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Posted to issues@drill.apache.org by "Paul Rogers (JIRA)" <ji...@apache.org> on 2019/07/01 01:21:00 UTC

[jira] [Created] (DRILL-7311) Partial fixes for empty batch bugs

Paul Rogers created DRILL-7311:
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             Summary: 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
             Fix For: 1.17.0


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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