Sometimes things don’t work as expected. Sometimes it’s as simple as a syntax error. Sometimes it’s a little more complex like an index that should have been used but instead a full scan is done. Perhaps a sub-query with an IN needs to replace a join. Or a statement is taking a lot longer than it should. Finding out what is going on can be as simple as prefixing the statement with EXPLAIN VERBOSE. In any event, please feel free to contact Regatta support.