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https://issues.apache.org/jira/browse/ARROW-8210?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Joris Van den Bossche updated ARROW-8210:
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Description:
While testing duplicate column names, I ran into multiple issues:
* Factory fails if there are duplicate columns, even for a single file
* In addition, we should also fix and/or test that factory works for duplicate
columns if the schema's are equal
* Once a Dataset with duplicated columns is created, scanning without any
column projection fails
> [C++][Dataset] Handling of duplicate columns in Dataset factory and scanning
> ----------------------------------------------------------------------------
>
> Key: ARROW-8210
> URL: https://issues.apache.org/jira/browse/ARROW-8210
> Project: Apache Arrow
> Issue Type: Bug
> Components: C++, C++ - Dataset
> Reporter: Joris Van den Bossche
> Priority: Major
>
> While testing duplicate column names, I ran into multiple issues:
> * Factory fails if there are duplicate columns, even for a single file
> * In addition, we should also fix and/or test that factory works for
> duplicate columns if the schema's are equal
> * Once a Dataset with duplicated columns is created, scanning without any
> column projection fails
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