Use UNION ALL instead of UNION to let PostgreSQL
filter out rows before sorting and avoid Unique check.
Note that it shouldn't change the result because each 3 SELECT
doesn't have domain intersection.
Improve performance the `_get_orderpoint_action` and the Forecasted
Inventory.
Performance Gain:
With a large Database (5K products, 120K stock move, 20K quants, etc):
To open the Forecasted Inventory:
Before: 10.06 sec +- 0.02
After: 3.98 sec +- 0.07
task-2390516
X-original-commit: 0a89bc231aaadee959deb6cda4aa09318b08f591
Rémy Voet (ryv)
6ce3807918