disabling referential integrity with postgresql is faster by setting session_replication_role='replica'

[joevandyk]

For large databases, this is way faster than disabling/enabling all the triggers.

set session_replication_role='replica';

[joevandyk]

Also, instead of executing the DELETE statements one by one, faster to do it in a single WITH query:

with table_1 as (delete from users), table_2 as (delete from orders) select 1