* We meant well but it turns out that the array unnest and join is
actually very slow, as the join arguments do not get pushed down
into the CTE (in Postgres 9/10 at least, later versions remove some
of the optimization barriers in that specifc type of query)
* This caused a seq scan on both device and device_port, and the query
is executed many times during macsuck
* The query is now rewritten to use ANY (macaddr[]) and without CTE,
which seems to be around 20x faster
031c3e6d95