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drop table if exists t1;
create table t1 (a varchar(10), key(a));
insert into t1 values ("a"),("abc"),("abcd"),("hello"),("test");
explain select * from t1 where a like 'abc%';
table type possible_keys key key_len ref rows Extra
t1 range a a 11 NULL 1 Using where; Using index
explain select * from t1 where a like concat('abc','%');
table type possible_keys key key_len ref rows Extra
t1 range a a 11 NULL 1 Using where; Using index
select * from t1 where a like "abc%";
a
abc
abcd
select * from t1 where a like concat("abc","%");
a
abc
abcd
select * from t1 where a like "ABC%";
a
abc
abcd
select * from t1 where a like "test%";
a
test
select * from t1 where a like "te_t";
a
test
select * from t1 where a like "%a%";
a
a
abc
abcd
select * from t1 where a like "%abcd%";
a
abcd
select * from t1 where a like "%abc\d%";
a
abcd
drop table t1;
create table t1 (a varchar(10), key(a));
insert into t1 values ('a'), ('a\\b');
select * from t1 where a like 'a\\%' escape '#';
a
a\b
select * from t1 where a like 'a\\%' escape '#' and a like 'a\\\\b';
a
a\b
drop table t1;
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