mgaido91 opened a new pull request #23450: [SPARK-26078][SQL][BACKPORT-2.3] Dedup self-join attributes on IN subqueries URL: https://github.com/apache/spark/pull/23450 ## What changes were proposed in this pull request? When there is a self-join as result of a IN subquery, the join condition may be invalid, resulting in trivially true predicates and return wrong results. The PR deduplicates the subquery output in order to avoid the issue. ## How was this patch tested? added UT
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