> Retrieves the first m rows of the selected output set.

It's not enought!
I should like to see a LIMIT block like PLAN
The client must limit resource of server what client permit for an SQL
command.
Limit time, limit result record count or for example limit disk read/write
of server.
If server runout limit must throw an exception end stop the execution: the
SQL command wrong.

eMeL

(sorry my poor english)