optimization tests + query builder

src/main/java/jef/expressions/IntermediateFieldExpression.java

@@ -1,9 +1,11 @@
 package jef.expressions;
 
 import jef.expressions.selectable.SelectableExpression;
+import lombok.EqualsAndHashCode;
 import lombok.Getter;
 
 @Getter
+@EqualsAndHashCode(callSuper = false)
 public class IntermediateFieldExpression extends ConstantExpression implements SelectableExpression, Expression {
     private final String name;
     private final String classDescriptor;