ns = params_kw.copy()

if not ns.get('page'):
	ns['page'] = 1
if not ns.get('sort'):
	ns['sort'] = ['prodtypeid', 'productid']

sql = '''select a.*, 
	b.name as discountid_text,
	c.name as prodtypeid_text,
	d.product_name as productid_text
from (select * from discount_detail where 1=1 [[filterstr]]) a 
left join (select id, name from discount) b on a.discountid = b.id
left join (select id, name from product_category) c on a.prodtypeid = c.id
left join (select id, product_name from product) d on a.productid = d.id'''

fields = ['discountid', 'prodtypeid', 'productid', 'discount']
filterjson = default_filterjson(fields, ns)

filterdic = ns.copy()
filterdic['filterstr'] = ''
if filterjson:
	dbf = DBFilter(filterjson)
	conds = dbf.gen(ns)
	if conds:
		ns.update(dbf.consts)
		conds = f' and {conds}'
		filterdic['filterstr'] = conds
ac = ArgsConvert('[[', ']]')
vars = ac.findAllVariables(sql)
NameSpace = {v:'${' + v + '}$' for v in vars if v != 'filterstr'}
filterdic.update(NameSpace)
sql = ac.convert(sql, filterdic)

debug(f'{sql=}')
db = DBPools()
dbname = get_module_dbname('discount')
async with db.sqlorContext(dbname) as sor:
	r = await sor.sqlPaging(sql, ns)
	return r
return {
	"total": 0,
	"rows": []
}