Github user chenliang613 commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/1907#discussion_r165394741
--- Diff: docs/data-management-on-carbondata.md ---
@@ -44,13 +44,16 @@ This tutorial is going to introduce all commands and
data operations on CarbonDa
- **Dictionary Encoding Configuration**
- Dictionary encoding is turned off for all columns by default from 1.3
onwards, you can use this command for including columns to do dictionary
encoding.
+ Dictionary encoding is turned off for all columns by default from 1.3
onwards, you can use this command for including or excluding columns to do
dictionary encoding.
Suggested use cases : do dictionary encoding for low cardinality
columns, it might help to improve data compression ratio and performance.
```
TBLPROPERTIES ('DICTIONARY_INCLUDE'='column1, column2')
+ TBLPROPERTIES ('DICTIONARY_EXCLUDE'='column1, column2')
--- End diff --
By default, all columns are DICTIONARY_EXCLUDE, no need to specify.
---
