Your patch has been added to the PostgreSQL unapplied patches list at:

I will try to apply it within the next 48 hours.

> Hi,
> Per the recent discussion there's been some code changes in JDBC's 
> DatabaseMetaData.getColumn(). I proposed a patch that would change the 
> number of queries to find out all columns in a table from 2 * N + 1 to 1 (N 
> being the number of columns reported) by using some outer joins. I also 
> fixed the fact that getColumns() only returned columns that had a default 
> defined. OTOH, I did not use to change the code required for obtaining a 
> column's remarks (by using col_description() for 7.2  and requested by Tom 
> Lane).
> Finally, I have found a way to get all the column details in a single query 
> *and* use col_description() for 7.2 servers. A patch is attached. It 
> overrules Ren? Pijlman's fix for this that was committed just today, but 
> still used N + 1 queries (sorry Ren? ;-) )
> I also fixed the return values for TABLE_CAT and TABLE_SCHEM from "" to 
> null, to be more standard compliant (and requested in Ren?'s mail found at 
> As always, the JDBC1 version has not been tested as I have no JDK 1.1 
> available.
> Please review,
> Jeroen

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