RATIONALE
Activity report is slow, as it makes a complex query inside mail.message table
which is one of our biggest table with crm.lead table, also a big table. This
activity report could be speeduped by looking only on activities, not including
discussions messages.
SOLUTION
Rationale is that discussions can be about whatever (real discussion with
customers but also internal discussion, notes, ...). What matter here is to
report on activities like phonecalls, followup emails, meetings, ... to have
a global view of sales people activity.
SPECIFICATIONS
Remove inclusion of discussion messages in the query. Keep only activities-based
messages.
Task-3129356 (Crm: Fix activity report performances)
Part-of: odoo/odoo#112535
Thibault Delavallée
c7a03dcd65