| From: | "Guy Rouillier" <guyr(at)masergy(dot)com> |
|---|---|
| To: | <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: More PostgreSQL conversion fun |
| Date: | 2006-04-09 01:27:01 |
| Message-ID: | CC1CF380F4D70844B01D45982E671B230137A85C@mtxexch01.add0.masergy.com |
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| Thread: | |
| Lists: | pgsql-general |
Nick Wiltshire wrote:
> Hi all,
>
> I have a varchar field in a table which contains dates in yyyy-mm-dd
> format. The problem is that some have entered invalid dates like
> 1975-01-00 and I want to convert it to a date field to avoid this
> nonsense. Is there a way to test for failure of a type conversion and
> insert a NULL on failure?
>
Not the question you asked, but perhaps a suitable alternative: before
attempting to convert, scan all the rows in the table looking for any
contents of that column not fitting the format yyyy-mm-dd. Then you can
either fix them or null them out.
--
Guy Rouillier
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