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Tom Lane b8c798ebc5 Tweak tsmatchsel() so that it examines the structure of the tsquery whenever ... possible (ie, whenever the tsquery is a constant), even when no statistics are available for the tsvector. For example, foo @@ 'a & b'::tsquery can be expected to be more selective than foo @@ 'a'::tsquery, whether or not we know anything about foo. We use DEFAULT_TS_MATCH_SEL as the assumed selectivity of individual query terms when no stats are available, then combine the terms according to the query's AND/OR structure as usual. Per experimentation with Artur Dabrowski's example. (The fact that there are no stats available in that example is a problem in itself, but nonetheless tsmatchsel should be smarter about the case.) Back-patch to 8.4 to keep all versions of tsmatchsel() in sync.		16 years ago
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access	Rewrite the key-combination logic in GIN's keyGetItem() and scanGetItem()	16 years ago
bootstrap	CREATE TABLE IF NOT EXISTS.	16 years ago
catalog	Reduce lock levels of CREATE TRIGGER and some ALTER TABLE, CREATE RULE actions.	16 years ago
commands	Fix another longstanding problem in copy_relation_data: it was blithely	16 years ago
executor	Fix oversight in new EvalPlanQual logic: the second loop over the ExecRowMark	16 years ago
foreign	Wrap calls to SearchSysCache and related functions using macros.	16 years ago
lib	pgindent run for 9.0, second run	16 years ago
libpq	Make the Windows tcp keepalive support depend on the existance of the	16 years ago
main	Update copyright for the year 2010.	16 years ago
nodes	CREATE TABLE IF NOT EXISTS.	16 years ago
optimizer	Make NestLoop plan nodes pass outer-relation variables into their inner	16 years ago
parser	Improved version of patch to protect pg_get_expr() against misuse:	16 years ago
po	Translation updates for 9.0beta3	16 years ago
port	pgindent run for 9.0, second run	16 years ago
postmaster	Add restart_after_crash GUC.	16 years ago
regex	pgindent run for 9.0	16 years ago
replication	Add missing function prototype.	16 years ago
rewrite	Reduce lock levels of CREATE TRIGGER and some ALTER TABLE, CREATE RULE actions.	16 years ago
snowball	Update copyright for the year 2010.	16 years ago
storage	Make log_temp_files based on kB, and revert docs & comments to match.	16 years ago
tcop	CREATE TABLE IF NOT EXISTS.	16 years ago
tsearch	Tweak tsmatchsel() so that it examines the structure of the tsquery whenever	16 years ago
utils	Make details of the Numeric representation private to numeric.c.	16 years ago
Makefile	Split the LDFLAGS make variable into two parts: LDFLAGS is now used for	16 years ago
common.mk	Expand test coverage support to entire tree	17 years ago
nls.mk	Convert the core lexer and parser into fully reentrant code, by making use	17 years ago