PostgreSQL Generate create Foreign keys from information_schema or pg_constraint
-
04-03-2021 - |
Pregunta
Recently on a testing infrastructure, to restore multiple tables (via copy
command) I dropped all the foreign keys.
I have restored this database schema dump into a different database before dropping the FK.
Is there any way that I can generate the create FK from information_schema
or pg_constraint
?
I tried to get it from a dump file, but the create table
statement itself having the FK (not an Alter table statement).
Any suggestions?
Solución
I think you are looking for pg_constraint_def
, like in the following example:
SELECT pg_get_constraintdef(oid)
FROM pg_constraint
WHERE conname = 'child_accountid_itemid_fkey';
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