Re: problem porting MySQL SQL to Postgres

On Thu, Apr 15, 2004 at 11:25:59AM +0100, Dan Field wrote:
> I've stumbled across a query I don't quite understand the error message
> for.
>
> This query is pulled from a working MySQL setup:
>
> SELECT
> DEWEY_ID, DEWEY_HUNDREDS, DEWEY_TENS, DEWEY_ONES, DEWEY_POINT_ONES,
> DEWEY_POINT_TENS,
> DEWEY_POINT_HUNDREDS, DEWEY_POINT_THOUSANDS, DEWEY_TYPE,
> DEWEY_LANG, DEWEY_SUBJECT FROM lu_dewey
> WHERE
> (DEWEY_HUNDREDS = 9) AND
> (DEWEY_TENS >= 0) AND
> (DEWEY_TENS <= 9) AND
> (DEWEY_ONES = 0 || DEWEY_ONES = NULL) AND
> (DEWEY_POINT_ONES = 0 || DEWEY_POINT_ONES = NULL) AND
> (DEWEY_POINT_TENS = 0 || DEWEY_POINT_TENS = NULL) AND
> (DEWEY_POINT_HUNDREDS = 0 || DEWEY_POINT_HUNDREDS = NULL) AND
> (DEWEY_POINT_THOUSANDS = 0 || DEWEY_POINT_THOUSANDS = NULL) AND

please use 'IS NULL' instead of '= NULL'

> (DEWEY_TYPE = 't') AND
> (DEWEY_LANG = 'en')
> ORDER BY DEWEY_TENS
>
>
> However I'm getting the following error:
>
> ERROR: Unable to identify an operator '=' for types 'character' and
> 'boolean' You will have to retype this query using an explicit cast.

can you post the output of '\d lu_dewey'?

--
__________________________________________________
"Nothing is as subjective as reality"
Reinoud van Leeuwen reinoud(dot)v(at)n(dot)leeuwen(dot)net
http://www.xs4all.nl/~reinoud
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