SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 5)
   ExpressionList (children 1)
    Identifier a (alias key)
   ExpressionList (children 1)
    Identifier key (alias k1)
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier test
   ExpressionList (children 1)
    Identifier key
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier key
