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Rework handling of subtransactions in 2PC recovery

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The bug fixed by 0874d4f3e1
caused us to question and rework the handling of
subtransactions in 2PC during and at end of recovery.
Patch adds checks and tests to ensure no further bugs.

This effectively removes the temporary measure put in place
by 546c13e11b.

Author: Simon Riggs
Reviewed-by: Tom Lane, Michael Paquier
Discussion: http://postgr.es/m/CANP8+j+vvXmruL_i2buvdhMeVv5TQu0Hm2+C5N+kdVwHJuor8w@mail.gmail.com
This commit is contained in:
Simon Riggs
2017-04-27 14:41:22 +02:00
parent 0352c15e5a
commit 49e9281549
7 changed files with 56 additions and 55 deletions
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2
src/include/access/subtrans.h
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@@ -14,7 +14,7 @@
/* Number of SLRU buffers to use for subtrans */
#define NUM_SUBTRANS_BUFFERS 32
extern void SubTransSetParent(TransactionId xid, TransactionId parent, bool overwriteOK);
extern void SubTransSetParent(TransactionId xid, TransactionId parent);
extern TransactionId SubTransGetParent(TransactionId xid);
extern TransactionId SubTransGetTopmostTransaction(TransactionId xid);