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https://issues.apache.org/jira/browse/ARROW-1329?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16912467#comment-16912467
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Wes McKinney commented on ARROW-1329:
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I'll address this issue as part of the "Data Frame" project. I think that's the
correct place to deal with late materialization / virtual columns, etc.
> [C++] Define "virtual table" interface
> --------------------------------------
>
> Key: ARROW-1329
> URL: https://issues.apache.org/jira/browse/ARROW-1329
> Project: Apache Arrow
> Issue Type: New Feature
> Components: C++
> Reporter: Wes McKinney
> Assignee: Wes McKinney
> Priority: Major
> Labels: dataframe
>
> The idea is that a virtual table may reference Arrow data that is not yet
> available in memory. The implementation will define the semantics of how
> columns are loaded into memory.
> A virtual column interface will need to accompany this. For example:
> {code:language=c++}
> std::shared_ptr<VirtualTable> vtable = ...;
> std::shared_ptr<VirtualColumn> vcolumn = vtable->column(i);
> std::shared_ptr<Column> = vcolumn->Materialize();
> std::shared_ptr<Table> = vtable->Materialize();
> {code}
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