[ https://issues.jboss.org/browse/TEIID-3119?page=com.atlassian.jira.plugin... ] Steven Hawkins commented on TEIID-3119: --------------------------------------- The grouping change is quite a bit more involved and will require a change the to user defined aggregate interface to work with custom functions. The basic idea is that we'll maintain a tree keyed by the ordering and expose the accumulator state to be stored along with the key. Then we'll walk the tree at the need to pull the final aggregate values. Initially we'll probably only do this in non-distinct and non-rollup scenarios - although each can be done in this manner as well with some additional effort. -- This message was sent by Atlassian JIRA (v6.3.1#6329)