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14 lines
866 B
SQL
14 lines
866 B
SQL
explain
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select * from (
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select 1 as foo
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from sakila.actor as actor_1,
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sakila.actor as actor_2
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) as x;
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+----+-------------+------------+-------+---------------+---------+---------+------+-------+-------------+
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| id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra |
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+----+-------------+------------+-------+---------------+---------+---------+------+-------+-------------+
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| 1 | PRIMARY | <derived2> | ALL | NULL | NULL | NULL | NULL | 40000 | |
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| 2 | DERIVED | actor_1 | index | NULL | PRIMARY | 2 | NULL | 200 | Using index |
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| 2 | DERIVED | actor_2 | index | NULL | PRIMARY | 2 | NULL | 200 | Using index |
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+----+-------------+------------+-------+---------------+---------+---------+------+-------+-------------+
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