(perminfo->relid)),
630 : 650 : get_rel_name(perminfo->relid));
5525 rhaas@postgresql.org 631 : 6 : return false;
632 : : }
633 : : }
634 : :
5538 635 [ + + ]: 287645 : if (ExecutorCheckPerms_hook)
1005 alvherre@alvh.no-ip. 636 : 6 : result = (*ExecutorCheckPerms_hook) (rangeTable, rteperminfos,
637 : : ereport_on_violation);
5525 rhaas@postgresql.org 638 : 287645 : return result;
639 : : }
640 : :
641 : : /*
642 : : * ExecCheckOneRelPerms
643 : : * Check access permissions for a single relation.
644 : : */
645 : : bool
1005 alvherre@alvh.no-ip. 646 : 284628 : ExecCheckOneRelPerms(RTEPermissionInfo *perminfo)
647 : : {
648 : : AclMode requiredPerms;
649 : : AclMode relPerms;
650 : : AclMode remainingPerms;
651 : : Oid userid;
652 : 284628 : Oid relOid = perminfo->relid;
653 : :
654 : 284628 : requiredPerms = perminfo->requiredPerms;
655 [ - + ]: 284628 : Assert(requiredPerms != 0);
656 : :
657 : : /*
658 : : * userid to check as: current user unless we have a setuid indication.
659 : : *
660 : : * Note: GetUserId() is presently fast enough that there's no harm in
661 : : * calling it separately for each relation. If that stops being true, we
662 : : * could call it once in ExecCheckPermissions and pass the userid down
663 : : * from there. But for now, no need for the extra clutter.
664 : : */
665 : 569256 : userid = OidIsValid(perminfo->checkAsUser) ?
666 [ + + ]: 284628 : perminfo->checkAsUser : GetUserId();
667 : :
668 : : /*
669 : : * We must have *all* the requiredPerms bits, but some of the bits can be
670 : : * satisfied from column-level rather than relation-level permissions.
671 : : * First, remove any bits that are satisfied by relation permissions.
672 : : */
6071 tgl@sss.pgh.pa.us 673 : 284628 : relPerms = pg_class_aclmask(relOid, userid, requiredPerms, ACLMASK_ALL);
674 : 284628 : remainingPerms = requiredPerms & ~relPerms;
675 [ + + ]: 284628 : if (remainingPerms != 0)
676 : : {
3774 andres@anarazel.de 677 : 1436 : int col = -1;
678 : :
679 : : /*
680 : : * If we lack any permissions that exist only as relation permissions,
681 : : * we can fail straight away.
682 : : */
6071 tgl@sss.pgh.pa.us 683 [ + + ]: 1436 : if (remainingPerms & ~(ACL_SELECT | ACL_INSERT | ACL_UPDATE))
5525 rhaas@postgresql.org 684 : 78 : return false;
685 : :
686 : : /*
687 : : * Check to see if we have the needed privileges at column level.
688 : : *
689 : : * Note: failures just report a table-level error; it would be nicer
690 : : * to report a column-level error if we have some but not all of the
691 : : * column privileges.
692 : : */
6071 tgl@sss.pgh.pa.us 693 [ + + ]: 1358 : if (remainingPerms & ACL_SELECT)
694 : : {
695 : : /*
696 : : * When the query doesn't explicitly reference any columns (for
697 : : * example, SELECT COUNT(*) FROM table), allow the query if we
698 : : * have SELECT on any column of the rel, as per SQL spec.
699 : : */
1005 alvherre@alvh.no-ip. 700 [ + + ]: 754 : if (bms_is_empty(perminfo->selectedCols))
701 : : {
6071 tgl@sss.pgh.pa.us 702 [ + + ]: 28 : if (pg_attribute_aclcheck_all(relOid, userid, ACL_SELECT,
703 : : ACLMASK_ANY) != ACLCHECK_OK)
5525 rhaas@postgresql.org 704 : 7 : return false;
705 : : }
706 : :
1005 alvherre@alvh.no-ip. 707 [ + + ]: 1213 : while ((col = bms_next_member(perminfo->selectedCols, col)) >= 0)
708 : : {
709 : : /* bit #s are offset by FirstLowInvalidHeapAttributeNumber */
3935 tgl@sss.pgh.pa.us 710 : 951 : AttrNumber attno = col + FirstLowInvalidHeapAttributeNumber;
711 : :
712 [ + + ]: 951 : if (attno == InvalidAttrNumber)
713 : : {
714 : : /* Whole-row reference, must have priv on all cols */
6071 715 [ + + ]: 33 : if (pg_attribute_aclcheck_all(relOid, userid, ACL_SELECT,
716 : : ACLMASK_ALL) != ACLCHECK_OK)
5525 rhaas@postgresql.org 717 : 21 : return false;
718 : : }
719 : : else
720 : : {
3935 tgl@sss.pgh.pa.us 721 [ + + ]: 918 : if (pg_attribute_aclcheck(relOid, attno, userid,
722 : : ACL_SELECT) != ACLCHECK_OK)
5525 rhaas@postgresql.org 723 : 464 : return false;
724 : : }
725 : : }
726 : : }
727 : :
728 : : /*
729 : : * Basically the same for the mod columns, for both INSERT and UPDATE
730 : : * privilege as specified by remainingPerms.
731 : : */
1005 alvherre@alvh.no-ip. 732 [ + + ]: 866 : if (remainingPerms & ACL_INSERT &&
733 [ + + ]: 154 : !ExecCheckPermissionsModified(relOid,
734 : : userid,
735 : : perminfo->insertedCols,
736 : : ACL_INSERT))
3774 andres@anarazel.de 737 : 88 : return false;
738 : :
1005 alvherre@alvh.no-ip. 739 [ + + ]: 778 : if (remainingPerms & ACL_UPDATE &&
740 [ + + ]: 570 : !ExecCheckPermissionsModified(relOid,
741 : : userid,
742 : : perminfo->updatedCols,
743 : : ACL_UPDATE))
3774 andres@anarazel.de 744 : 192 : return false;
745 : : }
746 : 283778 : return true;
747 : : }
748 : :
749 : : /*
750 : : * ExecCheckPermissionsModified
751 : : * Check INSERT or UPDATE access permissions for a single relation (these
752 : : * are processed uniformly).
753 : : */
754 : : static bool
1005 alvherre@alvh.no-ip. 755 : 724 : ExecCheckPermissionsModified(Oid relOid, Oid userid, Bitmapset *modifiedCols,
756 : : AclMode requiredPerms)
757 : : {
3774 andres@anarazel.de 758 : 724 : int col = -1;
759 : :
760 : : /*
761 : : * When the query doesn't explicitly update any columns, allow the query
762 : : * if we have permission on any column of the rel. This is to handle
763 : : * SELECT FOR UPDATE as well as possible corner cases in UPDATE.
764 : : */
765 [ + + ]: 724 : if (bms_is_empty(modifiedCols))
766 : : {
767 [ + - ]: 24 : if (pg_attribute_aclcheck_all(relOid, userid, requiredPerms,
768 : : ACLMASK_ANY) != ACLCHECK_OK)
769 : 24 : return false;
770 : : }
771 : :
772 [ + + ]: 1219 : while ((col = bms_next_member(modifiedCols, col)) >= 0)
773 : : {
774 : : /* bit #s are offset by FirstLowInvalidHeapAttributeNumber */
775 : 775 : AttrNumber attno = col + FirstLowInvalidHeapAttributeNumber;
776 : :
777 [ - + ]: 775 : if (attno == InvalidAttrNumber)
778 : : {
779 : : /* whole-row reference can't happen here */
3774 andres@anarazel.de 780 [ # # ]:UBC 0 : elog(ERROR, "whole-row update is not implemented");
781 : : }
782 : : else
783 : : {
3774 andres@anarazel.de 784 [ + + ]:CBC 775 : if (pg_attribute_aclcheck(relOid, attno, userid,
785 : : requiredPerms) != ACLCHECK_OK)
786 : 256 : return false;
787 : : }
788 : : }
5525 rhaas@postgresql.org 789 : 444 : return true;
790 : : }
791 : :
792 : : /*
793 : : * Check that the query does not imply any writes to non-temp tables;
794 : : * unless we're in parallel mode, in which case don't even allow writes
795 : : * to temp tables.
796 : : *
797 : : * Note: in a Hot Standby this would need to reject writes to temp
798 : : * tables just as we do in parallel mode; but an HS standby can't have created
799 : : * any temp tables in the first place, so no need to check that.
800 : : */
801 : : static void
6505 bruce@momjian.us 802 : 33432 : ExecCheckXactReadOnly(PlannedStmt *plannedstmt)
803 : : {
804 : : ListCell *l;
805 : :
806 : : /*
807 : : * Fail if write permissions are requested in parallel mode for table
808 : : * (temp or non-temp), otherwise fail for any non-temp table.
809 : : */
1005 alvherre@alvh.no-ip. 810 [ + + + + : 86494 : foreach(l, plannedstmt->permInfos)
+ + ]
811 : : {
812 : 53070 : RTEPermissionInfo *perminfo = lfirst_node(RTEPermissionInfo, l);
813 : :
814 [ + + ]: 53070 : if ((perminfo->requiredPerms & (~ACL_SELECT)) == 0)
7906 tgl@sss.pgh.pa.us 815 : 53056 : continue;
816 : :
1005 alvherre@alvh.no-ip. 817 [ + + ]: 14 : if (isTempNamespace(get_rel_namespace(perminfo->relid)))
7906 tgl@sss.pgh.pa.us 818 : 6 : continue;
819 : :
2014 alvherre@alvh.no-ip. 820 : 8 : PreventCommandIfReadOnly(CreateCommandName((Node *) plannedstmt));
821 : : }
822 : :
3782 rhaas@postgresql.org 823 [ + + - + ]: 33424 : if (plannedstmt->commandType != CMD_SELECT || plannedstmt->hasModifyingCTE)
2014 alvherre@alvh.no-ip. 824 : 6 : PreventCommandIfParallelMode(CreateCommandName((Node *) plannedstmt));
8275 peter_e@gmx.net 825 : 33424 : }
826 : :
827 : :
828 : : /* ----------------------------------------------------------------
829 : : * InitPlan
830 : : *
831 : : * Initializes the query plan: open files, allocate storage
832 : : * and start up the rule manager
833 : : * ----------------------------------------------------------------
834 : : */
835 : : static void
7130 tgl@sss.pgh.pa.us 836 : 282191 : InitPlan(QueryDesc *queryDesc, int eflags)
837 : : {
8311 838 : 282191 : CmdType operation = queryDesc->operation;
6773 839 : 282191 : PlannedStmt *plannedstmt = queryDesc->plannedstmt;
840 : 282191 : Plan *plan = plannedstmt->planTree;
841 : 282191 : List *rangeTable = plannedstmt->rtable;
8069 bruce@momjian.us 842 : 282191 : EState *estate = queryDesc->estate;
843 : : PlanState *planstate;
844 : : TupleDesc tupType;
845 : : ListCell *l;
846 : : int i;
847 : :
848 : : /*
849 : : * Do permissions checks
850 : : */
1005 alvherre@alvh.no-ip. 851 : 282191 : ExecCheckPermissions(rangeTable, plannedstmt->permInfos, true);
852 : :
853 : : /*
854 : : * initialize the node's execution state
855 : : */
211 amitlan@postgresql.o 856 : 281583 : ExecInitRangeTable(estate, rangeTable, plannedstmt->permInfos,
857 : 281583 : bms_copy(plannedstmt->unprunableRelids));
858 : :
5794 tgl@sss.pgh.pa.us 859 : 281583 : estate->es_plannedstmt = plannedstmt;
219 amitlan@postgresql.o 860 : 281583 : estate->es_part_prune_infos = plannedstmt->partPruneInfos;
861 : :
862 : : /*
863 : : * Perform runtime "initial" pruning to identify which child subplans,
864 : : * corresponding to the children of plan nodes that contain
865 : : * PartitionPruneInfo such as Append, will not be executed. The results,
866 : : * which are bitmapsets of indexes of the child subplans that will be
867 : : * executed, are saved in es_part_prune_results. These results correspond
868 : : * to each PartitionPruneInfo entry, and the es_part_prune_results list is
869 : : * parallel to es_part_prune_infos.
870 : : */
218 871 : 281583 : ExecDoInitialPruning(estate);
872 : :
873 : : /*
874 : : * Next, build the ExecRowMark array from the PlanRowMark(s), if any.
875 : : */
2525 tgl@sss.pgh.pa.us 876 [ + + ]: 281583 : if (plannedstmt->rowMarks)
877 : : {
878 : 5016 : estate->es_rowmarks = (ExecRowMark **)
879 : 5016 : palloc0(estate->es_range_table_size * sizeof(ExecRowMark *));
880 [ + - + + : 11714 : foreach(l, plannedstmt->rowMarks)
+ + ]
881 : : {
882 : 6701 : PlanRowMark *rc = (PlanRowMark *) lfirst(l);
883 : : Oid relid;
884 : : Relation relation;
885 : : ExecRowMark *erm;
886 : :
887 : : /*
888 : : * Ignore "parent" rowmarks, because they are irrelevant at
889 : : * runtime. Also ignore the rowmarks belonging to child tables
890 : : * that have been pruned in ExecDoInitialPruning().
891 : : */
211 amitlan@postgresql.o 892 [ + + ]: 6701 : if (rc->isParent ||
893 [ + + ]: 5746 : !bms_is_member(rc->rti, estate->es_unpruned_relids))
2525 tgl@sss.pgh.pa.us 894 : 1219 : continue;
895 : :
896 : : /* get relation's OID (will produce InvalidOid if subquery) */
897 : 5482 : relid = exec_rt_fetch(rc->rti, estate)->relid;
898 : :
899 : : /* open relation, if we need to access it for this mark type */
900 [ + + - ]: 5482 : switch (rc->markType)
901 : : {
902 : 5320 : case ROW_MARK_EXCLUSIVE:
903 : : case ROW_MARK_NOKEYEXCLUSIVE:
904 : : case ROW_MARK_SHARE:
905 : : case ROW_MARK_KEYSHARE:
906 : : case ROW_MARK_REFERENCE:
171 amitlan@postgresql.o 907 : 5320 : relation = ExecGetRangeTableRelation(estate, rc->rti, false);
2525 tgl@sss.pgh.pa.us 908 : 5320 : break;
909 : 162 : case ROW_MARK_COPY:
910 : : /* no physical table access is required */
911 : 162 : relation = NULL;
912 : 162 : break;
2525 tgl@sss.pgh.pa.us 913 :UBC 0 : default:
914 [ # # ]: 0 : elog(ERROR, "unrecognized markType: %d", rc->markType);
915 : : relation = NULL; /* keep compiler quiet */
916 : : break;
917 : : }
918 : :
919 : : /* Check that relation is a legal target for marking */
2525 tgl@sss.pgh.pa.us 920 [ + + ]:CBC 5482 : if (relation)
921 : 5320 : CheckValidRowMarkRel(relation, rc->markType);
922 : :
923 : 5479 : erm = (ExecRowMark *) palloc(sizeof(ExecRowMark));
924 : 5479 : erm->relation = relation;
925 : 5479 : erm->relid = relid;
926 : 5479 : erm->rti = rc->rti;
927 : 5479 : erm->prti = rc->prti;
928 : 5479 : erm->rowmarkId = rc->rowmarkId;
929 : 5479 : erm->markType = rc->markType;
930 : 5479 : erm->strength = rc->strength;
931 : 5479 : erm->waitPolicy = rc->waitPolicy;
932 : 5479 : erm->ermActive = false;
933 : 5479 : ItemPointerSetInvalid(&(erm->curCtid));
934 : 5479 : erm->ermExtra = NULL;
935 : :
936 [ + - + - : 5479 : Assert(erm->rti > 0 && erm->rti <= estate->es_range_table_size &&
- + ]
937 : : estate->es_rowmarks[erm->rti - 1] == NULL);
938 : :
939 : 5479 : estate->es_rowmarks[erm->rti - 1] = erm;
940 : : }
941 : : }
942 : :
943 : : /*
944 : : * Initialize the executor's tuple table to empty.
945 : : */
5823 946 : 281580 : estate->es_tupleTable = NIL;
947 : :
948 : : /* signal that this EState is not used for EPQ */
2193 andres@anarazel.de 949 : 281580 : estate->es_epq_active = NULL;
950 : :
951 : : /*
952 : : * Initialize private state information for each SubPlan. We must do this
953 : : * before running ExecInitNode on the main query tree, since
954 : : * ExecInitSubPlan expects to be able to find these entries.
955 : : */
6766 tgl@sss.pgh.pa.us 956 [ - + ]: 281580 : Assert(estate->es_subplanstates == NIL);
957 : 281580 : i = 1; /* subplan indices count from 1 */
958 [ + + + + : 304143 : foreach(l, plannedstmt->subplans)
+ + ]
959 : : {
6505 bruce@momjian.us 960 : 22563 : Plan *subplan = (Plan *) lfirst(l);
961 : : PlanState *subplanstate;
962 : : int sp_eflags;
963 : :
964 : : /*
965 : : * A subplan will never need to do BACKWARD scan nor MARK/RESTORE. If
966 : : * it is a parameterless subplan (not initplan), we suggest that it be
967 : : * prepared to handle REWIND efficiently; otherwise there is no need.
968 : : */
4326 kgrittn@postgresql.o 969 : 22563 : sp_eflags = eflags
970 : : & ~(EXEC_FLAG_REWIND | EXEC_FLAG_BACKWARD | EXEC_FLAG_MARK);
6766 tgl@sss.pgh.pa.us 971 [ + + ]: 22563 : if (bms_is_member(i, plannedstmt->rewindPlanIDs))
972 : 21 : sp_eflags |= EXEC_FLAG_REWIND;
973 : :
974 : 22563 : subplanstate = ExecInitNode(subplan, estate, sp_eflags);
975 : :
976 : 22563 : estate->es_subplanstates = lappend(estate->es_subplanstates,
977 : : subplanstate);
978 : :
979 : 22563 : i++;
980 : : }
981 : :
982 : : /*
983 : : * Initialize the private state information for all the nodes in the query
984 : : * tree. This opens files, allocates storage and leaves us ready to start
985 : : * processing tuples.
986 : : */
7130 987 : 281580 : planstate = ExecInitNode(plan, estate, eflags);
988 : :
989 : : /*
990 : : * Get the tuple descriptor describing the type of tuples to return.
991 : : */
8160 992 : 281352 : tupType = ExecGetResultType(planstate);
993 : :
994 : : /*
995 : : * Initialize the junk filter if needed. SELECT queries need a filter if
996 : : * there are any junk attrs in the top-level tlist.
997 : : */
5810 998 [ + + ]: 281352 : if (operation == CMD_SELECT)
999 : : {
9867 bruce@momjian.us 1000 : 226117 : bool junk_filter_needed = false;
1001 : : ListCell *tlist;
1002 : :
5810 tgl@sss.pgh.pa.us 1003 [ + + + + : 854273 : foreach(tlist, plan->targetlist)
+ + ]
1004 : : {
1005 : 640753 : TargetEntry *tle = (TargetEntry *) lfirst(tlist);
1006 : :
1007 [ + + ]: 640753 : if (tle->resjunk)
1008 : : {
9443 1009 : 12597 : junk_filter_needed = true;
1010 : 12597 : break;
1011 : : }
1012 : : }
1013 : :
1014 [ + + ]: 226117 : if (junk_filter_needed)
1015 : : {
1016 : : JunkFilter *j;
1017 : : TupleTableSlot *slot;
1018 : :
2487 andres@anarazel.de 1019 : 12597 : slot = ExecInitExtraTupleSlot(estate, NULL, &TTSOpsVirtual);
5810 tgl@sss.pgh.pa.us 1020 : 12597 : j = ExecInitJunkFilter(planstate->plan->targetlist,
1021 : : slot);
1022 : 12597 : estate->es_junkFilter = j;
1023 : :
1024 : : /* Want to return the cleaned tuple type */
1025 : 12597 : tupType = j->jf_cleanTupType;
1026 : : }
1027 : : }
1028 : :
8311 1029 : 281352 : queryDesc->tupDesc = tupType;
1030 : 281352 : queryDesc->planstate = planstate;
10651 scrappy@hub.org 1031 : 281352 : }
1032 : :
1033 : : /*
1034 : : * Check that a proposed result relation is a legal target for the operation
1035 : : *
1036 : : * Generally the parser and/or planner should have noticed any such mistake
1037 : : * already, but let's make sure.
1038 : : *
1039 : : * For INSERT ON CONFLICT, the result relation is required to support the
1040 : : * onConflictAction, regardless of whether a conflict actually occurs.
1041 : : *
1042 : : * For MERGE, mergeActions is the list of actions that may be performed. The
1043 : : * result relation is required to support every action, regardless of whether
1044 : : * or not they are all executed.
1045 : : *
1046 : : * Note: when changing this function, you probably also need to look at
1047 : : * CheckValidRowMarkRel.
1048 : : */
1049 : : void
555 dean.a.rasheed@gmail 1050 : 61124 : CheckValidResultRel(ResultRelInfo *resultRelInfo, CmdType operation,
1051 : : OnConflictAction onConflictAction, List *mergeActions)
1052 : : {
2921 rhaas@postgresql.org 1053 : 61124 : Relation resultRel = resultRelInfo->ri_RelationDesc;
1054 : : FdwRoutine *fdwroutine;
1055 : :
1056 : : /* Expect a fully-formed ResultRelInfo from InitResultRelInfo(). */
347 noah@leadboat.com 1057 [ - + ]: 61124 : Assert(resultRelInfo->ri_needLockTagTuple ==
1058 : : IsInplaceUpdateRelation(resultRel));
1059 : :
5307 tgl@sss.pgh.pa.us 1060 [ + - - + : 61124 : switch (resultRel->rd_rel->relkind)
+ + - ]
1061 : : {
6597 1062 : 60507 : case RELKIND_RELATION:
1063 : : case RELKIND_PARTITIONED_TABLE:
1064 : :
1065 : : /*
1066 : : * For MERGE, check that the target relation supports each action.
1067 : : * For other operations, just check the operation itself.
1068 : : */
2 dean.a.rasheed@gmail 1069 [ + + ]: 60507 : if (operation == CMD_MERGE)
1070 [ + - + + : 3252 : foreach_node(MergeAction, action, mergeActions)
+ + ]
1071 : 1530 : CheckCmdReplicaIdentity(resultRel, action->commandType);
1072 : : else
1073 : 59640 : CheckCmdReplicaIdentity(resultRel, operation);
1074 : :
1075 : : /*
1076 : : * For INSERT ON CONFLICT DO UPDATE, additionally check that the
1077 : : * target relation supports UPDATE.
1078 : : */
1079 [ + + ]: 60347 : if (onConflictAction == ONCONFLICT_UPDATE)
1080 : 547 : CheckCmdReplicaIdentity(resultRel, CMD_UPDATE);
6597 tgl@sss.pgh.pa.us 1081 : 60341 : break;
9064 tgl@sss.pgh.pa.us 1082 :UBC 0 : case RELKIND_SEQUENCE:
8083 1083 [ # # ]: 0 : ereport(ERROR,
1084 : : (errcode(ERRCODE_WRONG_OBJECT_TYPE),
1085 : : errmsg("cannot change sequence \"%s\"",
1086 : : RelationGetRelationName(resultRel))));
1087 : : break;
9064 1088 : 0 : case RELKIND_TOASTVALUE:
8083 1089 [ # # ]: 0 : ereport(ERROR,
1090 : : (errcode(ERRCODE_WRONG_OBJECT_TYPE),
1091 : : errmsg("cannot change TOAST relation \"%s\"",
1092 : : RelationGetRelationName(resultRel))));
1093 : : break;
9064 tgl@sss.pgh.pa.us 1094 :CBC 210 : case RELKIND_VIEW:
1095 : :
1096 : : /*
1097 : : * Okay only if there's a suitable INSTEAD OF trigger. Otherwise,
1098 : : * complain, but omit errdetail because we haven't got the
1099 : : * information handy (and given that it really shouldn't happen,
1100 : : * it's not worth great exertion to get).
1101 : : */
555 dean.a.rasheed@gmail 1102 [ - + ]: 210 : if (!view_has_instead_trigger(resultRel, operation, mergeActions))
555 dean.a.rasheed@gmail 1103 :UBC 0 : error_view_not_updatable(resultRel, operation, mergeActions,
1104 : : NULL);
9064 tgl@sss.pgh.pa.us 1105 :CBC 210 : break;
4570 kgrittn@postgresql.o 1106 : 60 : case RELKIND_MATVIEW:
4435 1107 [ - + ]: 60 : if (!MatViewIncrementalMaintenanceIsEnabled())
4435 kgrittn@postgresql.o 1108 [ # # ]:UBC 0 : ereport(ERROR,
1109 : : (errcode(ERRCODE_WRONG_OBJECT_TYPE),
1110 : : errmsg("cannot change materialized view \"%s\"",
1111 : : RelationGetRelationName(resultRel))));
4570 kgrittn@postgresql.o 1112 :CBC 60 : break;
5362 rhaas@postgresql.org 1113 : 347 : case RELKIND_FOREIGN_TABLE:
1114 : : /* Okay only if the FDW supports it */
2921 1115 : 347 : fdwroutine = resultRelInfo->ri_FdwRoutine;
4563 tgl@sss.pgh.pa.us 1116 [ + + + - ]: 347 : switch (operation)
1117 : : {
1118 : 157 : case CMD_INSERT:
1119 [ + + ]: 157 : if (fdwroutine->ExecForeignInsert == NULL)
1120 [ + - ]: 5 : ereport(ERROR,
1121 : : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
1122 : : errmsg("cannot insert into foreign table \"%s\"",
1123 : : RelationGetRelationName(resultRel))));
4469 1124 [ + - ]: 152 : if (fdwroutine->IsForeignRelUpdatable != NULL &&
1125 [ - + ]: 152 : (fdwroutine->IsForeignRelUpdatable(resultRel) & (1 << CMD_INSERT)) == 0)
4469 tgl@sss.pgh.pa.us 1126 [ # # ]:UBC 0 : ereport(ERROR,
1127 : : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1128 : : errmsg("foreign table \"%s\" does not allow inserts",
1129 : : RelationGetRelationName(resultRel))));
4563 tgl@sss.pgh.pa.us 1130 :CBC 152 : break;
1131 : 107 : case CMD_UPDATE:
1132 [ + + ]: 107 : if (fdwroutine->ExecForeignUpdate == NULL)
1133 [ + - ]: 2 : ereport(ERROR,
1134 : : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
1135 : : errmsg("cannot update foreign table \"%s\"",
1136 : : RelationGetRelationName(resultRel))));
4469 1137 [ + - ]: 105 : if (fdwroutine->IsForeignRelUpdatable != NULL &&
1138 [ - + ]: 105 : (fdwroutine->IsForeignRelUpdatable(resultRel) & (1 << CMD_UPDATE)) == 0)
4469 tgl@sss.pgh.pa.us 1139 [ # # ]:UBC 0 : ereport(ERROR,
1140 : : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1141 : : errmsg("foreign table \"%s\" does not allow updates",
1142 : : RelationGetRelationName(resultRel))));
4563 tgl@sss.pgh.pa.us 1143 :CBC 105 : break;
1144 : 83 : case CMD_DELETE:
1145 [ + + ]: 83 : if (fdwroutine->ExecForeignDelete == NULL)
1146 [ + - ]: 2 : ereport(ERROR,
1147 : : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
1148 : : errmsg("cannot delete from foreign table \"%s\"",
1149 : : RelationGetRelationName(resultRel))));
4469 1150 [ + - ]: 81 : if (fdwroutine->IsForeignRelUpdatable != NULL &&
1151 [ - + ]: 81 : (fdwroutine->IsForeignRelUpdatable(resultRel) & (1 << CMD_DELETE)) == 0)
4469 tgl@sss.pgh.pa.us 1152 [ # # ]:UBC 0 : ereport(ERROR,
1153 : : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
1154 : : errmsg("foreign table \"%s\" does not allow deletes",
1155 : : RelationGetRelationName(resultRel))));
4563 tgl@sss.pgh.pa.us 1156 :CBC 81 : break;
4563 tgl@sss.pgh.pa.us 1157 :UBC 0 : default:
1158 [ # # ]: 0 : elog(ERROR, "unrecognized CmdType: %d", (int) operation);
1159 : : break;
1160 : : }
5362 rhaas@postgresql.org 1161 :CBC 338 : break;
6597 tgl@sss.pgh.pa.us 1162 :UBC 0 : default:
1163 [ # # ]: 0 : ereport(ERROR,
1164 : : (errcode(ERRCODE_WRONG_OBJECT_TYPE),
1165 : : errmsg("cannot change relation \"%s\"",
1166 : : RelationGetRelationName(resultRel))));
1167 : : break;
1168 : : }
5307 tgl@sss.pgh.pa.us 1169 :CBC 60949 : }
1170 : :
1171 : : /*
1172 : : * Check that a proposed rowmark target relation is a legal target
1173 : : *
1174 : : * In most cases parser and/or planner should have noticed this already, but
1175 : : * they don't cover all cases.
1176 : : */
1177 : : static void
5210 1178 : 5320 : CheckValidRowMarkRel(Relation rel, RowMarkType markType)
1179 : : {
1180 : : FdwRoutine *fdwroutine;
1181 : :
1182 [ + - - - : 5320 : switch (rel->rd_rel->relkind)
+ - - ]
1183 : : {
1184 : 5314 : case RELKIND_RELATION:
1185 : : case RELKIND_PARTITIONED_TABLE:
1186 : : /* OK */
1187 : 5314 : break;
5210 tgl@sss.pgh.pa.us 1188 :UBC 0 : case RELKIND_SEQUENCE:
1189 : : /* Must disallow this because we don't vacuum sequences */
1190 [ # # ]: 0 : ereport(ERROR,
1191 : : (errcode(ERRCODE_WRONG_OBJECT_TYPE),
1192 : : errmsg("cannot lock rows in sequence \"%s\"",
1193 : : RelationGetRelationName(rel))));
1194 : : break;
1195 : 0 : case RELKIND_TOASTVALUE:
1196 : : /* We could allow this, but there seems no good reason to */
1197 [ # # ]: 0 : ereport(ERROR,
1198 : : (errcode(ERRCODE_WRONG_OBJECT_TYPE),
1199 : : errmsg("cannot lock rows in TOAST relation \"%s\"",
1200 : : RelationGetRelationName(rel))));
1201 : : break;
1202 : 0 : case RELKIND_VIEW:
1203 : : /* Should not get here; planner should have expanded the view */
1204 [ # # ]: 0 : ereport(ERROR,
1205 : : (errcode(ERRCODE_WRONG_OBJECT_TYPE),
1206 : : errmsg("cannot lock rows in view \"%s\"",
1207 : : RelationGetRelationName(rel))));
1208 : : break;
4570 kgrittn@postgresql.o 1209 :CBC 6 : case RELKIND_MATVIEW:
1210 : : /* Allow referencing a matview, but not actual locking clauses */
4202 tgl@sss.pgh.pa.us 1211 [ + + ]: 6 : if (markType != ROW_MARK_REFERENCE)
1212 [ + - ]: 3 : ereport(ERROR,
1213 : : (errcode(ERRCODE_WRONG_OBJECT_TYPE),
1214 : : errmsg("cannot lock rows in materialized view \"%s\"",
1215 : : RelationGetRelationName(rel))));
4570 kgrittn@postgresql.o 1216 : 3 : break;
5210 tgl@sss.pgh.pa.us 1217 :UBC 0 : case RELKIND_FOREIGN_TABLE:
1218 : : /* Okay only if the FDW supports it */
3770 1219 : 0 : fdwroutine = GetFdwRoutineForRelation(rel, false);
1220 [ # # ]: 0 : if (fdwroutine->RefetchForeignRow == NULL)
1221 [ # # ]: 0 : ereport(ERROR,
1222 : : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
1223 : : errmsg("cannot lock rows in foreign table \"%s\"",
1224 : : RelationGetRelationName(rel))));
5210 1225 : 0 : break;
1226 : 0 : default:
1227 [ # # ]: 0 : ereport(ERROR,
1228 : : (errcode(ERRCODE_WRONG_OBJECT_TYPE),
1229 : : errmsg("cannot lock rows in relation \"%s\"",
1230 : : RelationGetRelationName(rel))));
1231 : : break;
1232 : : }
5210 tgl@sss.pgh.pa.us 1233 :CBC 5317 : }
1234 : :
1235 : : /*
1236 : : * Initialize ResultRelInfo data for one result relation
1237 : : *
1238 : : * Caution: before Postgres 9.1, this function included the relkind checking
1239 : : * that's now in CheckValidResultRel, and it also did ExecOpenIndices if
1240 : : * appropriate. Be sure callers cover those needs.
1241 : : */
1242 : : void
5307 1243 : 213248 : InitResultRelInfo(ResultRelInfo *resultRelInfo,
1244 : : Relation resultRelationDesc,
1245 : : Index resultRelationIndex,
1246 : : ResultRelInfo *partition_root_rri,
1247 : : int instrument_options)
1248 : : {
9064 1249 [ + - + - : 10875648 : MemSet(resultRelInfo, 0, sizeof(ResultRelInfo));
+ - + - +
+ ]
1250 : 213248 : resultRelInfo->type = T_ResultRelInfo;
1251 : 213248 : resultRelInfo->ri_RangeTableIndex = resultRelationIndex;
1252 : 213248 : resultRelInfo->ri_RelationDesc = resultRelationDesc;
1253 : 213248 : resultRelInfo->ri_NumIndices = 0;
1254 : 213248 : resultRelInfo->ri_IndexRelationDescs = NULL;
1255 : 213248 : resultRelInfo->ri_IndexRelationInfo = NULL;
347 noah@leadboat.com 1256 : 213248 : resultRelInfo->ri_needLockTagTuple =
1257 : 213248 : IsInplaceUpdateRelation(resultRelationDesc);
1258 : : /* make a copy so as not to depend on relcache info not changing... */
5307 tgl@sss.pgh.pa.us 1259 : 213248 : resultRelInfo->ri_TrigDesc = CopyTriggerDesc(resultRelationDesc->trigdesc);
7470 1260 [ + + ]: 213248 : if (resultRelInfo->ri_TrigDesc)
1261 : : {
7266 bruce@momjian.us 1262 : 8603 : int n = resultRelInfo->ri_TrigDesc->numtriggers;
1263 : :
7470 tgl@sss.pgh.pa.us 1264 : 8603 : resultRelInfo->ri_TrigFunctions = (FmgrInfo *)
1265 : 8603 : palloc0(n * sizeof(FmgrInfo));
3098 andres@anarazel.de 1266 : 8603 : resultRelInfo->ri_TrigWhenExprs = (ExprState **)
1267 : 8603 : palloc0(n * sizeof(ExprState *));
5744 rhaas@postgresql.org 1268 [ - + ]: 8603 : if (instrument_options)
1578 efujita@postgresql.o 1269 :UBC 0 : resultRelInfo->ri_TrigInstrument = InstrAlloc(n, instrument_options, false);
1270 : : }
1271 : : else
1272 : : {
7470 tgl@sss.pgh.pa.us 1273 :CBC 204645 : resultRelInfo->ri_TrigFunctions = NULL;
5769 1274 : 204645 : resultRelInfo->ri_TrigWhenExprs = NULL;
7470 1275 : 204645 : resultRelInfo->ri_TrigInstrument = NULL;
1276 : : }
4563 1277 [ + + ]: 213248 : if (resultRelationDesc->rd_rel->relkind == RELKIND_FOREIGN_TABLE)
1278 : 358 : resultRelInfo->ri_FdwRoutine = GetFdwRoutineForRelation(resultRelationDesc, true);
1279 : : else
1280 : 212890 : resultRelInfo->ri_FdwRoutine = NULL;
1281 : :
1282 : : /* The following fields are set later if needed */
1620 1283 : 213248 : resultRelInfo->ri_RowIdAttNo = 0;
975 1284 : 213248 : resultRelInfo->ri_extraUpdatedCols = NULL;
1620 1285 : 213248 : resultRelInfo->ri_projectNew = NULL;
1286 : 213248 : resultRelInfo->ri_newTupleSlot = NULL;
1287 : 213248 : resultRelInfo->ri_oldTupleSlot = NULL;
1614 1288 : 213248 : resultRelInfo->ri_projectNewInfoValid = false;
4563 1289 : 213248 : resultRelInfo->ri_FdwState = NULL;
3459 rhaas@postgresql.org 1290 : 213248 : resultRelInfo->ri_usesFdwDirectModify = false;
162 peter@eisentraut.org 1291 : 213248 : resultRelInfo->ri_CheckConstraintExprs = NULL;
1292 : 213248 : resultRelInfo->ri_GenVirtualNotNullConstraintExprs = NULL;
915 tgl@sss.pgh.pa.us 1293 : 213248 : resultRelInfo->ri_GeneratedExprsI = NULL;
1294 : 213248 : resultRelInfo->ri_GeneratedExprsU = NULL;
6965 1295 : 213248 : resultRelInfo->ri_projectReturning = NULL;
2721 alvherre@alvh.no-ip. 1296 : 213248 : resultRelInfo->ri_onConflictArbiterIndexes = NIL;
1297 : 213248 : resultRelInfo->ri_onConflict = NULL;
2384 andres@anarazel.de 1298 : 213248 : resultRelInfo->ri_ReturningSlot = NULL;
1299 : 213248 : resultRelInfo->ri_TrigOldSlot = NULL;
1300 : 213248 : resultRelInfo->ri_TrigNewSlot = NULL;
233 dean.a.rasheed@gmail 1301 : 213248 : resultRelInfo->ri_AllNullSlot = NULL;
525 1302 : 213248 : resultRelInfo->ri_MergeActions[MERGE_WHEN_MATCHED] = NIL;
1303 : 213248 : resultRelInfo->ri_MergeActions[MERGE_WHEN_NOT_MATCHED_BY_SOURCE] = NIL;
1304 : 213248 : resultRelInfo->ri_MergeActions[MERGE_WHEN_NOT_MATCHED_BY_TARGET] = NIL;
1305 : 213248 : resultRelInfo->ri_MergeJoinCondition = NULL;
1306 : :
1307 : : /*
1308 : : * Only ExecInitPartitionInfo() and ExecInitPartitionDispatchInfo() pass
1309 : : * non-NULL partition_root_rri. For child relations that are part of the
1310 : : * initial query rather than being dynamically added by tuple routing,
1311 : : * this field is filled in ExecInitModifyTable().
1312 : : */
1671 heikki.linnakangas@i 1313 : 213248 : resultRelInfo->ri_RootResultRelInfo = partition_root_rri;
1314 : : /* Set by ExecGetRootToChildMap */
1009 alvherre@alvh.no-ip. 1315 : 213248 : resultRelInfo->ri_RootToChildMap = NULL;
1316 : 213248 : resultRelInfo->ri_RootToChildMapValid = false;
1317 : : /* Set by ExecInitRoutingInfo */
1318 : 213248 : resultRelInfo->ri_PartitionTupleSlot = NULL;
1783 heikki.linnakangas@i 1319 : 213248 : resultRelInfo->ri_ChildToRootMap = NULL;
1614 tgl@sss.pgh.pa.us 1320 : 213248 : resultRelInfo->ri_ChildToRootMapValid = false;
2347 andres@anarazel.de 1321 : 213248 : resultRelInfo->ri_CopyMultiInsertBuffer = NULL;
9064 tgl@sss.pgh.pa.us 1322 : 213248 : }
1323 : :
1324 : : /*
1325 : : * ExecGetTriggerResultRel
1326 : : * Get a ResultRelInfo for a trigger target relation.
1327 : : *
1328 : : * Most of the time, triggers are fired on one of the result relations of the
1329 : : * query, and so we can just return a member of the es_result_relations array,
1330 : : * or the es_tuple_routing_result_relations list (if any). (Note: in self-join
1331 : : * situations there might be multiple members with the same OID; if so it
1332 : : * doesn't matter which one we pick.)
1333 : : *
1334 : : * However, it is sometimes necessary to fire triggers on other relations;
1335 : : * this happens mainly when an RI update trigger queues additional triggers
1336 : : * on other relations, which will be processed in the context of the outer
1337 : : * query. For efficiency's sake, we want to have a ResultRelInfo for those
1338 : : * triggers too; that can avoid repeated re-opening of the relation. (It
1339 : : * also provides a way for EXPLAIN ANALYZE to report the runtimes of such
1340 : : * triggers.) So we make additional ResultRelInfo's as needed, and save them
1341 : : * in es_trig_target_relations.
1342 : : */
1343 : : ResultRelInfo *
1266 alvherre@alvh.no-ip. 1344 : 4077 : ExecGetTriggerResultRel(EState *estate, Oid relid,
1345 : : ResultRelInfo *rootRelInfo)
1346 : : {
1347 : : ResultRelInfo *rInfo;
1348 : : ListCell *l;
1349 : : Relation rel;
1350 : : MemoryContext oldcontext;
1351 : :
1352 : : /* Search through the query result relations */
1789 heikki.linnakangas@i 1353 [ + + + + : 5197 : foreach(l, estate->es_opened_result_relations)
+ + ]
1354 : : {
1355 : 4470 : rInfo = lfirst(l);
6597 tgl@sss.pgh.pa.us 1356 [ + + ]: 4470 : if (RelationGetRelid(rInfo->ri_RelationDesc) == relid)
1357 : 3350 : return rInfo;
1358 : : }
1359 : :
1360 : : /*
1361 : : * Search through the result relations that were created during tuple
1362 : : * routing, if any.
1363 : : */
2767 rhaas@postgresql.org 1364 [ + + + + : 834 : foreach(l, estate->es_tuple_routing_result_relations)
+ + ]
1365 : : {
2941 1366 : 455 : rInfo = (ResultRelInfo *) lfirst(l);
1367 [ + + ]: 455 : if (RelationGetRelid(rInfo->ri_RelationDesc) == relid)
1368 : 348 : return rInfo;
1369 : : }
1370 : :
1371 : : /* Nope, but maybe we already made an extra ResultRelInfo for it */
6597 tgl@sss.pgh.pa.us 1372 [ + + + + : 550 : foreach(l, estate->es_trig_target_relations)
+ + ]
1373 : : {
1374 : 186 : rInfo = (ResultRelInfo *) lfirst(l);
1375 [ + + ]: 186 : if (RelationGetRelid(rInfo->ri_RelationDesc) == relid)
1376 : 15 : return rInfo;
1377 : : }
1378 : : /* Nope, so we need a new one */
1379 : :
1380 : : /*
1381 : : * Open the target relation's relcache entry. We assume that an
1382 : : * appropriate lock is still held by the backend from whenever the trigger
1383 : : * event got queued, so we need take no new lock here. Also, we need not
1384 : : * recheck the relkind, so no need for CheckValidResultRel.
1385 : : */
2420 andres@anarazel.de 1386 : 364 : rel = table_open(relid, NoLock);
1387 : :
1388 : : /*
1389 : : * Make the new entry in the right context.
1390 : : */
6597 tgl@sss.pgh.pa.us 1391 : 364 : oldcontext = MemoryContextSwitchTo(estate->es_query_cxt);
1392 : 364 : rInfo = makeNode(ResultRelInfo);
6371 1393 : 364 : InitResultRelInfo(rInfo,
1394 : : rel,
1395 : : 0, /* dummy rangetable index */
1396 : : rootRelInfo,
1397 : : estate->es_instrument);
6597 1398 : 364 : estate->es_trig_target_relations =
1399 : 364 : lappend(estate->es_trig_target_relations, rInfo);
1400 : 364 : MemoryContextSwitchTo(oldcontext);
1401 : :
1402 : : /*
1403 : : * Currently, we don't need any index information in ResultRelInfos used
1404 : : * only for triggers, so no need to call ExecOpenIndices.
1405 : : */
1406 : :
1407 : 364 : return rInfo;
1408 : : }
1409 : :
1410 : : /*
1411 : : * Return the ancestor relations of a given leaf partition result relation
1412 : : * up to and including the query's root target relation.
1413 : : *
1414 : : * These work much like the ones opened by ExecGetTriggerResultRel, except
1415 : : * that we need to keep them in a separate list.
1416 : : *
1417 : : * These are closed by ExecCloseResultRelations.
1418 : : */
1419 : : List *
1266 alvherre@alvh.no-ip. 1420 : 150 : ExecGetAncestorResultRels(EState *estate, ResultRelInfo *resultRelInfo)
1421 : : {
1422 : 150 : ResultRelInfo *rootRelInfo = resultRelInfo->ri_RootResultRelInfo;
1423 : 150 : Relation partRel = resultRelInfo->ri_RelationDesc;
1424 : : Oid rootRelOid;
1425 : :
1426 [ - + ]: 150 : if (!partRel->rd_rel->relispartition)
1266 alvherre@alvh.no-ip. 1427 [ # # ]:UBC 0 : elog(ERROR, "cannot find ancestors of a non-partition result relation");
1266 alvherre@alvh.no-ip. 1428 [ - + ]:CBC 150 : Assert(rootRelInfo != NULL);
1429 : 150 : rootRelOid = RelationGetRelid(rootRelInfo->ri_RelationDesc);
1430 [ + + ]: 150 : if (resultRelInfo->ri_ancestorResultRels == NIL)
1431 : : {
1432 : : ListCell *lc;
1433 : 117 : List *oids = get_partition_ancestors(RelationGetRelid(partRel));
1434 : 117 : List *ancResultRels = NIL;
1435 : :
1436 [ + - + - : 150 : foreach(lc, oids)
+ - ]
1437 : : {
1438 : 150 : Oid ancOid = lfirst_oid(lc);
1439 : : Relation ancRel;
1440 : : ResultRelInfo *rInfo;
1441 : :
1442 : : /*
1443 : : * Ignore the root ancestor here, and use ri_RootResultRelInfo
1444 : : * (below) for it instead. Also, we stop climbing up the
1445 : : * hierarchy when we find the table that was mentioned in the
1446 : : * query.
1447 : : */
1448 [ + + ]: 150 : if (ancOid == rootRelOid)
1449 : 117 : break;
1450 : :
1451 : : /*
1452 : : * All ancestors up to the root target relation must have been
1453 : : * locked by the planner or AcquireExecutorLocks().
1454 : : */
1455 : 33 : ancRel = table_open(ancOid, NoLock);
1456 : 33 : rInfo = makeNode(ResultRelInfo);
1457 : :
1458 : : /* dummy rangetable index */
1459 : 33 : InitResultRelInfo(rInfo, ancRel, 0, NULL,
1460 : : estate->es_instrument);
1461 : 33 : ancResultRels = lappend(ancResultRels, rInfo);
1462 : : }
1463 : 117 : ancResultRels = lappend(ancResultRels, rootRelInfo);
1464 : 117 : resultRelInfo->ri_ancestorResultRels = ancResultRels;
1465 : : }
1466 : :
1467 : : /* We must have found some ancestor */
1468 [ - + ]: 150 : Assert(resultRelInfo->ri_ancestorResultRels != NIL);
1469 : :
1470 : 150 : return resultRelInfo->ri_ancestorResultRels;
1471 : : }
1472 : :
1473 : : /* ----------------------------------------------------------------
1474 : : * ExecPostprocessPlan
1475 : : *
1476 : : * Give plan nodes a final chance to execute before shutdown
1477 : : * ----------------------------------------------------------------
1478 : : */
1479 : : static void
5307 tgl@sss.pgh.pa.us 1480 : 258147 : ExecPostprocessPlan(EState *estate)
1481 : : {
1482 : : ListCell *lc;
1483 : :
1484 : : /*
1485 : : * Make sure nodes run forward.
1486 : : */
1487 : 258147 : estate->es_direction = ForwardScanDirection;
1488 : :
1489 : : /*
1490 : : * Run any secondary ModifyTable nodes to completion, in case the main
1491 : : * query did not fetch all rows from them. (We do this to ensure that
1492 : : * such nodes have predictable results.)
1493 : : */
1494 [ + + + + : 258571 : foreach(lc, estate->es_auxmodifytables)
+ + ]
1495 : : {
5263 bruce@momjian.us 1496 : 424 : PlanState *ps = (PlanState *) lfirst(lc);
1497 : :
1498 : : for (;;)
5307 tgl@sss.pgh.pa.us 1499 : 69 : {
1500 : : TupleTableSlot *slot;
1501 : :
1502 : : /* Reset the per-output-tuple exprcontext each time */
1503 [ + + ]: 493 : ResetPerTupleExprContext(estate);
1504 : :
1505 : 493 : slot = ExecProcNode(ps);
1506 : :
1507 [ + + + - ]: 493 : if (TupIsNull(slot))
1508 : : break;
1509 : : }
1510 : : }
1511 : 258147 : }
1512 : :
1513 : : /* ----------------------------------------------------------------
1514 : : * ExecEndPlan
1515 : : *
1516 : : * Cleans up the query plan -- closes files and frees up storage
1517 : : *
1518 : : * NOTE: we are no longer very worried about freeing storage per se
1519 : : * in this code; FreeExecutorState should be guaranteed to release all
1520 : : * memory that needs to be released. What we are worried about doing
1521 : : * is closing relations and dropping buffer pins. Thus, for example,
1522 : : * tuple tables must be cleared or dropped to ensure pins are released.
1523 : : * ----------------------------------------------------------------
1524 : : */
1525 : : static void
8065 bruce@momjian.us 1526 : 267858 : ExecEndPlan(PlanState *planstate, EState *estate)
1527 : : {
1528 : : ListCell *l;
1529 : :
1530 : : /*
1531 : : * shut down the node-type-specific query processing
1532 : : */
8311 tgl@sss.pgh.pa.us 1533 : 267858 : ExecEndNode(planstate);
1534 : :
1535 : : /*
1536 : : * for subplans too
1537 : : */
6766 1538 [ + + + + : 290128 : foreach(l, estate->es_subplanstates)
+ + ]
1539 : : {
6505 bruce@momjian.us 1540 : 22270 : PlanState *subplanstate = (PlanState *) lfirst(l);
1541 : :
6766 tgl@sss.pgh.pa.us 1542 : 22270 : ExecEndNode(subplanstate);
1543 : : }
1544 : :
1545 : : /*
1546 : : * destroy the executor's tuple table. Actually we only care about
1547 : : * releasing buffer pins and tupdesc refcounts; there's no need to pfree
1548 : : * the TupleTableSlots, since the containing memory context is about to go
1549 : : * away anyway.
1550 : : */
5823 1551 : 267858 : ExecResetTupleTable(estate->es_tupleTable, false);
1552 : :
1553 : : /*
1554 : : * Close any Relations that have been opened for range table entries or
1555 : : * result relations.
1556 : : */
1789 heikki.linnakangas@i 1557 : 267858 : ExecCloseResultRelations(estate);
1558 : 267858 : ExecCloseRangeTableRelations(estate);
1559 : 267858 : }
1560 : :
1561 : : /*
1562 : : * Close any relations that have been opened for ResultRelInfos.
1563 : : */
1564 : : void
1565 : 268858 : ExecCloseResultRelations(EState *estate)
1566 : : {
1567 : : ListCell *l;
1568 : :
1569 : : /*
1570 : : * close indexes of result relation(s) if any. (Rels themselves are
1571 : : * closed in ExecCloseRangeTableRelations())
1572 : : *
1573 : : * In addition, close the stub RTs that may be in each resultrel's
1574 : : * ri_ancestorResultRels.
1575 : : */
1576 [ + + + + : 325080 : foreach(l, estate->es_opened_result_relations)
+ + ]
1577 : : {
1578 : 56222 : ResultRelInfo *resultRelInfo = lfirst(l);
1579 : : ListCell *lc;
1580 : :
9064 tgl@sss.pgh.pa.us 1581 : 56222 : ExecCloseIndices(resultRelInfo);
1266 alvherre@alvh.no-ip. 1582 [ + + + + : 56348 : foreach(lc, resultRelInfo->ri_ancestorResultRels)
+ + ]
1583 : : {
1584 : 126 : ResultRelInfo *rInfo = lfirst(lc);
1585 : :
1586 : : /*
1587 : : * Ancestors with RTI > 0 (should only be the root ancestor) are
1588 : : * closed by ExecCloseRangeTableRelations.
1589 : : */
1590 [ + + ]: 126 : if (rInfo->ri_RangeTableIndex > 0)
1591 : 102 : continue;
1592 : :
1593 : 24 : table_close(rInfo->ri_RelationDesc, NoLock);
1594 : : }
1595 : : }
1596 : :
1597 : : /* Close any relations that have been opened by ExecGetTriggerResultRel(). */
1789 heikki.linnakangas@i 1598 [ + + + + : 269113 : foreach(l, estate->es_trig_target_relations)
+ + ]
1599 : : {
1600 : 255 : ResultRelInfo *resultRelInfo = (ResultRelInfo *) lfirst(l);
1601 : :
1602 : : /*
1603 : : * Assert this is a "dummy" ResultRelInfo, see above. Otherwise we
1604 : : * might be issuing a duplicate close against a Relation opened by
1605 : : * ExecGetRangeTableRelation.
1606 : : */
1607 [ - + ]: 255 : Assert(resultRelInfo->ri_RangeTableIndex == 0);
1608 : :
1609 : : /*
1610 : : * Since ExecGetTriggerResultRel doesn't call ExecOpenIndices for
1611 : : * these rels, we needn't call ExecCloseIndices either.
1612 : : */
1613 [ - + ]: 255 : Assert(resultRelInfo->ri_NumIndices == 0);
1614 : :
1615 : 255 : table_close(resultRelInfo->ri_RelationDesc, NoLock);
1616 : : }
1617 : 268858 : }
1618 : :
1619 : : /*
1620 : : * Close all relations opened by ExecGetRangeTableRelation().
1621 : : *
1622 : : * We do not release any locks we might hold on those rels.
1623 : : */
1624 : : void
1625 : 268653 : ExecCloseRangeTableRelations(EState *estate)
1626 : : {
1627 : : int i;
1628 : :
1629 [ + + ]: 792962 : for (i = 0; i < estate->es_range_table_size; i++)
1630 : : {
2529 tgl@sss.pgh.pa.us 1631 [ + + ]: 524309 : if (estate->es_relations[i])
2420 andres@anarazel.de 1632 : 255161 : table_close(estate->es_relations[i], NoLock);
1633 : : }
10651 scrappy@hub.org 1634 : 268653 : }
1635 : :
1636 : : /* ----------------------------------------------------------------
1637 : : * ExecutePlan
1638 : : *
1639 : : * Processes the query plan until we have retrieved 'numberTuples' tuples,
1640 : : * moving in the specified direction.
1641 : : *
1642 : : * Runs to completion if numberTuples is 0
1643 : : * ----------------------------------------------------------------
1644 : : */
1645 : : static void
271 tgl@sss.pgh.pa.us 1646 : 276584 : ExecutePlan(QueryDesc *queryDesc,
1647 : : CmdType operation,
1648 : : bool sendTuples,
1649 : : uint64 numberTuples,
1650 : : ScanDirection direction,
1651 : : DestReceiver *dest)
1652 : : {
1653 : 276584 : EState *estate = queryDesc->estate;
1654 : 276584 : PlanState *planstate = queryDesc->planstate;
1655 : : bool use_parallel_mode;
1656 : : TupleTableSlot *slot;
1657 : : uint64 current_tuple_count;
1658 : :
1659 : : /*
1660 : : * initialize local variables
1661 : : */
10226 bruce@momjian.us 1662 : 276584 : current_tuple_count = 0;
1663 : :
1664 : : /*
1665 : : * Set the direction.
1666 : : */
1667 : 276584 : estate->es_direction = direction;
1668 : :
1669 : : /*
1670 : : * Set up parallel mode if appropriate.
1671 : : *
1672 : : * Parallel mode only supports complete execution of a plan. If we've
1673 : : * already partially executed it, or if the caller asks us to exit early,
1674 : : * we must force the plan to run without parallelism.
1675 : : */
271 tgl@sss.pgh.pa.us 1676 [ + + + + ]: 276584 : if (queryDesc->already_executed || numberTuples != 0)
3613 rhaas@postgresql.org 1677 : 62379 : use_parallel_mode = false;
1678 : : else
271 tgl@sss.pgh.pa.us 1679 : 214205 : use_parallel_mode = queryDesc->plannedstmt->parallelModeNeeded;
1680 : 276584 : queryDesc->already_executed = true;
1681 : :
2871 rhaas@postgresql.org 1682 : 276584 : estate->es_use_parallel_mode = use_parallel_mode;
3613 1683 [ + + ]: 276584 : if (use_parallel_mode)
1684 : 348 : EnterParallelMode();
1685 : :
1686 : : /*
1687 : : * Loop until we've processed the proper number of tuples from the plan.
1688 : : */
1689 : : for (;;)
1690 : : {
1691 : : /* Reset the per-output-tuple exprcontext */
8993 tgl@sss.pgh.pa.us 1692 [ + + ]: 6893598 : ResetPerTupleExprContext(estate);
1693 : :
1694 : : /*
1695 : : * Execute the plan and obtain a tuple
1696 : : */
5808 1697 : 6893598 : slot = ExecProcNode(planstate);
1698 : :
1699 : : /*
1700 : : * if the tuple is null, then we assume there is nothing more to
1701 : : * process so we just end the loop...
1702 : : */
1703 [ + + + + ]: 6881696 : if (TupIsNull(slot))
1704 : : break;
1705 : :
1706 : : /*
1707 : : * If we have a junk filter, then project a new tuple with the junk
1708 : : * removed.
1709 : : *
1710 : : * Store this new "clean" tuple in the junkfilter's resultSlot.
1711 : : * (Formerly, we stored it back over the "dirty" tuple, which is WRONG
1712 : : * because that tuple slot has the wrong descriptor.)
1713 : : */
1714 [ + + ]: 6664378 : if (estate->es_junkFilter != NULL)
1715 : 134685 : slot = ExecFilterJunk(estate->es_junkFilter, slot);
1716 : :
1717 : : /*
1718 : : * If we are supposed to send the tuple somewhere, do so. (In
1719 : : * practice, this is probably always the case at this point.)
1720 : : */
5810 1721 [ + - ]: 6664378 : if (sendTuples)
1722 : : {
1723 : : /*
1724 : : * If we are not able to send the tuple, we assume the destination
1725 : : * has closed and no more tuples can be sent. If that's the case,
1726 : : * end the loop.
1727 : : */
2921 peter_e@gmx.net 1728 [ - + ]: 6664378 : if (!dest->receiveSlot(slot, dest))
3379 rhaas@postgresql.org 1729 :UBC 0 : break;
1730 : : }
1731 : :
1732 : : /*
1733 : : * Count tuples processed, if this is a SELECT. (For other operation
1734 : : * types, the ModifyTable plan node must count the appropriate
1735 : : * events.)
1736 : : */
5810 tgl@sss.pgh.pa.us 1737 [ + + ]:CBC 6664378 : if (operation == CMD_SELECT)
1738 : 6661043 : (estate->es_processed)++;
1739 : :
1740 : : /*
1741 : : * check our tuple count.. if we've processed the proper number then
1742 : : * quit, else loop again and process more tuples. Zero numberTuples
1743 : : * means no limit.
1744 : : */
9081 1745 : 6664378 : current_tuple_count++;
8277 1746 [ + + + + ]: 6664378 : if (numberTuples && numberTuples == current_tuple_count)
10226 bruce@momjian.us 1747 : 47364 : break;
1748 : : }
1749 : :
1750 : : /*
1751 : : * If we know we won't need to back up, we can release resources at this
1752 : : * point.
1753 : : */
2121 tmunro@postgresql.or 1754 [ + + ]: 264682 : if (!(estate->es_top_eflags & EXEC_FLAG_BACKWARD))
1083 tgl@sss.pgh.pa.us 1755 : 261095 : ExecShutdownNode(planstate);
1756 : :
3613 rhaas@postgresql.org 1757 [ + + ]: 264682 : if (use_parallel_mode)
1758 : 342 : ExitParallelMode();
10651 scrappy@hub.org 1759 : 264682 : }
1760 : :
1761 : :
1762 : : /*
1763 : : * ExecRelCheck --- check that tuple meets check constraints for result relation
1764 : : *
1765 : : * Returns NULL if OK, else name of failed check constraint
1766 : : */
1767 : : static const char *
9064 tgl@sss.pgh.pa.us 1768 : 1391 : ExecRelCheck(ResultRelInfo *resultRelInfo,
1769 : : TupleTableSlot *slot, EState *estate)
1770 : : {
1771 : 1391 : Relation rel = resultRelInfo->ri_RelationDesc;
10225 bruce@momjian.us 1772 : 1391 : int ncheck = rel->rd_att->constr->num_check;
1773 : 1391 : ConstrCheck *check = rel->rd_att->constr->check;
1774 : : ExprContext *econtext;
1775 : : MemoryContext oldContext;
1776 : :
1777 : : /*
1778 : : * CheckNNConstraintFetch let this pass with only a warning, but now we
1779 : : * should fail rather than possibly failing to enforce an important
1780 : : * constraint.
1781 : : */
1614 tgl@sss.pgh.pa.us 1782 [ - + ]: 1391 : if (ncheck != rel->rd_rel->relchecks)
1614 tgl@sss.pgh.pa.us 1783 [ # # ]:UBC 0 : elog(ERROR, "%d pg_constraint record(s) missing for relation \"%s\"",
1784 : : rel->rd_rel->relchecks - ncheck, RelationGetRelationName(rel));
1785 : :
1786 : : /*
1787 : : * If first time through for this result relation, build expression
1788 : : * nodetrees for rel's constraint expressions. Keep them in the per-query
1789 : : * memory context so they'll survive throughout the query.
1790 : : */
162 peter@eisentraut.org 1791 [ + + ]:CBC 1391 : if (resultRelInfo->ri_CheckConstraintExprs == NULL)
1792 : : {
9064 tgl@sss.pgh.pa.us 1793 : 665 : oldContext = MemoryContextSwitchTo(estate->es_query_cxt);
162 peter@eisentraut.org 1794 : 665 : resultRelInfo->ri_CheckConstraintExprs = palloc0_array(ExprState *, ncheck);
1795 [ + + ]: 1670 : for (int i = 0; i < ncheck; i++)
1796 : : {
1797 : : Expr *checkconstr;
1798 : :
1799 : : /* Skip not enforced constraint */
238 1800 [ + + ]: 1008 : if (!check[i].ccenforced)
1801 : 102 : continue;
1802 : :
3098 andres@anarazel.de 1803 : 906 : checkconstr = stringToNode(check[i].ccbin);
211 peter@eisentraut.org 1804 : 906 : checkconstr = (Expr *) expand_generated_columns_in_expr((Node *) checkconstr, rel, 1);
162 1805 : 903 : resultRelInfo->ri_CheckConstraintExprs[i] =
3098 andres@anarazel.de 1806 : 906 : ExecPrepareExpr(checkconstr, estate);
1807 : : }
9064 tgl@sss.pgh.pa.us 1808 : 662 : MemoryContextSwitchTo(oldContext);
1809 : : }
1810 : :
1811 : : /*
1812 : : * We will use the EState's per-tuple context for evaluating constraint
1813 : : * expressions (creating it if it's not already there).
1814 : : */
8993 1815 [ + + ]: 1388 : econtext = GetPerTupleExprContext(estate);
1816 : :
1817 : : /* Arrange for econtext's scan tuple to be the tuple under test */
9162 1818 : 1388 : econtext->ecxt_scantuple = slot;
1819 : :
1820 : : /* And evaluate the constraints */
162 peter@eisentraut.org 1821 [ + + ]: 3114 : for (int i = 0; i < ncheck; i++)
1822 : : {
1823 : 1950 : ExprState *checkconstr = resultRelInfo->ri_CheckConstraintExprs[i];
1824 : :
1825 : : /*
1826 : : * NOTE: SQL specifies that a NULL result from a constraint expression
1827 : : * is not to be treated as a failure. Therefore, use ExecCheck not
1828 : : * ExecQual.
1829 : : */
238 1830 [ + + + + ]: 1950 : if (checkconstr && !ExecCheck(checkconstr, econtext))
9867 bruce@momjian.us 1831 : 224 : return check[i].ccname;
1832 : : }
1833 : :
1834 : : /* NULL result means no error */
8083 tgl@sss.pgh.pa.us 1835 : 1164 : return NULL;
1836 : : }
1837 : :
1838 : : /*
1839 : : * ExecPartitionCheck --- check that tuple meets the partition constraint.
1840 : : *
1841 : : * Returns true if it meets the partition constraint. If the constraint
1842 : : * fails and we're asked to emit an error, do so and don't return; otherwise
1843 : : * return false.
1844 : : */
1845 : : bool
3195 rhaas@postgresql.org 1846 : 6702 : ExecPartitionCheck(ResultRelInfo *resultRelInfo, TupleTableSlot *slot,
1847 : : EState *estate, bool emitError)
1848 : : {
1849 : : ExprContext *econtext;
1850 : : bool success;
1851 : :
1852 : : /*
1853 : : * If first time through, build expression state tree for the partition
1854 : : * check expression. (In the corner case where the partition check
1855 : : * expression is empty, ie there's a default partition and nothing else,
1856 : : * we'll be fooled into executing this code each time through. But it's
1857 : : * pretty darn cheap in that case, so we don't worry about it.)
1858 : : */
1859 [ + + ]: 6702 : if (resultRelInfo->ri_PartitionCheckExpr == NULL)
1860 : : {
1861 : : /*
1862 : : * Ensure that the qual tree and prepared expression are in the
1863 : : * query-lifespan context.
1864 : : */
1816 tgl@sss.pgh.pa.us 1865 : 1770 : MemoryContext oldcxt = MemoryContextSwitchTo(estate->es_query_cxt);
1866 : 1770 : List *qual = RelationGetPartitionQual(resultRelInfo->ri_RelationDesc);
1867 : :
3098 andres@anarazel.de 1868 : 1770 : resultRelInfo->ri_PartitionCheckExpr = ExecPrepareCheck(qual, estate);
1816 tgl@sss.pgh.pa.us 1869 : 1770 : MemoryContextSwitchTo(oldcxt);
1870 : : }
1871 : :
1872 : : /*
1873 : : * We will use the EState's per-tuple context for evaluating constraint
1874 : : * expressions (creating it if it's not already there).
1875 : : */
3195 rhaas@postgresql.org 1876 [ + + ]: 6702 : econtext = GetPerTupleExprContext(estate);
1877 : :
1878 : : /* Arrange for econtext's scan tuple to be the tuple under test */
1879 : 6702 : econtext->ecxt_scantuple = slot;
1880 : :
1881 : : /*
1882 : : * As in case of the cataloged constraints, we treat a NULL result as
1883 : : * success here, not a failure.
1884 : : */
2644 alvherre@alvh.no-ip. 1885 : 6702 : success = ExecCheck(resultRelInfo->ri_PartitionCheckExpr, econtext);
1886 : :
1887 : : /* if asked to emit error, don't actually return on failure */
1888 [ + + + + ]: 6702 : if (!success && emitError)
1889 : 101 : ExecPartitionCheckEmitError(resultRelInfo, slot, estate);
1890 : :
1891 : 6601 : return success;
1892 : : }
1893 : :
1894 : : /*
1895 : : * ExecPartitionCheckEmitError - Form and emit an error message after a failed
1896 : : * partition constraint check.
1897 : : */
1898 : : void
2801 rhaas@postgresql.org 1899 : 125 : ExecPartitionCheckEmitError(ResultRelInfo *resultRelInfo,
1900 : : TupleTableSlot *slot,
1901 : : EState *estate)
1902 : : {
1903 : : Oid root_relid;
1904 : : TupleDesc tupdesc;
1905 : : char *val_desc;
1906 : : Bitmapset *modifiedCols;
1907 : :
1908 : : /*
1909 : : * If the tuple has been routed, it's been converted to the partition's
1910 : : * rowtype, which might differ from the root table's. We must convert it
1911 : : * back to the root table's rowtype so that val_desc in the error message
1912 : : * matches the input tuple.
1913 : : */
1671 heikki.linnakangas@i 1914 [ + + ]: 125 : if (resultRelInfo->ri_RootResultRelInfo)
1915 : : {
1916 : 10 : ResultRelInfo *rootrel = resultRelInfo->ri_RootResultRelInfo;
1917 : : TupleDesc old_tupdesc;
1918 : : AttrMap *map;
1919 : :
1920 : 10 : root_relid = RelationGetRelid(rootrel->ri_RelationDesc);
1921 : 10 : tupdesc = RelationGetDescr(rootrel->ri_RelationDesc);
1922 : :
2444 alvherre@alvh.no-ip. 1923 : 10 : old_tupdesc = RelationGetDescr(resultRelInfo->ri_RelationDesc);
1924 : : /* a reverse map */
1012 1925 : 10 : map = build_attrmap_by_name_if_req(old_tupdesc, tupdesc, false);
1926 : :
1927 : : /*
1928 : : * Partition-specific slot's tupdesc can't be changed, so allocate a
1929 : : * new one.
1930 : : */
2801 rhaas@postgresql.org 1931 [ + + ]: 10 : if (map != NULL)
2531 andres@anarazel.de 1932 : 4 : slot = execute_attr_map_slot(map, slot,
1933 : : MakeTupleTableSlot(tupdesc, &TTSOpsVirtual));
1671 heikki.linnakangas@i 1934 : 10 : modifiedCols = bms_union(ExecGetInsertedCols(rootrel, estate),
1935 : 10 : ExecGetUpdatedCols(rootrel, estate));
1936 : : }
1937 : : else
1938 : : {
2444 alvherre@alvh.no-ip. 1939 : 115 : root_relid = RelationGetRelid(resultRelInfo->ri_RelationDesc);
1940 : 115 : tupdesc = RelationGetDescr(resultRelInfo->ri_RelationDesc);
1671 heikki.linnakangas@i 1941 : 115 : modifiedCols = bms_union(ExecGetInsertedCols(resultRelInfo, estate),
1942 : 115 : ExecGetUpdatedCols(resultRelInfo, estate));
1943 : : }
1944 : :
2444 alvherre@alvh.no-ip. 1945 : 125 : val_desc = ExecBuildSlotValueDescription(root_relid,
1946 : : slot,
1947 : : tupdesc,
1948 : : modifiedCols,
1949 : : 64);
2801 rhaas@postgresql.org 1950 [ + - + - ]: 125 : ereport(ERROR,
1951 : : (errcode(ERRCODE_CHECK_VIOLATION),
1952 : : errmsg("new row for relation \"%s\" violates partition constraint",
1953 : : RelationGetRelationName(resultRelInfo->ri_RelationDesc)),
1954 : : val_desc ? errdetail("Failing row contains %s.", val_desc) : 0,
1955 : : errtable(resultRelInfo->ri_RelationDesc)));
1956 : : }
1957 : :
1958 : : /*
1959 : : * ExecConstraints - check constraints of the tuple in 'slot'
1960 : : *
1961 : : * This checks the traditional NOT NULL and check constraints.
1962 : : *
1963 : : * The partition constraint is *NOT* checked.
1964 : : *
1965 : : * Note: 'slot' contains the tuple to check the constraints of, which may
1966 : : * have been converted from the original input tuple after tuple routing.
1967 : : * 'resultRelInfo' is the final result relation, after tuple routing.
1968 : : */
1969 : : void
8083 tgl@sss.pgh.pa.us 1970 : 2376758 : ExecConstraints(ResultRelInfo *resultRelInfo,
1971 : : TupleTableSlot *slot, EState *estate)
1972 : : {
9064 1973 : 2376758 : Relation rel = resultRelInfo->ri_RelationDesc;
4321 1974 : 2376758 : TupleDesc tupdesc = RelationGetDescr(rel);
1975 : 2376758 : TupleConstr *constr = tupdesc->constr;
1976 : : Bitmapset *modifiedCols;
162 peter@eisentraut.org 1977 : 2376758 : List *notnull_virtual_attrs = NIL;
1978 : :
1816 tgl@sss.pgh.pa.us 1979 [ - + ]: 2376758 : Assert(constr); /* we should not be called otherwise */
1980 : :
1981 : : /*
1982 : : * Verify not-null constraints.
1983 : : *
1984 : : * Not-null constraints on virtual generated columns are collected and
1985 : : * checked separately below.
1986 : : */
1987 [ + + ]: 2376758 : if (constr->has_not_null)
1988 : : {
162 peter@eisentraut.org 1989 [ + + ]: 8496760 : for (AttrNumber attnum = 1; attnum <= tupdesc->natts; attnum++)
1990 : : {
1991 : 6123097 : Form_pg_attribute att = TupleDescAttr(tupdesc, attnum - 1);
1992 : :
1993 [ + + + + ]: 6123097 : if (att->attnotnull && att->attgenerated == ATTRIBUTE_GENERATED_VIRTUAL)
1994 : 45 : notnull_virtual_attrs = lappend_int(notnull_virtual_attrs, attnum);
1995 [ + + + + ]: 6123052 : else if (att->attnotnull && slot_attisnull(slot, attnum))
1996 : 157 : ReportNotNullViolationError(resultRelInfo, slot, estate, attnum);
1997 : : }
1998 : : }
1999 : :
2000 : : /*
2001 : : * Verify not-null constraints on virtual generated column, if any.
2002 : : */
2003 [ + + ]: 2376601 : if (notnull_virtual_attrs)
2004 : : {
2005 : : AttrNumber attnum;
2006 : :
2007 : 45 : attnum = ExecRelGenVirtualNotNull(resultRelInfo, slot, estate,
2008 : : notnull_virtual_attrs);
2009 [ + + ]: 45 : if (attnum != InvalidAttrNumber)
2010 : 21 : ReportNotNullViolationError(resultRelInfo, slot, estate, attnum);
2011 : : }
2012 : :
2013 : : /*
2014 : : * Verify check constraints.
2015 : : */
1614 tgl@sss.pgh.pa.us 2016 [ + + ]: 2376580 : if (rel->rd_rel->relchecks > 0)
2017 : : {
2018 : : const char *failed;
2019 : :
9064 2020 [ + + ]: 1391 : if ((failed = ExecRelCheck(resultRelInfo, slot, estate)) != NULL)
2021 : : {
2022 : : char *val_desc;
3167 rhaas@postgresql.org 2023 : 224 : Relation orig_rel = rel;
2024 : :
2025 : : /*
2026 : : * If the tuple has been routed, it's been converted to the
2027 : : * partition's rowtype, which might differ from the root table's.
2028 : : * We must convert it back to the root table's rowtype so that
2029 : : * val_desc shown error message matches the input tuple.
2030 : : */
1671 heikki.linnakangas@i 2031 [ + + ]: 224 : if (resultRelInfo->ri_RootResultRelInfo)
2032 : : {
2033 : 45 : ResultRelInfo *rootrel = resultRelInfo->ri_RootResultRelInfo;
3071 rhaas@postgresql.org 2034 : 45 : TupleDesc old_tupdesc = RelationGetDescr(rel);
2035 : : AttrMap *map;
2036 : :
1671 heikki.linnakangas@i 2037 : 45 : tupdesc = RelationGetDescr(rootrel->ri_RelationDesc);
2038 : : /* a reverse map */
2089 michael@paquier.xyz 2039 : 45 : map = build_attrmap_by_name_if_req(old_tupdesc,
2040 : : tupdesc,
2041 : : false);
2042 : :
2043 : : /*
2044 : : * Partition-specific slot's tupdesc can't be changed, so
2045 : : * allocate a new one.
2046 : : */
3071 rhaas@postgresql.org 2047 [ + + ]: 45 : if (map != NULL)
2531 andres@anarazel.de 2048 : 30 : slot = execute_attr_map_slot(map, slot,
2049 : : MakeTupleTableSlot(tupdesc, &TTSOpsVirtual));
1671 heikki.linnakangas@i 2050 : 45 : modifiedCols = bms_union(ExecGetInsertedCols(rootrel, estate),
2051 : 45 : ExecGetUpdatedCols(rootrel, estate));
2052 : 45 : rel = rootrel->ri_RelationDesc;
2053 : : }
2054 : : else
2055 : 179 : modifiedCols = bms_union(ExecGetInsertedCols(resultRelInfo, estate),
2056 : 179 : ExecGetUpdatedCols(resultRelInfo, estate));
3890 sfrost@snowman.net 2057 : 224 : val_desc = ExecBuildSlotValueDescription(RelationGetRelid(rel),
2058 : : slot,
2059 : : tupdesc,
2060 : : modifiedCols,
2061 : : 64);
8083 tgl@sss.pgh.pa.us 2062 [ + - + - ]: 224 : ereport(ERROR,
2063 : : (errcode(ERRCODE_CHECK_VIOLATION),
2064 : : errmsg("new row for relation \"%s\" violates check constraint \"%s\"",
2065 : : RelationGetRelationName(orig_rel), failed),
2066 : : val_desc ? errdetail("Failing row contains %s.", val_desc) : 0,
2067 : : errtableconstraint(orig_rel, failed)));
2068 : : }
2069 : : }
10242 vadim4o@yahoo.com 2070 : 2376353 : }
2071 : :
2072 : : /*
2073 : : * Verify not-null constraints on virtual generated columns of the given
2074 : : * tuple slot.
2075 : : *
2076 : : * Return value of InvalidAttrNumber means all not-null constraints on virtual
2077 : : * generated columns are satisfied. A return value > 0 means a not-null
2078 : : * violation happened for that attribute.
2079 : : *
2080 : : * notnull_virtual_attrs is the list of the attnums of virtual generated column with
2081 : : * not-null constraints.
2082 : : */
2083 : : AttrNumber
162 peter@eisentraut.org 2084 : 87 : ExecRelGenVirtualNotNull(ResultRelInfo *resultRelInfo, TupleTableSlot *slot,
2085 : : EState *estate, List *notnull_virtual_attrs)
2086 : : {
2087 : 87 : Relation rel = resultRelInfo->ri_RelationDesc;
2088 : : ExprContext *econtext;
2089 : : MemoryContext oldContext;
2090 : :
2091 : : /*
2092 : : * We implement this by building a NullTest node for each virtual
2093 : : * generated column, which we cache in resultRelInfo, and running those
2094 : : * through ExecCheck().
2095 : : */
2096 [ + + ]: 87 : if (resultRelInfo->ri_GenVirtualNotNullConstraintExprs == NULL)
2097 : : {
2098 : 63 : oldContext = MemoryContextSwitchTo(estate->es_query_cxt);
2099 : 63 : resultRelInfo->ri_GenVirtualNotNullConstraintExprs =
2100 : 63 : palloc0_array(ExprState *, list_length(notnull_virtual_attrs));
2101 : :
2102 [ + - + + : 204 : foreach_int(attnum, notnull_virtual_attrs)
+ + ]
2103 : : {
2104 : 78 : int i = foreach_current_index(attnum);
2105 : : NullTest *nnulltest;
2106 : :
2107 : : /* "generated_expression IS NOT NULL" check. */
2108 : 78 : nnulltest = makeNode(NullTest);
2109 : 78 : nnulltest->arg = (Expr *) build_generation_expression(rel, attnum);
2110 : 78 : nnulltest->nulltesttype = IS_NOT_NULL;
2111 : 78 : nnulltest->argisrow = false;
2112 : 78 : nnulltest->location = -1;
2113 : :
2114 : 78 : resultRelInfo->ri_GenVirtualNotNullConstraintExprs[i] =
2115 : 78 : ExecPrepareExpr((Expr *) nnulltest, estate);
2116 : : }
2117 : 63 : MemoryContextSwitchTo(oldContext);
2118 : : }
2119 : :
2120 : : /*
2121 : : * We will use the EState's per-tuple context for evaluating virtual
2122 : : * generated column not null constraint expressions (creating it if it's
2123 : : * not already there).
2124 : : */
2125 [ + + ]: 87 : econtext = GetPerTupleExprContext(estate);
2126 : :
2127 : : /* Arrange for econtext's scan tuple to be the tuple under test */
2128 : 87 : econtext->ecxt_scantuple = slot;
2129 : :
2130 : : /* And evaluate the check constraints for virtual generated column */
2131 [ + - + + : 216 : foreach_int(attnum, notnull_virtual_attrs)
+ + ]
2132 : : {
2133 : 114 : int i = foreach_current_index(attnum);
2134 : 114 : ExprState *exprstate = resultRelInfo->ri_GenVirtualNotNullConstraintExprs[i];
2135 : :
2136 [ - + ]: 114 : Assert(exprstate != NULL);
2137 [ + + ]: 114 : if (!ExecCheck(exprstate, econtext))
2138 : 36 : return attnum;
2139 : : }
2140 : :
2141 : : /* InvalidAttrNumber result means no error */
2142 : 51 : return InvalidAttrNumber;
2143 : : }
2144 : :
2145 : : /*
2146 : : * Report a violation of a not-null constraint that was already detected.
2147 : : */
2148 : : static void
2149 : 178 : ReportNotNullViolationError(ResultRelInfo *resultRelInfo, TupleTableSlot *slot,
2150 : : EState *estate, int attnum)
2151 : : {
2152 : : Bitmapset *modifiedCols;
2153 : : char *val_desc;
2154 : 178 : Relation rel = resultRelInfo->ri_RelationDesc;
2155 : 178 : Relation orig_rel = rel;
2156 : 178 : TupleDesc tupdesc = RelationGetDescr(rel);
2157 : 178 : TupleDesc orig_tupdesc = RelationGetDescr(rel);
2158 : 178 : Form_pg_attribute att = TupleDescAttr(tupdesc, attnum - 1);
2159 : :
2160 [ - + ]: 178 : Assert(attnum > 0);
2161 : :
2162 : : /*
2163 : : * If the tuple has been routed, it's been converted to the partition's
2164 : : * rowtype, which might differ from the root table's. We must convert it
2165 : : * back to the root table's rowtype so that val_desc shown error message
2166 : : * matches the input tuple.
2167 : : */
2168 [ + + ]: 178 : if (resultRelInfo->ri_RootResultRelInfo)
2169 : : {
2170 : 36 : ResultRelInfo *rootrel = resultRelInfo->ri_RootResultRelInfo;
2171 : : AttrMap *map;
2172 : :
2173 : 36 : tupdesc = RelationGetDescr(rootrel->ri_RelationDesc);
2174 : : /* a reverse map */
2175 : 36 : map = build_attrmap_by_name_if_req(orig_tupdesc,
2176 : : tupdesc,
2177 : : false);
2178 : :
2179 : : /*
2180 : : * Partition-specific slot's tupdesc can't be changed, so allocate a
2181 : : * new one.
2182 : : */
2183 [ + + ]: 36 : if (map != NULL)
2184 : 21 : slot = execute_attr_map_slot(map, slot,
2185 : : MakeTupleTableSlot(tupdesc, &TTSOpsVirtual));
2186 : 36 : modifiedCols = bms_union(ExecGetInsertedCols(rootrel, estate),
2187 : 36 : ExecGetUpdatedCols(rootrel, estate));
2188 : 36 : rel = rootrel->ri_RelationDesc;
2189 : : }
2190 : : else
2191 : 142 : modifiedCols = bms_union(ExecGetInsertedCols(resultRelInfo, estate),
2192 : 142 : ExecGetUpdatedCols(resultRelInfo, estate));
2193 : :
2194 : 178 : val_desc = ExecBuildSlotValueDescription(RelationGetRelid(rel),
2195 : : slot,
2196 : : tupdesc,
2197 : : modifiedCols,
2198 : : 64);
2199 [ + - + - ]: 178 : ereport(ERROR,
2200 : : errcode(ERRCODE_NOT_NULL_VIOLATION),
2201 : : errmsg("null value in column \"%s\" of relation \"%s\" violates not-null constraint",
2202 : : NameStr(att->attname),
2203 : : RelationGetRelationName(orig_rel)),
2204 : : val_desc ? errdetail("Failing row contains %s.", val_desc) : 0,
2205 : : errtablecol(orig_rel, attnum));
2206 : : }
2207 : :
2208 : : /*
2209 : : * ExecWithCheckOptions -- check that tuple satisfies any WITH CHECK OPTIONs
2210 : : * of the specified kind.
2211 : : *
2212 : : * Note that this needs to be called multiple times to ensure that all kinds of
2213 : : * WITH CHECK OPTIONs are handled (both those from views which have the WITH
2214 : : * CHECK OPTION set and from row-level security policies). See ExecInsert()
2215 : : * and ExecUpdate().
2216 : : */
2217 : : void
3788 sfrost@snowman.net 2218 : 1051 : ExecWithCheckOptions(WCOKind kind, ResultRelInfo *resultRelInfo,
2219 : : TupleTableSlot *slot, EState *estate)
2220 : : {
3890 2221 : 1051 : Relation rel = resultRelInfo->ri_RelationDesc;
2222 : 1051 : TupleDesc tupdesc = RelationGetDescr(rel);
2223 : : ExprContext *econtext;
2224 : : ListCell *l1,
2225 : : *l2;
2226 : :
2227 : : /*
2228 : : * We will use the EState's per-tuple context for evaluating constraint
2229 : : * expressions (creating it if it's not already there).
2230 : : */
4433 2231 [ + + ]: 1051 : econtext = GetPerTupleExprContext(estate);
2232 : :
2233 : : /* Arrange for econtext's scan tuple to be the tuple under test */
2234 : 1051 : econtext->ecxt_scantuple = slot;
2235 : :
2236 : : /* Check each of the constraints */
2237 [ + - + + : 2531 : forboth(l1, resultRelInfo->ri_WithCheckOptions,
+ - + + +
+ + - +
+ ]
2238 : : l2, resultRelInfo->ri_WithCheckOptionExprs)
2239 : : {
2240 : 1741 : WithCheckOption *wco = (WithCheckOption *) lfirst(l1);
4141 bruce@momjian.us 2241 : 1741 : ExprState *wcoExpr = (ExprState *) lfirst(l2);
2242 : :
2243 : : /*
2244 : : * Skip any WCOs which are not the kind we are looking for at this
2245 : : * time.
2246 : : */
3788 sfrost@snowman.net 2247 [ + + ]: 1741 : if (wco->kind != kind)
2248 : 980 : continue;
2249 : :
2250 : : /*
2251 : : * WITH CHECK OPTION checks are intended to ensure that the new tuple
2252 : : * is visible (in the case of a view) or that it passes the
2253 : : * 'with-check' policy (in the case of row security). If the qual
2254 : : * evaluates to NULL or FALSE, then the new tuple won't be included in
2255 : : * the view or doesn't pass the 'with-check' policy for the table.
2256 : : */
3098 andres@anarazel.de 2257 [ + + ]: 761 : if (!ExecQual(wcoExpr, econtext))
2258 : : {
2259 : : char *val_desc;
2260 : : Bitmapset *modifiedCols;
2261 : :
3788 sfrost@snowman.net 2262 [ + + + + : 261 : switch (wco->kind)
- ]
2263 : : {
2264 : : /*
2265 : : * For WITH CHECK OPTIONs coming from views, we might be
2266 : : * able to provide the details on the row, depending on
2267 : : * the permissions on the relation (that is, if the user
2268 : : * could view it directly anyway). For RLS violations, we
2269 : : * don't include the data since we don't know if the user
2270 : : * should be able to view the tuple as that depends on the
2271 : : * USING policy.
2272 : : */
2273 : 114 : case WCO_VIEW_CHECK:
2274 : : /* See the comment in ExecConstraints(). */
1671 heikki.linnakangas@i 2275 [ + + ]: 114 : if (resultRelInfo->ri_RootResultRelInfo)
2276 : : {
2277 : 21 : ResultRelInfo *rootrel = resultRelInfo->ri_RootResultRelInfo;
2973 rhaas@postgresql.org 2278 : 21 : TupleDesc old_tupdesc = RelationGetDescr(rel);
2279 : : AttrMap *map;
2280 : :
1671 heikki.linnakangas@i 2281 : 21 : tupdesc = RelationGetDescr(rootrel->ri_RelationDesc);
2282 : : /* a reverse map */
2089 michael@paquier.xyz 2283 : 21 : map = build_attrmap_by_name_if_req(old_tupdesc,
2284 : : tupdesc,
2285 : : false);
2286 : :
2287 : : /*
2288 : : * Partition-specific slot's tupdesc can't be changed,
2289 : : * so allocate a new one.
2290 : : */
2973 rhaas@postgresql.org 2291 [ + + ]: 21 : if (map != NULL)
2531 andres@anarazel.de 2292 : 12 : slot = execute_attr_map_slot(map, slot,
2293 : : MakeTupleTableSlot(tupdesc, &TTSOpsVirtual));
2294 : :
1671 heikki.linnakangas@i 2295 : 21 : modifiedCols = bms_union(ExecGetInsertedCols(rootrel, estate),
2296 : 21 : ExecGetUpdatedCols(rootrel, estate));
2297 : 21 : rel = rootrel->ri_RelationDesc;
2298 : : }
2299 : : else
2300 : 93 : modifiedCols = bms_union(ExecGetInsertedCols(resultRelInfo, estate),
2301 : 93 : ExecGetUpdatedCols(resultRelInfo, estate));
3788 sfrost@snowman.net 2302 : 114 : val_desc = ExecBuildSlotValueDescription(RelationGetRelid(rel),
2303 : : slot,
2304 : : tupdesc,
2305 : : modifiedCols,
2306 : : 64);
2307 : :
2308 [ + - + - ]: 114 : ereport(ERROR,
2309 : : (errcode(ERRCODE_WITH_CHECK_OPTION_VIOLATION),
2310 : : errmsg("new row violates check option for view \"%s\"",
2311 : : wco->relname),
2312 : : val_desc ? errdetail("Failing row contains %s.",
2313 : : val_desc) : 0));
2314 : : break;
2315 : 123 : case WCO_RLS_INSERT_CHECK:
2316 : : case WCO_RLS_UPDATE_CHECK:
3644 2317 [ + + ]: 123 : if (wco->polname != NULL)
2318 [ + - ]: 30 : ereport(ERROR,
2319 : : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
2320 : : errmsg("new row violates row-level security policy \"%s\" for table \"%s\"",
2321 : : wco->polname, wco->relname)));
2322 : : else
2323 [ + - ]: 93 : ereport(ERROR,
2324 : : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
2325 : : errmsg("new row violates row-level security policy for table \"%s\"",
2326 : : wco->relname)));
2327 : : break;
1258 alvherre@alvh.no-ip. 2328 : 12 : case WCO_RLS_MERGE_UPDATE_CHECK:
2329 : : case WCO_RLS_MERGE_DELETE_CHECK:
2330 [ - + ]: 12 : if (wco->polname != NULL)
1258 alvherre@alvh.no-ip. 2331 [ # # ]:UBC 0 : ereport(ERROR,
2332 : : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
2333 : : errmsg("target row violates row-level security policy \"%s\" (USING expression) for table \"%s\"",
2334 : : wco->polname, wco->relname)));
2335 : : else
1258 alvherre@alvh.no-ip. 2336 [ + - ]:CBC 12 : ereport(ERROR,
2337 : : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
2338 : : errmsg("target row violates row-level security policy (USING expression) for table \"%s\"",
2339 : : wco->relname)));
2340 : : break;
3774 andres@anarazel.de 2341 : 12 : case WCO_RLS_CONFLICT_CHECK:
3644 sfrost@snowman.net 2342 [ - + ]: 12 : if (wco->polname != NULL)
3644 sfrost@snowman.net 2343 [ # # ]:UBC 0 : ereport(ERROR,
2344 : : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
2345 : : errmsg("new row violates row-level security policy \"%s\" (USING expression) for table \"%s\"",
2346 : : wco->polname, wco->relname)));
2347 : : else
3644 sfrost@snowman.net 2348 [ + - ]:CBC 12 : ereport(ERROR,
2349 : : (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
2350 : : errmsg("new row violates row-level security policy (USING expression) for table \"%s\"",
2351 : : wco->relname)));
2352 : : break;
3788 sfrost@snowman.net 2353 :UBC 0 : default:
2354 [ # # ]: 0 : elog(ERROR, "unrecognized WCO kind: %u", wco->kind);
2355 : : break;
2356 : : }
2357 : : }
2358 : : }
4433 sfrost@snowman.net 2359 :CBC 790 : }
2360 : :
2361 : : /*
2362 : : * ExecBuildSlotValueDescription -- construct a string representing a tuple
2363 : : *
2364 : : * This is intentionally very similar to BuildIndexValueDescription, but
2365 : : * unlike that function, we truncate long field values (to at most maxfieldlen
2366 : : * bytes). That seems necessary here since heap field values could be very
2367 : : * long, whereas index entries typically aren't so wide.
2368 : : *
2369 : : * Also, unlike the case with index entries, we need to be prepared to ignore
2370 : : * dropped columns. We used to use the slot's tuple descriptor to decode the
2371 : : * data, but the slot's descriptor doesn't identify dropped columns, so we
2372 : : * now need to be passed the relation's descriptor.
2373 : : *
2374 : : * Note that, like BuildIndexValueDescription, if the user does not have
2375 : : * permission to view any of the columns involved, a NULL is returned. Unlike
2376 : : * BuildIndexValueDescription, if the user has access to view a subset of the
2377 : : * column involved, that subset will be returned with a key identifying which
2378 : : * columns they are.
2379 : : */
2380 : : char *
3890 2381 : 753 : ExecBuildSlotValueDescription(Oid reloid,
2382 : : TupleTableSlot *slot,
2383 : : TupleDesc tupdesc,
2384 : : Bitmapset *modifiedCols,
2385 : : int maxfieldlen)
2386 : : {
2387 : : StringInfoData buf;
2388 : : StringInfoData collist;
4321 tgl@sss.pgh.pa.us 2389 : 753 : bool write_comma = false;
3890 sfrost@snowman.net 2390 : 753 : bool write_comma_collist = false;
2391 : : int i;
2392 : : AclResult aclresult;
2393 : 753 : bool table_perm = false;
2394 : 753 : bool any_perm = false;
2395 : :
2396 : : /*
2397 : : * Check if RLS is enabled and should be active for the relation; if so,
2398 : : * then don't return anything. Otherwise, go through normal permission
2399 : : * checks.
2400 : : */
3693 mail@joeconway.com 2401 [ - + ]: 753 : if (check_enable_rls(reloid, InvalidOid, true) == RLS_ENABLED)
3890 sfrost@snowman.net 2402 :UBC 0 : return NULL;
2403 : :
5030 tgl@sss.pgh.pa.us 2404 :CBC 753 : initStringInfo(&buf);
2405 : :
2406 : 753 : appendStringInfoChar(&buf, '(');
2407 : :
2408 : : /*
2409 : : * Check if the user has permissions to see the row. Table-level SELECT
2410 : : * allows access to all columns. If the user does not have table-level
2411 : : * SELECT then we check each column and include those the user has SELECT
2412 : : * rights on. Additionally, we always include columns the user provided
2413 : : * data for.
2414 : : */
3890 sfrost@snowman.net 2415 : 753 : aclresult = pg_class_aclcheck(reloid, GetUserId(), ACL_SELECT);
2416 [ + + ]: 753 : if (aclresult != ACLCHECK_OK)
2417 : : {
2418 : : /* Set up the buffer for the column list */
2419 : 30 : initStringInfo(&collist);
2420 : 30 : appendStringInfoChar(&collist, '(');
2421 : : }
2422 : : else
2423 : 723 : table_perm = any_perm = true;
2424 : :
2425 : : /* Make sure the tuple is fully deconstructed */
2426 : 753 : slot_getallattrs(slot);
2427 : :
5030 tgl@sss.pgh.pa.us 2428 [ + + ]: 2709 : for (i = 0; i < tupdesc->natts; i++)
2429 : : {
3890 sfrost@snowman.net 2430 : 1956 : bool column_perm = false;
2431 : : char *val;
2432 : : int vallen;
2939 andres@anarazel.de 2433 : 1956 : Form_pg_attribute att = TupleDescAttr(tupdesc, i);
2434 : :
2435 : : /* ignore dropped columns */
2436 [ + + ]: 1956 : if (att->attisdropped)
4321 tgl@sss.pgh.pa.us 2437 : 19 : continue;
2438 : :
3890 sfrost@snowman.net 2439 [ + + ]: 1937 : if (!table_perm)
2440 : : {
2441 : : /*
2442 : : * No table-level SELECT, so need to make sure they either have
2443 : : * SELECT rights on the column or that they have provided the data
2444 : : * for the column. If not, omit this column from the error
2445 : : * message.
2446 : : */
2939 andres@anarazel.de 2447 : 117 : aclresult = pg_attribute_aclcheck(reloid, att->attnum,
2448 : : GetUserId(), ACL_SELECT);
2449 [ + + ]: 117 : if (bms_is_member(att->attnum - FirstLowInvalidHeapAttributeNumber,
3890 sfrost@snowman.net 2450 [ + + ]: 69 : modifiedCols) || aclresult == ACLCHECK_OK)
2451 : : {
2452 : 72 : column_perm = any_perm = true;
2453 : :
2454 [ + + ]: 72 : if (write_comma_collist)
2455 : 42 : appendStringInfoString(&collist, ", ");
2456 : : else
2457 : 30 : write_comma_collist = true;
2458 : :
2939 andres@anarazel.de 2459 : 72 : appendStringInfoString(&collist, NameStr(att->attname));
2460 : : }
2461 : : }
2462 : :
3890 sfrost@snowman.net 2463 [ + + + + ]: 1937 : if (table_perm || column_perm)
2464 : : {
211 peter@eisentraut.org 2465 [ + + ]: 1892 : if (att->attgenerated == ATTRIBUTE_GENERATED_VIRTUAL)
2466 : 27 : val = "virtual";
2467 [ + + ]: 1865 : else if (slot->tts_isnull[i])
3890 sfrost@snowman.net 2468 : 317 : val = "null";
2469 : : else
2470 : : {
2471 : : Oid foutoid;
2472 : : bool typisvarlena;
2473 : :
2939 andres@anarazel.de 2474 : 1548 : getTypeOutputInfo(att->atttypid,
2475 : : &foutoid, &typisvarlena);
3890 sfrost@snowman.net 2476 : 1548 : val = OidOutputFunctionCall(foutoid, slot->tts_values[i]);
2477 : : }
2478 : :
2479 [ + + ]: 1892 : if (write_comma)
2480 : 1139 : appendStringInfoString(&buf, ", ");
2481 : : else
2482 : 753 : write_comma = true;
2483 : :
2484 : : /* truncate if needed */
2485 : 1892 : vallen = strlen(val);
2486 [ + + ]: 1892 : if (vallen <= maxfieldlen)
2237 drowley@postgresql.o 2487 : 1891 : appendBinaryStringInfo(&buf, val, vallen);
2488 : : else
2489 : : {
3890 sfrost@snowman.net 2490 : 1 : vallen = pg_mbcliplen(val, vallen, maxfieldlen);
2491 : 1 : appendBinaryStringInfo(&buf, val, vallen);
2492 : 1 : appendStringInfoString(&buf, "...");
2493 : : }
2494 : : }
2495 : : }
2496 : :
2497 : : /* If we end up with zero columns being returned, then return NULL. */
2498 [ - + ]: 753 : if (!any_perm)
3890 sfrost@snowman.net 2499 :UBC 0 : return NULL;
2500 : :
5030 tgl@sss.pgh.pa.us 2501 :CBC 753 : appendStringInfoChar(&buf, ')');
2502 : :
3890 sfrost@snowman.net 2503 [ + + ]: 753 : if (!table_perm)
2504 : : {
2505 : 30 : appendStringInfoString(&collist, ") = ");
2237 drowley@postgresql.o 2506 : 30 : appendBinaryStringInfo(&collist, buf.data, buf.len);
2507 : :
3890 sfrost@snowman.net 2508 : 30 : return collist.data;
2509 : : }
2510 : :
5030 tgl@sss.pgh.pa.us 2511 : 723 : return buf.data;
2512 : : }
2513 : :
2514 : :
2515 : : /*
2516 : : * ExecUpdateLockMode -- find the appropriate UPDATE tuple lock mode for a
2517 : : * given ResultRelInfo
2518 : : */
2519 : : LockTupleMode
3774 andres@anarazel.de 2520 : 3926 : ExecUpdateLockMode(EState *estate, ResultRelInfo *relinfo)
2521 : : {
2522 : : Bitmapset *keyCols;
2523 : : Bitmapset *updatedCols;
2524 : :
2525 : : /*
2526 : : * Compute lock mode to use. If columns that are part of the key have not
2527 : : * been modified, then we can use a weaker lock, allowing for better
2528 : : * concurrency.
2529 : : */
1671 heikki.linnakangas@i 2530 : 3926 : updatedCols = ExecGetAllUpdatedCols(relinfo, estate);
3774 andres@anarazel.de 2531 : 3926 : keyCols = RelationGetIndexAttrBitmap(relinfo->ri_RelationDesc,
2532 : : INDEX_ATTR_BITMAP_KEY);
2533 : :
2534 [ + + ]: 3926 : if (bms_overlap(keyCols, updatedCols))
2535 : 132 : return LockTupleExclusive;
2536 : :
2537 : 3794 : return LockTupleNoKeyExclusive;
2538 : : }
2539 : :
2540 : : /*
2541 : : * ExecFindRowMark -- find the ExecRowMark struct for given rangetable index
2542 : : *
2543 : : * If no such struct, either return NULL or throw error depending on missing_ok
2544 : : */
2545 : : ExecRowMark *
3770 tgl@sss.pgh.pa.us 2546 : 5463 : ExecFindRowMark(EState *estate, Index rti, bool missing_ok)
2547 : : {
2525 2548 [ + - + - ]: 5463 : if (rti > 0 && rti <= estate->es_range_table_size &&
2549 [ + - ]: 5463 : estate->es_rowmarks != NULL)
2550 : : {
2551 : 5463 : ExecRowMark *erm = estate->es_rowmarks[rti - 1];
2552 : :
2553 [ + - ]: 5463 : if (erm)
5351 2554 : 5463 : return erm;
2555 : : }
3770 tgl@sss.pgh.pa.us 2556 [ # # ]:UBC 0 : if (!missing_ok)
2557 [ # # ]: 0 : elog(ERROR, "failed to find ExecRowMark for rangetable index %u", rti);
2558 : 0 : return NULL;
2559 : : }
2560 : :
2561 : : /*
2562 : : * ExecBuildAuxRowMark -- create an ExecAuxRowMark struct
2563 : : *
2564 : : * Inputs are the underlying ExecRowMark struct and the targetlist of the
2565 : : * input plan node (not planstate node!). We need the latter to find out
2566 : : * the column numbers of the resjunk columns.
2567 : : */
2568 : : ExecAuxRowMark *
5351 tgl@sss.pgh.pa.us 2569 :CBC 5463 : ExecBuildAuxRowMark(ExecRowMark *erm, List *targetlist)
2570 : : {
2571 : 5463 : ExecAuxRowMark *aerm = (ExecAuxRowMark *) palloc0(sizeof(ExecAuxRowMark));
2572 : : char resname[32];
2573 : :
2574 : 5463 : aerm->rowmark = erm;
2575 : :
2576 : : /* Look up the resjunk columns associated with this rowmark */
3821 2577 [ + + ]: 5463 : if (erm->markType != ROW_MARK_COPY)
2578 : : {
2579 : : /* need ctid for all methods other than COPY */
5323 2580 : 5321 : snprintf(resname, sizeof(resname), "ctid%u", erm->rowmarkId);
5351 2581 : 5321 : aerm->ctidAttNo = ExecFindJunkAttributeInTlist(targetlist,
2582 : : resname);
5323 2583 [ - + ]: 5321 : if (!AttributeNumberIsValid(aerm->ctidAttNo))
5323 tgl@sss.pgh.pa.us 2584 [ # # ]:UBC 0 : elog(ERROR, "could not find junk %s column", resname);
2585 : : }
2586 : : else
2587 : : {
2588 : : /* need wholerow if COPY */
5323 tgl@sss.pgh.pa.us 2589 :CBC 142 : snprintf(resname, sizeof(resname), "wholerow%u", erm->rowmarkId);
5351 2590 : 142 : aerm->wholeAttNo = ExecFindJunkAttributeInTlist(targetlist,
2591 : : resname);
5323 2592 [ - + ]: 142 : if (!AttributeNumberIsValid(aerm->wholeAttNo))
5323 tgl@sss.pgh.pa.us 2593 [ # # ]:UBC 0 : elog(ERROR, "could not find junk %s column", resname);
2594 : : }
2595 : :
2596 : : /* if child rel, need tableoid */
3821 tgl@sss.pgh.pa.us 2597 [ + + ]:CBC 5463 : if (erm->rti != erm->prti)
2598 : : {
2599 : 983 : snprintf(resname, sizeof(resname), "tableoid%u", erm->rowmarkId);
2600 : 983 : aerm->toidAttNo = ExecFindJunkAttributeInTlist(targetlist,
2601 : : resname);
2602 [ - + ]: 983 : if (!AttributeNumberIsValid(aerm->toidAttNo))
3821 tgl@sss.pgh.pa.us 2603 [ # # ]:UBC 0 : elog(ERROR, "could not find junk %s column", resname);
2604 : : }
2605 : :
5351 tgl@sss.pgh.pa.us 2606 :CBC 5463 : return aerm;
2607 : : }
2608 : :
2609 : :
2610 : : /*
2611 : : * EvalPlanQual logic --- recheck modified tuple(s) to see if we want to
2612 : : * process the updated version under READ COMMITTED rules.
2613 : : *
2614 : : * See backend/executor/README for some info about how this works.
2615 : : */
2616 : :
2617 : :
2618 : : /*
2619 : : * Check the updated version of a tuple to see if we want to process it under
2620 : : * READ COMMITTED rules.
2621 : : *
2622 : : * epqstate - state for EvalPlanQual rechecking
2623 : : * relation - table containing tuple
2624 : : * rti - rangetable index of table containing tuple
2625 : : * inputslot - tuple for processing - this can be the slot from
2626 : : * EvalPlanQualSlot() for this rel, for increased efficiency.
2627 : : *
2628 : : * This tests whether the tuple in inputslot still matches the relevant
2629 : : * quals. For that result to be useful, typically the input tuple has to be
2630 : : * last row version (otherwise the result isn't particularly useful) and
2631 : : * locked (otherwise the result might be out of date). That's typically
2632 : : * achieved by using table_tuple_lock() with the
2633 : : * TUPLE_LOCK_FLAG_FIND_LAST_VERSION flag.
2634 : : *
2635 : : * Returns a slot containing the new candidate update/delete tuple, or
2636 : : * NULL if we determine we shouldn't process the row.
2637 : : */
2638 : : TupleTableSlot *
2193 andres@anarazel.de 2639 : 132 : EvalPlanQual(EPQState *epqstate, Relation relation,
2640 : : Index rti, TupleTableSlot *inputslot)
2641 : : {
2642 : : TupleTableSlot *slot;
2643 : : TupleTableSlot *testslot;
2644 : :
5794 tgl@sss.pgh.pa.us 2645 [ - + ]: 132 : Assert(rti > 0);
2646 : :
2647 : : /*
2648 : : * Need to run a recheck subquery. Initialize or reinitialize EPQ state.
2649 : : */
2193 andres@anarazel.de 2650 : 132 : EvalPlanQualBegin(epqstate);
2651 : :
2652 : : /*
2653 : : * Callers will often use the EvalPlanQualSlot to store the tuple to avoid
2654 : : * an unnecessary copy.
2655 : : */
2381 2656 : 132 : testslot = EvalPlanQualSlot(epqstate, relation, rti);
2359 2657 [ + + ]: 132 : if (testslot != inputslot)
2658 : 6 : ExecCopySlot(testslot, inputslot);
2659 : :
2660 : : /*
2661 : : * Mark that an EPQ tuple is available for this relation. (If there is
2662 : : * more than one result relation, the others remain marked as having no
2663 : : * tuple available.)
2664 : : */
841 tgl@sss.pgh.pa.us 2665 : 132 : epqstate->relsubs_done[rti - 1] = false;
2666 : 132 : epqstate->relsubs_blocked[rti - 1] = false;
2667 : :
2668 : : /*
2669 : : * Run the EPQ query. We assume it will return at most one tuple.
2670 : : */
5794 2671 : 132 : slot = EvalPlanQualNext(epqstate);
2672 : :
2673 : : /*
2674 : : * If we got a tuple, force the slot to materialize the tuple so that it
2675 : : * is not dependent on any local state in the EPQ query (in particular,
2676 : : * it's highly likely that the slot contains references to any pass-by-ref
2677 : : * datums that may be present in copyTuple). As with the next step, this
2678 : : * is to guard against early re-use of the EPQ query.
2679 : : */
5748 2680 [ + + + + ]: 132 : if (!TupIsNull(slot))
2487 andres@anarazel.de 2681 : 98 : ExecMaterializeSlot(slot);
2682 : :
2683 : : /*
2684 : : * Clear out the test tuple, and mark that no tuple is available here.
2685 : : * This is needed in case the EPQ state is re-used to test a tuple for a
2686 : : * different target relation.
2687 : : */
2381 2688 : 132 : ExecClearTuple(testslot);
841 tgl@sss.pgh.pa.us 2689 : 132 : epqstate->relsubs_blocked[rti - 1] = true;
2690 : :
5808 2691 : 132 : return slot;
2692 : : }
2693 : :
2694 : : /*
2695 : : * EvalPlanQualInit -- initialize during creation of a plan state node
2696 : : * that might need to invoke EPQ processing.
2697 : : *
2698 : : * If the caller intends to use EvalPlanQual(), resultRelations should be
2699 : : * a list of RT indexes of potential target relations for EvalPlanQual(),
2700 : : * and we will arrange that the other listed relations don't return any
2701 : : * tuple during an EvalPlanQual() call. Otherwise resultRelations
2702 : : * should be NIL.
2703 : : *
2704 : : * Note: subplan/auxrowmarks can be NULL/NIL if they will be set later
2705 : : * with EvalPlanQualSetPlan.
2706 : : */
2707 : : void
2193 andres@anarazel.de 2708 : 131911 : EvalPlanQualInit(EPQState *epqstate, EState *parentestate,
2709 : : Plan *subplan, List *auxrowmarks,
2710 : : int epqParam, List *resultRelations)
2711 : : {
2712 : 131911 : Index rtsize = parentestate->es_range_table_size;
2713 : :
2714 : : /* initialize data not changing over EPQState's lifetime */
2715 : 131911 : epqstate->parentestate = parentestate;
2716 : 131911 : epqstate->epqParam = epqParam;
841 tgl@sss.pgh.pa.us 2717 : 131911 : epqstate->resultRelations = resultRelations;
2718 : :
2719 : : /*
2720 : : * Allocate space to reference a slot for each potential rti - do so now
2721 : : * rather than in EvalPlanQualBegin(), as done for other dynamically
2722 : : * allocated resources, so EvalPlanQualSlot() can be used to hold tuples
2723 : : * that *may* need EPQ later, without forcing the overhead of
2724 : : * EvalPlanQualBegin().
2725 : : */
2193 andres@anarazel.de 2726 : 131911 : epqstate->tuple_table = NIL;
2727 : 131911 : epqstate->relsubs_slot = (TupleTableSlot **)
2728 : 131911 : palloc0(rtsize * sizeof(TupleTableSlot *));
2729 : :
2730 : : /* ... and remember data that EvalPlanQualBegin will need */
5794 tgl@sss.pgh.pa.us 2731 : 131911 : epqstate->plan = subplan;
5351 2732 : 131911 : epqstate->arowMarks = auxrowmarks;
2733 : :
2734 : : /* ... and mark the EPQ state inactive */
2193 andres@anarazel.de 2735 : 131911 : epqstate->origslot = NULL;
2736 : 131911 : epqstate->recheckestate = NULL;
2737 : 131911 : epqstate->recheckplanstate = NULL;
2738 : 131911 : epqstate->relsubs_rowmark = NULL;
2739 : 131911 : epqstate->relsubs_done = NULL;
841 tgl@sss.pgh.pa.us 2740 : 131911 : epqstate->relsubs_blocked = NULL;
5794 2741 : 131911 : }
2742 : :
2743 : : /*
2744 : : * EvalPlanQualSetPlan -- set or change subplan of an EPQState.
2745 : : *
2746 : : * We used to need this so that ModifyTable could deal with multiple subplans.
2747 : : * It could now be refactored out of existence.
2748 : : */
2749 : : void
5351 2750 : 55392 : EvalPlanQualSetPlan(EPQState *epqstate, Plan *subplan, List *auxrowmarks)
2751 : : {
2752 : : /* If we have a live EPQ query, shut it down */
5794 2753 : 55392 : EvalPlanQualEnd(epqstate);
2754 : : /* And set/change the plan pointer */
2755 : 55392 : epqstate->plan = subplan;
2756 : : /* The rowmarks depend on the plan, too */
5351 2757 : 55392 : epqstate->arowMarks = auxrowmarks;
5794 2758 : 55392 : }
2759 : :
2760 : : /*
2761 : : * Return, and create if necessary, a slot for an EPQ test tuple.
2762 : : *
2763 : : * Note this only requires EvalPlanQualInit() to have been called,
2764 : : * EvalPlanQualBegin() is not necessary.
2765 : : */
2766 : : TupleTableSlot *
2381 andres@anarazel.de 2767 : 8747 : EvalPlanQualSlot(EPQState *epqstate,
2768 : : Relation relation, Index rti)
2769 : : {
2770 : : TupleTableSlot **slot;
2771 : :
2193 2772 [ - + ]: 8747 : Assert(relation);
2773 [ + - - + ]: 8747 : Assert(rti > 0 && rti <= epqstate->parentestate->es_range_table_size);
2774 : 8747 : slot = &epqstate->relsubs_slot[rti - 1];
2775 : :
2381 2776 [ + + ]: 8747 : if (*slot == NULL)
2777 : : {
2778 : : MemoryContext oldcontext;
2779 : :
2193 2780 : 2997 : oldcontext = MemoryContextSwitchTo(epqstate->parentestate->es_query_cxt);
2781 : 2997 : *slot = table_slot_create(relation, &epqstate->tuple_table);
2381 2782 : 2997 : MemoryContextSwitchTo(oldcontext);
2783 : : }
2784 : :
2785 : 8747 : return *slot;
2786 : : }
2787 : :
2788 : : /*
2789 : : * Fetch the current row value for a non-locked relation, identified by rti,
2790 : : * that needs to be scanned by an EvalPlanQual operation. origslot must have
2791 : : * been set to contain the current result row (top-level row) that we need to
2792 : : * recheck. Returns true if a substitution tuple was found, false if not.
2793 : : */
2794 : : bool
2193 2795 : 13 : EvalPlanQualFetchRowMark(EPQState *epqstate, Index rti, TupleTableSlot *slot)
2796 : : {
2797 : 13 : ExecAuxRowMark *earm = epqstate->relsubs_rowmark[rti - 1];
2798 : : ExecRowMark *erm;
2799 : : Datum datum;
2800 : : bool isNull;
2801 : :
2802 [ - + ]: 13 : Assert(earm != NULL);
5794 tgl@sss.pgh.pa.us 2803 [ - + ]: 13 : Assert(epqstate->origslot != NULL);
2804 : :
204 dgustafsson@postgres 2805 : 13 : erm = earm->rowmark;
2806 : :
2193 andres@anarazel.de 2807 [ - + ]: 13 : if (RowMarkRequiresRowShareLock(erm->markType))
2193 andres@anarazel.de 2808 [ # # ]:UBC 0 : elog(ERROR, "EvalPlanQual doesn't support locking rowmarks");
2809 : :
2810 : : /* if child rel, must check whether it produced this row */
2193 andres@anarazel.de 2811 [ - + ]:CBC 13 : if (erm->rti != erm->prti)
2812 : : {
2813 : : Oid tableoid;
2814 : :
2193 andres@anarazel.de 2815 :UBC 0 : datum = ExecGetJunkAttribute(epqstate->origslot,
2816 : 0 : earm->toidAttNo,
2817 : : &isNull);
2818 : : /* non-locked rels could be on the inside of outer joins */
2819 [ # # ]: 0 : if (isNull)
2820 : 0 : return false;
2821 : :
2822 : 0 : tableoid = DatumGetObjectId(datum);
2823 : :
2824 [ # # ]: 0 : Assert(OidIsValid(erm->relid));
2825 [ # # ]: 0 : if (tableoid != erm->relid)
2826 : : {
2827 : : /* this child is inactive right now */
2828 : 0 : return false;
2829 : : }
2830 : : }
2831 : :
2193 andres@anarazel.de 2832 [ + - ]:CBC 13 : if (erm->markType == ROW_MARK_REFERENCE)
2833 : : {
2834 [ - + ]: 13 : Assert(erm->relation != NULL);
2835 : :
2836 : : /* fetch the tuple's ctid */
2837 : 13 : datum = ExecGetJunkAttribute(epqstate->origslot,
2838 : 13 : earm->ctidAttNo,
2839 : : &isNull);
2840 : : /* non-locked rels could be on the inside of outer joins */
2841 [ - + ]: 13 : if (isNull)
2193 andres@anarazel.de 2842 :UBC 0 : return false;
2843 : :
2844 : : /* fetch requests on foreign tables must be passed to their FDW */
2193 andres@anarazel.de 2845 [ - + ]:CBC 13 : if (erm->relation->rd_rel->relkind == RELKIND_FOREIGN_TABLE)
2846 : : {
2847 : : FdwRoutine *fdwroutine;
2193 andres@anarazel.de 2848 :UBC 0 : bool updated = false;
2849 : :
2850 : 0 : fdwroutine = GetFdwRoutineForRelation(erm->relation, false);
2851 : : /* this should have been checked already, but let's be safe */
2852 [ # # ]: 0 : if (fdwroutine->RefetchForeignRow == NULL)
2853 [ # # ]: 0 : ereport(ERROR,
2854 : : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
2855 : : errmsg("cannot lock rows in foreign table \"%s\"",
2856 : : RelationGetRelationName(erm->relation))));
2857 : :
2858 : 0 : fdwroutine->RefetchForeignRow(epqstate->recheckestate,
2859 : : erm,
2860 : : datum,
2861 : : slot,
2862 : : &updated);
2863 [ # # # # ]: 0 : if (TupIsNull(slot))
2864 [ # # ]: 0 : elog(ERROR, "failed to fetch tuple for EvalPlanQual recheck");
2865 : :
2866 : : /*
2867 : : * Ideally we'd insist on updated == false here, but that assumes
2868 : : * that FDWs can track that exactly, which they might not be able
2869 : : * to. So just ignore the flag.
2870 : : */
2871 : 0 : return true;
2872 : : }
2873 : : else
2874 : : {
2875 : : /* ordinary table, fetch the tuple */
2193 andres@anarazel.de 2876 [ - + ]:CBC 13 : if (!table_tuple_fetch_row_version(erm->relation,
2877 : 13 : (ItemPointer) DatumGetPointer(datum),
2878 : : SnapshotAny, slot))
2193 andres@anarazel.de 2879 [ # # ]:UBC 0 : elog(ERROR, "failed to fetch tuple for EvalPlanQual recheck");
2193 andres@anarazel.de 2880 :CBC 13 : return true;
2881 : : }
2882 : : }
2883 : : else
2884 : : {
2193 andres@anarazel.de 2885 [ # # ]:UBC 0 : Assert(erm->markType == ROW_MARK_COPY);
2886 : :
2887 : : /* fetch the whole-row Var for the relation */
2888 : 0 : datum = ExecGetJunkAttribute(epqstate->origslot,
2889 : 0 : earm->wholeAttNo,
2890 : : &isNull);
2891 : : /* non-locked rels could be on the inside of outer joins */
2892 [ # # ]: 0 : if (isNull)
2893 : 0 : return false;
2894 : :
2895 : 0 : ExecStoreHeapTupleDatum(datum, slot);
2896 : 0 : return true;
2897 : : }
2898 : : }
2899 : :
2900 : : /*
2901 : : * Fetch the next row (if any) from EvalPlanQual testing
2902 : : *
2903 : : * (In practice, there should never be more than one row...)
2904 : : */
2905 : : TupleTableSlot *
5794 tgl@sss.pgh.pa.us 2906 :CBC 160 : EvalPlanQualNext(EPQState *epqstate)
2907 : : {
2908 : : MemoryContext oldcontext;
2909 : : TupleTableSlot *slot;
2910 : :
2193 andres@anarazel.de 2911 : 160 : oldcontext = MemoryContextSwitchTo(epqstate->recheckestate->es_query_cxt);
2912 : 160 : slot = ExecProcNode(epqstate->recheckplanstate);
8298 tgl@sss.pgh.pa.us 2913 : 160 : MemoryContextSwitchTo(oldcontext);
2914 : :
5808 2915 : 160 : return slot;
2916 : : }
2917 : :
2918 : : /*
2919 : : * Initialize or reset an EvalPlanQual state tree
2920 : : */
2921 : : void
2193 andres@anarazel.de 2922 : 191 : EvalPlanQualBegin(EPQState *epqstate)
2923 : : {
2924 : 191 : EState *parentestate = epqstate->parentestate;
2925 : 191 : EState *recheckestate = epqstate->recheckestate;
2926 : :
2927 [ + + ]: 191 : if (recheckestate == NULL)
2928 : : {
2929 : : /* First time through, so create a child EState */
2930 : 117 : EvalPlanQualStart(epqstate, epqstate->plan);
2931 : : }
2932 : : else
2933 : : {
2934 : : /*
2935 : : * We already have a suitable child EPQ tree, so just reset it.
2936 : : */
2529 tgl@sss.pgh.pa.us 2937 : 74 : Index rtsize = parentestate->es_range_table_size;
2193 andres@anarazel.de 2938 : 74 : PlanState *rcplanstate = epqstate->recheckplanstate;
2939 : :
2940 : : /*
2941 : : * Reset the relsubs_done[] flags to equal relsubs_blocked[], so that
2942 : : * the EPQ run will never attempt to fetch tuples from blocked target
2943 : : * relations.
2944 : : */
841 tgl@sss.pgh.pa.us 2945 : 74 : memcpy(epqstate->relsubs_done, epqstate->relsubs_blocked,
2946 : : rtsize * sizeof(bool));
2947 : :
2948 : : /* Recopy current values of parent parameters */
2854 rhaas@postgresql.org 2949 [ + - ]: 74 : if (parentestate->es_plannedstmt->paramExecTypes != NIL)
2950 : : {
2951 : : int i;
2952 : :
2953 : : /*
2954 : : * Force evaluation of any InitPlan outputs that could be needed
2955 : : * by the subplan, just in case they got reset since
2956 : : * EvalPlanQualStart (see comments therein).
2957 : : */
2193 andres@anarazel.de 2958 : 74 : ExecSetParamPlanMulti(rcplanstate->plan->extParam,
2548 tgl@sss.pgh.pa.us 2959 [ + - ]: 74 : GetPerTupleExprContext(parentestate));
2960 : :
2854 rhaas@postgresql.org 2961 : 74 : i = list_length(parentestate->es_plannedstmt->paramExecTypes);
2962 : :
5794 tgl@sss.pgh.pa.us 2963 [ + + ]: 157 : while (--i >= 0)
2964 : : {
2965 : : /* copy value if any, but not execPlan link */
2193 andres@anarazel.de 2966 : 83 : recheckestate->es_param_exec_vals[i].value =
5794 tgl@sss.pgh.pa.us 2967 : 83 : parentestate->es_param_exec_vals[i].value;
2193 andres@anarazel.de 2968 : 83 : recheckestate->es_param_exec_vals[i].isnull =
5794 tgl@sss.pgh.pa.us 2969 : 83 : parentestate->es_param_exec_vals[i].isnull;
2970 : : }
2971 : : }
2972 : :
2973 : : /*
2974 : : * Mark child plan tree as needing rescan at all scan nodes. The
2975 : : * first ExecProcNode will take care of actually doing the rescan.
2976 : : */
2193 andres@anarazel.de 2977 : 74 : rcplanstate->chgParam = bms_add_member(rcplanstate->chgParam,
2978 : : epqstate->epqParam);
2979 : : }
8298 tgl@sss.pgh.pa.us 2980 : 191 : }
2981 : :
2982 : : /*
2983 : : * Start execution of an EvalPlanQual plan tree.
2984 : : *
2985 : : * This is a cut-down version of ExecutorStart(): we copy some state from
2986 : : * the top-level estate rather than initializing it fresh.
2987 : : */
2988 : : static void
2193 andres@anarazel.de 2989 : 117 : EvalPlanQualStart(EPQState *epqstate, Plan *planTree)
2990 : : {
2991 : 117 : EState *parentestate = epqstate->parentestate;
2992 : 117 : Index rtsize = parentestate->es_range_table_size;
2993 : : EState *rcestate;
2994 : : MemoryContext oldcontext;
2995 : : ListCell *l;
2996 : :
2997 : 117 : epqstate->recheckestate = rcestate = CreateExecutorState();
2998 : :
2999 : 117 : oldcontext = MemoryContextSwitchTo(rcestate->es_query_cxt);
3000 : :
3001 : : /* signal that this is an EState for executing EPQ */
3002 : 117 : rcestate->es_epq_active = epqstate;
3003 : :
3004 : : /*
3005 : : * Child EPQ EStates share the parent's copy of unchanging state such as
3006 : : * the snapshot, rangetable, and external Param info. They need their own
3007 : : * copies of local state, including a tuple table, es_param_exec_vals,
3008 : : * result-rel info, etc.
3009 : : */
3010 : 117 : rcestate->es_direction = ForwardScanDirection;
3011 : 117 : rcestate->es_snapshot = parentestate->es_snapshot;
3012 : 117 : rcestate->es_crosscheck_snapshot = parentestate->es_crosscheck_snapshot;
3013 : 117 : rcestate->es_range_table = parentestate->es_range_table;
3014 : 117 : rcestate->es_range_table_size = parentestate->es_range_table_size;
3015 : 117 : rcestate->es_relations = parentestate->es_relations;
3016 : 117 : rcestate->es_rowmarks = parentestate->es_rowmarks;
915 tgl@sss.pgh.pa.us 3017 : 117 : rcestate->es_rteperminfos = parentestate->es_rteperminfos;
2193 andres@anarazel.de 3018 : 117 : rcestate->es_plannedstmt = parentestate->es_plannedstmt;
3019 : 117 : rcestate->es_junkFilter = parentestate->es_junkFilter;
3020 : 117 : rcestate->es_output_cid = parentestate->es_output_cid;
915 tgl@sss.pgh.pa.us 3021 : 117 : rcestate->es_queryEnv = parentestate->es_queryEnv;
3022 : :
3023 : : /*
3024 : : * ResultRelInfos needed by subplans are initialized from scratch when the
3025 : : * subplans themselves are initialized.
3026 : : */
1779 heikki.linnakangas@i 3027 : 117 : rcestate->es_result_relations = NULL;
3028 : : /* es_trig_target_relations must NOT be copied */
2193 andres@anarazel.de 3029 : 117 : rcestate->es_top_eflags = parentestate->es_top_eflags;
3030 : 117 : rcestate->es_instrument = parentestate->es_instrument;
3031 : : /* es_auxmodifytables must NOT be copied */
3032 : :
3033 : : /*
3034 : : * The external param list is simply shared from parent. The internal
3035 : : * param workspace has to be local state, but we copy the initial values
3036 : : * from the parent, so as to have access to any param values that were
3037 : : * already set from other parts of the parent's plan tree.
3038 : : */
3039 : 117 : rcestate->es_param_list_info = parentestate->es_param_list_info;
2854 rhaas@postgresql.org 3040 [ + - ]: 117 : if (parentestate->es_plannedstmt->paramExecTypes != NIL)
3041 : : {
3042 : : int i;
3043 : :
3044 : : /*
3045 : : * Force evaluation of any InitPlan outputs that could be needed by
3046 : : * the subplan. (With more complexity, maybe we could postpone this
3047 : : * till the subplan actually demands them, but it doesn't seem worth
3048 : : * the trouble; this is a corner case already, since usually the
3049 : : * InitPlans would have been evaluated before reaching EvalPlanQual.)
3050 : : *
3051 : : * This will not touch output params of InitPlans that occur somewhere
3052 : : * within the subplan tree, only those that are attached to the
3053 : : * ModifyTable node or above it and are referenced within the subplan.
3054 : : * That's OK though, because the planner would only attach such
3055 : : * InitPlans to a lower-level SubqueryScan node, and EPQ execution
3056 : : * will not descend into a SubqueryScan.
3057 : : *
3058 : : * The EState's per-output-tuple econtext is sufficiently short-lived
3059 : : * for this, since it should get reset before there is any chance of
3060 : : * doing EvalPlanQual again.
3061 : : */
2548 tgl@sss.pgh.pa.us 3062 : 117 : ExecSetParamPlanMulti(planTree->extParam,
3063 [ + + ]: 117 : GetPerTupleExprContext(parentestate));
3064 : :
3065 : : /* now make the internal param workspace ... */
2854 rhaas@postgresql.org 3066 : 117 : i = list_length(parentestate->es_plannedstmt->paramExecTypes);
2193 andres@anarazel.de 3067 : 117 : rcestate->es_param_exec_vals = (ParamExecData *)
5794 tgl@sss.pgh.pa.us 3068 : 117 : palloc0(i * sizeof(ParamExecData));
3069 : : /* ... and copy down all values, whether really needed or not */
3070 [ + + ]: 285 : while (--i >= 0)
3071 : : {
3072 : : /* copy value if any, but not execPlan link */
2193 andres@anarazel.de 3073 : 168 : rcestate->es_param_exec_vals[i].value =
5794 tgl@sss.pgh.pa.us 3074 : 168 : parentestate->es_param_exec_vals[i].value;
2193 andres@anarazel.de 3075 : 168 : rcestate->es_param_exec_vals[i].isnull =
5794 tgl@sss.pgh.pa.us 3076 : 168 : parentestate->es_param_exec_vals[i].isnull;
3077 : : }
3078 : : }
3079 : :
3080 : : /*
3081 : : * Copy es_unpruned_relids so that pruned relations are ignored by
3082 : : * ExecInitLockRows() and ExecInitModifyTable() when initializing the plan
3083 : : * trees below.
3084 : : */
211 amitlan@postgresql.o 3085 : 117 : rcestate->es_unpruned_relids = parentestate->es_unpruned_relids;
3086 : :
3087 : : /*
3088 : : * Initialize private state information for each SubPlan. We must do this
3089 : : * before running ExecInitNode on the main query tree, since
3090 : : * ExecInitSubPlan expects to be able to find these entries. Some of the
3091 : : * SubPlans might not be used in the part of the plan tree we intend to
3092 : : * run, but since it's not easy to tell which, we just initialize them
3093 : : * all.
3094 : : */
2193 andres@anarazel.de 3095 [ - + ]: 117 : Assert(rcestate->es_subplanstates == NIL);
5794 tgl@sss.pgh.pa.us 3096 [ + + + + : 147 : foreach(l, parentestate->es_plannedstmt->subplans)
+ + ]
3097 : : {
6505 bruce@momjian.us 3098 : 30 : Plan *subplan = (Plan *) lfirst(l);
3099 : : PlanState *subplanstate;
3100 : :
2193 andres@anarazel.de 3101 : 30 : subplanstate = ExecInitNode(subplan, rcestate, 0);
3102 : 30 : rcestate->es_subplanstates = lappend(rcestate->es_subplanstates,
3103 : : subplanstate);
3104 : : }
3105 : :
3106 : : /*
3107 : : * Build an RTI indexed array of rowmarks, so that
3108 : : * EvalPlanQualFetchRowMark() can efficiently access the to be fetched
3109 : : * rowmark.
3110 : : */
2048 tgl@sss.pgh.pa.us 3111 : 117 : epqstate->relsubs_rowmark = (ExecAuxRowMark **)
3112 : 117 : palloc0(rtsize * sizeof(ExecAuxRowMark *));
2193 andres@anarazel.de 3113 [ + + + + : 123 : foreach(l, epqstate->arowMarks)
+ + ]
3114 : : {
3115 : 6 : ExecAuxRowMark *earm = (ExecAuxRowMark *) lfirst(l);
3116 : :
3117 : 6 : epqstate->relsubs_rowmark[earm->rowmark->rti - 1] = earm;
3118 : : }
3119 : :
3120 : : /*
3121 : : * Initialize per-relation EPQ tuple states. Result relations, if any,
3122 : : * get marked as blocked; others as not-fetched.
3123 : : */
841 tgl@sss.pgh.pa.us 3124 : 117 : epqstate->relsubs_done = palloc_array(bool, rtsize);
3125 : 117 : epqstate->relsubs_blocked = palloc0_array(bool, rtsize);
3126 : :
3127 [ + + + + : 237 : foreach(l, epqstate->resultRelations)
+ + ]
3128 : : {
3129 : 120 : int rtindex = lfirst_int(l);
3130 : :
3131 [ + - - + ]: 120 : Assert(rtindex > 0 && rtindex <= rtsize);
3132 : 120 : epqstate->relsubs_blocked[rtindex - 1] = true;
3133 : : }
3134 : :
3135 : 117 : memcpy(epqstate->relsubs_done, epqstate->relsubs_blocked,
3136 : : rtsize * sizeof(bool));
3137 : :
3138 : : /*
3139 : : * Initialize the private state information for all the nodes in the part
3140 : : * of the plan tree we need to run. This opens files, allocates storage
3141 : : * and leaves us ready to start processing tuples.
3142 : : */
2193 andres@anarazel.de 3143 : 117 : epqstate->recheckplanstate = ExecInitNode(planTree, rcestate, 0);
3144 : :
8298 tgl@sss.pgh.pa.us 3145 : 117 : MemoryContextSwitchTo(oldcontext);
3146 : 117 : }
3147 : :
3148 : : /*
3149 : : * EvalPlanQualEnd -- shut down at termination of parent plan state node,
3150 : : * or if we are done with the current EPQ child.
3151 : : *
3152 : : * This is a cut-down version of ExecutorEnd(); basically we want to do most
3153 : : * of the normal cleanup, but *not* close result relations (which we are
3154 : : * just sharing from the outer query). We do, however, have to close any
3155 : : * result and trigger target relations that got opened, since those are not
3156 : : * shared. (There probably shouldn't be any of the latter, but just in
3157 : : * case...)
3158 : : */
3159 : : void
5794 3160 : 186513 : EvalPlanQualEnd(EPQState *epqstate)
3161 : : {
2193 andres@anarazel.de 3162 : 186513 : EState *estate = epqstate->recheckestate;
3163 : : Index rtsize;
3164 : : MemoryContext oldcontext;
3165 : : ListCell *l;
3166 : :
3167 : 186513 : rtsize = epqstate->parentestate->es_range_table_size;
3168 : :
3169 : : /*
3170 : : * We may have a tuple table, even if EPQ wasn't started, because we allow
3171 : : * use of EvalPlanQualSlot() without calling EvalPlanQualBegin().
3172 : : */
3173 [ + + ]: 186513 : if (epqstate->tuple_table != NIL)
3174 : : {
3175 : 2868 : memset(epqstate->relsubs_slot, 0,
3176 : : rtsize * sizeof(TupleTableSlot *));
3177 : 2868 : ExecResetTupleTable(epqstate->tuple_table, true);
3178 : 2868 : epqstate->tuple_table = NIL;
3179 : : }
3180 : :
3181 : : /* EPQ wasn't started, nothing further to do */
5794 tgl@sss.pgh.pa.us 3182 [ + + ]: 186513 : if (estate == NULL)
2193 andres@anarazel.de 3183 : 186404 : return;
3184 : :
5794 tgl@sss.pgh.pa.us 3185 : 109 : oldcontext = MemoryContextSwitchTo(estate->es_query_cxt);
3186 : :
2193 andres@anarazel.de 3187 : 109 : ExecEndNode(epqstate->recheckplanstate);
3188 : :
5794 tgl@sss.pgh.pa.us 3189 [ + + + + : 136 : foreach(l, estate->es_subplanstates)
+ + ]
3190 : : {
6505 bruce@momjian.us 3191 : 27 : PlanState *subplanstate = (PlanState *) lfirst(l);
3192 : :
6766 tgl@sss.pgh.pa.us 3193 : 27 : ExecEndNode(subplanstate);
3194 : : }
3195 : :
3196 : : /* throw away the per-estate tuple table, some node may have used it */
5794 3197 : 109 : ExecResetTupleTable(estate->es_tupleTable, false);
3198 : :
3199 : : /* Close any result and trigger target relations attached to this EState */
1789 heikki.linnakangas@i 3200 : 109 : ExecCloseResultRelations(estate);
3201 : :
8298 tgl@sss.pgh.pa.us 3202 : 109 : MemoryContextSwitchTo(oldcontext);
3203 : :
5794 3204 : 109 : FreeExecutorState(estate);
3205 : :
3206 : : /* Mark EPQState idle */
2048 3207 : 109 : epqstate->origslot = NULL;
2193 andres@anarazel.de 3208 : 109 : epqstate->recheckestate = NULL;
3209 : 109 : epqstate->recheckplanstate = NULL;
2048 tgl@sss.pgh.pa.us 3210 : 109 : epqstate->relsubs_rowmark = NULL;
3211 : 109 : epqstate->relsubs_done = NULL;
841 3212 : 109 : epqstate->relsubs_blocked = NULL;
3213 : : }
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