GitHub user xuchuanyin opened a pull request:
https://github.com/apache/carbondata/pull/1496
[CARBONDATA-1709][DataFrame] Support sort_columns option in dataframe writer
Be sure to do all of the following checklist to help us incorporate
your contribution quickly and easily:
- [X] Any interfaces changed?
`NO`
- [X] Any backward compatibility impacted?
`NO`
- [X] Document update required?
`NO`
- [X] Testing done
Please provide details on
- Whether new unit test cases have been added or why no new tests
are required?
`ADDED NEW TESTS`
- How it is tested? Please attach test report.
`TEST THE CORRECTNESS OF SORT_COLUMNS OPTION`
- Is it a performance related change? Please attach the performance
test report.
`NO`
- Any additional information to help reviewers in testing this
change.
`NO`
- [X] For large changes, please consider breaking it into sub-tasks under
an umbrella JIRA.
`UNRELATED`
COPY FROM JIRA
===
While creating carbondata table from dataframe, `sort_column` property is
not specified, which by default will use all string columns as `sort_column`.
So an option is required to specify it as below:
```scala
df.write
.format("carbondata")
.options(...)
.option("sort_columns", "c1,c2")
.save
```
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/xuchuanyin/carbondata opt_df_write_sort_column
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/carbondata/pull/1496.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #1496
----
commit 0ed4a13a046968be6d8da15262abfd05458bfdd8
Author: xuchuanyin <[email protected]>
Date: 2017-11-14T12:23:35Z
Support sort_columns option in dataframe writer
----
---
