[pgpool-committers: 1708] 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_1_STABLE

Details
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http://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=620aa4fd43a97762098c5870d091429ef833d18d

Modified Files
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pool_proto_modules.c |  107 ++++++++++++++++++++++++++++++++++++++++++++++++++
pool_proto_modules.h |    3 ++
pool_query_context.c |    1 +
pool_query_context.h |    1 +
pool_timestamp.c     |   13 +++---
5 files changed, 120 insertions(+), 5 deletions(-)