Log Message: ----------- Repair two related errors in heap_lock_tuple: it was failing to recognize cases where we already hold the desired lock "indirectly", either via membership in a MultiXact or because the lock was originally taken by a different subtransaction of the current transaction. These cases must be accounted for to avoid needless deadlocks and/or inappropriate replacement of an exclusive lock with a shared lock. Per report from Clarence Gardner and subsequent investigation. Tags: ---- REL8_1_STABLE Modified Files: -------------- pgsql/src/backend/access/heap: heapam.c (r1.200.2.2 -> r1.200.2.3) (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/heap/heapam.c.diff?r1=1.200.2.2&r2=1.200.2.3) pgsql/src/backend/access/transam: multixact.c (r1.11.2.2 -> r1.11.2.3) (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/transam/multixact.c.diff?r1=1.11.2.2&r2=1.11.2.3) pgsql/src/backend/utils/time: tqual.c (r1.91.2.1 -> r1.91.2.2) (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/time/tqual.c.diff?r1=1.91.2.1&r2=1.91.2.2) pgsql/src/include/access: multixact.h (r1.7 -> r1.7.2.1) (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/access/multixact.h.diff?r1=1.7&r2=1.7.2.1)
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