git.net

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[jira] [Created] (CALCITE-2620) Simplify "coalesce(null,x)" to "x"


pengzhiwei created CALCITE-2620:
-----------------------------------

             Summary: Simplify "coalesce(null,x)" to "x"
                 Key: CALCITE-2620
                 URL: https://issues.apache.org/jira/browse/CALCITE-2620
             Project: Calcite
          Issue Type: Improvement
          Components: core
    Affects Versions: 1.18.0
            Reporter: pengzhiwei
            Assignee: Julian Hyde


"coalesce(x0,x1,.....)" can be simplified if any of "xi" is null literal.

e.g.  "coalesce(null,x)" can simplify to "x", "coalesce(x,null,y)" can simplify to "coalesce(x,y)"



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)