fengYu created KYLIN-1480: ----------------------------- Summary: NPE throws while execute sql with more than two join. Key: KYLIN-1480 URL: https://issues.apache.org/jira/browse/KYLIN-1480 Project: Kylin Issue Type: Bug Components: Query Engine Affects Versions: v1.0, v1.1, v1.2, v2.0 Reporter: fengYu Assignee: liyang
Hi, I encounter NPE while execute sql more than two join, for example : select A.type, A.cmd, count(1) from fact as A inner join (select type, count(1) from fact group by type having count(1) > 2) as B on A.type = B.type inner join (select cmd, count(1) from fact group by cmd having count(1) > 2) as C on A.cmd = C.cmd group by A.type, A.cmd; the fact table is create like this : CREATE TABLE `fact`( `fname` string, `lname` string, `dt` date, `cost` int, `type` string, `cmd` string); Kylin throws exception like this : Caused by: java.lang.NullPointerException at org.apache.kylin.query.relnode.OLAPProjectRel.implementOLAP(OLAPProjectRel.java:103) at org.apache.kylin.query.relnode.OLAPRel$OLAPImplementor.visitChild(OLAPRel.java:81) at org.apache.kylin.query.relnode.OLAPAggregateRel.implementOLAP(OLAPAggregateRel.java:132) at org.apache.kylin.query.relnode.OLAPRel$OLAPImplementor.visitChild(OLAPRel.java:81) at org.apache.kylin.query.relnode.OLAPLimitRel.implementOLAP(OLAPLimitRel.java:73) at org.apache.kylin.query.relnode.OLAPRel$OLAPImplementor.visitChild(OLAPRel.java:81) at org.apache.kylin.query.relnode.OLAPToEnumerableConverter.implement(OLAPToEnumerableConverter.java:67) at org.apache.calcite.adapter.enumerable.EnumerableRelImplementor.implementRoot(EnumerableRelImplementor.java:99) at org.apache.calcite.adapter.enumerable.EnumerableInterpretable.toBindable(EnumerableInterpretable.java:92) at org.apache.calcite.prepare.CalcitePrepareImpl$CalcitePreparingStmt.implement(CalcitePrepareImpl.java:1050) at org.apache.calcite.prepare.Prepare.prepareSql(Prepare.java:293) at org.apache.calcite.prepare.Prepare.prepareSql(Prepare.java:188) at org.apache.calcite.prepare.CalcitePrepareImpl.prepare2_(CalcitePrepareImpl.java:671) at org.apache.calcite.prepare.CalcitePrepareImpl.prepare_(CalcitePrepareImpl.java:572) at org.apache.calcite.prepare.CalcitePrepareImpl.prepareSql(CalcitePrepareImpl.java:541) at org.apache.calcite.jdbc.CalciteConnectionImpl.parseQuery(CalciteConnectionImpl.java:173) at org.apache.calcite.jdbc.CalciteMetaImpl.prepareAndExecute(CalciteMetaImpl.java:561) at org.apache.calcite.avatica.AvaticaConnection.prepareAndExecuteInternal(AvaticaConnection.java:477) at org.apache.calcite.avatica.AvaticaStatement.executeInternal(AvaticaStatement.java:109) I try it in kylin-1.0 and kylin-2.x-staging, the same exception throws. -- This message was sent by Atlassian JIRA (v6.3.4#6332)