jackylk opened a new pull request #3424: [CARBONDATA-3559] Support adding carbon files into CarbonData table
URL:
https://github.com/apache/carbondata/pull/3424
Since adding parquet/orc files into CarbonData table are supported now, adding carbon files should be supported as well
This PR supports usage as below:
```
CREATE TABLE source (
userId string,
message string
) USING carbon/parquet/orc;
# bulk loading into source table for many times
INSERT INTO source ...
INSERT INTO source ...
CREATE TABLE target (
userId string,
message string
) USING carbondata;
# bulk loading into target table, creating internal segments
INSERT INTO target ...
INSERT INTO target ...
# add files from source table as external segments to target table
ALTER TABLE target ADD SEGMENT
OPTIONS (path='path_to_files', format='carbon/parquet/orc');
# query target table will read files from both internal segment and external segment
SELECT * FROM target;
```
- [ ] Any interfaces changed?
- [ ] Any backward compatibility impacted?
- [ ] Document update required?
- [ ] Testing done
Please provide details on
- Whether new unit test cases have been added or why no new tests are required?
- How it is tested? Please attach test report.
- Is it a performance related change? Please attach the performance test report.
- Any additional information to help reviewers in testing this change.
- [ ] For large changes, please consider breaking it into sub-tasks under an umbrella JIRA.
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