[teiid-issues] [JBoss JIRA] (TEIID-5682) Raise aggregation to allow for join pushdown

Raise aggregation to allow for join pushdown -------------------------------------------- Key: TEIID-5682 URL: https://issues.jboss.org/browse/TEIID-5682 Project: Teiid Issue Type: Enhancement Components: Query Engine Reporter: Steven Hawkins Assignee: Steven Hawkins Priority: Major Fix For: 12.x In some plans, for example those created by odata expand see TEIID-5680, the resulting query has the form of: select tbl1-cols from tbl1 left outer join (select cols, aggregates ... from tbl2 group by cols) on (some non-aggregate predicate) If the aggregates or other intervening constructs are not able to be pushed the result will be a federated join. In most instances (where the tbl1 columns are sortable) it's possible to change this to: select tbl1-cols aggregates from tbl1 left outer join tbl1 on (...) group by tbl1-cols, cols which can allow the pushdown of the join to proceed.