Aditya Kishore created DRILL-508:
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             Summary: Use a map to lookup the convert_XXXX() funtions
                 Key: DRILL-508
                 URL: https://issues.apache.org/jira/browse/DRILL-508
             Project: Apache Drill
          Issue Type: Improvement
            Reporter: Aditya Kishore
            Assignee: Aditya Kishore
            Priority: Minor


Currently the convert_(to|from) expression calls are parsed to determine the 
minor type of such functions. We should move this to using a map to look-up and 
materialize the expression and return the type information from the 
materialized instance.

This requires DRILL-507.



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