@Override
    public Table getTable(String dbName, String tblName) {
        if (!DEFAULT_DB.equalsIgnoreCase(dbName)) {
            return null;
        }
        return toEsTable(esRestClient, properties, tblName, dbName, catalogName);
    }
@Test
    public void testGetTable(@Mocked EsRestClient client) {
        ElasticsearchMetadata metadata = new ElasticsearchMetadata(client, new HashMap<>(), "catalog");
        Assert.assertNull(metadata.getTable("default_db", "not_exist_index"));
        Assert.assertNull(metadata.getTable("aaaa", "tbl"));
    }