Rajat Khandelwal created LENS-1471: -------------------------------------- Summary: JoinCandidate's children should not share same storage candidate Key: LENS-1471 URL: https://issues.apache.org/jira/browse/LENS-1471 Project: Apache Lens Issue Type: Bug Components: cube Reporter: Rajat Khandelwal Assignee: Rajat Khandelwal
The issue is in Join candidates of the kind {{Join\[Union\[a,b\]; Union\[a,c\]\]}}. If the instance of {{a}} is shared in different trees of a JoinCandidate, the rewritten query will be wrong. JoinCandidate's children set exclusive measure phrase indices, and that is done via truncate method of list. So let's say union1 is answering {{\[0,1\]}} measures and union2 is answering {{\[2,3\]}} measures, and since {{\[0,1,2,3\].retain(\[0,1\]).retain(\[2,3\]) == \[\]}}, it ends up answering no measures at all -- This message was sent by Atlassian JIRA (v6.4.14#64029)