[jira] [Updated] (ARROW-1329) [C++] Define "virtual table" interface

["Wes McKinney (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-1329?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Wes McKinney updated ARROW-1329:
--------------------------------
    Labels: dataframe  (was: )

> [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
>            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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