GitHub user cloud-fan opened a pull request:
https://github.com/apache/spark/pull/20485
[SPARK-23315][SQL] failed to get output from canonicalized data source v2
related plans
## What changes were proposed in this pull request?
`DataSourceV2Relation` keeps a `fullOutput` and resolves the real output
on demand by column name lookup. This will be broken after we canonicalize the
plan, because all attribute names become "None".
To fix this, `DataSourceV2Relation` should just keep `output`, and update
the `output` when doing column pruning.
## How was this patch tested?
a new test case
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/cloud-fan/spark canonicalize
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/20485.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 #20485
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commit 75950a1725f01c31764ac31d16acd6e2078956c6
Author: Wenchen Fan <wenchen@...>
Date: 2018-02-02T07:53:07Z
failed to get output from canonicalized data source v2 related plans
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