Hi everyone,
Looks like "sql_inheritance" GUC is affecting partitioned tables:
explain (costs off) select * from test;
QUERY PLAN
------------------------------
Append
-> Seq Scan on test
-> Seq Scan on test_1
-> Seq Scan on test_2
-> Seq Scan on test_1_1
-> Seq Scan on test_1_2
-> Seq Scan on test_1_1_1
-> Seq Scan on test_1_2_1
(8 rows)
set sql_inheritance = off;
explain (costs off) select * from test;
QUERY PLAN
------------------
Seq Scan on test
(1 row)
I might be wrong, but IMO this should not happen. Queries involving update,
delete etc on partitioned tables are basically broken. Moreover, there's no
point in performing such operations on a parent table that's supposed to be
empty at all times.
I've come up with a patch which fixes this behavior for UPDATE, DELETE,
TRUNCATE and also in transformTableEntry(). It might be hacky, but it gives
an idea.
I didn't touch RenameConstraint() and renameatt() since this would break
ALTER TABLE ONLY command.
--
Dmitry Ivanov
Postgres Professional: http://www.postgrespro.com
Russian Postgres Company
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