Chunyang Wen created ORC-97:
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Summary: Support column name selection in ReaderOptions
Key: ORC-97
URL: https://issues.apache.org/jira/browse/ORC-97
Project: Orc
Issue Type: Improvement
Components: C++
Affects Versions: 1.2.0
Reporter: Chunyang Wen
After orc-92 patch, column id selection is supported. But actually select
sub-type by name is more useful.
In my project, we use period(.) to separate nested field names.
<s1:struct<s2:struct<int1: int>>>
we choose int1 by s1.s2.int1 which will be passed
include(std::list<std:string>).
In my implementation: first I build a map for name and column id, and then
direct the function call to includeTypes. If this is a candidate solution, I
will provide a patch for review soon.
When a sub-type is selected, all his child types should be selected also, as
O'Malley pointed out in orc-92.
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