[ https://issues.apache.org/jira/browse/PIG-1798?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Daniel Dai updated PIG-1798: ---------------------------- Fix Version/s: (was: 0.10) > nested foreach - alias for expression does not work > --------------------------------------------------- > > Key: PIG-1798 > URL: https://issues.apache.org/jira/browse/PIG-1798 > Project: Pig > Issue Type: Bug > Affects Versions: 0.8.0 > Reporter: Thejas M Nair > Assignee: Daniel Dai > > In following example, the nested foreach statement has an alias ld used for > output of distinct udf . Pig gives an error during query plan generation - > {code} > grunt> l = load 'x' as (a, b); > grunt> g = group l by a; > grunt> f = foreach g { ld = org.apache.pig.builtin.Distinct(l); f = filter ld > by $0 > 1; generate COUNT(f);} > grunt> explain f; > 2011-01-11 12:18:33,908 [main] WARN org.apache.pig.PigServer - Encountered > Warning IMPLICIT_CAST_TO_INT 1 time(s). > 2011-01-11 12:18:33,908 [main] INFO > org.apache.pig.backend.hadoop.executionengine.HExecutionEngine - > pig.usenewlogicalplan is set to true. New logical plan will be used. > 2011-01-11 12:18:33,941 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR > 1067: Unable to explain alias f > Details at logfile: /Users/tejas/pig_comb2/trunk/pig_1294777094048.log > less /Users/tejas/pig_comb2/trunk/pig_1294777094048.log > Pig Stack Trace > --------------- > ERROR 1067: Unable to explain alias f > org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1067: Unable to > explain alias f > at org.apache.pig.PigServer.explain(PigServer.java:1053) > at > org.apache.pig.tools.grunt.GruntParser.explainCurrentBatch(GruntParser.java:358) > at > org.apache.pig.tools.grunt.GruntParser.processExplain(GruntParser.java:290) > at > org.apache.pig.tools.grunt.GruntParser.processExplain(GruntParser.java:253) > at > org.apache.pig.tools.pigscript.parser.PigScriptParser.Explain(PigScriptParser.java:665) > at > org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:325) > at > org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:166) > at > org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:142) > at org.apache.pig.tools.grunt.Grunt.run(Grunt.java:76) > at org.apache.pig.Main.run(Main.java:475) > at org.apache.pig.Main.main(Main.java:109) > Caused by: java.lang.NullPointerException > at > org.apache.pig.newplan.logical.ForeachInnerPlanVisitor.translateInnerPlanConnection(ForeachInnerPlanVisitor.java:87) > at > org.apache.pig.newplan.logical.ForeachInnerPlanVisitor.visit(ForeachInnerPlanVisitor.java:245) > at org.apache.pig.impl.logicalLayer.LOFilter.visit(LOFilter.java:114) > at > org.apache.pig.impl.logicalLayer.LogicalOperator.visit(LogicalOperator.java:1) > at > org.apache.pig.impl.plan.DependencyOrderWalkerWOSeenChk.walk(DependencyOrderWalkerWOSeenChk.java:71) > at org.apache.pig.impl.plan.PlanVisitor.visit(PlanVisitor.java:51) > at > org.apache.pig.newplan.logical.LogicalPlanMigrationVistor.visit(LogicalPlanMigrationVistor.java:245) > at > org.apache.pig.impl.logicalLayer.LOForEach.visit(LOForEach.java:132) > at > org.apache.pig.impl.logicalLayer.LogicalOperator.visit(LogicalOperator.java:1) > at > org.apache.pig.impl.plan.DependencyOrderWalker.walk(DependencyOrderWalker.java:70) > at org.apache.pig.impl.plan.PlanVisitor.visit(PlanVisitor.java:51) > at > org.apache.pig.backend.hadoop.executionengine.HExecutionEngine.compile(HExecutionEngine.java:264) > at org.apache.pig.PigServer.compilePp(PigServer.java:1460) > at org.apache.pig.PigServer.explain(PigServer.java:1022) > ... 10 more > ================================================================================ > {code} -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira