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  1. Apache Drill
  2. DRILL-7306

Disable "fast schema" batch for new scan framework

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    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 1.16.0
    • Fix Version/s: 1.17.0
    • Component/s: None
    • Labels:
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      Description

      The EVF framework is set up to return a "fast schema" empty batch with only schema as its first batch because, when the code was written, it seemed that's how we wanted operators to work. However, DRILL-7305 notes that many operators cannot handle empty batches.

      Since the empty-batch bugs show that Drill does not, in fact, provide a "fast schema" batch, this ticket asks to disable the feature in the new scan framework. The feature is disabled with a config option; it can be re-enabled if ever it is needed.

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              • Assignee:
                Paul.Rogers Paul Rogers
                Reporter:
                Paul.Rogers Paul Rogers
                Reviewer:
                Arina Ielchiieva
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                • Created:
                  Updated:
                  Resolved: