Alexei Sorokin 4d8b04cda9 Clear out potential duplicates when semi-joining a union ...

Using a left outer join as a semi-join is not a valid approach.
Can still be used for an anti-semi-join.

2020-09-21 22:25:33 +03:00

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Clear out potential duplicates when semi-joining a union

2020-09-21 22:25:33 +03:00