[
https://issues.apache.org/jira/browse/DATAFU-41?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Matthew Hayes closed DATAFU-41.
-------------------------------
Resolution: Won't Fix
Closing this as it is quite old and there have been no updates.
> BagGroup does not name bag field in some cases
> ----------------------------------------------
>
> Key: DATAFU-41
> URL: https://issues.apache.org/jira/browse/DATAFU-41
> Project: DataFu
> Issue Type: Bug
> Reporter: Matthew Hayes
> Priority: Major
>
> For this test:
> {code}
> /**
> define BagSum datafu.pig.bags.BagSum();
> define BagGroup datafu.pig.bags.BagGroup();
>
> data = LOAD 'input' USING PigStorage(',') AS (id:int, key:chararray,
> val:int);
> describe data;
>
> data2 = GROUP data BY id;
>
> describe data2;
>
> data3 = FOREACH data2 GENERATE group as id, BagGroup(data,data.key) as
> grouped;
>
> describe data3;
>
> data4 = FOREACH data3 {
> summed = FOREACH grouped GENERATE group as key, SUM($1.val) as total;
> ordered = ORDER summed BY key;
> GENERATE id, ordered;
> }
>
> describe data4;
>
> STORE data4 INTO 'output';
> */
> @Multiline
> private String bagSumTest;
>
> @Test
> public void bagSumTest() throws Exception
> {
> PigTest test = createPigTestFromString(bagSumTest);
> writeLinesToFile("input", "1,A,1","1,B,2","2,A,3","3,A,4","1,C,5","1,C,6",
> "3,A,7","2,B,8","1,A,9","2,A,10");
> test.runScript();
> assertOutput(test, "data4",
> "(1,{(A,10),(B,2),(C,11)})",
> "(2,{(A,13),(B,8)})",
> "(3,{(A,11)})");
> }
> {code}
> {{data3}} is described as:
> {code}
> data3: {id: int,grouped: {(group: chararray,data: {(id: int,key:
> chararray,val: int)})}}
> {code}
> However, if we change {{data}} to {{data.(key,val)}} then {{data3}} is
> described as:
> {code}
> data3: {id: int,grouped: {(group: chararray,{(key: chararray,val: int)})}}
> {code}
> Note that there is no name, so you have to reference it by {{$1}}. There is
> a separate issues, DATAFU-40, where even when it has the name {{data}} you
> can run into problems later.
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