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https://issues.apache.org/jira/browse/SPARK-22675?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xiao Li updated SPARK-22675:
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Description: PropagateTypes are called at the beginning of TypeCocercion
and then called at the end of TypeCocercion. Instead, we should call it in each
rule that could change the data types for propagating the type changes above
the parents. (was: PropagateTypes are called twice in TypeCoercion. We do not
need to call it twice. Instead, we should call it after each change on the
types. )
> Refactoring PropagateTypes in TypeCoercion
> ------------------------------------------
>
> Key: SPARK-22675
> URL: https://issues.apache.org/jira/browse/SPARK-22675
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.2.0
> Reporter: Xiao Li
> Assignee: Xiao Li
>
> PropagateTypes are called at the beginning of TypeCocercion and then called
> at the end of TypeCocercion. Instead, we should call it in each rule that
> could change the data types for propagating the type changes above the
> parents.
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