Skye Wanderman-Milne 039bd44fdf IMPALA-2688: decimal codegen support in aggregations ...

This patch implements codegen support for aggregations with decimal
input and intermediate type. For the following benchmark query:

SELECT l_discount, count(*) AS cnt
FROM biglineitem
GROUP BY l_discount
HAVING cnt > 9999999999999

Query time went from 8.85s to 3.74s (2.4x faster).

Change-Id: I25934fcd6324e5bf1fa6859496107bf2ec68b8d3
Reviewed-on: http://gerrit.cloudera.org:8080/2050
Reviewed-by: Skye Wanderman-Milne <skye@cloudera.com>
Tested-by: Internal Jenkins

2016-02-11 02:32:22 +00:00

11 KiB

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