[pgpool-committers: 1715] pgpool: Fix JDBC exception of prepared statement including now() in rep

[Yugo Nagata]

Fix JDBC exception of prepared statement including now() in replication mode

With JDBC, when a prepared statement is executed more than PreparedThreshold times,
the statement is named and Describe message is sent after Parse. With named statement,
pgpool rewrite now() to parameter at Parse in replication mode. Hence, rewritten query
has additonal parameter than original. However, ParameterDescription message sent to
frontend, which is response of Describe, should include OIDs of the same number os
original query's parameters. Otherwize, JDBC raises ArrayIndexoutOfBoundsException.

Branch
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V3_2_STABLE

Details
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http://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=9e47b14c9a42e319ab4a48e7c8b7afaf545eb15d

Modified Files
--------------
pool_process_query.c |    2 +
pool_proto_modules.c |  107 ++++++++++++++++++++++++++++++++++++++++++++++++++
pool_proto_modules.h |    3 ++
pool_query_context.c |    1 +
pool_query_context.h |    1 +
pool_timestamp.c     |   13 +++---
6 files changed, 122 insertions(+), 5 deletions(-)