Log Message: ----------- Change patternsel (LIKE/regex selectivity estimation) so that if there is a large enough histogram, it will use the number of matches in the histogram to derive a selectivity estimate, rather than the admittedly pretty bogus heuristics involving examining the pattern contents. I set 'large enough' at 100, but perhaps we should change that later. Also apply the same technique in contrib/ltree's <@ and @> estimator. Per discussion with Stefan Kaltenbrunner and Matteo Beccati. Modified Files: -------------- pgsql/contrib/ltree: ltree_op.c (r1.12 -> r1.13) (http://developer.postgresql.org/cvsweb.cgi/pgsql/contrib/ltree/ltree_op.c.diff?r1=1.12&r2=1.13) pgsql/src/backend/utils/adt: selfuncs.c (r1.212 -> r1.213) (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/selfuncs.c.diff?r1=1.212&r2=1.213) pgsql/src/include/utils: selfuncs.h (r1.34 -> r1.35) (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/utils/selfuncs.h.diff?r1=1.34&r2=1.35)
pgsql-committers by date:
Соглашаюсь с условиями обработки персональных данных