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https://issues.apache.org/jira/browse/DRILL-7311?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Paul Rogers resolved DRILL-7311.
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Resolution: Duplicate
> Partial fixes for empty batch bugs
> ----------------------------------
>
> Key: DRILL-7311
> URL: https://issues.apache.org/jira/browse/DRILL-7311
> Project: Apache Drill
> Issue Type: Bug
> Affects Versions: 1.16.0
> Reporter: Paul Rogers
> Assignee: Paul Rogers
> Priority: Major
> Fix For: 1.18.0
>
>
> DRILL-7305 explains that multiple operators have serious bugs when presented
> with empty batches. DRILL-7306 explains that the EVF (AKA "new scan
> framework") was originally coded to emit an empty "fast schema" batch, but
> that the feature was disabled because of the many empty-batch operator
> failures.
> This ticket covers a set of partial fixes for empty-batch issues. This is the
> result of work done to get the converted JSON reader to work with a "fast
> schema." The JSON work, in the end, revealed that Drill has too many bugs to
> enable fast schema, and so the DRILL-7306 was implemented instead.
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