Re: Simple PG Sql question (i hope)
От | Martijn van Oosterhout |
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Тема | Re: Simple PG Sql question (i hope) |
Дата | |
Msg-id | 20050808203232.GB25056@svana.org обсуждение исходный текст |
Ответ на | Re: Simple PG Sql question (i hope) (Tony Caduto <tony_caduto@amsoftwaredesign.com>) |
Ответы |
Re: Simple PG Sql question (i hope)
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Список | pgsql-general |
On Mon, Aug 08, 2005 at 03:05:13PM -0500, Tony Caduto wrote: > Hi, > I don't think I was clear enough. > > I know about using the AS keyword, that is not the problem. > The query in issue is: > > select true,78,'Here is a value' as stringfield, testname from tbltest > > Is returning the string as TYPE Unknown, not the column name. The > column name comes back as stringfield because of the AS keyword. What about the query: select 't','78','Here is a value' as stringfield, testname from tbltest This gives you three Unknown fields. PostgreSQL can't know that the first is to be a bool or that the second is to be an int until you actually give it a type. Usually via casting or by inserting into a table/ Single quotes denote an untyped constant, not a string. Hope this helps, -- Martijn van Oosterhout <kleptog@svana.org> http://svana.org/kleptog/ > Patent. n. Genius is 5% inspiration and 95% perspiration. A patent is a > tool for doing 5% of the work and then sitting around waiting for someone > else to do the other 95% so you can sue them.
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