I would like to replace MonetDB' sorting algorithms (timsort/quicksort) with my own.

As the first step, I commented all content of function do_sort() in gdk_batop.c to disable the sorting functionality.

Then I re-build the monetdb (with no error) and type a SQL statement with ORDER-BY clause in mclient interface:

"select o_orderkey, o_custkey, o_orderstatus from orders order by o_custkey limit 10;"

I was expecting to see the dis-ordered result. However, it turns out that the result is still ordered by o_custkey.

I am confused about the result. Did I miss something? Any help would be great.

Best regards,

John