QUERY PLAN
Delete on tbl_erp_inventory_product_sns (cost=0.00..1.81 rows=1 width=6)
-> Seq Scan on tbl_erp_inventory_product_sns (cost=0.00..1.81 rows=1 width=6)
Filter: ((erp_purchase_inbound_product_sn_id <> 39) AND (erp_inventory_product_id = 493))