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https://issues.apache.org/jira/browse/DRILL-2538?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14533387#comment-14533387
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Hanifi Gunes commented on DRILL-2538:
-------------------------------------
DRILL-2150 partially addresses this problem for multiple projections from the
same incoming vector. As described the problem, however, is broader.
> Project's setupNewSchema() does not create the correct schema for complex
> vectors with children
> -----------------------------------------------------------------------------------------------
>
> Key: DRILL-2538
> URL: https://issues.apache.org/jira/browse/DRILL-2538
> Project: Apache Drill
> Issue Type: Bug
> Components: Execution - Data Types
> Reporter: Mehant Baid
> Assignee: Mehant Baid
> Fix For: 1.1.0
>
>
> While creating the schema for the outgoing batch in project
> (setupNewSchema()) we don't create the child vectors for the complex vectors.
> We create the children only while performing the transfer in doWork(). This
> is ok for most cases, but if we have a blocking operator before project and
> our first batch is a schema batch with no records then the transfer would not
> create the child vectors and we would propagate half baked schema downstream.
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