Обсуждение: pgsql: Fix DROP OPERATOR FAMILY IF EXISTS.

Fix DROP OPERATOR FAMILY IF EXISTS.

Essentially, the "IF EXISTS" portion was being ignored, and an error
thrown anyway if the opfamily did not exist.

I broke this in commit fd1843ff8979c0461fb3f1a9eab61140c977e32d; so
backpatch to 9.1.X.

Report and diagnosis by KaiGai Kohei.

Branch
------
REL9_1_STABLE

Details
-------
http://git.postgresql.org/pg/commitdiff/5c5138f2f8c7770e05036f991e7d29b8060d5218

Modified Files
--------------
src/backend/commands/opclasscmds.c |    7 +++----
1 files changed, 3 insertions(+), 4 deletions(-)