[ https://issues.apache.org/jira/browse/PIG-1693?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13016159#comment-13016159 ]
Mridul Muralidharan commented on PIG-1693: ------------------------------------------ Thanks for clarifying Thejas ! Not sure how this will interact with JOIN and others (which was one the rationale for forced project I guess ?), but this perfectly fits our usecases - along with a few in coke I guess. - Mridul > support project-range expression. (was: There needs to be a way in foreach to > indicate "and all the rest of the fields" ) > ------------------------------------------------------------------------------------------------------------------------- > > Key: PIG-1693 > URL: https://issues.apache.org/jira/browse/PIG-1693 > Project: Pig > Issue Type: New Feature > Components: impl > Reporter: Alan Gates > Assignee: Thejas M Nair > Fix For: 0.9.0 > > Attachments: PIG-1693.1.patch, PIG-1693.2.patch > > > A common use case we see in Pig is people have many columns in their data and > they only want to operate on a few of them. Consider for example if before > storing data with ten columns, the user wants to perform a cast on one column: > {code} > ... > Z = foreach Y generate (int)firstcol, secondcol, thridcol, forthcol, > fifthcol, sixthcol, seventhcol, eigthcol, ninethcol, tenthcol; > store Z into 'output'; > {code} > Obviously this only gets worse as the user has more columns. Ideally the > above could be transformed to something like: > {code} > ... > Z = foreach Y generate (int)firstcol, "and all the rest"; > store Z into 'output' > {code} -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira