Padma Penumarthy created DRILL-6126:
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Summary: Allocate memory for value vectors upfront in flatten
operator
Key: DRILL-6126
URL: https://issues.apache.org/jira/browse/DRILL-6126
Project: Apache Drill
Issue Type: Improvement
Reporter: Padma Penumarthy
Assignee: Padma Penumarthy
Fix For: 1.12.0
With recent changes to control batch size for flatten operator, we figure out
row count in the output batch based on memory. Since we know how many rows we
are going to include in the batch, we can also allocate the memory needed
upfront instead of starting with initial value (4096) and doubling, copying
every time we need more.
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