| From: | Simon Riggs <simon(at)2ndQuadrant(dot)com> |
|---|---|
| To: | PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | ALTER TABLE ... ALTER CONSTRAINT |
| Date: | 2013-06-08 20:45:24 |
| Message-ID: | CA+U5nML4d_HJfp2+hcbYQcGA_Y30nxt+Yu-44KVtQgcSJB09+w@mail.gmail.com |
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| Lists: | pgsql-hackers |
While fiddling with FK tuning, it was useful to be able to enable and
disable the DEFERRED mode of constraints.
That is not currently possible in SQL, so I wrote this patch. Without
this you have to drop and then re-add a constraint, which is
impractical for large tables.
e.g.
CREATE TABLE fktable (id integer, fk integer REFERENCES pktable (id));
ALTER TABLE foo
ALTER CONSTRAINT fktable_fk_fkey DEFERRED INITIALLY IMMEDIATE;
Includes docs and tests.
Currently works for FKs only. Potentially other constraints can be
supported in future.
--
Simon Riggs http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
| Attachment | Content-Type | Size |
|---|---|---|
| alter_table_alter_constraint.v1.sql | application/octet-stream | 11.3 KB |
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