> If you really need to match all those options, you can't use an index. A > substring-matching index would need to have multiple entries per > character per value (since it doesn't know what you will search for). > The index-size becomes unmanageable very quickly. > That's why I asked what you really wanted to match. To be more specific, in fact, our current application allows to delete email(s) with a minimum of 3 characters. There is a note/warning also given for application Users' before deleting, explaining the implication of this delete action (partial & case-insensitive, and it could be wide-ranging too). > So, I'll ask again: do you really want to match all of those options? Yes, as explained above, I want to match all those. -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
