David, > But I'm also interested in how Elein made the email domain case- > insensitive, since I'd like to have/create a truly case-insensitive > text type (ITEXT anyone?). The functions for the operator class there > were mainly written in SQL, and if it adds a significant overhead, > I'm not sure it'd be a good idea to use that approach for a case- > insensitive text type, since I use it quite a lot in my apps, and > often do LIKE queries against text data. Thoughts? Well, current case-insensitivity hacks definitely aren't compatible with LIKE as far as "begins with" indexes are concerned. Of course, floating LIKEs (%value%) are going to suck no matter what data type you're using. I created an operator for CI equality ... =~ ... which performs well on indexed columns. But it doesn't do "begins with". ITEXT is a TODO, but there are reasons why it's harder than it looks. -- --Josh Josh Berkus PostgreSQL @ Sun San Francisco
