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  1. SELECT name FROM lineageServer_lives WHERE name LIKE 'Eve A%' ORDER BY generation DESC LIMIT 5;
  2.  
  3. SELECT name FROM lineageServer_lives WHERE name LIKE 'Eve Aa%' ORDER BY generation DESC LIMIT 5;
  4.  
  5. SELECT name FROM lineageServer_lives WHERE name LIKE 'Eve%' ORDER BY generation DESC LIMIT 5;
  6.  
  7. mysql> explain SELECT name FROM lineageServer_lives WHERE name LIKE 'Eve A%' ORDER BY generation DESC LIMIT 5;
  8. +----+-------------+---------------------+------------+-------+---------------+------------+---------+------+------+----------+-------------+
  9. | id | select_type | table | partitions | type | possible_keys | key | key_len | ref | rows | filtered | Extra |
  10. +----+-------------+---------------------+------------+-------+---------------+------------+---------+------+------+----------+-------------+
  11. | 1 | SIMPLE | lineageServer_lives | NULL | index | name | generation | 9 | NULL | 1343 | 0.37 | Using where |
  12. +----+-------------+---------------------+------------+-------+---------------+------------+---------+------+------+----------+-------------+
  13. 1 row in set, 1 warning (0.00 sec)
  14.  
  15. mysql> explain SELECT name FROM lineageServer_lives WHERE name LIKE 'Eve%' ORDER BY generation DESC LIMIT 5;
  16. +----+-------------+---------------------+------------+-------+---------------+------------+---------+------+------+----------+-------------+
  17. | id | select_type | table | partitions | type | possible_keys | key | key_len | ref | rows | filtered | Extra |
  18. +----+-------------+---------------------+------------+-------+---------------+------------+---------+------+------+----------+-------------+
  19. | 1 | SIMPLE | lineageServer_lives | NULL | index | name | generation | 9 | NULL | 71 | 7.02 | Using where |
  20. +----+-------------+---------------------+------------+-------+---------------+------------+---------+------+------+----------+-------------+
  21. 1 row in set, 1 warning (1.65 sec)
  22.  
  23. mysql> explain SELECT name FROM lineageServer_lives WHERE name LIKE 'Eve Aa%' ORDER BY generation DESC LIMIT 5;
  24. +----+-------------+---------------------+------------+-------+---------------+------+---------+------+------+----------+---------------------------------------+
  25. | id | select_type | table | partitions | type | possible_keys | key | key_len | ref | rows | filtered | Extra |
  26. +----+-------------+---------------------+------------+-------+---------------+------+---------+------+------+----------+---------------------------------------+
  27. | 1 | SIMPLE | lineageServer_lives | NULL | range | name | name | 256 | NULL | 1400 | 100.00 | Using index condition; Using filesort |
  28. +----+-------------+---------------------+------------+-------+---------------+------+---------+------+------+----------+---------------------------------------+
  29. 1 row in set, 1 warning (0.00 sec)
  30.  
  31. 96.20525475 | SELECT name FROM lineageServer_lives WHERE name LIKE 'Eve A%' ORDER BY generation DESC LIMIT 1
  32.  
  33. SELECT name FROM lineageServer_lives WHERE name LIKE 'Eve A%' and generation > 0 ORDER BY generation ASC LIMIT 1;
  34.  
  35. SELECT name FROM lineageServer_lives force index( name ) WHERE name LIKE 'Eve%' ORDER BY generation DESC LIMIT 5
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