[jira] Commented: (PIG-1606) flatten documentation does not discuss flatten of empty bag

2010-09-15 Thread Olga Natkovich (JIRA) 

[ 
https://issues.apache.org/jira/browse/PIG-1606?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12909810#action_12909810
 ] 

Olga Natkovich commented on PIG-1606:
-

If we are not planning to change the semantics I will ask Corinne to document 
for 0.8

> flatten documentation does not discuss flatten of empty bag
> ---
>
> Key: PIG-1606
> URL: https://issues.apache.org/jira/browse/PIG-1606
> Project: Pig
>  Issue Type: Bug
>  Components: documentation
>Reporter: Thejas M Nair
> Fix For: 0.9.0
>
>
> From the existing flatten documentation, it is not clear that flatten of an 
> empty bag results in that row being discarded .
> For example the following query gives no output -
> {code}
> grunt> cat /tmp/empty.bag
> {}  1
> grunt> l = load '/tmp/empty.bag' as (b : bag{}, i : int);
> grunt> f = foreach l generate flatten(b), i;
> grunt> dump f;
> grunt>
> {code}

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[jira] Commented: (PIG-1606) flatten documentation does not discuss flatten of empty bag

2010-09-10 Thread Alan Gates (JIRA) 

[ 
https://issues.apache.org/jira/browse/PIG-1606?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12908259#action_12908259
 ] 

Alan Gates commented on PIG-1606:
-

flatten of an empty bag has to be a black hole else cogroup + foreach != inner 
join, which we claim it does.

> flatten documentation does not discuss flatten of empty bag
> ---
>
> Key: PIG-1606
> URL: https://issues.apache.org/jira/browse/PIG-1606
> Project: Pig
>  Issue Type: Bug
>  Components: documentation
>Reporter: Thejas M Nair
> Fix For: 0.9.0
>
>
> From the existing flatten documentation, it is not clear that flatten of an 
> empty bag results in that row being discarded .
> For example the following query gives no output -
> {code}
> grunt> cat /tmp/empty.bag
> {}  1
> grunt> l = load '/tmp/empty.bag' as (b : bag{}, i : int);
> grunt> f = foreach l generate flatten(b), i;
> grunt> dump f;
> grunt>
> {code}

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[jira] Commented: (PIG-1606) flatten documentation does not discuss flatten of empty bag

2010-09-10 Thread Olga Natkovich (JIRA) 

[ 
https://issues.apache.org/jira/browse/PIG-1606?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12908250#action_12908250
 ] 

Olga Natkovich commented on PIG-1606:
-

Is this even the semantics we want. I would expect a single row with an empty 
field.

> flatten documentation does not discuss flatten of empty bag
> ---
>
> Key: PIG-1606
> URL: https://issues.apache.org/jira/browse/PIG-1606
> Project: Pig
>  Issue Type: Bug
>  Components: documentation
>Reporter: Thejas M Nair
> Fix For: 0.9.0
>
>
> From the existing flatten documentation, it is not clear that flatten of an 
> empty bag results in that row being discarded .
> For example the following query gives no output -
> {code}
> grunt> cat /tmp/empty.bag
> {}  1
> grunt> l = load '/tmp/empty.bag' as (b : bag{}, i : int);
> grunt> f = foreach l generate flatten(b), i;
> grunt> dump f;
> grunt>
> {code}

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