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Paul Rogers updated DRILL-7305: ------------------------------- Description: While testing the new "EVF" framework, it was found that multiple operators incorrectly handle empty batches. The EVF framework is set up to return a "fast schema" empty batch with only schema as its first batch. It turns out that many operators fail with problems such as: * Failure to set the value counts in the output container * Fail to initialize the offset vector position 0 to 0 for variable-width or repeated vectors And so on. Partial fixes are in the JSON reader PR. For now, the easiest work-around is to disable the "fast schema" path in the EVF: DRILL-7306. was: While testing the new "EVF" framework, it was found that multiple operators incorrectly handle empty batches. The EVF framework is set up to return a "fast schema" empty batch with only schema as its first batch. It turns out that many operators fail with problems such as: * Failure to set the value counts in the output container * Fail to initialize the offset vector position 0 to 0 for variable-width or repeated vectors And so on. Partial fixes are in the JSON reader PR. For now, the easiest work-around is to disable the "fast schema" path in the EVF. > Multiple operators do not handle empty batches > ---------------------------------------------- > > Key: DRILL-7305 > URL: https://issues.apache.org/jira/browse/DRILL-7305 > Project: Apache Drill > Issue Type: Bug > Affects Versions: 1.16.0 > Reporter: Paul Rogers > Priority: Major > > While testing the new "EVF" framework, it was found that multiple operators > incorrectly handle empty batches. The EVF framework is set up to return a > "fast schema" empty batch with only schema as its first batch. It turns out > that many operators fail with problems such as: > * Failure to set the value counts in the output container > * Fail to initialize the offset vector position 0 to 0 for variable-width or > repeated vectors > And so on. > Partial fixes are in the JSON reader PR. > For now, the easiest work-around is to disable the "fast schema" path in the > EVF: DRILL-7306. -- This message was sent by Atlassian JIRA (v7.6.3#76005)