SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 5)
    Identifier tv.key
    Function toString (children 1)
     ExpressionList (children 2)
      Identifier tv.t
      Literal \'UTC\'
    Identifier md.bid
    Identifier tv.tv
    Identifier md.ask
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier tv
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      TableIdentifier md
     TableJoin (children 1)
      ExpressionList (children 2)
       Identifier key
       Identifier t
   ExpressionList (children 1)
    OrderByElement (children 1)
     Function tuple (children 1)
      ExpressionList (children 2)
       Identifier tv.key
       Identifier tv.t