fix: nullish check and table name

erpnext/manufacturing/doctype/bom/bom.py

@@ -753,7 +753,7 @@ class BOM(WebsiteGenerator):
 				bom_item.include_item_in_manufacturing,
 				bom_item.sourced_by_supplier,
 				bom_item.stock_qty / ifnull(bom.quantity, 1) AS qty_consumed_per_unit
-			FROM `tabBOM Explosion Item` bom_item, tabBOM bom
+			FROM `tabBOM Explosion Item` bom_item, `tabBOM` bom
 			WHERE
 				bom_item.parent = bom.name
 				AND bom.name = %s

erpnext/stock/doctype/item_price/item_price.py

@@ -64,7 +64,7 @@ class ItemPrice(Document):
 			if self.get(field):
 				conditions += " and {0} = %({0})s ".format(field)
 			else:
-				conditions += "and (isnull({0}) or {0} = '')".format(field)
+				conditions += "and ({0} is null or {0} = '')".format(field)
 
 		price_list_rate = frappe.db.sql(
 			"""