pgsql: Make non-MVCC snapshots exempt from predicate locking. Scans wit - Mailing list pgsql-committers

Make non-MVCC snapshots exempt from predicate locking. Scans with non-MVCC
snapshots, like in REINDEX, are basically non-transactional operations. The
DDL operation itself might participate in SSI, but there's separate
functions for that.

Kevin Grittner and Dan Ports, with some changes by me.

Branch
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REL9_1_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/ff4e078773b48260a36587b54537ca54d929898f

Modified Files
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src/backend/access/heap/heapam.c      |   23 +++--
src/backend/access/index/indexam.c    |   15 ++--
src/backend/access/nbtree/nbtsearch.c |   33 +++----
src/backend/executor/nodeSeqscan.c    |    3 +-
src/backend/storage/lmgr/predicate.c  |  168 +++++++++++++++++++++------------
src/include/storage/predicate.h       |    9 +-
6 files changed, 151 insertions(+), 100 deletions(-)