avoid bigint converted into float64 when unmarshaling

core/stores/sqlc/cachedsql.go

@@ -83,10 +83,6 @@ func (cc CachedConn) QueryRowIndex(v interface{}, key string, keyer func(primary
 	var primaryKey interface{}
 	var found bool
 
-	// if don't use convert numeric primary key into int64,
-	// then it will be represented as scientific notion, like 2e6
-	// which will make the cache doesn't match with the previous insert one
-	keyer = floatKeyer(keyer)
 	if err := cc.cache.TakeWithExpire(&primaryKey, key, func(val interface{}, expire time.Duration) (err error) {
 		primaryKey, err = indexQuery(cc.db, v)
 		if err != nil {
@@ -124,16 +120,3 @@ func (cc CachedConn) SetCache(key string, v interface{}) error {
 func (cc CachedConn) Transact(fn func(sqlx.Session) error) error {
 	return cc.db.Transact(fn)
 }
-
-func floatKeyer(fn func(interface{}) string) func(interface{}) string {
-	return func(primary interface{}) string {
-		switch v := primary.(type) {
-		case float32:
-			return fn(int64(v))
-		case float64:
-			return fn(int64(v))
-		default:
-			return fn(primary)
-		}
-	}
-}