Tom Lane wrote:
"Joshua D. Drake" <[EMAIL PROTECTED]> writes:
Rules are extremely slow in comparisons and not anywhere near as
flexible. As I said up post yesterday... they work well in the basic
partitioning configuration but anything else they are extremely deficient.
I think that the above claim is exceedingly narrow-minded.
We are talking about partitioning. It is supposed to be narrow-minded.
A trigger
will probably beat a rule for inserts/updates involving a small number
of rows.
Which is exactly what partitioning is doing.
For large numbers of rows, like an INSERT/SELECT from another
large table, the rule is likely to win, because its overhead is paid
once per query not once per row. Also, if you implement the trigger
with an EXECUTE (forcing a planning cycle) intead of hard-coded
commands, the speed advantage becomes even more dubious.
Not for partitioning. Although I agree with your sentiments for normal
operation.
Sincerely,
Joshua D. Drake
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