[ https://issues.apache.org/jira/browse/KYLIN-3359?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17192167#comment-17192167 ]
Zhong Yanghong commented on KYLIN-3359: --------------------------------------- Hi [~mzz_q], please see [KYLIN-4620]. If you want to enable sum(expression), you need to set *kylin.query.is-null-as-zero-in-expression* to be true at project level > Support sum(expression) if possible > ----------------------------------- > > Key: KYLIN-3359 > URL: https://issues.apache.org/jira/browse/KYLIN-3359 > Project: Kylin > Issue Type: Sub-task > Components: Query Engine > Reporter: Zhong Yanghong > Assignee: Zhong Yanghong > Priority: Major > Fix For: v2.4.0 > > Attachments: KYLIN-3359-Hive-query.png, KYLIN-3359-Kylin-query.png > > > The expression can be as follows: > # a ~1~*col ~1~ + a ~2~*col ~2~ + ... + a ~n~*col ~n~ + b, if sum(col > ~1~),sum(col ~2~),...sum(col ~n~) are defined > # case when {{filter}} ~1~ then expr ~1~ > when {{filter}} ~2~ then expr ~2~ > ... > else expr ~N~ > end, if {{filter}} ~1~,{{filter}} ~2~, ... {{filter}} ~N-1~, and expr > ~1~,expr ~2~,...expr ~N~ are supported > There's a constraint for the filter. That is it's able to push down the > related filters in case when. -- This message was sent by Atlassian Jira (v8.3.4#803005)