Hello,
I'm slightly stunned seeing a result from the EXPLAIN statement.
I have a table "T" with columns "a", "b", "c", "d" and a multi-column index
on (a, b, c)
I perform a query:
EXPLAIN SELECT * FROM T WHERE a = <some_value>, d = <some_value>, b =
<some_value>
The result tells me that MySQL is taking index (a, b, c). Why?
Furthermore, when I add another multi-column index (a, d, b) to match the
query above, EXPLAIN still tells me that it uses index (a, b, c).
Can someone enlighten my on this one???
Thanks,
Tobias.
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