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8 lines
394 B
8 lines
394 B
explain select * from ((select 4 as a) union all (select 33 as a)) tmp order by a desc limit 1;
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id estRows task access object operator info
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TopN_17 1.00 root Column#3:desc, offset:0, count:1
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└─Union_21 2.00 root
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├─Projection_22 1.00 root 4->Column#3
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│ └─TableDual_23 1.00 root rows:1
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└─Projection_24 1.00 root 33->Column#3
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└─TableDual_25 1.00 root rows:1
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