optimization tests + query builder

src/main/java/jef/expressions/TernaryExpression.java

@@ -1,10 +1,12 @@
 package jef.expressions;
 
 import lombok.AllArgsConstructor;
+import lombok.EqualsAndHashCode;
 import lombok.Getter;
 
 @Getter
 @AllArgsConstructor
+@EqualsAndHashCode
 public class TernaryExpression implements Expression {
     private final Expression cond;
     private final Expression whenTrue;