[FIX] mrp: installation on very large inventories

Before this commit, installation of MRP in a database with 4.8M
stock.move + 4.8M stock.move.line was not possible at all.
The process lasted for a very long time (>90 min in our tests) then
eventually failed after using the whole RAM of your server.

This commit allows installing MRP in databases with large stock.move /
stock.move.line tables by bootstrapping the slow parts in SQL.

A more general fix regarding the time complexity of some parts of the
prefetching algorithm is coming later in 13.0-init-computed-fields-rco

opw-2281585

X-original-commit: 549de5601efdad3ebdb03feb8beb1e898f80113a

addons/mrp/__init__.py

@@ -8,6 +8,18 @@ from . import controller
 
 from odoo import api, SUPERUSER_ID
 
+
+def _pre_init_mrp(cr):
+    """ Allow installing MRP in databases with large stock.move table (>1M records)
+        - Creating the computed+stored field stock_move.is_done is terribly slow with the ORM and
+          leads to "Out of Memory" crashes
+    """
+    cr.execute("""ALTER TABLE "stock_move" ADD COLUMN "is_done" bool;""")
+    cr.execute("""UPDATE stock_move
+                     SET is_done=TRUE
+                   WHERE STATE='done'
+                      OR STATE='cancel';""")
+
 def _create_warehouse_data(cr, registry):
     """ This hook is used to add a default manufacture_pull_id, manufacture
     picking_type on every warehouse. It is necessary if the mrp module is

addons/mrp/__manifest__.py

@@ -52,6 +52,7 @@
     ],
     'test': [],
     'application': True,
+    'pre_init_hook': '_pre_init_mrp',
     'post_init_hook': '_create_warehouse_data',
     'uninstall_hook': 'uninstall_hook',
 }