# focus of this file is testing the multi-index OR clause optimizer.
# defeat the point of the test.
# Make sure OR-clauses work correctly on UPDATE and DELETE statements.
# expensive way to do the query, but it works, and so a solution is possible.
# is able to use indices on x,y and x,z, or indices y,x and z,x.
# "Incorrect result from LEFT JOIN with OR in the WHERE clause"