[EMAIL PROTECTED] (Dave Cramer) wrote: > It appears that the optimizer only uses indexes for = clause?
It can use indices only if there is a given prefix. Thus: where text_field like 'A%' can use the index, essentially transforming this into the clauses where text_field >= 'A' and text_field < 'B'. You can't get much out of an index for where text_field like '%SOMETHING' -- (reverse (concatenate 'string "moc.enworbbc" "@" "enworbbc")) http://www3.sympatico.ca/cbbrowne/wp.html "When the grammar checker identifies an error, it suggests a correction and can even makes some changes for you." -- Microsoft Word for Windows 2.0 User's Guide, p.35: ---------------------------(end of broadcast)--------------------------- TIP 6: Have you searched our list archives? http://archives.postgresql.org