diff options
Diffstat (limited to 'src/backend/commands/trigger.c')
| -rw-r--r-- | src/backend/commands/trigger.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/src/backend/commands/trigger.c b/src/backend/commands/trigger.c index 1fa63ab7d0f..711c09a1030 100644 --- a/src/backend/commands/trigger.c +++ b/src/backend/commands/trigger.c @@ -4104,11 +4104,12 @@ afterTriggerAddEvent(AfterTriggerEventList *events, /* * Try to locate a matching shared-data record already in the chunk. If - * none, make a new one. + * none, make a new one. The search begins with the most recently added + * record, since newer ones are most likely to match. */ - for (newshared = ((AfterTriggerShared) chunk->endptr) - 1; - (char *) newshared >= chunk->endfree; - newshared--) + for (newshared = (AfterTriggerShared) chunk->endfree; + (char *) newshared < chunk->endptr; + newshared++) { /* compare fields roughly by probability of them being different */ if (newshared->ats_tgoid == evtshared->ats_tgoid && @@ -4120,8 +4121,9 @@ afterTriggerAddEvent(AfterTriggerEventList *events, evtshared->ats_modifiedcols)) break; } - if ((char *) newshared < chunk->endfree) + if ((char *) newshared >= chunk->endptr) { + newshared = ((AfterTriggerShared) chunk->endfree) - 1; *newshared = *evtshared; /* now we must make a suitably-long-lived copy of the bitmap */ newshared->ats_modifiedcols = afterTriggerCopyBitmap(evtshared->ats_modifiedcols); |