Aman Sinha created DRILL-2900: --------------------------------- Summary: Joins are not getting parallelized in TestTpchDistributed unit tests Key: DRILL-2900 URL: https://issues.apache.org/jira/browse/DRILL-2900 Project: Apache Drill Issue Type: Bug Components: Query Planning & Optimization Affects Versions: 0.8.0 Reporter: Aman Sinha Assignee: Jinfeng Ni
The suite of unit tests in org.apache.drill.TestTpchDistributed are supposed to have parallel joins, parallel aggregations and sort. In order to force parallelism, the slice_target value is set to 10 (default is 100K). However, it looks like the plans of at least a few queries that I tried (query 03, 05, 14) did not have parallelism for the hash joins. The aggregations and sort do have Exchanges, so they are getting parallelized. There is a likelihood that many plans have BroadcastExchange on the right input of the join and since the left input of the join is typically a single file we may be dropping the exchange on the right input. This should be fixed. -- This message was sent by Atlassian JIRA (v6.3.4#6332)