CREATE SPACE error in example comment

[liuxiaocs7]

In example/FlinkConnectorExample.java and example/FlinkConnectorSourceExample.java, the CREATE SPACE statement in comment is

CREATE SPACE `flinkSink` (partition_num = 100, replica_factor = 3, charset = utf8, collate = utf8_bin, vid_type = INT64, atomic_edge = false) ON default

when i execute the above statement using nebula console, the result is:

The version of nebula is 3.1.0 and is deployed by Docker.
Also i can't find the corresponding parameter description on the doc.

Should we remove on default, it seems works fine after that just as below.

(root@nebula) [(none)]> CREATE SPACE `tt` (partition_num = 100, replica_factor = 3, charset = utf8, collate = utf8_bin, vid_type = INT64, atomic_edge = false) ON default
[ERROR (-1009)]: SemanticError: Create space with zone is unsupported

Mon, 11 Jul 2022 18:26:25 CST

(root@nebula) [(none)]> CREATE SPACE `tt` (partition_num = 100, replica_factor = 3, charset = utf8, collate = utf8_bin, vid_type = INT64, atomic_edge = false)
Execution succeeded (time spent 19188/19153 us)

Mon, 11 Jul 2022 18:26:29 CST

(root@nebula) [(none)]> SHOW CREATE SPACE `tt`
+-------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Space | Create Space
                                                          |
+-------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| "tt"  | "CREATE SPACE `tt` (partition_num = 100, replica_factor = 3, charset = utf8, collate = utf8_bin, vid_type = INT64, atomic_edge = false) ON default_zone_172.28.2.1_9779,default_zone_172.28.2.2_9779,default_zone_172.28.2.3_9779" |
+-------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
Got 1 rows (time spent 732/1513 us)

Mon, 11 Jul 2022 18:26:46 CST