SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 3)
    Identifier k1
    Identifier k2
    Identifier payload
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier f
   Function equals (children 1)
    ExpressionList (children 2)
     Function dictGet (children 1)
      ExpressionList (children 3)
       Literal \'dict_prices_ch_array\'
       Literal \'tag\'
       Function tuple (children 1)
        ExpressionList (children 2)
         Identifier k1
         Identifier k2
     Literal \'pro\'
   ExpressionList (children 3)
    OrderByElement (children 1)
     Identifier k1
    OrderByElement (children 1)
     Identifier k2
    OrderByElement (children 1)
     Identifier payload
