Home | About | Sematext search-lucene.com search-hadoop.com
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB
 Search Hadoop and all its subprojects:

Switch to Threaded View
Pig >> mail # user >> Pig Map-reduce process


Copy link to this message
-
Re: Pig Map-reduce process
Did you try to use EXPLAIN operator?
http://pig.apache.org/docs/r0.12.0/test.html#explain.

2013/10/9 Krishnan Narayanan <[EMAIL PROTECTED]>

> Hi All,
>
> Can someone explain map-reduce process flow for the below script?
>
> b =  FOREACH a{ P_EVAR =  REPLACE(PEVAR35,'-','');
>                P_LEN = LENGTH(P_EVAR);
>                P_EVAR_10 = (LENGTH(P_EVAR) == 11 ?
> CONCAT(SUBSTRING(P_EVAR,8,11),SUBSTRING(P_EVAR,4,8)) : (LENGTH(P_EVAR) => 12 ?CONCAT(SUBSTRING(P_EVAR,8,12),SUBSTRING(P_EVAR,4,8)) : (LENGTH(P_EVAR)
> == 13 ? CONCAT(SUBSTRING(P_EVAR,9,13),SUBSTRING(P_EVAR,4,9)) : P_EVAR )));
> GENERATE P_EVAR,P_LEN,P_EVAR_10;
> };
>
> Thanks
> Krishnan
>
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB