use `Exec` when we don't care about the result
use `Exec` when we don't care about the result

This prevents us from leaking a connection until the rows are read from
the cursor.

Signed-off-by: Robert Neumann <0e50484e9096968d17f79de0206b195d065c4510@pivotal.io>

concourse/concourse,concourse/concourse,concourse/concourse,concourse/concourse,concourse/concourse