try:
c = self.db.cursor()
- c.execute("DROP FUNCTION versioncmp(text, text);")
+ # The reason we try and check to see if it exists is that
+ # psycopg2 might leave the cursor invalid if the drop fails
+ c.execute("SELECT proname from pg_catalog.pg_proc WHERE proname = 'versioncmp'")
+ rows = c.fetchall()
+ if rows:
+ c.execute("DROP FUNCTION versioncmp(text, text);")
+ else:
+ print "function already does not exist"
+
c.execute("UPDATE config SET value = '3' WHERE name = 'db_revision'")
self.db.commit()
- except psycopg2.ProgrammingError, msg:
+ except psycopg2.ProgrammingError as msg:
self.db.rollback()
- raise DBUpdateError, "Unable to appy versioncmp removal, rollback issued. Error message : %s" % (str(msg))
+ raise DBUpdateError("Unable to appy versioncmp removal, rollback issued. Error message : %s" % (str(msg)))