Barry Kelly created CALCITE-6343:
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Summary: AS alias operator strips MEASUREness from measures
Key: CALCITE-6343
URL: https://issues.apache.org/jira/browse/CALCITE-6343
Project: Calcite
Issue Type: Bug
Components: core
Affects Versions: 1.36.0
Reporter: Barry Kelly
Fix For: 1.37.0
[CALCITE-5869|https://issues.apache.org/jira/browse/CALCITE-5869] introduced a
change which removes MEASURE when inferring the return type when an operator is
applied.
The {{AS}} keyword for aliases is implemented as an operator in the SQL AST.
Using {{AS}} removes MEASURE when typing expressions that have an alias in the
{{SELECT}} clause.
Thus, the type of {{SELECT m}} and {{SELECT m AS m}} are different when {{m}}
is a measure. This is not desirable.
Proposed fix: don't change type when using the {{AS}} operator.
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