From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
---|---|
To: | Ralf Hasemann <rhasemann(at)mac(dot)com> |
Cc: | pgsql-novice(at)postgresql(dot)org |
Subject: | Re: PQfnumber and duplicate column names.... |
Date: | 2004-07-29 00:34:26 |
Message-ID: | 1361.1091061266@sss.pgh.pa.us |
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Lists: | pgsql-novice |
Ralf Hasemann <rhasemann(at)mac(dot)com> writes:
> What happens if the statement looks like:
> select 1 as FOO, 2 as FOO; (the database has no probs with that)
> What result will PQfnumber return ????
When in doubt, look in the source code ...
/*
* PQfnumber: find column number given column name
*
* The column name is parsed as if it were in a SQL statement, including
* case-folding and double-quote processing. But note a possible gotcha:
* downcasing in the frontend might follow different locale rules than
* downcasing in the backend...
*
* Returns -1 if no match. In the present backend it is also possible
* to have multiple matches, in which case the first one is found.
*/
regards, tom lane
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