Log Message:
-----------
Separate prepared statement and bind parameters with comma.
Fix printing of NULL bind parameters, use "NULL".
Modified Files:
--------------
pgsql/src/backend/tcop:
postgres.c (r1.501 -> r1.502)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/tcop/postgres.c.diff?r1=1.501&r2=1.502)