@Override
    public ResultSet getTableTypes() throws SQLException {
        return createDatabaseMetaDataResultSet(getDatabaseMetaData().getTableTypes());
    }
@Test
    void assertGetTableTypes() throws SQLException {
        when(databaseMetaData.getTableTypes()).thenReturn(resultSet);
        assertThat(shardingSphereDatabaseMetaData.getTableTypes(), instanceOf(DatabaseMetaDataResultSet.class));
    }