mihaibudiu commented on code in PR #4353:
URL: https://github.com/apache/calcite/pull/4353#discussion_r2070613685
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core/src/main/java/org/apache/calcite/sql/fun/SqlCoalesceFunction.java:
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@@ -80,4 +93,40 @@ public SqlCoalesceFunction() {
assert call.getFunctionQuantifier() == null;
return SqlCase.createSwitched(pos, null, whenList, thenList, elseExpr);
}
+
+ @Override @NonNull public RelDataType inferReturnType(
Review Comment:
I am afraid that this solution has the same problems as your previous one:
it modifies (using type coercion) operand types during the *return* type
inference. I think you are only allowed to change the operand types during
*operand* type inference.
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