On 11/7/14, 5:14 AM, Artūras Lapinskas wrote:
> thanks for your time and answer. Not treating IS NULL as equality operator definitely helps me to make more sense out
ofprevious explains.
You can also try creating a partial index WHERE b IS NULL. WHERE b IS NOT NULL can also sometimes be useful, though for
differentreasons.
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Jim Nasby, Data Architect, Blue Treble Consulting
Data in Trouble? Get it in Treble! http://BlueTreble.com