Paul Rogers created DRILL-7306:
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Summary: Disable "fast schema" batch for new scan framework
Key: DRILL-7306
URL: https://issues.apache.org/jira/browse/DRILL-7306
Project: Apache Drill
Issue Type: Bug
Affects Versions: 1.16.0
Reporter: Paul Rogers
Assignee: Paul Rogers
Fix For: 1.17.0
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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