If I have the following table:
create table testing( id int unsigned not null primary key auto_increment, idx1 int unsigned not null, idx2 int unsigned not null, index(idx1), index(idx2));
In this query i expect mySQL to use one of the two indices to speed up the query, but It doesn't.. :(
select * from testing where idx1=0 or idx2=1;
The thing I'm thinking about instead is the following query: select * from testing where idx1=0 UNION select * from testing where idx2=1;
It looks like this does speed up the query, but is this the way to go??? Is this a weaknes in mySQL or have I forgotten something?
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