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Posted to issues@drill.apache.org by "Victoria Markman (JIRA)" <ji...@apache.org> on 2015/02/11 20:43:12 UTC

[jira] [Created] (DRILL-2215) COALESCE function needs to be documented

Victoria Markman created DRILL-2215:
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             Summary: COALESCE function needs to be documented
                 Key: DRILL-2215
                 URL: https://issues.apache.org/jira/browse/DRILL-2215
             Project: Apache Drill
          Issue Type: Bug
          Components: Documentation
    Affects Versions: 0.8.0
            Reporter: Victoria Markman
            Assignee: Bridget Bevens


COALESCE function returns the first non-null expression in the list. If all expressions evaluate to null, then the COALESCE function will return null.

COALESCE( expr1, expr2, ... expr_n )
expr1 to expr_n are the expressions to test for non-null values.

Expressions have to be of the same type.



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