Paul Rogers created DRILL-7306: ---------------------------------- 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. -- This message was sent by Atlassian JIRA (v7.6.3#76005)