GitHub user gatorsmile opened a pull request:
https://github.com/apache/spark/pull/21147
[SPARK-23799][SQL][FOLLOW-UP] FilterEstimation.evaluateInSet produces wrong
stats for STRING
## What changes were proposed in this pull request?
`colStat.min` AND `colStat.max` are empty for string type. Thus,
`evaluateInSet` should not return zero when either `colStat.min` or
`colStat.max`.
## How was this patch tested?
Added a test case.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/gatorsmile/spark cached
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/21147.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 #21147
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commit 9672f92dde505eada20d8102dcd845a5418d37c8
Author: gatorsmile <gatorsmile@...>
Date: 2018-04-25T03:59:46Z
fix
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