104 Commits

Author	SHA1	Message	Date
Tom Lane	6cda3ad8fe	Cause planner to make use of average-column-width statistic that is now ... collected by ANALYZE. Also, add some modest amount of intelligence to guesses that are used for varlena columns in the absence of any ANALYZE statistics. The 'width' reported by EXPLAIN is finally something less than totally bogus for varlena columns ... and, in consequence, hashjoin estimating should be a little better ...	2001-05-09 00:35:09 +00:00
Peter Eisentraut	0967057b5d	minor copy editing	2001-03-24 23:03:26 +00:00
Tom Lane	a276392e52	Update example of partially constraining join order to use a subselect ... in FROM instead of an auxiliary view. We didn't have subselect-in-FROM when I wrote this originally...	2001-02-19 00:24:30 +00:00
Tom Lane	ad4fd77a5f	Restructure performance tips into a single chapter ('populating a ... database' was way too small to make a chapter). Add a section about using JOIN syntax to direct the planner.	2000-12-16 02:29:36 +00:00