* Tom Lane (tgl@sss.pgh.pa.us) wrote: > > - BIT_OR > > - BIT_AND > > - GROUP_CONCAT (for strings, added in MySQL 4.x) > > Unless these are doing something I don't see, they should be easily > writable using CREATE AGGREGATE. It'd be nice to have a place to put functions that people have written and found useful but that aren't part of the base. Even nicer would be to have this place be on postgresql.org and linked to from the documentation. I havn't needed BIT_OR or BIT_AND before but I've used the GROUP_CONCAT-type aggregate a couple of times. The first time I wanted that function it took me a while to find (though eventually I did in the mailing lists somewhere). Stephen
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