amaliujia commented on a change in pull request #1975:
URL: https://github.com/apache/calcite/pull/1975#discussion_r424883844
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File path: core/src/main/java/org/apache/calcite/sql/type/InferTypes.java
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@@ -67,6 +67,9 @@ private InferTypes() {}
*/
public static final SqlOperandTypeInference RETURN_TYPE =
(callBinding, returnType, operandTypes) -> {
+ if (returnType == null) {
+ return;
Review comment:
Can this return nothing? Is the return type is "VOID" (seems not so)?
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