Quanlong Huang created ORC-450:
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Summary: [C++] Support selecting list indices without
materializing list items
Key: ORC-450
URL: https://issues.apache.org/jira/browse/ORC-450
Project: ORC
Issue Type: Improvement
Components: C++
Reporter: Quanlong Huang
As we don't have a type id for index field of list type, if we just want to get
the list indices, we have to select the type id of the whole array, which cause
unneccessary materializaion on the array item.
The offset stream is stored sperately with the content stream. We are able to
just materialize the list indices.
We may need new interfaces in RowReaderOptions to specifiy this.
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