Table definitions using CHECK and DEFAULT
I am adding PostgreSQL support to some software that I've been
developing and I've hit a few snags.
I've found that MySQL's "ENUM" can be emulated with PostgreSQL's
"CHECK". Unfortunately it appears that I cannot use both the DEFAULT
modifier and the check modifier at the same time.
This line:
address_type VARCHAR(30) DEFAULT 'unknown' NOT NULL CHECK(address_type
IN ("unknown", "forged", "proxy", "temporary", "permanent"))
gives the error:
psql:IRDB_POSTGRES:69: ERROR: Attribute 'unknown' not found
If I write the definition without DEFAULT it works fine, if I write it
without the CHECK statement it works fine too..
(I've also split up the column definition and the check definition, i.e.
address_type VARCHAR(30) DEFAULT 'unknown' NOT NULL,
CHECK(address_type IN ("unknown", "forged", "proxy", "temporary", "permanent"))
)
Is the SQL wrong? Is it just not possible to do this? Or is this a
possible bug?
Any help is appreciated!
--
Matthew Wirges
Developer::CERIAS Incident Response Database
https://cirdb.cerias.purdue.edu/
wirges@cerias.purdue.edu
On Sun, 4 Nov 2001, Matthew L. Wirges wrote:
This line:
address_type VARCHAR(30) DEFAULT 'unknown' NOT NULL CHECK(address_type
IN ("unknown", "forged", "proxy", "temporary", "permanent"))
gives the error:
psql:IRDB_POSTGRES:69: ERROR: Attribute 'unknown' not found
[snip]
Is the SQL wrong? Is it just not possible to do this? Or is this a
possible bug?
No, the problem is that you're specifying string constants with
double-quotes, not single-quotes. ;) Double-quotes are for identifiers,
not constants.
Change it to read like this, and you'll be set:
address_type VARCHAR(30)
DEFAULT 'unknown'
NOT NULL
CHECK(address_type IN
('unknown', 'forged', 'proxy', 'temporary', 'permanent'))
Regards,
Jw.
--
by way of pgsql-general@commandprompt.com
"Matthew L. Wirges" <wirges@cerias.purdue.edu> writes:
address_type VARCHAR(30) DEFAULT 'unknown' NOT NULL CHECK(address_type
IN ("unknown", "forged", "proxy", "temporary", "permanent"))
gives the error:
psql:IRDB_POSTGRES:69: ERROR: Attribute 'unknown' not found
You must use single quotes not double quotes for literal strings.
Double-quotes are for names that don't follow standard identifier
rules.
regards, tom lane