| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Alvaro Herrera <alvherre(at)atentus(dot)com> |
| Cc: | Gregory Wood <gregw(at)com-stock(dot)com>, PostgreSQL-General <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: ALTER TABLE Column NOT NULL? |
| Date: | 2002-01-25 20:37:36 |
| Message-ID: | 5216.1011991056@sss.pgh.pa.us |
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| Lists: | pgsql-general |
Alvaro Herrera <alvherre(at)atentus(dot)com> writes:
> ALTER TABLE table-name ADD CONSTRAINT constraint-name CHECK (column
> NOTNULL);
> Note that there cannot be any NULL value in the column (BTW, this is a
> good candidate for better error reporting)
regression=# create table foo (f1 text);
CREATE
regression=# insert into foo values(null);
INSERT 1999760 1
regression=# alter table foo add constraint f1_not_null check (f1 notnull);
ERROR: AlterTableAddConstraint: rejected due to CHECK constraint f1_not_null
What's wrong with that?
regards, tom lane
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