Vibhatha Lakmal Abeykoon created ARROW-17622:
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Summary: [C++] Order-aware non-sink Fetch Node
Key: ARROW-17622
URL: https://issues.apache.org/jira/browse/ARROW-17622
Project: Apache Arrow
Issue Type: Improvement
Components: C++
Reporter: Vibhatha Lakmal Abeykoon
Assignee: Vibhatha Lakmal Abeykoon
Considering the existing sink nodes and newly introduced Fetch node with sort
capability, we will only need two nodes, "sort", and "fetch" in the long run.
Because once the ordered execution is integrated, some features could be
removed. Right now, there are three nodes doing somewhat closely related things
which is redundant work assuming unordered execution. Namely they are,
"order_by_sink", "fetch_sink", and "select_k_sink". So one of them will need to
go away at some point and all of them will no longer be sink nodes and sorting
behavior will need to be removed from "fetch".
The task breakdown needs to be determined. Better to keep a few sub-tasks.
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