[
https://issues.apache.org/jira/browse/PIG-1919?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13008637#comment-13008637
]
Thejas M Nair commented on PIG-1919:
------------------------------------
{code}
grunt> l = load 't.txt' as (a,b,c);
grunt> g = group l by a;
grunt> describe g;
g: {group: bytearray,l: {(a: bytearray,b: bytearray,c: bytearray)}}
grunt> o = order g by $1; -- this should have given an error message
grunt> dump o;
...
...
2011-03-18 14:26:23,903 [Thread-29] WARN
org.apache.hadoop.mapred.LocalJobRunner - job_local_0002
java.lang.ClassCastException: org.apache.pig.data.DataByteArray cannot be cast
to org.apache.pig.data.DataBag
at
org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POProject.processInputBag(POProject.java:487)
at
org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POProject.getNext(POProject.java:202)
at
org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator.getNext(PhysicalOperator.java:317)
at
org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POLocalRearrange.getNext(POLocalRearrange.java:325)
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapBase.runPipeline(PigMapBase.java:261)
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapBase.map(PigMapBase.java:256)
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapBase.map(PigMapBase.java:58)
at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:144)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:621)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:305)
at
org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:177)
{code}
> order-by on bag gives error only at runtime
> -------------------------------------------
>
> Key: PIG-1919
> URL: https://issues.apache.org/jira/browse/PIG-1919
> Project: Pig
> Issue Type: Bug
> Affects Versions: 0.8.0, 0.9.0
> Reporter: Thejas M Nair
> Fix For: 0.9.0
>
>
> Order-by on a bag or tuple should give error at query compile time, instead
> of giving an error at runtime.
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