[IMP] core: optimize read() by avoiding useless query

When the `select` returns nothing more than ids that are already known, there is
no need to make it at all.

This removes one query from `_read` every time it has to fetch only fields that
are stored in a different table (o2m, ...), which happens all the time when
reading a stored field first (triggering prefetch) and then reading a o2m.

The query that is now removed was used to check access rules, but the trick is
to use `check_access_rule` to verify the rules in python instead.

Part of task-2061122

closes odoo/odoo#36263

Signed-off-by: Sébastien Theys (seb) <seb@odoo.com>

0 files changed, 0 insertions, 0 deletions