#566 - Refactor internals - SpiExpression, add prepareExpression() to merge queryAutoTuneHash() and queryPlanHash() - sameByPlan() & sameByBind()

src/main/java/com/avaje/ebeaninternal/server/expression/NonPrepareExpression.java

@@ -12,4 +12,9 @@ abstract class NonPrepareExpression implements SpiExpression {
   public void prepareExpression(BeanQueryRequest<?> request) {
     // do nothing
   }
+
+  @Override
+  public SpiExpression copyForPlanKey() {
+    return this;
+  }
 }