pgsql: Fix "pg_bench -C -M prepared".

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: pgsql-committers(at)postgresql(dot)org
Subject: pgsql: Fix "pg_bench -C -M prepared".
Date: 2016-03-17 03:18:38
Message-ID: E1agOSM-0002JU-5F@gemulon.postgresql.org
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Fix "pg_bench -C -M prepared".

This didn't work because when we dropped and re-established a database
connection, we did not bother to reset session-specific state such as
the statements-are-prepared flags.

The st->prepared[] array certainly needs to be flushed, and I cleared a
couple of other fields as well that couldn't possibly retain meaningful
state for a new connection.

In passing, fix some bogus comments and strange field order choices.

Per report from Robins Tharakan.

Branch
------
REL9_4_STABLE

Details
-------
http://git.postgresql.org/pg/commitdiff/23cb32660c841d21a376642e40d8cfbea6c5f010

Modified Files
--------------
contrib/pgbench/pgbench.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)

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