[ https://issues.apache.org/jira/browse/ARROW-6690?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Andy Grove resolved ARROW-6690. ------------------------------- Resolution: Fixed Issue resolved by pull request 5606 [https://github.com/apache/arrow/pull/5606] > [Rust] [DataFusion] HashAggregate without GROUP BY should use SIMD > ------------------------------------------------------------------ > > Key: ARROW-6690 > URL: https://issues.apache.org/jira/browse/ARROW-6690 > Project: Apache Arrow > Issue Type: Sub-task > Components: Rust, Rust - DataFusion > Reporter: Andy Grove > Assignee: Andy Grove > Priority: Major > Labels: pull-request-available > Fix For: 1.0.0 > > Time Spent: 40m > Remaining Estimate: 0h > > Currently the implementation of HashAggregate in the new physical plan uses > the same logic regardless of whether a grouping expression is used. > For the case where there is no grouping expression, such as "SELECT SUM(a) > FROM b" we can use the compute kernels to perform an aggregate operation on > each batch rather than iterating over each row and accumulating individual > values. > This optimization already exists in the original implementation of aggregate > queries direct from the logical plan. -- This message was sent by Atlassian Jira (v8.3.4#803005)