Alessandro Solimando created CALCITE-4917:
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Summary: Add test for 'IS NOT NULL(a) AND a=b' simplifies to "a=b"
for UnknownAsFalse semantics
Key: CALCITE-4917
URL: https://issues.apache.org/jira/browse/CALCITE-4917
Project: Calcite
Issue Type: Test
Components: core
Affects Versions: 1.28.0
Reporter: Alessandro Solimando
Assignee: Alessandro Solimando
Simplification (from _RexSimplify_ class) is mostly covered is
{_}RexProgramTest{_}, a test for
expressions of the form "IS NOT NULL(a) AND a=b" => "a=b" under the
"UnknownAsFalse" semantics and not simplified under "UnknownAsUnknown" one,
seems uncovered.
Since I had to write a test to make sure the simplification was as expected, I
assume others might end up doing the same, and that the test will both act as
documentation and it will also protect against regressions.
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