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Posted to issues@spark.apache.org by "Davies Liu (JIRA)" <ji...@apache.org> on 2016/01/20 00:15:39 UTC

[jira] [Created] (SPARK-12913) Reimplement all builtin aggregate functions as declarative function

Davies Liu created SPARK-12913:
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             Summary: Reimplement all builtin aggregate functions as declarative function
                 Key: SPARK-12913
                 URL: https://issues.apache.org/jira/browse/SPARK-12913
             Project: Spark
          Issue Type: Improvement
          Components: SQL
            Reporter: Davies Liu


As benchmarked and discussed here: https://github.com/apache/spark/pull/10786/files#r50038294.

Benefits from codegen, the declarative aggregate function could be much faster than imperative one,  we should re-implement all the builtin aggregate functions as declarative one.



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