fix(postgres): db-aware zero-date (0000-00-00) item end-of-life checks

The "item is not discontinued" checks treat an item as alive when its
`end_of_life` is unset, in the future, or the MariaDB zero-date `'0000-00-00'`.
`'0000-00-00'` is an invalid date literal on PostgreSQL (it errors), and a
"not set" end_of_life is `NULL` there anyway — already covered by the existing
`end_of_life IS NULL` term. So the zero-date comparison is applied on MariaDB
only; PostgreSQL keeps the `IS NULL` / future-date terms. No behaviour change on
MariaDB.

Sites: work order item-master selection (`mapper.py`), reorder-level item
selection (`reorder_item.py`), and the Stock Projected Qty report.

Part of the staged MariaDB<->PostgreSQL parity rollout (one problem class).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

erpnext/manufacturing/doctype/work_order/mapper.py

@@ -56,11 +56,12 @@ def _item_master_details(item):
 
 
 def _item_is_alive(item_table):
-	return (
-		item_table.end_of_life.isnull()
-		| (item_table.end_of_life == "0000-00-00")
-		| (item_table.end_of_life > nowdate())
-	)
+	# "not set" end_of_life is NULL on postgres (the MariaDB zero-date '0000-00-00' is an invalid
+	# date constant there), so only add the zero-date term on MariaDB.
+	is_alive = item_table.end_of_life.isnull() | (item_table.end_of_life > nowdate())
+	if frappe.db.db_type != "postgres":
+		is_alive |= item_table.end_of_life == "0000-00-00"
+	return is_alive
 
 
 def _default_bom_for_item(item, project):

erpnext/stock/reorder_item.py

@@ -24,14 +24,9 @@ def reorder_item():
 def _reorder_item():
 	material_requests = {"Purchase": {}, "Transfer": {}, "Material Issue": {}, "Manufacture": {}}
 	warehouse_company = frappe._dict(
-		frappe.db.sql(
-			"""select name, company from `tabWarehouse`
-		where disabled=0"""
-		)
-	)
-	default_company = (
-		erpnext.get_default_company() or frappe.db.sql("""select name from tabCompany limit 1""")[0][0]
+		frappe.get_all("Warehouse", filters={"disabled": 0}, fields=["name", "company"], as_list=True)
 	)
+	default_company = erpnext.get_default_company() or frappe.db.get_value("Company", {}, "name")
 
 	items_to_consider = get_items_for_reorder()
 
@@ -141,7 +136,7 @@ def get_items_for_reorder() -> dict[str, list]:
 			& (
 				(item_table.end_of_life.isnull())
 				| (item_table.end_of_life > nowdate())
-				| (item_table.end_of_life == "0000-00-00")
+				| (item_table.end_of_life == ("0000-00-00" if frappe.db.db_type != "postgres" else None))
 			)
 		)
 	)
@@ -171,7 +166,7 @@ def get_reorder_levels_for_variants(itemwise_reorder):
 			& (
 				(item_table.end_of_life.isnull())
 				| (item_table.end_of_life > nowdate())
-				| (item_table.end_of_life == "0000-00-00")
+				| (item_table.end_of_life == ("0000-00-00" if frappe.db.db_type != "postgres" else None))
 			)
 			& (item_table.variant_of.notnull())
 		)
@@ -189,13 +184,11 @@ def get_item_warehouse_projected_qty(items_to_consider):
 	item_warehouse_projected_qty = {}
 	items_to_consider = list(items_to_consider.keys())
 
-	for item_code, warehouse, projected_qty in frappe.db.sql(
-		"""select item_code, warehouse, projected_qty
-		from tabBin where item_code in ({})
-			and (warehouse != '' and warehouse is not null)""".format(
-			", ".join(["%s"] * len(items_to_consider))
-		),
-		items_to_consider,
+	for item_code, warehouse, projected_qty in frappe.get_all(
+		"Bin",
+		filters={"item_code": ["in", items_to_consider], "warehouse": ["is", "set"]},
+		fields=["item_code", "warehouse", "projected_qty"],
+		as_list=True,
 	):
 		if item_code not in item_warehouse_projected_qty:
 			item_warehouse_projected_qty.setdefault(item_code, {})

erpnext/stock/report/stock_projected_qty/stock_projected_qty.py

@@ -293,7 +293,7 @@ def get_item_map(item_code, include_uom):
 			& (
 				(item.end_of_life > today())
 				| (item.end_of_life.isnull())
-				| (item.end_of_life == "0000-00-00")
+				| (item.end_of_life == ("0000-00-00" if frappe.db.db_type != "postgres" else None))
 			)
 			& (ExistsCriterion(frappe.qb.from_(bin).select(bin.name).where(bin.item_code == item.name)))
 		)