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 ---- commit de54ec7faa1365e044f7b34971135c52efa00255 Author: ravipesala <ravi.pesala@...> Date: 2018-12-31T11:50:24Z Fix schema refresh issues in presto. ---- ---