morrySnow commented on code in PR #15185:
URL: https://github.com/apache/doris/pull/15185#discussion_r1064327792
##########
fe/fe-core/src/main/java/org/apache/doris/nereids/util/TypeCoercionUtils.java:
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@@ -196,6 +194,8 @@ public static Optional<DataType>
findTightestCommonType(DataType left, DataType
tightestCommonType = right;
} else if (right instanceof NullType) {
tightestCommonType = left;
+ } else if (left instanceof BooleanType || right instanceof
BooleanType) {
+ tightestCommonType = DoubleType.INSTANCE;
} else if (left instanceof IntegralType && right instanceof
DecimalV2Type
Review Comment:
this is not right, think about boolean with decimal or with stringliketype
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