This Confluence has been LDAP enabled, if you are an ASF Committer, please use your LDAP Credentials to login. Any problems file an INFRA jira ticket please.

Child pages
  • LanguageManual Transform

Versions Compared


  • This line was added.
  • This line was removed.
  • Formatting was changed.
Comment: Removed incorrect mention of 2.0 - maybe it meant 0.2? Anyway, transform has been around in hive from before hive was an apache project (from when it was a sub-project of hadoop)


Users can also plug in their own custom mappers and reducers in the data stream by using features natively supported in the Hive 2.0 language. e.g. in order to run a custom mapper script - map_script - and a custom reducer script - reduce_script - the user can issue the following command which uses the TRANSFORM clause to embed the mapper and the reducer scripts.