morrySnow commented on code in PR #20634:
URL: https://github.com/apache/doris/pull/20634#discussion_r1223919170
##########
fe/fe-core/src/main/java/org/apache/doris/nereids/util/TypeCoercionUtils.java:
##########
@@ -1077,12 +1077,26 @@ protected static Optional<DataType>
findCommonPrimitiveTypeForCaseWhen(DataType
return Optional.empty();
}
+ // decimalv3 and floating type
+ if (t1.isDecimalV3Type() || t2.isDecimalV3Type()) {
+ if (t1.isFloatType() || t2.isDoubleType() || t1.isDoubleType() ||
t2.isFloatType()) {
+ return t1.isDecimalV3Type() ? Optional.of(t2) :
Optional.of(t1);
+ }
+ }
Review Comment:
we need to select double or float according to decimal precision and scale
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