[jira] [Created] (TAJO-73) Improve SQL parser to be more compatible with SQL-92 standard

["Hyunsik Choi (JIRA)" <ji...@apache.org>]

Hyunsik Choi created TAJO-73:
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             Summary: Improve SQL parser to be more compatible with SQL-92 standard
                 Key: TAJO-73
                 URL: https://issues.apache.org/jira/browse/TAJO-73
             Project: Tajo
          Issue Type: Improvement
          Components: parser
            Reporter: Hyunsik Choi
            Assignee: Hyunsik Choi
             Fix For: 0.2-incubating


The current parser only supports a subset of SQL-92 standard. We need to improve SQL parser to be more compatible with SQL-92 standard.

Especially, the parser should deal with the following rules:

* Scalar subquery
* Table subquery
* IN predicate
* EXIST predicate

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