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- SELECT name FROM lineageServer_lives WHERE name LIKE 'Eve A%' ORDER BY generation DESC LIMIT 5;
- SELECT name FROM lineageServer_lives WHERE name LIKE 'Eve Aa%' ORDER BY generation DESC LIMIT 5;
- SELECT name FROM lineageServer_lives WHERE name LIKE 'Eve%' ORDER BY generation DESC LIMIT 5;
- mysql> explain SELECT name FROM lineageServer_lives WHERE name LIKE 'Eve A%' ORDER BY generation DESC LIMIT 5;
- +----+-------------+---------------------+------------+-------+---------------+------------+---------+------+------+----------+-------------+
- | id | select_type | table | partitions | type | possible_keys | key | key_len | ref | rows | filtered | Extra |
- +----+-------------+---------------------+------------+-------+---------------+------------+---------+------+------+----------+-------------+
- | 1 | SIMPLE | lineageServer_lives | NULL | index | name | generation | 9 | NULL | 1343 | 0.37 | Using where |
- +----+-------------+---------------------+------------+-------+---------------+------------+---------+------+------+----------+-------------+
- 1 row in set, 1 warning (0.00 sec)
- mysql> explain SELECT name FROM lineageServer_lives WHERE name LIKE 'Eve%' ORDER BY generation DESC LIMIT 5;
- +----+-------------+---------------------+------------+-------+---------------+------------+---------+------+------+----------+-------------+
- | id | select_type | table | partitions | type | possible_keys | key | key_len | ref | rows | filtered | Extra |
- +----+-------------+---------------------+------------+-------+---------------+------------+---------+------+------+----------+-------------+
- | 1 | SIMPLE | lineageServer_lives | NULL | index | name | generation | 9 | NULL | 71 | 7.02 | Using where |
- +----+-------------+---------------------+------------+-------+---------------+------------+---------+------+------+----------+-------------+
- 1 row in set, 1 warning (1.65 sec)
- mysql> explain SELECT name FROM lineageServer_lives WHERE name LIKE 'Eve Aa%' ORDER BY generation DESC LIMIT 5;
- +----+-------------+---------------------+------------+-------+---------------+------+---------+------+------+----------+---------------------------------------+
- | id | select_type | table | partitions | type | possible_keys | key | key_len | ref | rows | filtered | Extra |
- +----+-------------+---------------------+------------+-------+---------------+------+---------+------+------+----------+---------------------------------------+
- | 1 | SIMPLE | lineageServer_lives | NULL | range | name | name | 256 | NULL | 1400 | 100.00 | Using index condition; Using filesort |
- +----+-------------+---------------------+------------+-------+---------------+------+---------+------+------+----------+---------------------------------------+
- 1 row in set, 1 warning (0.00 sec)
- 96.20525475 | SELECT name FROM lineageServer_lives WHERE name LIKE 'Eve A%' ORDER BY generation DESC LIMIT 1
- SELECT name FROM lineageServer_lives WHERE name LIKE 'Eve A%' and generation > 0 ORDER BY generation ASC LIMIT 1;
- SELECT name FROM lineageServer_lives force index( name ) WHERE name LIKE 'Eve%' ORDER BY generation DESC LIMIT 5
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