9 Commits (adfc157dd91471e995f3aa72e0fb5b50ecd93575)

Author	SHA1	Message	Date
Bruce Momjian	0a78320057	pgindent run for 9.4 ... This includes removing tabs after periods in C comments, which was applied to back branches, so this change should not effect backpatching.	12 years ago
Tom Lane	77585bce03	Do ScalarArrayOp estimation correctly when array is a stable expression. ... Most estimation functions apply estimate_expression_value to see if they can reduce an expression to a constant; the key difference is that it allows evaluation of stable as well as immutable functions in hopes of ending up with a simple Const node. scalararraysel didn't get the memo though, and neither did gincost_opexpr/gincost_scalararrayopexpr. Fix that, and remove a now-unnecessary estimate_expression_value step in the subsidiary function scalararraysel_containment. Per complaint from Alexey Klyukin. Back-patch to 9.3. The problem goes back further, but I'm hesitant to change estimation behavior in long-stable release branches.	12 years ago
Bruce Momjian	7e04792a1c	Update copyright for 2014 ... Update all files in head, and files COPYRIGHT and legal.sgml in all back branches.	12 years ago
Bruce Momjian	bd61a623ac	Update copyrights for 2013 ... Fully update git head, and update back branches in ./COPYRIGHT and legal.sgml files.	13 years ago
Andrew Dunstan	33a7101281	Quiet a few MSC compiler warnings.	13 years ago
Alvaro Herrera	c219d9b0a5	Split tuple struct defs from htup.h to htup_details.h ... This reduces unnecessary exposure of other headers through htup.h, which is very widely included by many files. I have chosen to move the function prototypes to the new file as well, because that means htup.h no longer needs to include tupdesc.h. In itself this doesn't have much effect in indirect inclusion of tupdesc.h throughout the tree, because it's also required by execnodes.h; but it's something to explore in the future, and it seemed best to do the htup.h change now while I'm busy with it.	14 years ago
Bruce Momjian	927d61eeff	Run pgindent on 9.2 source tree in preparation for first 9.3 ... commit-fest.	14 years ago
Tom Lane	e2eed78910	Remove useless "rough estimate" path from mcelem_array_contained_selec. ... The code in this function that tried to cope with a missing count histogram was quite ineffective for anything except a perfectly flat distribution. Furthermore, since we were already punting for missing MCELEM slot, it's rather useless to sweat over missing DECHIST: there are no cases where ANALYZE will create the first but not the second. So just simplify the code by punting rather than pretending we can do something useful.	14 years ago
Tom Lane	0e5e167aae	Collect and use element-frequency statistics for arrays. ... This patch improves selectivity estimation for the array <@, &&, and @> (containment and overlaps) operators. It enables collection of statistics about individual array element values by ANALYZE, and introduces operator-specific estimators that use these stats. In addition, ScalarArrayOpExpr constructs of the forms "const = ANY/ALL (array_column)" and "const <> ANY/ALL (array_column)" are estimated by treating them as variants of the containment operators. Since we still collect scalar-style stats about the array values as a whole, the pg_stats view is expanded to show both these stats and the array-style stats in separate columns. This creates an incompatible change in how stats for tsvector columns are displayed in pg_stats: the stats about lexemes are now displayed in the array-related columns instead of the original scalar-related columns. There are a few loose ends here, notably that it'd be nice to be able to suppress either the scalar-style stats or the array-element stats for columns for which they're not useful. But the patch is in good enough shape to commit for wider testing. Alexander Korotkov, reviewed by Noah Misch and Nathan Boley	14 years ago