dailai commented on code in PR #6757:
URL: https://github.com/apache/seatunnel/pull/6757#discussion_r1593500730


##########
seatunnel-transforms-v2/src/main/java/org/apache/seatunnel/transform/sql/zeta/ZetaSQLType.java:
##########
@@ -177,12 +177,26 @@ public SeaTunnelDataType<?> getExpressionType(Expression 
expression) {
             SeaTunnelDataType<?> leftType = 
getExpressionType(binaryExpression.getLeftExpression());
             SeaTunnelDataType<?> rightType =
                     getExpressionType(binaryExpression.getRightExpression());
-            if (leftType.getSqlType() == SqlType.INT && rightType.getSqlType() 
== SqlType.INT) {
+            if ((leftType.getSqlType() == SqlType.TINYINT
+                            || leftType.getSqlType() == SqlType.SMALLINT
+                            || leftType.getSqlType() == SqlType.INT)
+                    && (rightType.getSqlType() == SqlType.TINYINT
+                            || rightType.getSqlType() == SqlType.SMALLINT
+                            || rightType.getSqlType() == SqlType.INT)) {
                 return BasicType.INT_TYPE;
             }
-            if ((leftType.getSqlType() == SqlType.INT || leftType.getSqlType() 
== SqlType.BIGINT)
-                    && (rightType.getSqlType() == SqlType.INT
-                            || rightType.getSqlType() == SqlType.BIGINT)) {
+            if ((leftType.getSqlType() == SqlType.TINYINT

Review Comment:
   As above?



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