There was an interesting index related performance problem on Stack Overflow recently. The problem was to check an input string against a table that holds about 2000 prefix patterns (e.g.,
LIKE 'xyz%'). A fast select is needed that returns one row if any pattern matches the input string, or no row otherwise.
I believe my solution is worth a few extra words to explain it in more detail. Even though it’s a perfect fit for Use The Index, Luke it’s a little early to put it as an exercise there. It is, however, a very good complement (more...)
In Europe, many people love Open Source with its connotations of sharing and village co-operatives. On the other hand, many Europeans don’t like the big, successful American companies (witness the ritual McDonalds-bashing).
This emotional preference for Open Source to big American companies is why the EU competition authorities have decided (more...)