I want to do that because, I have a partitioned table (big_table) and others (t1,t2,t3,t4) have foreign keys reference to big_table and i had many trobules at insert data, reading the doc:
"A serious limitation of the inheritance feature is that indexes (including unique constraints) and foreign key constraints only apply to single tables, not to their inheritance children. "
On Wed, Dec 21, 2016 at 4:58 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
Edmundo Robles <edmundo@sw-argos.com> writes: > i need disable inheritance from many tables in a query like > "delete from pg_inherits where inhparent=20473" instead alter table ... > but is safe? which is the risk for database if i delete it?
If you need to do it from many tables, you could write a script to generate the ALTER TABLE statements....
from pg_stat_user_tables psut, pg_class pc, pg_inherits pi
where pi.inhrelid = psut.relid
AND pi.inhparent = pc.oid
AND pi.inhparent = 20473;
I wouldn't manually hit the catalogs, but, this will write all of the ALTER TABLE statements that you need.
This seems really dangerous. You're certainly missing the pg_depend linkages, not to mention attribute inheritance counts in pg_attribute, and there may be other things I'm not remembering offhand.
Why can't you use the normal ALTER TABLE approach?
