diff --git a/fe/fe-core/src/main/java/org/apache/doris/analysis/ArithmeticExpr.java b/fe/fe-core/src/main/java/org/apache/doris/analysis/ArithmeticExpr.java
index 503b50699081f7..c9bbb3c1cd5fd7 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/analysis/ArithmeticExpr.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/analysis/ArithmeticExpr.java
@@ -30,6 +30,7 @@
 import org.apache.doris.common.AnalysisException;
 import org.apache.doris.common.io.Text;
 import org.apache.doris.common.util.VectorizedUtil;
+import org.apache.doris.qe.ConnectContext;
 import org.apache.doris.thrift.TExprNode;
 import org.apache.doris.thrift.TExprNodeType;
 import org.apache.doris.thrift.TExprOpcode;
@@ -362,6 +363,8 @@ private Type findCommonType(Type t1, Type t2) {
             return Type.DOUBLE;
         } else if (pt1 == PrimitiveType.DECIMALV2 || pt2 == PrimitiveType.DECIMALV2) {
             return pt1 == PrimitiveType.DECIMALV2 && pt2 == PrimitiveType.DECIMALV2
+                    || (ConnectContext.get() != null
+                    && ConnectContext.get().getSessionVariable().roundPreciseDecimalV2Value)
                     ? Type.MAX_DECIMALV2_TYPE : Type.DOUBLE;
         } else if (pt1 == PrimitiveType.DECIMAL32 || pt2 == PrimitiveType.DECIMAL32) {
             return pt1 == PrimitiveType.DECIMAL32 && pt2 == PrimitiveType.DECIMAL32 ? Type.DECIMAL32 : Type.DOUBLE;