Mark Kirkwood <[EMAIL PROTECTED]> writes: > Tom Lane wrote: >> Hmmm ... it strikes me that someone wanting this level of detail >> would be better advised to look into the source code.
> I did wonder about about it being better placed in 'internals' > somewhere, but it seemed to follow on from the 'explain' and 'stats' > sections quite well. The internals section would be a good compromise. ISTM that in the context of the "performance tips" chapter, all that people really want to know is that the planner uses the pg_statistic entries to estimate numbers of matching rows --- just how it goes about it is irrelevant detail at that point. regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 9: the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match