[jira] [Created] (KYLIN-3797) Too many or filters may break Kylin server when flatting filter

["Ma Gang (JIRA)" <ji...@apache.org>]

Ma Gang created KYLIN-3797:
------------------------------

             Summary: 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: Ma Gang
            Assignee: Ma Gang


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
(v7.6.3#76005)