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Posted to issues@drill.apache.org by "Kristine Hahn (JIRA)" <ji...@apache.org> on 2015/03/13 00:00:41 UTC

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

     [ https://issues.apache.org/jira/browse/DRILL-2443?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Kristine Hahn updated DRILL-2443:
---------------------------------
    Assignee:     (was: Kristine Hahn)

> 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
>
> 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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