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Tom Lane 40608e7f94 When estimating the selectivity of an inequality "column > constant" or ... "column < constant", and the comparison value is in the first or last histogram bin or outside the histogram entirely, try to fetch the actual column min or max value using an index scan (if there is an index on the column). If successful, replace the lower or upper histogram bound with that value before carrying on with the estimate. This limits the estimation error caused by moving min/max values when the comparison value is close to the min or max. Per a complaint from Josh Berkus. It is tempting to consider using this mechanism for mergejoinscansel as well, but that would inject index fetches into main-line join estimation not just endpoint cases. I'm refraining from that until we can get a better handle on the costs of doing this type of lookup.		16 years ago
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Makefile	Update copyright for the year 2010.	16 years ago
dict.c	Update copyright for the year 2010.	16 years ago
dict_ispell.c	Update copyright for the year 2010.	16 years ago
dict_simple.c	Update copyright for the year 2010.	16 years ago
dict_synonym.c	Update copyright for the year 2010.	16 years ago
dict_thesaurus.c	Update copyright for the year 2010.	16 years ago
hunspell_sample.affix	Add regression tests for ispell, synonym and thesaurus dictionaries.	19 years ago
ispell_sample.affix	Add regression tests for ispell, synonym and thesaurus dictionaries.	19 years ago
ispell_sample.dict	Add regression tests for ispell, synonym and thesaurus dictionaries.	19 years ago
regis.c	Update copyright for the year 2010.	16 years ago
spell.c	Update copyright for the year 2010.	16 years ago
synonym_sample.syn	Add prefix support for synonym dictionary	17 years ago
thesaurus_sample.ths	Have text search thesaurus files use "?" for stop words.	18 years ago
to_tsany.c	Update copyright for the year 2010.	16 years ago
ts_locale.c	Update copyright for the year 2010.	16 years ago
ts_parse.c	Update copyright for the year 2010.	16 years ago
ts_selfuncs.c	When estimating the selectivity of an inequality "column > constant" or	16 years ago
ts_typanalyze.c	Update copyright for the year 2010.	16 years ago
ts_utils.c	Update copyright for the year 2010.	16 years ago
wparser.c	Update copyright for the year 2010.	16 years ago
wparser_def.c	Update copyright for the year 2010.	16 years ago