eval = new SubstringEvaluator( ( SubstringNode ) exprNode, store, schemaManager );
evaluators.add( eval );
Cursor subStrCursor2 = new SubstringCursor( store, ( SubstringEvaluator ) eval );
cursors.add( subStrCursor2 );
orNode.addNode( exprNode );
cursor = new OrCursor( cursors, evaluators );
cursor.beforeFirst();
assertFalse( cursor.available() );