Fix javadoc, loop in containsNull(), and data conversion error message

h2/src/main/org/h2/result/LocalResultImpl.java

@@ -220,12 +220,12 @@ public class LocalResultImpl implements LocalResult {
         if (r == null) {
             r = false;
             reset();
-            while (next()) {
+            loop: while (next()) {
                 Value[] row = currentRow;
                 for (int i = 0; i < visibleColumnCount; i++) {
                     if (row[i].containsNull()) {
                         r = true;
-                        break;
+                        break loop;
                     }
                 }
             }

h2/src/main/org/h2/value/ValueCollectionBase.java

@@ -12,7 +12,7 @@ import org.h2.message.DbException;
 import org.h2.util.MathUtils;
 
 /**
- * Base class for collection values.
+ * Base class for ARRAY and ROW values.
  */
 abstract class ValueCollectionBase extends Value {
 
@@ -64,7 +64,7 @@ abstract class ValueCollectionBase extends Value {
         int leftType = l.getType();
         int rightType = v.getType();
         if (rightType != ARRAY && rightType != ROW) {
-            throw getDataConversionError(leftType);
+            throw v.getDataConversionError(leftType);
         }
         ValueCollectionBase r = (ValueCollectionBase) v;
         Value[] leftArray = l.values, rightArray = r.values;