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Improve FK trigger parallel-safety check added by 05c8482f7f.

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Commit 05c8482f7f added special logic related to parallel-safety of FK
triggers. This is a bit of a hack and should have instead been done by
simply setting appropriate proparallel values on those trigger functions
themselves.

Suggested-by: Tom Lane
Author: Greg Nancarrow
Reviewed-by: Amit Kapila
Discussion: https://postgr.es/m/2309260.1615485644@sss.pgh.pa.us
This commit is contained in:
Amit Kapila 2021-03-13 09:13:21 +05:30
parent b9164eab20
commit c5be48f092
3 changed files with 5 additions and 19 deletions
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14
src/backend/optimizer/util/clauses.c
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@ -971,24 +971,10 @@ target_rel_trigger_max_parallel_hazard(Relation rel,
*/
for (i = 0; i < rel->trigdesc->numtriggers; i++)
{
int trigtype;
Oid tgfoid = rel->trigdesc->triggers[i].tgfoid;
if (max_parallel_hazard_test(func_parallel(tgfoid), context))
return true;
/*
* If the trigger type is RI_TRIGGER_FK, this indicates a FK exists in
* the relation, and this would result in creation of new CommandIds
* on insert/update and this isn't supported in a parallel worker (but
* is safe in the parallel leader).
*/
trigtype = RI_FKey_trigger_type(tgfoid);
if (trigtype == RI_TRIGGER_FK)
{
if (max_parallel_hazard_test(PROPARALLEL_RESTRICTED, context))
return true;
}
}
return false;

2
src/include/catalog/catversion.h
View File

@ -53,6 +53,6 @@
*/
/* yyyymmddN */
#define CATALOG_VERSION_NO 202103093
#define CATALOG_VERSION_NO 202103131
#endif

8
src/include/catalog/pg_proc.dat
View File

@ -3745,11 +3745,11 @@
# Generic referential integrity constraint triggers
{ oid => '1644', descr => 'referential integrity FOREIGN KEY ... REFERENCES',
proname => 'RI_FKey_check_ins', provolatile => 'v', prorettype => 'trigger',
proargtypes => '', prosrc => 'RI_FKey_check_ins' },
proname => 'RI_FKey_check_ins', provolatile => 'v', proparallel => 'r',
prorettype => 'trigger', proargtypes => '', prosrc => 'RI_FKey_check_ins' },
{ oid => '1645', descr => 'referential integrity FOREIGN KEY ... REFERENCES',
proname => 'RI_FKey_check_upd', provolatile => 'v', prorettype => 'trigger',
proargtypes => '', prosrc => 'RI_FKey_check_upd' },
proname => 'RI_FKey_check_upd', provolatile => 'v', proparallel => 'r',
prorettype => 'trigger', proargtypes => '', prosrc => 'RI_FKey_check_upd' },
{ oid => '1646', descr => 'referential integrity ON DELETE CASCADE',
proname => 'RI_FKey_cascade_del', provolatile => 'v', prorettype => 'trigger',
proargtypes => '', prosrc => 'RI_FKey_cascade_del' },