Juhwan Kim created CALCITE-2888:
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Summary: Enhance RexImplicationChecker to better handle filters
with CAST
Key: CALCITE-2888
URL: https://issues.apache.org/jira/browse/CALCITE-2888
Project: Calcite
Issue Type: Improvement
Components: core
Reporter: Juhwan Kim
Assignee: Juhwan Kim
I saw some cases where RexImplicationChecker gave an AssertionError when CAST
was involved in the filters.
For example, if a filter is
'>(CAST(SOME_VHARCHAR_INPUT_REF, DATE), SOME_DATE_LITERAL)',
currently, it removes CAST first and tries to convert DATE literal to VARCHAR
type,
which is not supported, and runtime AssertionError is thrown during implication
checking.
I think the issue can be solved by using RexExecutor's reduce function before
removing cast from literal side. Also, allowing other implementations of
RexExecutor would make it more flexible.
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