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https://issues.apache.org/jira/browse/PIG-942?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12750796#action_12750796
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Sriranjan Manjunath commented on PIG-942:
-----------------------------------------
Here's the complete script:
A = load 'map.txt' as (e);
B = load 'map.txt' as (f);
C = join A by (chararray)e#'100', B by (chararray)f#'100';
dump C;
> Maps are not implicitly casted
> ------------------------------
>
> Key: PIG-942
> URL: https://issues.apache.org/jira/browse/PIG-942
> Project: Pig
> Issue Type: Bug
> Reporter: Sriranjan Manjunath
>
> A = load 'foo' as (m) throws the following exception when foo has maps.
> java.lang.ClassCastException: org.apache.pig.data.DataByteArray cannot be
> cast to java.util.Map
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POMapLookUp.getNext(POMapLookUp.java:98)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POMapLookUp.getNext(POMapLookUp.java:115)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POCast.getNext(POCast.java:612)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.processPlan(POForEach.java:278)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.getNext(POForEach.java:204)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator.processInput(PhysicalOperator.java:231)
> at
> org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POLocalRearrange.getNext(POLocalRearrange.java:240)
> at
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapBase.runPipeline(PigMapBase.java:249)
> at
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapBase.map(PigMapBase.java:240)
> at
> org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapReduce$Map.map(PigMapReduce.java:93)
> at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:47)
> at org.apache.hadoop.mapred.MapTask.run(MapTask.java:227)
> at
> org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:2198)
> The same works if I explicitly cast m to a map: A = load 'foo' as (m:[])
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