wutiangan commented on a change in pull request #3527:
URL: https://github.com/apache/incubator-doris/pull/3527#discussion_r431049795



##########
File path: fe/src/main/java/org/apache/doris/analysis/BinaryPredicate.java
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@@ -306,6 +300,10 @@ private Type getCmpType() {
             return Type.LARGEINT;
         }
 
+        if ((t1.isNumericType() && t2.isStringType()) || (t1.isStringType() && 
t2.isNumericType())) {
+            return t1.isNumericType() ? Type.fromPrimitiveType(t1) : 
Type.fromPrimitiveType(t2);
+        }

Review comment:
       At least equivalent comparison (decimaltype to decimaltype) does not 
need to be converted to double type, You can fix it by the way.




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