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https://issues.apache.org/jira/browse/DRILL-2604?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14384205#comment-14384205
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Daniel Barclay (Drill) commented on DRILL-2604:
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Don't forget to check what the SQL specification says.
(I think I saw that it says that implicit cast rules are
implementation-defined, but there could be some requirement or prohibitions.)
> Make sure implicit casting rules are the same across drill
> ----------------------------------------------------------
>
> Key: DRILL-2604
> URL: https://issues.apache.org/jira/browse/DRILL-2604
> Project: Apache Drill
> Issue Type: Improvement
> Components: Execution - Data Types
> Affects Versions: 0.8.0
> Reporter: Victoria Markman
> Assignee: Daniel Barclay (Drill)
> Fix For: 1.1.0
>
>
> This is an enhancement request to standartize rules of implicit cast.
> It would be nice if rules in joins, set operations and functions where the
> same.
> Number of inconistencies have been found and reported under:
> drill-2549 - Implicit Cast between integer and varchar columns in a join
> should work
> drill-2433 - Implicit cast between date and timestamp is missing in joins
> We agreed that this is not 1.0 item and above mentioned bugs will not be
> resolved by GA
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