On Tue, May 03, 2011 at 08:48:19AM +0200, Guillaume Lelarge wrote: > On 05/03/2011 05:52 AM, Tom Hartnett wrote: > > can it be done? > > > > create index my_idx on my_table(col1) where col1=''; > > > > ERROR: invalid input syntax for integer: "" > > > > Seems simple enough but I don't know what the trick is. > > > > col1 is an integer, not a string. And you cannot check for empty string > in an integer column. So if you've got a lot of records that display that column as an emtpy string, it's actually probably filled with a NULL, so your index create command would be something like: create index my_idx on my_table(col1) where col1 is null; Ross -- Ross Reedstrom, Ph.D. reedstrm@xxxxxxxx Systems Engineer & Admin, Research Scientist phone: 713-348-6166 Connexions http://cnx.org fax: 713-348-3665 Rice University MS-375, Houston, TX 77005 GPG Key fingerprint = F023 82C8 9B0E 2CC6 0D8E F888 D3AE 810E 88F0 BEDE -- Sent via pgsql-admin mailing list (pgsql-admin@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-admin
