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Add subtransaction handling for table synchronization workers.

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Since the old logic was completely unaware of subtransactions, a
change made in a subsequently-aborted subtransaction would still cause
workers to be stopped at toplevel transaction commit.  Fix that by
managing a stack of worker lists rather than just one.

Amit Khandekar and Robert Haas

Discussion: http://postgr.es/m/CAJ3gD9eaG_mWqiOTA2LfAug-VRNn1hrhf50Xi1YroxL37QkZNg@mail.gmail.com
This commit is contained in:
Robert Haas
2018-07-16 17:33:22 -04:00
parent f7cb2842bf
commit 32df1c9afa
4 changed files with 112 additions and 8 deletions
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2
src/backend/access/transam/xact.c
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@ -4637,6 +4637,7 @@ CommitSubTransaction(void)
AtEOSubXact_HashTables(true, s->nestingLevel);
AtEOSubXact_PgStat(true, s->nestingLevel);
AtSubCommit_Snapshot(s->nestingLevel);
AtEOSubXact_ApplyLauncher(true, s->nestingLevel);
/*
* We need to restore the upper transaction's read-only state, in case the
@ -4790,6 +4791,7 @@ AbortSubTransaction(void)
AtEOSubXact_HashTables(false, s->nestingLevel);
AtEOSubXact_PgStat(false, s->nestingLevel);
AtSubAbort_Snapshot(s->nestingLevel);
AtEOSubXact_ApplyLauncher(false, s->nestingLevel);
}
/*