TypeCastInserter does not replace projects in inner plans correctly
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Key: PIG-428
URL: https://issues.apache.org/jira/browse/PIG-428
Project: Pig
Issue Type: Bug
Affects Versions: types_branch
Reporter: Pradeep Kamath
Fix For: types_branch
The TypeCastInserter tries to replace the Project's input operator in inner
plans with the new foreach operator it adds. However it should replace only
those Projects' input where the new Foreach has been added after the operator
which was earlier the input to Project.
Here is a query which fails due to this:
{code}
a = load 'st10k' as (name:chararray,age:int, gpa:double);
another = load 'st10k';
c = foreach another generate $0, $1+ 10, $2 + 10;
d = join a by $0, c by $0;
dump d;
{code}
Here is the error:
{noformat}
2008-09-11 23:34:28,169 [main] ERROR
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.Launcher - Error
message from task (map) tip_200809051428_0045_m_000000java.io.IOException: Type
mismatch in key from map: expected org.apache.pig.impl.io.NullableText,
recieved org.apache.pig.impl.io.NullableBytesWritable
at
org.apache.hadoop.mapred.MapTask$MapOutputBuffer.collect(MapTask.java:419)
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapReduce$Map.collect(PigMapReduce.java:83)
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapBase.runPipeline(PigMapBase.java:172)
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapBase.map(PigMapBase.java:158)
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapReduce$Map.map(PigMapReduce.java:75)
at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:47)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:219)
at
org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:2124)
{noformat}
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