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https://issues.apache.org/jira/browse/DRILL-5348?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16789555#comment-16789555
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Arina Ielchiieva commented on DRILL-5348:
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Upgraded to 4.7.1 in 1.15.
> Upgrade ANTLR to 4.6
> --------------------
>
> Key: DRILL-5348
> URL: https://issues.apache.org/jira/browse/DRILL-5348
> Project: Apache Drill
> Issue Type: Improvement
> Reporter: Aditya Kishore
> Assignee: Aditya Kishore
> Priority: Major
>
> Version 4.6 or ANTLR was
> [released|https://github.com/antlr/antlr4/releases/tag/4.6] on Dec 15, 2016
> and included tons of bug fixes and performance improvements.
> See: https://github.com/antlr/antlr4/releases/tag/4.6
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