Julian Hyde created CALCITE-1042:
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Summary: Ensure that FILTER is BOOLEAN NOT NULL
Key: CALCITE-1042
URL: https://issues.apache.org/jira/browse/CALCITE-1042
Project: Calcite
Issue Type: Bug
Reporter: Julian Hyde
Assignee: Julian Hyde
When an AggregateCall is created either by SqlToRelConverter or RelBuilder,
make sure that it has type BOOLEAN and that it is NOT NULL.
* If it is not BOOLEAN, RelBuilder should throw.
* If it is nullable, wrap the expression in IS TRUE.
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