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https://issues.apache.org/jira/browse/PIG-1643?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Daniel Dai updated PIG-1643:
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Attachment: PIG-1643.3.patch
PIG-1643.3.patch is more general than PIG-1643.2.patch. It solves this null
schema issue for all expressions.
> join fails for a query with input having 'load using pigstorage without
> schema' + 'foreach'
> -------------------------------------------------------------------------------------------
>
> Key: PIG-1643
> URL: https://issues.apache.org/jira/browse/PIG-1643
> Project: Pig
> Issue Type: Bug
> Affects Versions: 0.8.0
> Reporter: Thejas M Nair
> Assignee: Thejas M Nair
> Fix For: 0.8.0
>
> Attachments: PIG-1643.1.patch, PIG-1643.2.patch, PIG-1643.3.patch
>
>
> {code}
> l1 = load 'std.txt';
> l2 = load 'std.txt';
> f1 = foreach l1 generate $0 as abc, $1 as def;
> -- j = join f1 by $0, l2 by $0 using 'replicated';
> -- j = join l2 by $0, f1 by $0 using 'replicated';
> j = join l2 by $0, f1 by $0 ;
> dump j;
> {code}
> the error -
> {code}
> 2010-09-22 16:24:48,584 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR
> 2044: The type null cannot be collected as a Key type
> {code}
> The MR plan from explain -
> {code}
> #--------------------------------------------------
> # Map Reduce Plan
> #--------------------------------------------------
> MapReduce node scope-21
> Map Plan
> Union[tuple] - scope-22
> |
> |---j: Local Rearrange[tuple]{bytearray}(false) - scope-11
> | | |
> | | Project[bytearray][0] - scope-12
> | |
> | |---l2:
> Load(file:///Users/tejas/pig_obyfail/trunk/std.txt:org.apache.pig.builtin.PigStorage)
> - scope-0
> |
> |---j: Local Rearrange[tuple]{NULL}(false) - scope-13
> | |
> | Project[NULL][0] - scope-14
> |
> |---f1: New For Each(false,false)[bag] - scope-6
> | |
> | Project[bytearray][0] - scope-2
> | |
> | Project[bytearray][1] - scope-4
> |
> |---l1:
> Load(file:///Users/tejas/pig_obyfail/trunk/std.txt:org.apache.pig.builtin.PigStorage)
> - scope-1--------
> Reduce Plan
> j: Store(/tmp/x:org.apache.pig.builtin.PigStorage) - scope-18
> |
> |---POJoinPackage(true,true)[tuple] - scope-23--------
> Global sort: false
> ----------------
> {code}
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