use sql.Null

Author: methane

Diff for: fields.go

@@ -128,7 +128,7 @@ var (
 	scanTypeInt64      = reflect.TypeOf(int64(0))
 	scanTypeNullFloat  = reflect.TypeOf(sql.NullFloat64{})
 	scanTypeNullInt    = reflect.TypeOf(sql.NullInt64{})
-	scanTypeNullUint   = reflect.TypeOf(sql.NullString{}) // reflect.TypeOf(sql.Null[uint64]{}) // support in go 1.22
+	scanTypeNullUint   = reflect.TypeOf(sql.Null[uint64]{})
 	scanTypeNullTime   = reflect.TypeOf(sql.NullTime{})
 	scanTypeUint8      = reflect.TypeOf(uint8(0))
 	scanTypeUint16     = reflect.TypeOf(uint16(0))