[jira] [Created] (CALCITE-2469) RexSimplify should not optimize 'not(x) is null' to 'x is not null

[pengzhiwei (JIRA)]

pengzhiwei created CALCITE-2469:
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             Summary: RexSimplify should not optimize 'not(x) is null' to 'x is 
not null
                 Key: CALCITE-2469
                 URL: https://issues.apache.org/jira/browse/CALCITE-2469
             Project: Calcite
          Issue Type: Bug
          Components: core
    Affects Versions: 1.17.0
            Reporter: pengzhiwei
            Assignee: Julian Hyde


The RexSimplify has optimized the 'not(x) is null' to 'x is not null'. 
However,this is incorrect.It is same to the case 'not(x) is not null' .



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