Julian Hyde created CALCITE-1864:
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Summary: Allow NULL as argument
Key: CALCITE-1864
URL: https://issues.apache.org/jira/browse/CALCITE-1864
Project: Calcite
Issue Type: Bug
Reporter: Julian Hyde
Assignee: Julian Hyde
Even though the SQL standard does not allow raw (non-casted) NULL literals,
most databases do. So we should allow {{1 = null}} or {{select * from emp where
empno > null}}. Of course, these expressions always return UNKNOWN.
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