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From "Viraj Bhat (JIRA)" <j...@apache.org>
Subject [jira] Created: (PIG-1211) Pig script runs half way after which it reports syntax error
Date Fri, 29 Jan 2010 02:29:35 GMT
Pig script runs half way after which it reports syntax error
------------------------------------------------------------

                 Key: PIG-1211
                 URL: https://issues.apache.org/jira/browse/PIG-1211
             Project: Pig
          Issue Type: Improvement
          Components: impl
    Affects Versions: 0.6.0
            Reporter: Viraj Bhat
             Fix For: 0.8.0


I have a Pig script which is structured in the following way

{code}
register cp.jar

dataset = load '/data/dataset/' using PigStorage('\u0001') as (col1, col2, col3, col4, col5);

filtered_dataset = filter dataset by (col1 == 1);

proj_filtered_dataset = foreach filtered_dataset generate col2, col3;

rmf $output1;

store proj_filtered_dataset into '$output1' using PigStorage();

second_stream = foreach filtered_dataset  generate col2, col4, col5;

group_second_stream = group second_stream by col4;

output2 = foreach group_second_stream {
 a =  second_stream.col2
 b =   distinct second_stream.col5;
 c = order b by $0;
 generate 1 as key, group as keyword, MYUDF(c, 100) as finalcalc;
}

rmf  $output2;

--syntax error here
store output2 to '$output2' using PigStorage();

{code}

I run this script using the Multi-query option, it runs successfully till the first store
but later fails with a syntax error. 

The usage of HDFS option, "rmf" causes the first store to execute. 

The only option the I have is to run an explain before running his script 

grunt> explain -script myscript.pig -out explain.out

or moving the rmf statements to the top of the script

Here are some questions:

a) Can we have an option to do something like "checkscript" instead of explain to get the
same syntax error?  In this way I can ensure that I do not run for 3-4 hours before encountering
a syntax error
b) Can pig not figure out a way to re-order the rmf statements since all the store directories
are variables

Thanks
Viraj

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