Larry Lennhoff <[EMAIL PROTECTED]> writes:
> What I want to do is find all the rows in
> A which were built before now() - build_interval seconds ago. If I could
> just write this in SQL it would look something like:
> SELECT A.id FROM A JOIN B ON (join_col) WHERE built_on < now() - interval
> 'build_interval seconds';
You are confused about the difference between a literal constant and an
expression. Try something like
... WHERE built_on < now() - build_interval * interval '1 second';
which relies on the number-times-interval operator.
regards, tom lane
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TIP 9: the planner will ignore your desire to choose an index scan if your
joining column's datatypes do not match
