wu-sheng commented on code in PR #9575:
URL: https://github.com/apache/skywalking/pull/9575#discussion_r965657789
##########
docs/en/concepts-and-designs/lal.md:
##########
@@ -240,6 +272,69 @@ metrics:
exp: http_response_time.sum(['le', 'service',
'instance']).increase('PT5M').histogram().histogram_percentile([50,70,90,99])
```
+#### SlowSql
+
+SlowSql aims to convert LogData to DatabaseSlowStatement. It extracts data
from `parsed` result and save them as DatabaseSlowStatement. SlowSql will not
abort or edit logs, you can use other LAL for further processing.
+SlowSql will reuse `service`, `layer` and `timestamp` of extractor, so it is
necessary to use `SlowSQL` after setting these.
+We need to set a log tag `"LOG_KIND" = "SLOW_SQL"` so that OAP can distinguish
slow sql logs.
+A example of JSON sent to OAP is following:
Review Comment:
```suggestion
An example of JSON sent to OAP is as following:
```
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