Slow degenerate semi join, hoist select opt #1839
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zachmu
approved these changes
Jun 26, 2023
| @@ -481,6 +481,31 @@ select * from xy where x in ( | |||
| types: []plan.JoinType{plan.JoinTypeHash, plan.JoinTypeHash}, | |||
| exp: []sql.Row{{1, 0}}, | |||
| }, | |||
| { | |||
| q: ` | |||
| SELECT * | |||
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This is like an e e cummings poem
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This enables recursive subquery decorrelations, and adds a hash join execution option for semi joins that is equivalent to cached subquery existence checks.