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Results tagged with index
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user 234077
A database structure that can improve the speed of queries at the cost of disk space and slower inserts/updates. It stores a copy of one or more columns sorted but structures the data differently to allow faster access.
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Sort index doesn't work for MySQL
I've noticed while profiling that the Creating sort index step takes a lot of time, so I've decided to create an index like that:
alter table record add index timestampidx (timestamp desc);
Unfortunately … | PRIMARY | name | 258 | NULL | 14 | 100.00 | Using index; Using temporary; Using filesort |
| 1 | SIMPLE | regression | NULL | ref | PRIMARY …
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