query index not used
Hi, I have the following simple self-explained query:
SELECT items.*
FROM gallery.items
WHERE left_ptr <= 7776
Mysql EXPLAIN output:
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE items ALL PRIMARY,left_ptr,right_ptr NULL NULL NULL 4858 Using where
I have an index on left_ptr; why is not used ?
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query index not used
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August 15, 2013 05:23AM
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August 31, 2013 03:41PM
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