Ali Alsuliman created ASTERIXDB-2286:
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Summary: Parallel Sort Optimization
Key: ASTERIXDB-2286
URL: https://issues.apache.org/jira/browse/ASTERIXDB-2286
Project: Apache AsterixDB
Issue Type: Improvement
Components: COMP - Compiler, FUN - Functions, HYR - Hyracks
Reporter: Ali Alsuliman
The current plan for queries with ORDER BY clauses consists of two phases;
sorting the data locally in each partition and then sort-merging the data in
one single partition. Even though the local sort happens in parallel, this
effort is wasted by the fact that the merge is happening at one partition. It
is desired to remove the merge step and do a true parallel sort where data is
range-partitioned across the cluster.
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