func (db *PreparedStmtDB) Close() {
	db.Mux.Lock()
	defer db.Mux.Unlock()

	for _, stmt := range db.Stmts {
		go func(s *Stmt) {
			// make sure the stmt must finish preparation first
			<-s.prepared
			if s.Stmt != nil {
				_ = s.Close()
			}
		}(stmt)
	}
	// setting db.Stmts to nil to avoid further using
	db.Stmts = nil
}

func (sdb *PreparedStmtDB) Reset() {
	sdb.Mux.Lock()
	defer sdb.Mux.Unlock()

			var result User
			tx.First(&result)
			wg.Done()
		}()
	}
	wg.Wait()

	conn, ok := tx.ConnPool.(*gorm.PreparedStmtDB)
	AssertEqual(t, ok, true)
	AssertEqual(t, len(conn.Stmts), 2)
	for _, stmt := range conn.Stmts {
		if stmt == nil {
			t.Fatalf("stmt cannot bee nil")
		}
	}

	AssertEqual(t, sqlDB.Stats().InUse, 0)
}

func TestPreparedStmtInTransaction(t *testing.T) {

				Tx:             t,
				PreparedStmtDB: preparedStmt,
			}
		default:
			tx.Statement.ConnPool = &PreparedStmtDB{
				ConnPool: db.Config.ConnPool,
				Mux:      preparedStmt.Mux,
				Stmts:    preparedStmt.Stmts,
			}
		}
		txConfig.ConnPool = tx.Statement.ConnPool
		txConfig.PrepareStmt = true
	}

	if config.SkipHooks {
		tx.Statement.SkipHooks = true
	}