[ https://issues.apache.org/jira/browse/KYLIN-3797?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
nichunen reopened KYLIN-3797: ----------------------------- > Too many or filters may break Kylin server when flatting filter > --------------------------------------------------------------- > > Key: KYLIN-3797 > URL: https://issues.apache.org/jira/browse/KYLIN-3797 > Project: Kylin > Issue Type: Improvement > Components: Query Engine > Reporter: Gang Ma > Assignee: Gang Ma > Priority: Major > Fix For: v3.0.0-alpha > > > Kylin needs to convert filter into a flat format, like: OR(AND(f1,f2), > AND(f3,f4,f5)…) , so that Kylin can build HBase scan/filter accordingly, but > when there are too many or filters in query, like: AND(OR(f1,f2,...,f1000), > OR(g1,g2,...,g1000), OR(h1,h2,...,h1000)), then the generated flat filter > size will be 1000*1000*1000=1 billion, the flatting process will cause Kylin > server OOM. -- This message was sent by Atlassian Jira (v8.3.4#803005)