GitHub user wangyum opened a pull request:
https://github.com/apache/spark/pull/21641
[SPARK-24658][SQL] Remove workaround for ANTLR bug
## What changes were proposed in this pull request?
Issue antlr/antlr4#781 has already been fixed, so the workaround of
extracting the pattern into a separate rule is no longer needed. The presto
already removed it: https://github.com/prestodb/presto/pull/10744.
## How was this patch tested?
Existing tests
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/wangyum/spark ANTLR-780
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/21641.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 #21641
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commit e9a1b2cadbbd8dc34671c2051ee6ddfd5f637709
Author: Yuming Wang <yumwang@...>
Date: 2018-06-26T05:18:17Z
Remove workaround for ANTLR bug
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