AlterQuery  ttl (children 2)
 ExpressionList (children 1)
  AlterCommand UPDATE (children 2)
   Function equals (children 1)
    ExpressionList (children 2)
     Function modulo (children 1)
      ExpressionList (children 2)
       Identifier i
       Literal UInt64_2
     Literal UInt64_0
   ExpressionList (children 1)
    Assignment a (children 1)
     Literal UInt64_0
 Identifier ttl