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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