[jira] [Created] (CALCITE-6079) SqlOperatorTest should check that expressions that return NULL have a nullable type

["Julian Hyde (Jira)" <ji...@apache.org>]

Julian Hyde created CALCITE-6079:
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             Summary: SqlOperatorTest should check that expressions that return NULL have a nullable type
                 Key: CALCITE-6079
                 URL: https://issues.apache.org/jira/browse/CALCITE-6079
             Project: Calcite
          Issue Type: Improvement
            Reporter: Julian Hyde


{{SqlOperatorTest}} should check that expressions that return NULL have a nullable type. This can be done by extending {{SqlOperatorTestFixture.checkNull}} to look at the type.

We will probably catch a few operators whose type-inference strategy is slightly off. Looks like {{{}REGEXP_EXTRACT_ALL{}}}, {{{}CHR{}}}, {{TO_CODE_POINTS}} have some problems.



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