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CREATE TABLE tbl (id int, field1 varchar(255)); CREATE INDEX field1_ix ON tbl(field1); EXPLAIN SELECT * FROM tbl WHERE `field1` LIKE '_aa_a_'; EXPLAIN SELECT * FROM tbl WHERE `field1` = '_aa_a_'; CREATE FULLTEXT INDEX field1_ft_ix ON tbl(field1); EXPLAIN SELECT * FROM tbl WHERE `field1` LIKE '_aa_a_'; EXPLAIN SELECT * FROM tbl WHERE `field1` = '_aa_a_';
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