13 commits

Author	SHA1	Message	Date
Tom Lane	e6381966c1	Major planner/optimizer revision: get rid of PathOrder node type, ... store all ordering information in pathkeys lists (which are now lists of lists of PathKeyItem nodes, not just lists of lists of vars). This was a big win --- the code is smaller and IMHO more understandable than it was, even though it handles more cases. I believe the node changes will not force an initdb for anyone; planner nodes don't show up in stored rules.	1999-08-16 02:17:58 +00:00
Bruce Momjian	612b8434e4	optimizer cleanup	1999-02-19 05:18:06 +00:00
Bruce Momjian	8ab72a38df	optimizer cleanup	1999-02-19 02:05:20 +00:00
Bruce Momjian	cd550c7672	Update optimizer readme.	1999-02-15 22:19:01 +00:00
Bruce Momjian	fe35ffe7e0	Major optimizer improvement for joining a large number of tables.	1999-02-09 03:51:42 +00:00
Bruce Momjian	54e5d25666	Optimizer cleanup.	1999-02-08 04:29:25 +00:00
Bruce Momjian	ce3afccf7f	More optimizer cleanups.	1999-02-04 03:19:11 +00:00
Bruce Momjian	18fbe4142f	More optimizer renaming HInfo -> HashInfo.	1999-02-04 01:47:02 +00:00
Bruce Momjian	8d9237d485	Optimizer rename ClauseInfo -> RestrictInfo. Update optimizer README.	1999-02-03 20:15:53 +00:00
Bruce Momjian	2d32d909b5	Cleanup optimizer function names and clarify code.	1998-08-10 02:26:40 +00:00
Bruce Momjian	e46df2ff6e	OPTIMIZER_DEBUG additions.	1998-08-07 05:02:32 +00:00
Bruce Momjian	d3f0e87d17	Cost cleanup.	1997-12-18 12:21:02 +00:00
Bruce Momjian	d158fce8eb	Add optimizer README file.	1997-12-17 18:02:33 +00:00