diff --git a/jOOQ/src/main/java/org/jooq/impl/JSONNull.java b/jOOQ/src/main/java/org/jooq/impl/JSONNull.java
index 645c0668c8..f1257f18b8 100644
--- a/jOOQ/src/main/java/org/jooq/impl/JSONNull.java
+++ b/jOOQ/src/main/java/org/jooq/impl/JSONNull.java
@@ -53,7 +53,7 @@ import org.jooq.SQLDialect;
 /**
  * @author Lukas Eder
  */
-final class JSONNull extends AbstractQueryPart {
+final class JSONNull extends AbstractQueryPart implements SimpleQueryPart {
 
     /**
      * Generated UID
diff --git a/jOOQ/src/main/java/org/jooq/impl/JSONReturning.java b/jOOQ/src/main/java/org/jooq/impl/JSONReturning.java
index c542c97f29..a083237754 100644
--- a/jOOQ/src/main/java/org/jooq/impl/JSONReturning.java
+++ b/jOOQ/src/main/java/org/jooq/impl/JSONReturning.java
@@ -54,7 +54,7 @@ import org.jooq.SQLDialect;
 /**
  * @author Lukas Eder
  */
-final class JSONReturning extends AbstractQueryPart {
+final class JSONReturning extends AbstractQueryPart implements SimpleQueryPart {
 
     /**
      * Generated UID
diff --git a/jOOQ/src/main/java/org/jooq/impl/QueryPartCollectionView.java b/jOOQ/src/main/java/org/jooq/impl/QueryPartCollectionView.java
index af9ae9056b..ef2dae20be 100644
--- a/jOOQ/src/main/java/org/jooq/impl/QueryPartCollectionView.java
+++ b/jOOQ/src/main/java/org/jooq/impl/QueryPartCollectionView.java
@@ -61,7 +61,7 @@ import org.jooq.Statement;
  *
  * @author Lukas Eder
  */
-class QueryPartCollectionView<T extends QueryPart> extends AbstractQueryPart implements Collection<T> {
+class QueryPartCollectionView<T extends QueryPart> extends AbstractQueryPart implements Collection<T>, SimpleQueryPart {
 
     private static final long        serialVersionUID = -2936922742534009564L;
     final Collection<T>              wrapped;
@@ -97,6 +97,15 @@ class QueryPartCollectionView<T extends QueryPart> extends AbstractQueryPart imp
         return wrapped;
     }
 
+    @Override
+    public boolean isSimple() {
+        for (T e : this)
+            if (!Tools.isSimple(e))
+                return false;
+
+        return true;
+    }
+
     @Override
     public boolean rendersContent(Context<?> ctx) {
         return !isEmpty();
diff --git a/jOOQ/src/main/java/org/jooq/impl/RTrim.java b/jOOQ/src/main/java/org/jooq/impl/RTrim.java
index 77c6b137e9..9f09a93b1a 100644
--- a/jOOQ/src/main/java/org/jooq/impl/RTrim.java
+++ b/jOOQ/src/main/java/org/jooq/impl/RTrim.java
@@ -120,7 +120,7 @@ extends
 
 
                 case SQLITE:
-                    ctx.visit(function(N_RTRIM, getDataType(), string, characters)));
+                    ctx.visit(function(N_RTRIM, getDataType(), string, characters));
                     break;
 
                 default:
diff --git a/jOOQ/src/main/java/org/jooq/impl/Sqrt.java b/jOOQ/src/main/java/org/jooq/impl/Sqrt.java
index bfd3740c28..6ee6ecabab 100644
--- a/jOOQ/src/main/java/org/jooq/impl/Sqrt.java
+++ b/jOOQ/src/main/java/org/jooq/impl/Sqrt.java
@@ -103,7 +103,6 @@ extends
 
 
 
-
             case SQLITE:
                 ctx.visit(DSL.power(value, inline(0.5)));
                 break;