SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Identifier _table
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function merge (children 1)
       ExpressionList (children 2)
        Literal \'test_03031\'
        Literal \'\'
   ExpressionList (children 2)
    OrderByElement (children 1)
     Identifier _table
    OrderByElement (children 1)
     Identifier s
