sandynz commented on issue #14661:
URL:
https://github.com/apache/shardingsphere/issues/14661#issuecomment-1011790808
The design and implementation cost a short time, since scaling require
DistSQL in `5.1.0` release recently. Thank you very much! @RaigorJiang
I've tested all the `CREATE` examples above, every one of them works. I just
did more test now, and I found some situation:
1. Looks there're strict constraints.
Empty scaling configuration is allowed, it means `INPUT`, `OUTPUT`,
`STREAM_CHANNEL`, `COMPLETION_DETECTOR` and `DATA_CONSISTENCY_CHECKER` are
optional.
Seems they're not optional for now, in `minimal automatic process`,
`complete automatic process` and `manual process`.
When any of them are not configured, it show error message. e.g.
```
mysql> CREATE SHARDING SCALING scaling_name1(
-> COMPLETION_DETECTOR(TYPE(NAME=IDLE,
PROPERTIES("incremental-task-idle-minute-threshold"=30)))
-> );
ERROR 1235 (42000): This version of ShardingSphere-Proxy doesn't yet support
this SQL. 'You have an error in your SQL syntax'
```
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