> The problem is that you cannot depend upon factoring to reduce these complex
> statements. We need to retain a place holder (pointer) for each passed
> parameter. Otherwise we need to re-(parse and plan) the statement before each
> execution; thus, loosing one of the major benefits of PREPARE.
I think we already have such a problem. When using optimization
statistics, the optimizer checks the value of the constant to determine
how many rows will be returned by a "x > 10" by looking at the min/max
values for the column. Prepared queries where this value will change
would make that a problem.
--
Bruce Momjian | http://www.op.net/~candle
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