GitHub user arina-ielchiieva opened a pull request:
https://github.com/apache/drill/pull/842
DRILL-5523: Revert if condition in UnionAllRecordBatch changed in DRIâ¦
â¦LL-5419
If condition in UnionAllRecordBatch which was changed to correct one in
DRILL-5419 but this change caused the regression (DRILL-5521).
The root cause is not in change itself but rather in missing indication of
child column in map types when it is null. There is a big project upcoming
re-working json reader implementation, including map types (DRILL-4824) which
will fix the problem.
So far reverting change to initial state so users won't see the regression
till DRILL-4824 is merged.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/arina-ielchiieva/drill DRILL-5523
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/drill/pull/842.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 #842
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