>
> I think you mean (not date-range) and (not qualifier)? Otherwise you'll
> have (true OR ...) if the params are present... But that's a very neat
> trick!
>

Ah, yes, that's of course what I meant. Was wasting mental cycles on
parameter ordering... Use named parameters people!


> I ran it past our DBA and he verified that the execution plan definitely
> short-circuits the booleans with true / false (which was my initial concern
> after being somewhat gunshy of 'OR' in queries due to performance problems
> that has caused in complex queries).
>

You should also verify the `date < LEAST(NULL, MAX(date))` approach too. I
suspect that the query planner will summarily eliminate the aggregate.

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