AlterQuery  tmp (children 2)
 ExpressionList (children 1)
  AlterCommand UPDATE (children 2)
   Literal UInt64_1
   ExpressionList (children 1)
    Assignment n (children 1)
     Function sleepEachRow (children 1)
      ExpressionList (children 1)
       Literal UInt64_1
 Identifier tmp