COUNT(*) does not work
-----------------------
Key: PIG-812
URL: https://issues.apache.org/jira/browse/PIG-812
Project: Pig
Issue Type: Bug
Components: impl
Affects Versions: 0.2.0
Reporter: Viraj Bhat
Priority: Critical
Fix For: 0.2.0
Pig script to count the number of rows in a studenttab10k file which contains
10k records.
{code}
studenttab = LOAD 'studenttab10k' AS (name:chararray, age:int,gpa:float);
X2 = GROUP studenttab ALL;
describe X2;
Y2 = FOREACH X2 GENERATE COUNT(*);
explain Y2;
DUMP Y2;
{code}
returns the following error
================================================================
ERROR org.apache.pig.tools.grunt.Grunt - ERROR 1066: Unable to open iterator
for alias Y2
Details at logfile: /homes/viraj/pig-svn/trunk/pig_1242783700970.log
================================================================
If you look at the log file:
================================================================
Caused by: java.lang.ClassCastException
at org.apache.pig.builtin.COUNT$Initial.exec(COUNT.java:76)
at org.apache.pig.builtin.COUNT$Initial.exec(COUNT.java:68)
at
org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POUserFunc.getNext(POUserFunc.java:201)
at
org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POUserFunc.getNext(POUserFunc.java:235)
at
org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.processPlan(POForEach.java:254)
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:223)
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapBase.runPipeline(PigMapBase.java:245)
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapBase.map(PigMapBase.java:236)
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapReduce$Map.map(PigMapReduce.java:88)
at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:47)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:227)
================================================================
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