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https://issues.apache.org/jira/browse/CALCITE-7216?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18024158#comment-18024158
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Mihai Budiu commented on CALCITE-7216:
--------------------------------------
Turns out that there is a manual test for coalesce already - using the builder.
I have updated more places, but found only one instance for "array element"
where the type comes from inferReturnType.
Perhaps you are saying that the requireNonNull should be replaced everywhere,
but I assumed that in some places it really indicates a compiler bug rather
than a malformed input.
> SqlOperator.inferReturnType throws the wrong exception on error
> ---------------------------------------------------------------
>
> Key: CALCITE-7216
> URL: https://issues.apache.org/jira/browse/CALCITE-7216
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.40.0
> Reporter: Mihai Budiu
> Assignee: Mihai Budiu
> Priority: Minor
> Labels: pull-request-available
> Fix For: 1.41.0
>
>
> This code fragment:
> {code:java}
> RelDataType returnType = returnTypeInference.inferReturnType(opBinding);
> if (returnType == null) {
> throw new IllegalArgumentException("Cannot infer return type for "
> + opBinding.getOperator() + "; operand types: "
> + opBinding.collectOperandTypes());
> }
> {code}
> throws IllegalArgumentException. I think it should throw a
> CalciteContextException.
> Exceptions that are not CalciteExceptions should be used only to signal bugs
> in the compiler, but not illegal input programs.
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