I had a construct like the following:
IF NOT col1 AND NOT col2 THEN ...
In a scenario where both col1 and col2 were false, this condition was not triggered. If I rewrote it as:
IF ( NOT col1 ) AND ( NOT col2 ) THEN ...
the condition was triggered as expected.
I would expect NOT to bind more closely than AND. The docs on what behavior to expect here are pretty sparse in both the Logical Operators section (9.1) and Expression Evaluation Rules (4.2.11). I couldn't find anything either confirming or contradicting my expectations. Also, I didn't try this in standard SQL in a case construct, but I would assume the behavior would be the same?
If this is known and expected behavior, what would be the most appropriate section of the docs for further explanation of order of evaluation?
PostgreSQL 7.4.6 on i686-pc-linux-gnu, compiled by GCC 2.95.4.
-tfo
-- Thomas F. O'Connell Co-Founder, Information Architect Sitening, LLC http://www.sitening.com/ 110 30th Avenue North, Suite 6 Nashville, TN 37203-6320 615-260-0005
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