AlterQuery  02681_undrop_detach (children 2)
 ExpressionList (children 1)
  AlterCommand UPDATE (children 2)
   Function equals (children 1)
    ExpressionList (children 2)
     Identifier id
     Literal UInt64_1
   ExpressionList (children 1)
    Assignment num (children 1)
     Literal UInt64_2
 Identifier 02681_undrop_detach
