On Wed 02 Jan 2008 04:23:46 AM EST, Pavel Stehule wrote: > Hello > > IDEA 3: > > Use two hash functions: > > CREATE UNIQUE INDEX uidx ON TEST((decode(md5(a),'hex')),(hashtext(a))); > > removing spaces helps > CREATE UNIQUE INDEX uidx ON test((decode(md5(lower(replace(a,' ',''))),'hex'))); > > Regards > Pavel Stehule > > CREATE UNIQUE INDEX nodups on MESSAGE (my_timestamp_col, md5(my_text_col)); What is the advantage of this method? -- Programming, economics, gardening, life in Cleveland. http://blog.tplus1.com ---------------------------(end of broadcast)--------------------------- TIP 4: Have you searched our list archives? http://archives.postgresql.org/
