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https://issues.apache.org/jira/browse/DRILL-3232?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14969616#comment-14969616
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Steven Phillips commented on DRILL-3232:
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Design document: https://gist.github.com/StevenMPhillips/41b4a1bd745943d508d2
> Modify existing vectors to allow type promotion
> -----------------------------------------------
>
> Key: DRILL-3232
> URL: https://issues.apache.org/jira/browse/DRILL-3232
> Project: Apache Drill
> Issue Type: Sub-task
> Components: Execution - Codegen, Execution - Data Types, Execution -
> Relational Operators, Functions - Drill
> Reporter: Steven Phillips
> Assignee: Hanifi Gunes
> Fix For: 1.3.0
>
>
> Support the ability for existing vectors to be promoted similar to supported
> implicit casting rules.
> For example:
> INT > DOUBLE > STRING > EMBEDDED
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