Github user xuchuanyin commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/2554#discussion_r205042798
--- Diff: docs/datamap/bloomfilter-datamap-guide.md ---
@@ -26,7 +26,16 @@ Showing all DataMaps on this table
SHOW DATAMAP
ON TABLE main_table
```
-It will show all DataMaps created on main table.
+
+Enable Datamap
+ ```
+ SET carbon.datamap.visible.dbName.tableName.dataMapName = true
+ ```
+
+Disable Datamap
--- End diff --
Please add more description about it. Such as
```
We can disable a specific datamap during query to observe whether we can
gain performance enhancement from it. This will only take effect current
session.
```
---
