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https://issues.apache.org/jira/browse/HIVE-9497?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14329746#comment-14329746
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Jason Dere commented on HIVE-9497:
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The logic in FunctionRegistry that determines implicit conversion/common type
is a bit complicated. I was thinking of replacing the logic in those methods
with lookup tables for each type, which might make it easier to see and change
the implicit/common type behavior. This might be one issue that could benefit
from that.
> Implicit conversion between Varchar and Char should result in Varchar
> ---------------------------------------------------------------------
>
> Key: HIVE-9497
> URL: https://issues.apache.org/jira/browse/HIVE-9497
> Project: Hive
> Issue Type: New Feature
> Reporter: Pavas Garg
> Labels: Hive
>
> In situations where implicit conversion happen between varchar and char, the
> result should be either varchar or char but not string.
> A string type result causes a major issue for SAS, an analytic application
> Varchar with bigger length should be the implicit conversion.
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