optimization tests + query builder

src/main/java/jef/expressions/TableExpression.java

@@ -1,8 +1,10 @@
 package jef.expressions;
 
+import lombok.EqualsAndHashCode;
 import lombok.Getter;
 
 @Getter
+@EqualsAndHashCode(callSuper = false)
 public class TableExpression extends ConstantExpression {
     private final String name;