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  1. Tajo (Retired)
  2. TAJO-680

Improve the IN operator to support sub queries

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    Description

      Currently, the IN operator can be used with only sets of values.
      We need to improve it to support sub queries as the following example query.

      tajo> select * from nation where n_regionkey in (select r_regionkey from region); 
      

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          Jihoon Son
        2. Logical plan.png
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          Jihoon Son

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              jihoonson Jihoon Son
              jihoonson Jihoon Son
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