[ https://issues.apache.org/jira/browse/PIG-1573?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Alan Gates reassigned PIG-1573: ------------------------------- Assignee: Daniel Dai (was: Xuefu Zhang) > PIG shouldn't pass all input to a UDF if the UDF specify no argument > -------------------------------------------------------------------- > > Key: PIG-1573 > URL: https://issues.apache.org/jira/browse/PIG-1573 > Project: Pig > Issue Type: Bug > Affects Versions: 0.7.0 > Reporter: Xuefu Zhang > Assignee: Daniel Dai > Fix For: 0.9.0 > > > Currently If in a pig script user uses a UDF with no argument, PIG backend > assumes that the UDF takes all input so at run time it passes all input as a > tuple to the UDF. This assumption is incorrect, causing conceptual > confusions. If a UDF takes all input, it can specify a star (*) as its > argument. If it specify no argument at all, then we assume that it requires > no input data. > We need to differentiate no input and all input for a UDF. Thus, in case that > a UDF specify no argument, backend should pass the UDF an empty tuple. > See notes in PIG-1586 for more information. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.