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https://issues.apache.org/jira/browse/PIG-1892?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Daniel Dai updated PIG-1892:
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Attachment: PIG-1892-1.patch
> Bug in new logical plan : No output generated even though there are valid
> records
> ---------------------------------------------------------------------------------
>
> Key: PIG-1892
> URL: https://issues.apache.org/jira/browse/PIG-1892
> Project: Pig
> Issue Type: Bug
> Affects Versions: 0.8.0, 0.9.0
> Reporter: Vivek Padmanabhan
> Assignee: Daniel Dai
> Fix For: 0.8.0
>
> Attachments: PIG-1892-1.patch
>
>
> I have the below script which provides me no output even though there are
> valid records in relation B which is used for the left out join.
> A0 = load 'input' using Maploader() as ( map1, map2, map3 );
> A = filter A0 by ( (map2#'params'#'prop' == 464) and (map2#'params'#'query'
> is not null) );
> B0 = filter A by (map1#'type' == 'c');
> B = filter B0 by ( map2#'info'#'s' matches 'aaaa|bbb|cccc');
> C = filter A by (map1#'type' == 'p');
> D = join B by map2#'params'#'query' LEFT OUTER , C by map2#'params'#'query';
> store D into 'output';
> This is a bug with the newlogical plan. From the plan i can see that
> map1#'type' and map2#'info'#'s' is not marked as RequiredKeys ,
> but where as all the fields reffered in the firts filter statement is marked
> as required.
> For the script to work I have to turn off the coloumn prune optimizer by -t
> ColumnMapKeyPrune or rearrange the script such that;
> B0 = filter A0 by ( (map2#'params'#'prop' == 464) and
> (map2#'params'#'query' is not null) and (map1#'type' == 'c') );
> C = filter A0 by ( (map2#'params'#'prop' == 464) and
> (map2#'params'#'query' is not null) and (map1#'type' == 'p') );
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