pgsql: Update pg_stat_statements extension for parallel query.

Update pg_stat_statements extension for parallel query.

All functions provided by this extension are PARALLEL SAFE.  Given the
general prohibition against write operations in parallel queries, it is
perhaps a bit surprising that pg_stat_statements_reset() is parallel safe.
But since it only modifies shared memory, not the database, it's OK.

Andreas Karlsson

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/496899ccc2fd1b84bd1a8c8b3a7f0c667e5329f0

Modified Files
--------------
contrib/pg_stat_statements/Makefile                |  6 +--
.../pg_stat_statements--1.3--1.4.sql               |  7 ++++
.../pg_stat_statements/pg_stat_statements--1.3.sql | 48 ----------------------
.../pg_stat_statements/pg_stat_statements--1.4.sql | 48 ++++++++++++++++++++++
.../pg_stat_statements/pg_stat_statements.control  |  2 +-
5 files changed, 59 insertions(+), 52 deletions(-)