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Posted to issues@spark.apache.org by "Andrey Gubichev (Jira)" <ji...@apache.org> on 2024/09/15 22:11:00 UTC

[jira] [Created] (SPARK-49653) Support single joins for full scalar subquery decorrelation

Andrey Gubichev created SPARK-49653:
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             Summary: Support single joins for full scalar subquery decorrelation
                 Key: SPARK-49653
                 URL: https://issues.apache.org/jira/browse/SPARK-49653
             Project: Spark
          Issue Type: New Feature
          Components: SQL
    Affects Versions: 4.0.0
            Reporter: Andrey Gubichev


We should introduce Single join operator to fully support scalar subqueries.

The operator would ensure that the scalar subquery returns at most 1 row and issue a runtime error otherwise.

Design doc: https://docs.google.com/document/d/1NTsvtBTB9XvvyRvH62QzWIZuw4hXktALUG1fBP7ha1Q/edit



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