Thread: CONSTRAINT name With Domain As Check
I define a table, Permits, that includes a column for type. Permit_Type is a domain with permissible names: CREATE DOMAIN Permit_Type as TEXT CHECK (value in ('Environmental', 'Health', 'Safety', 'Occupancy')); Can I name that domain check within the Permits table as follows? CREATE TABLE Permits ( ... type Permit_Type CONSTRAINT invalid_permit_type ... ); If not, does the constraint name belong in the domain definition? Rich -- Richard B. Shepard, Ph.D. | The Environmental Permitting Applied Ecosystem Services, Inc. | Accelerator(TM) <http://www.appl-ecosys.com> Voice: 503-667-4517 Fax: 503-667-8863
Rich Shepard <rshepard@appl-ecosys.com> writes: > I define a table, Permits, that includes a column for type. > Permit_Type is a domain with permissible names: > CREATE DOMAIN Permit_Type > as TEXT > CHECK (value in ('Environmental', 'Health', 'Safety', 'Occupancy')); > Can I name that domain check within the Permits table as follows? > CREATE TABLE Permits ( > ... > type Permit_Type > CONSTRAINT invalid_permit_type > ... > ); Um, what are you trying to do that's different from declaring a column of the table as being of type Permit_Type? regards, tom lane
On Sun, 29 Apr 2007, Tom Lane wrote: > Um, what are you trying to do that's different from declaring a column of > the table as being of type Permit_Type? Tom, Nothing. After further consideration I decided that the domain was unnecessary and the table column with a CHECK() constraint the more appropriate approach. Thanks, Rich -- Richard B. Shepard, Ph.D. | The Environmental Permitting Applied Ecosystem Services, Inc. | Accelerator(TM) <http://www.appl-ecosys.com> Voice: 503-667-4517 Fax: 503-667-8863