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feat: Improve subquery support #110

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feat: Improve subquery support #110

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MazterQyou
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This PR improves subquery support, enabling:

  • Scalar subqueries in WHERE
  • EXISTS subqueries
  • ANY/ALL subqueries

Additionally, ANY now supports all operators, and support for ALL was added.

TODO:

  • Fix an issue where the query with subqueries in SELECT and WHERE won't execute
  • Add subquery support for JOIN conditions
  • Should we support subqueries inside subqueries?

@MazterQyou MazterQyou mentioned this pull request Apr 6, 2023
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@MazterQyou MazterQyou force-pushed the cubesql/subquery-improvement branch 2 times, most recently from 5e65b8d to 6cecef6 Compare May 26, 2023 18:45
@MazterQyou MazterQyou force-pushed the cubesql/subquery-improvement branch from 6cecef6 to d644636 Compare June 16, 2023 22:10
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