Liya Fan created ARROW-6306:
-------------------------------
Summary: [Java] Support stable sort by stable comparators
Key: ARROW-6306
URL: https://issues.apache.org/jira/browse/ARROW-6306
Project: Apache Arrow
Issue Type: New Feature
Components: Java
Reporter: Liya Fan
Assignee: Liya Fan
Stable sort is desirable in many scenarios. It means equal elements preserve
their relative order after sorting.
There are stable sort algorithms. However, in practice, the best sort algorithm
is quick sort and quick sort is not stable.
To make the best of both worlds, we support stable sort by stable comparators.
It differs from an ordinary comparator in that it breaks ties by comparing the
value indices.
With the stable comparator, the quick sort algorithm becomes a stable algorithm.
--
This message was sent by Atlassian Jira
(v8.3.2#803003)
