SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 3)
    Literal \'Decimal(M, D)\' (alias mysql_type)
    Function CAST (alias result) (children 1)
     ExpressionList (children 2)
      Literal Float64_47.21
      Literal \'decimal(4, 2)\'
    Function toTypeName (alias native_type) (children 1)
     ExpressionList (children 1)
      Identifier result
