am Thu, dem 18.01.2007, um 11:26:03 -0700 mailte Scott Ribe folgendes:
> Suppose that I have a varchar column which contains dates, and some of them
> are bogus, such as '1968-02-31'. Is it possible to specify a query condition
> "cannot be cast to a valid date". (It's legacy data, and I'm trying to clean
> it up before importing into the final schema.) There probably aren't that
> many, and I can just keep hitting pg errors one row at a time until I work
> through this, but...
You can write a function for this, read this chapter in the docu about
trapping errors:
http://www.postgresql.org/docs/8.2/interactive/plpgsql-control-structures.html#PLPGSQL-ERROR-TRAPPING
Andreas
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Andreas Kretschmer
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