14
14
describe select * from t1 where t1="ABC";
15
15
id select_type table type possible_keys key key_len ref rows Extra
17
17
describe select * from t1 where t1="ABCD";
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18
id select_type table type possible_keys key key_len ref rows Extra
19
19
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables