From: | "Robert B(dot) Easter" <reaster(at)comptechnews(dot)com> |
---|---|
To: | pgsql-sql(at)postgresql(dot)org |
Subject: | ALTER TABLE ADD COLUMN syntax question. |
Date: | 2000-07-06 03:51:04 |
Message-ID: | 00070523563709.01354@comptechnews |
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Thread: | |
Lists: | pgsql-sql |
I used the command below to alter a table and it took with no problem, but the
REFERENCES appears to have been ignored since I can put invalid numbers into
last_post_id. Are there plans to add the ability to specify column
constrainsts with ALTER TABLE ADD COLUMN in the future? For now, I suppose I
can use ALTER TABLE ADD CONSTRAINT to make a table constraint for last_post_id.
I hope it will not make things too slow. Are table constraints slower than
column constraints?
ALTER TABLE topic ADD COLUMN last_post_id INTEGER REFERENCES post ON DELETE
SET NULL;
--
Robert
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