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Vignesh Raghunathan commented on ASTERIXDB-1571: ------------------------------------------------ Could you please try the following query? {code} drop dataverse sampdb if exists; create dataverse sampdb; use sampdb; drop dataset samptable if exists; drop type samptabletype if exists; create type samptabletype as closed { id: int8 }; create dataset samptable(samptabletype) primary key id; insert into samptable ({'id' : 0}); insert into samptable ({'id' : 1}); with samptable1 as ( select * from samptable ) select * from ( select * from samptable1 s1 left outer join samptable1 s2 on s1.id = s2.id ) t ; {code} I tried to simplify my original query. Since the previous query was throwing a NPE, I assumed they were due to same reason without looking at the stack trace. > Subquery in from clause throws NullPointerException > --------------------------------------------------- > > Key: ASTERIXDB-1571 > URL: https://issues.apache.org/jira/browse/ASTERIXDB-1571 > Project: Apache AsterixDB > Issue Type: Bug > Environment: Master branch with latest commit id: > bd3a535b171a5cc7486175 > Reporter: Vignesh Raghunathan > Assignee: Yingyi Bu > > To reproduce the issue, run the following sqlpp statements > {code} > drop dataverse sampdb if exists; > create dataverse sampdb; > use sampdb; > drop dataset samptable if exists; > drop type samptabletype if exists; > create type samptabletype as closed { > id: int8 > }; > create dataset samptable(samptabletype) primary key id; > insert into samptable ({'id' : 0}); > insert into samptable ({'id' : 1}); > select * > from > ( > select * from samptable > ); > {code} > Result: > {code} > Aug 12, 2016 1:57:08 PM org.apache.asterix.api.http.servlet.APIServlet doPost > SEVERE: null > java.lang.NullPointerException > at > org.apache.asterix.lang.sqlpp.visitor.SqlppFormatPrintVisitor.visit(SqlppFormatPrintVisitor.java:130) > at > org.apache.asterix.lang.sqlpp.visitor.SqlppFormatPrintVisitor.visit(SqlppFormatPrintVisitor.java:1) > at > org.apache.asterix.lang.sqlpp.clause.Projection.accept(Projection.java:45) > at > org.apache.asterix.lang.sqlpp.visitor.SqlppFormatPrintVisitor.visit(SqlppFormatPrintVisitor.java:193) > at > org.apache.asterix.lang.sqlpp.visitor.SqlppFormatPrintVisitor.visit(SqlppFormatPrintVisitor.java:1) > at > org.apache.asterix.lang.sqlpp.clause.SelectRegular.accept(SelectRegular.java:40) > at > org.apache.asterix.lang.sqlpp.visitor.SqlppFormatPrintVisitor.visit(SqlppFormatPrintVisitor.java:169) > at > org.apache.asterix.lang.sqlpp.visitor.SqlppFormatPrintVisitor.visit(SqlppFormatPrintVisitor.java:1) > at > org.apache.asterix.lang.sqlpp.clause.SelectClause.accept(SelectClause.java:42) > at > org.apache.asterix.lang.sqlpp.visitor.SqlppFormatPrintVisitor.visit(SqlppFormatPrintVisitor.java:140) > at > org.apache.asterix.lang.sqlpp.visitor.SqlppFormatPrintVisitor.visit(SqlppFormatPrintVisitor.java:1) > at > org.apache.asterix.lang.sqlpp.struct.SetOperationInput.accept(SetOperationInput.java:56) > at > org.apache.asterix.lang.sqlpp.visitor.SqlppFormatPrintVisitor.visit(SqlppFormatPrintVisitor.java:201) > at > org.apache.asterix.lang.sqlpp.visitor.SqlppFormatPrintVisitor.visit(SqlppFormatPrintVisitor.java:1) > at > org.apache.asterix.lang.sqlpp.clause.SelectSetOperation.accept(SelectSetOperation.java:47) > at > org.apache.asterix.lang.sqlpp.visitor.SqlppFormatPrintVisitor.visit(SqlppFormatPrintVisitor.java:223) > at > org.apache.asterix.lang.sqlpp.visitor.SqlppFormatPrintVisitor.visit(SqlppFormatPrintVisitor.java:1) > at > org.apache.asterix.lang.sqlpp.expression.SelectExpression.accept(SelectExpression.java:55) > at > org.apache.asterix.lang.sqlpp.util.SqlppFormatPrintUtil.toString(SqlppFormatPrintUtil.java:90) > at > org.apache.asterix.lang.sqlpp.util.SqlppFormatPrintUtil.toString(SqlppFormatPrintUtil.java:76) > at > org.apache.asterix.lang.sqlpp.util.ExpressionToVariableUtil.getGeneratedIdentifier(ExpressionToVariableUtil.java:48) > at > org.apache.asterix.lang.sqlpp.util.ExpressionToVariableUtil.getGeneratedVariable(ExpressionToVariableUtil.java:91) > at > org.apache.asterix.lang.sqlpp.parser.SQLPPParser.FromTerm(SQLPPParser.java:3767) > at > org.apache.asterix.lang.sqlpp.parser.SQLPPParser.FromClause(SQLPPParser.java:3674) > at > org.apache.asterix.lang.sqlpp.parser.SQLPPParser.SelectBlock(SQLPPParser.java:3342) > at > org.apache.asterix.lang.sqlpp.parser.SQLPPParser.SelectSetOperation(SQLPPParser.java:3255) > at > org.apache.asterix.lang.sqlpp.parser.SQLPPParser.SelectExpression(SQLPPParser.java:3226) > at > org.apache.asterix.lang.sqlpp.parser.SQLPPParser.Query(SQLPPParser.java:2176) > at > org.apache.asterix.lang.sqlpp.parser.SQLPPParser.SingleStatement(SQLPPParser.java:414) > at > org.apache.asterix.lang.sqlpp.parser.SQLPPParser.Statement(SQLPPParser.java:325) > at > org.apache.asterix.lang.sqlpp.parser.SQLPPParser.parse(SQLPPParser.java:260) > at > org.apache.asterix.api.http.servlet.APIServlet.doPost(APIServlet.java:119) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:707) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) > at > org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:845) > at > org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:583) > at > org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:224) > at > org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1180) > at > org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:511) > at > org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185) > at > org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1112) > at > org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141) > at > org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134) > at org.eclipse.jetty.server.Server.handle(Server.java:524) > at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:319) > at > org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:253) > at > org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:273) > at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:95) > at > org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:93) > at > org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.executeProduceConsume(ExecuteProduceConsume.java:303) > at > org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceConsume(ExecuteProduceConsume.java:148) > at > org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:136) > at > org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671) > at > org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:589) > at java.lang.Thread.run(Thread.java:745) > {code} -- This message was sent by Atlassian JIRA (v6.3.4#6332)