-- Références OT/DEM/BC/P : séquences Postgres — la concurrence ne peut plus
-- produire de collision (leçon des générations parallèles).
-- La numérotation ne se remet pas à zéro chaque année : l'unicité prime.
CREATE SEQUENCE IF NOT EXISTS "work_order_ref_seq";
CREATE SEQUENCE IF NOT EXISTS "request_ref_seq";
CREATE SEQUENCE IF NOT EXISTS "purchase_order_ref_seq";
CREATE SEQUENCE IF NOT EXISTS "part_ref_seq";

SELECT setval('work_order_ref_seq',
  GREATEST((SELECT COALESCE(MAX(SUBSTRING("reference" FROM '\d+$')::int), 0) FROM "WorkOrder"), 1000));
SELECT setval('request_ref_seq',
  GREATEST((SELECT COALESCE(MAX(SUBSTRING("reference" FROM '\d+$')::int), 0) FROM "Request"), 1000));
SELECT setval('purchase_order_ref_seq',
  GREATEST((SELECT COALESCE(MAX(SUBSTRING("reference" FROM '\d+$')::int), 0) FROM "PurchaseOrder"), 1000));
SELECT setval('part_ref_seq',
  GREATEST((SELECT COALESCE(MAX(SUBSTRING("reference" FROM '\d+$')::int), 0) FROM "Part"), 1000));