gianm commented on a change in pull request #6094: Introduce SystemSchema tables (#5989) URL: https://github.com/apache/incubator-druid/pull/6094#discussion_r207922200
########## File path: docs/content/querying/sql.md ########## @@ -481,6 +485,77 @@ SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_SCHEMA = 'druid' AND TABLE_ |COLLATION_NAME|| |JDBC_TYPE|Type code from java.sql.Types (Druid extension)| +## SYSTEM SCHEMA + +SYSTEM_TABLES provide visibility into the druid segments, servers and tasks. +For example to retrieve all segments for datasource "wikipedia", use the query: +```sql +select * from SYS.SEGMENTS where DATASOURCE='wikipedia'; Review comment: Lowercase seems more Druid-y, so I think I'd prefer `SELECT * FROM sys.segments WHERE dataSource = 'wikipedia'`. The only reason INFORMATION_SCHEMA isn't like this is because it's a standard thing and uppercase seems more normal for it from looking at other databases. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@druid.apache.org For additional commands, e-mail: commits-h...@druid.apache.org
