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Posted to issues@drill.apache.org by "Victoria Markman (JIRA)" <ji...@apache.org> on 2015/03/12 20:38:38 UTC

[jira] [Created] (DRILL-2443) Document implicit casting rules

Victoria Markman created DRILL-2443:
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             Summary: Document implicit casting rules
                 Key: DRILL-2443
                 URL: https://issues.apache.org/jira/browse/DRILL-2443
             Project: Apache Drill
          Issue Type: Improvement
          Components: Documentation
            Reporter: Victoria Markman
            Assignee: Bridget Bevens


This document should describe the implicit casting rules in different operations: joins, "union all" and functions.

For example,
if t1.a1 is defined as an INTEGER and t2.a2 is defined as BIGINT, using these two columns in a join predicate will result in t1.a1 to be converted to BIGINT implicitly and explicit cast will not be needed:

select * from t1, t2 where t1.a1 = t2.a2;



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