sandynz commented on pull request #14842:
URL: https://github.com/apache/shardingsphere/pull/14842#issuecomment-1015041782
More syntax found in `RQLStatement.g4`:
```
showShardingScalingRules
: SHOW SHARDING SCALING RULES (FROM schemaName)?
;
```
Test result:
```
mysql> SHOW SHARDING SCALING RULES FROM scaling_db;
+-----------------+--------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------+-----------------------------------------------------+----------------------------------------------------------------------+---------------------------------------------------+
| name | input
| output
| stream_channel
| completion_detector
| data_consistency_checker |
+-----------------+--------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------+-----------------------------------------------------+----------------------------------------------------------------------+---------------------------------------------------+
| default_scaling |
{"workerThread":40,"batchSize":1000,"rateLimiter":{"type":"QPS","props":{"qps":50}}}
|
{"workerThread":40,"batchSize":1000,"rateLimiter":{"type":"TPS","props":{"tps":2000}}}
| {"type":"MEMORY","props":{"block-queue-size":1000}} |
{"type":"IDLE","props":{"incremental-task-idle-minute-threshold":1}} |
{"type":"DATA_MATCH","props":{"chunk-size":1000}} |
+-----------------+--------------------------------------------------------------------------------------+----------------------------------------------------------------------------------------+-----------------------------------------------------+----------------------------------------------------------------------+---------------------------------------------------+
1 row in set (0.01 sec)
```
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