GitHub user ravipesala opened a pull request:
https://github.com/apache/carbondata/pull/3041
[WIP] Fix schema refresh and wrong query result issues in presto.
Problem:
Schema which is updated in spark is not reflecting in presto. which results
in wrong query result in presto.
Solution:
Update the schema in presto whenever the schema changed in spark. And also
override the putNulls method in all presto readers to work for null data
scenarios.
Be sure to do all of the following checklist to help us incorporate
your contribution quickly and easily:
- [ ] 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.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/ravipesala/incubator-carbondata presto-test
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/carbondata/pull/3041.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 #3041
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commit de54ec7faa1365e044f7b34971135c52efa00255
Author: ravipesala <ravi.pesala@...>
Date: 2018-12-31T11:50:24Z
Fix schema refresh issues in presto.
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