[ https://issues.apache.org/jira/browse/LENS-1471?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Rajat Khandelwal updated LENS-1471: ----------------------------------- Fix Version/s: 2.8 > JoinCandidate's children should not share same instance of a 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 > Fix For: 2.8 > > Attachments: LENS-1471.01.patch, LENS-1471.02.patch, > LENS-1471.03.patch > > > 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 {{retain}} 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)