Обсуждение: regular expression and index on 7.2
Hi, I tried the following on 7.1.3-38 and pgsl used the index: EXPLAIN mp3base=# explain mp3base-# select * from mp3_ mp3base-# where name ~ '^cre'; NOTICE: QUERY PLAN: Index Scan using mp3_name on mp3_ (cost=0.00..8.14 rows=10 width=28) On an other machine I've a psql 7.2-1 and I got this result: mp3base=# explain mp3base-# select * from mp3_ mp3base-# where name ~ '^cre'; NOTICE: QUERY PLAN: Seq Scan on mp3_ (cost=0.00..2150.93 rows=363 width=794) On both machines is this index: CREATE INDEX "mp3_name" ON mp3_(name); Do you have any idea why it dosn't work with 7.2 ???? And what can I do to use the index ???? (7.2 runs on a mandrake and 7.1.3 on suseboth databases are created as: createdb -E LATIN1 mp3base Thx Holger ______________________________________________________________________________ Keine verlorenen Lotto-Quittungen, keine vergessenen Gewinne mehr! Beim WEB.DE Lottoservice: http://tippen2.web.de/?x=7
Holger Dörl <holger.doerl@web.de> writes: > Do you have any idea why it dosn't work with 7.2 ???? Perhaps you initdb'd 7.2 in a non-C locale? (contrib/pg_controldata is the way to check if you're not sure.) > And what can I do to use the index ???? re-initdb is the only way to change the database locale if it's wrong :-( regards, tom lane