binary expression type

Author: Arshia Malkani

src/main/java/net/sf/jsqlparser/expression/BinaryExpression.java

@@ -30,8 +30,8 @@ public abstract class BinaryExpression implements Expression {
     private Expression leftExpression;
     private Expression rightExpression;
     private boolean not = false;
-    
-    
+
+    public String expressionType = "None";
 
     public BinaryExpression() {
     }

src/main/java/net/sf/jsqlparser/expression/Expression.java

@@ -23,6 +23,5 @@
 
 public interface Expression {
 
-    String expressionType = "";
     void accept(ExpressionVisitor expressionVisitor);
 }