englefly commented on code in PR #15949:
URL: https://github.com/apache/doris/pull/15949#discussion_r1080724336
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fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/Multiply.java:
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@@ -44,7 +45,11 @@ public Expression withChildren(List<Expression> children) {
@Override
public DataType getDataType() {
- return left().getDataType().promotion();
+ DataType rightType = child(0).getDataType();
+ DataType leftType = child(1).getDataType();
+ DataType outputType = TypeCoercionUtils.findTightestCommonType(null,
+ rightType, leftType).orElseGet(() -> rightType);
+ return outputType;
Review Comment:
we need refactor getDateType() for all functions
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