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
Hive >> mail # user >> Execution of udf


Hi,

Select col1,myudf(col2,col3) from table1;
In what phase if map reduce an udf is executed.

In the very beginning, I assumed that hive will be joining two tables.,
getting the required columns and then applies udf on columns specified
I.e., essentially on reducer phase . But later on I realised that I was
wrong.

Is there any specific parameter which suggests hive to call udf at reducer
phase rather than at Mapper phase.
Regards,
Nagarjuna
--
Sent from iPhone
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