feat: support redis getdel command (#4709)

Author: jk2K

core/stores/redis/redis.go

@@ -609,6 +609,28 @@ func (s *Redis) GetBitCtx(ctx context.Context, key string, offset int64) (int, e
 	return int(v), nil
 }
 
+// GetDel is the implementation of redis getdel command.
+// Available since: redis version 6.2.0
+func (s *Redis) GetDel(key string) (string, error) {
+	return s.GetDelCtx(context.Background(), key)
+}
+
+// GetDelCtx is the implementation of redis getdel command.
+// Available since: redis version 6.2.0
+func (s *Redis) GetDelCtx(ctx context.Context, key string) (string, error) {
+	conn, err := getRedis(s)
+	if err != nil {
+		return "", err
+	}
+
+	val, err := conn.GetDel(ctx, key).Result()
+	if errors.Is(err, red.Nil) {
+		return "", nil
+	}
+
+	return val, err
+}
+
 // GetSet is the implementation of redis getset command.
 func (s *Redis) GetSet(key, value string) (string, error) {
 	return s.GetSetCtx(context.Background(), key, value)

core/stores/redis/redis_test.go

@@ -1071,6 +1071,27 @@ func TestRedis_Set(t *testing.T) {
 	})
 }
 
+func TestRedis_GetDel(t *testing.T) {
+	t.Run("get_del", func(t *testing.T) {
+		runOnRedis(t, func(client *Redis) {
+			val, err := newRedis(client.Addr).GetDel("hello")
+			assert.Equal(t, "", val)
+			assert.Nil(t, err)
+			err = client.Set("hello", "world")
+			assert.Nil(t, err)
+			val, err = client.Get("hello")
+			assert.Nil(t, err)
+			assert.Equal(t, "world", val)
+			val, err = client.GetDel("hello")
+			assert.Nil(t, err)
+			assert.Equal(t, "world", val)
+			val, err = client.Get("hello")
+			assert.Nil(t, err)
+			assert.Equal(t, "", val)
+		})
+	})
+}
+
 func TestRedis_GetSet(t *testing.T) {
 	t.Run("set_get", func(t *testing.T) {
 		runOnRedis(t, func(client *Redis) {