Jihoon Son created TAJO-680:
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Summary: Improve the IN operator to support sub queries
Key: TAJO-680
URL: https://issues.apache.org/jira/browse/TAJO-680
Project: Tajo
Issue Type: Improvement
Components: distributed query plan, parser
Reporter: Jihoon Son
Fix For: 1.0-incubating
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.
{noformat}
tajo> select * from nation where n_regionkey in (select r_regionkey from
region);
{noformat}
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