55 Commits (6f9ff92cc0ff6a07d2fe38abe044286ee98d44a0)

Author	SHA1	Message	Date
Bruce Momjian	6f9ff92cc0	Tid access method feature from Hiroshi Inoue, Inoue@tpf.co.jp	26 years ago
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.	27 years ago
Tom Lane	e1fad50a5d	Revise generation of hashjoin paths: generate one path per ... hashjoinable clause, not one path for a randomly-chosen element of each set of clauses with the same join operator. That is, if you wrote SELECT ... WHERE t1.f1 = t2.f2 and t1.f3 = t2.f4, and both '=' ops were the same opcode (say, all four fields are int4), then the system would either consider hashing on f1=f2 or on f3=f4, but it would *not* consider both possibilities. Boo hiss. Also, revise estimation of hashjoin costs to include a penalty when the inner join var has a high disbursion --- ie, the most common value is pretty common. This tends to lead to badly skewed hash bucket occupancy and way more comparisons than you'd expect on average. I imagine that the cost calculation still needs tweaking, but at least it generates a more reasonable plan than before on George Young's example.	27 years ago
Tom Lane	30da344cb1	Update comments about clause selectivity estimation.	27 years ago
Tom Lane	04578a9180	Further cleanups of indexqual processing: simplify control ... logic in indxpath.c, avoid generation of redundant indexscan paths for the same relation and index.	27 years ago
Tom Lane	7d572886d6	Fix coredump seen when doing mergejoin between indexed tables, ... for example in the regression test database, try select * from tenk1 t1, tenk1 t2 where t1.unique1 = t2.unique2; 6.5 has this same bug ...	27 years ago
Tom Lane	9e7e29e6c9	First cut at doing LIKE/regex indexing optimization in ... optimizer rather than parser. This has many advantages, such as not getting fooled by chance uses of operator names ~ and ~~ (the operators are identified by OID now), and not creating useless comparison operations in contexts where the comparisons will not actually be used as indexquals. The new code also recognizes exact-match LIKE and regex patterns, and produces an = indexqual instead of >= and <=. This change does NOT fix the problem with non-ASCII locales: the code still doesn't know how to generate an upper bound indexqual for non-ASCII collation order. But it's no worse than before, just the same deficiency in a different place... Also, dike out loc_restrictinfo fields in Plan nodes. These were doing nothing useful in the absence of 'expensive functions' optimization, and they took a considerable amount of processing to fill in.	27 years ago
Tom Lane	49ed4dd779	Further work on planning of indexscans. Cleaned up interfaces ... to index_selectivity so that it can be handed an indexqual clause list rather than a bunch of assorted derivative data.	27 years ago
Tom Lane	ac4913a0dd	Clean up messy clause-selectivity code in clausesel.c; repair bug ... identified by Hiroshi (incorrect cost attributed to OR clauses after multiple passes through set_rest_selec()). I think the code was trying to allow selectivities of OR subclauses to be passed in from outside, but noplace was actually passing any useful data, and set_rest_selec() was passing wrong data. Restructure representation of "indexqual" in IndexPath nodes so that it is the same as for indxqual in completed IndexScan nodes: namely, a toplevel list with an entry for each pass of the index scan, having sublists that are implicitly-ANDed index qual conditions for that pass. You don't want to know what the old representation was :-( Improve documentation of OR-clause indexscan functions. Remove useless 'notclause' field from RestrictInfo nodes. (This might force an initdb for anyone who has stored rules containing RestrictInfos, but I do not think that RestrictInfo ever appears in completed plans.)	27 years ago
Bruce Momjian	a71802e12e	Final cleanup.	27 years ago
Bruce Momjian	9b645d481c	Update #include cleanups	27 years ago
Bruce Momjian	2e6b1e63a3	Remove unused #includes in *.c files.	27 years ago
Bruce Momjian	4b2c2850bf	Clean up #include in /include directory. Add scripts for checking includes.	27 years ago
Bruce Momjian	fcff1cdf4e	Another pgindent run. Sorry folks.	27 years ago
Bruce Momjian	07842084fe	pgindent run over code.	27 years ago
Marc G. Fournier	8c3e8a8a0e	From: Tatsuo Ishii <t-ishii@sra.co.jp> ...	27 years ago
Bruce Momjian	75cccd0ad3	pathkeys fixes	27 years ago
Bruce Momjian	0ff2733355	Update pathkeys comparison function.	27 years ago
Bruce Momjian	31cce21fb0	Fix bushy plans. Cleanup.	27 years ago
Bruce Momjian	ba2883b264	Remove duplicate geqo functions, and more optimizer cleanup	27 years ago
Bruce Momjian	6724a50787	Change my-function-name-- to my_function_name, and optimizer renames.	27 years ago
Bruce Momjian	c0d17c7aee	JoinPath -> NestPath for nested loop.	27 years ago
Bruce Momjian	3fdb9bb9c7	Fix optimizer and make faster.	27 years ago
Bruce Momjian	55d0465009	optimizer update	27 years ago
Bruce Momjian	34ecb9d850	Optimizer cleanups.	27 years ago
Bruce Momjian	c873fcdaf4	Optimizer cleanup.	27 years ago
Bruce Momjian	8dc2209f71	optimizer cleanup	27 years ago
Bruce Momjian	6de25f09b1	Optimizer cleanup.	27 years ago
Bruce Momjian	4ea3f728e9	More optimization.	27 years ago
Bruce Momjian	d244df95db	More optimizer speedups.	27 years ago
Bruce Momjian	129543e22d	optimizer cleanup	27 years ago
Bruce Momjian	dbd80c97f4	Optimizer fix for samekeys() and cost fixes for longer optimizer keys.	27 years ago
Bruce Momjian	9dbb0efb0b	Optmizer cleanup	27 years ago
Bruce Momjian	f859c81c18	Rename Path.keys to Path.pathkeys. Too many 'keys' used for other things.	27 years ago
Bruce Momjian	fe35ffe7e0	Major optimizer improvement for joining a large number of tables.	27 years ago
Bruce Momjian	54e5d25666	Optimizer cleanup.	27 years ago
Bruce Momjian	a553760845	Optimizer cleanup.	27 years ago
Bruce Momjian	ae12e25263	Update optimizer comments.	27 years ago
Bruce Momjian	18fbe4142f	More optimizer renaming HInfo -> HashInfo.	27 years ago
Bruce Momjian	9322950aa4	Cleanup of source files where 'return' or 'var =' is alone on a line.	27 years ago
Bruce Momjian	8d9237d485	Optimizer rename ClauseInfo -> RestrictInfo. Update optimizer README.	27 years ago
Bruce Momjian	4090d17fee	SET_ARGS cleanup	27 years ago
Bruce Momjian	748e300317	Fix for AND/OR handling.	28 years ago
Bruce Momjian	fa1a8d6a97	OK, folks, here is the pgindent output.	28 years ago
Bruce Momjian	af74855a60	Renaming cleanup, no pgindent yet.	28 years ago
Bruce Momjian	d9be0ff432	MergeSort was sometimes called mergejoin and was confusing. Now ... it is now only mergejoin.	28 years ago
Bruce Momjian	584f9438ca	Rename Rel to RelOptInfo.	28 years ago
Bruce Momjian	6bd323c6b3	Remove un-needed braces around single statements.	28 years ago
Bruce Momjian	a32450a585	pgindent run before 6.3 release, with Thomas' requested changes.	28 years ago
Bruce Momjian	59f6a57e59	Used modified version of indent that understands over 100 typedefs.	29 years ago