morrySnow commented on code in PR #14263:
URL: https://github.com/apache/doris/pull/14263#discussion_r1023469488
##########
fe/fe-core/src/main/java/org/apache/doris/nereids/util/TypeCoercionUtils.java:
##########
@@ -207,6 +210,22 @@ public static Optional<DataType>
findTightestCommonType(DataType left, DataType
tightestCommonType =
DecimalV2Type.widerDecimalV2Type((DecimalV2Type) left,
DecimalV2Type.forType(right));
} else if (left instanceof IntegralType && right instanceof
DecimalV2Type) {
tightestCommonType =
DecimalV2Type.widerDecimalV2Type((DecimalV2Type) right,
DecimalV2Type.forType(left));
+ } else if (left instanceof DateLikeType && right instanceof
DateLikeType) {
+ if (left instanceof DateTimeV2Type && right instanceof
DateTimeV2Type) {
+ if (((DateTimeV2Type) left).getScale() > ((DateTimeV2Type)
right).getScale()) {
+ tightestCommonType = left;
+ } else {
+ tightestCommonType = right;
+ }
+ } else if (left instanceof DateTimeV2Type) {
+ tightestCommonType = left;
+ } else if (right instanceof DateTimeV2Type) {
+ tightestCommonType = right;
+ } else if (left instanceof DateTimeType || right instanceof
DateTimeType) {
+ tightestCommonType = DateTimeType.INSTANCE;
+ } else if (left instanceof DateV2Type || right instanceof
DateV2Type) {
+ tightestCommonType = DateV2Type.INSTANCE;
+ }
Review Comment:
DateTimeType
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