select value between (start , end) optimisation
WHAT I HAVE :
Given a huge table that contains two (BIGINT) fields :
- start_field
- end_field.
There is indexes on
- start_field
- end_field
WHAT I NEED TO DO
I need to find record where :
- start_field < value AND end_field > value
WHAT HAPPEN
if value is small regarding all value it can take, using the start_field index is not efficient as it need to parse all the other for end_field condition
if value is big, using end_field is not efficient.
and if value is in the middle the querry takes very long time
HOW CAN I IMPROVE PERFORMANCE ?
Regarding that the average (start_field - end_field ) field is not so big ?
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select value between (start , end) optimisation
6422
December 22, 2004 03:21AM
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December 22, 2004 08:01AM
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