[ https://issues.apache.org/jira/browse/PIG-932?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Olga Natkovich resolved PIG-932. -------------------------------- Resolution: Duplicate This is duplicate of https://issues.apache.org/jira/browse/PIG-1324 > Required fields projection in Loader: nested fields in bag/tuple, map key > lookup more than two levels > ----------------------------------------------------------------------------------------------------- > > Key: PIG-932 > URL: https://issues.apache.org/jira/browse/PIG-932 > Project: Pig > Issue Type: Improvement > Components: impl > Affects Versions: 0.3.0 > Reporter: Daniel Dai > Assignee: Daniel Dai > Fix For: 0.8.0 > > > To leverage the performance features provided by Zebra, Pig should be able to > figure out which input fields are actually used in Pig script, and prune > unnecessary inputs. This feature is being implementing in > [PIG-922|https://issues.apache.org/jira/browse/PIG-922]. However, there are > two limitations currently: > 1. Pruning nested fields only apply to map. We do not prune sub-field inside > a bag or tuple > 2. For map, currently we only go one level deep. Eg, if in Pig script, user > uses a#'key0'#'key1', a#'key0' will be asked > These two limitations are in line with current limitation of Zebra loader. > Once Zebra loader can handle this, we need to work to lift these limitations. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.