SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    ColumnsListMatcher (children 2)
     ExpressionList (children 3)
      Identifier bar
      Identifier foo
      Identifier xyz
     ColumnsTransformerList (children 1)
      ColumnsApplyTransformer
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier test
