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force schema with TOBAG
David LaBarbera 2012-10-30, 17:22
I have a cogroup which effectively does a full outer join of two relations. Some of the relations are blank, so I have a FOREACH statement like
grouped = COGROUP relation1 BY x, relation2 BY y;
normalized = FOREACH grouped {
normal1 = TOBAG('$ID_NULL', 0L);
value1 = ( IsEmpty(relation1) ? normal1 : relation1 );
GENERATE relation1, relation2;
}
I get an error on the bincond that left and right schemas don't match. I'm informed that TOBAG return
bag{:tuple(:NULL)}
for the schema
and relation1 is
bag{:tuple(id:chararrat,timestamp:long)}
I'm running this on EMR which has a modified version of .0.9.2. Any thoughts on how to force TOBAG's schema to match relation1's?
David
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Re: force schema with TOBAG
Cheolsoo Park 2012-10-30, 18:29
Hi David,
Try to *add parentheses* inside the TOBAG:
normal1 = TOBAG( ('$ID_NULL', 0L) );
or
value1 = ( IsEmpty(relation1) ? TOBAG( ('$ID_NULL', 0L) ) : relation1 );
The reason is because by TOBAG('$ID_NULL', 0L), you mean { ('$ID_NULL'),
(0) }. But I believe that what you want is { ('$ID_NULL', 0) } given the
schema of relation 1.
Thanks,
Cheolsoo
On Tue, Oct 30, 2012 at 10:22 AM, David LaBarbera <
[EMAIL PROTECTED]> wrote:
> I have a cogroup which effectively does a full outer join of two
> relations. Some of the relations are blank, so I have a FOREACH statement
> like
>
> grouped = COGROUP relation1 BY x, relation2 BY y;
> normalized = FOREACH grouped {
> normal1 = TOBAG('$ID_NULL', 0L);
> value1 = ( IsEmpty(relation1) ? normal1 : relation1 );
> GENERATE relation1, relation2;
> }
>
> I get an error on the bincond that left and right schemas don't match. I'm
> informed that TOBAG return
> bag{:tuple(:NULL)}
> for the schema
> and relation1 is
> bag{:tuple(id:chararrat,timestamp:long)}
>
> I'm running this on EMR which has a modified version of .0.9.2. Any
> thoughts on how to force TOBAG's schema to match relation1's?
>
> David
>
>
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Re: force schema with TOBAG
David LaBarbera 2012-10-31, 11:53
Cheolsoo
Thank you for the response. This works in 0.10, but not on 0.9.2-amzn. I get an error message that there's an unexpected symbol at or near $ID_NULL (ID_NULL is being replaced, I just thought it would be more clear here)
David
On Oct 30, 2012, at 2:29 PM, Cheolsoo Park <[EMAIL PROTECTED]> wrote:
> Hi David,
>
> Try to *add parentheses* inside the TOBAG:
>
> normal1 = TOBAG( ('$ID_NULL', 0L) );
>
> or
>
> value1 = ( IsEmpty(relation1) ? TOBAG( ('$ID_NULL', 0L) ) : relation1 );
>
> The reason is because by TOBAG('$ID_NULL', 0L), you mean { ('$ID_NULL'),
> (0) }. But I believe that what you want is { ('$ID_NULL', 0) } given the
> schema of relation 1.
>
> Thanks,
> Cheolsoo
>
> On Tue, Oct 30, 2012 at 10:22 AM, David LaBarbera <
> [EMAIL PROTECTED]> wrote:
>
>> I have a cogroup which effectively does a full outer join of two
>> relations. Some of the relations are blank, so I have a FOREACH statement
>> like
>>
>> grouped = COGROUP relation1 BY x, relation2 BY y;
>> normalized = FOREACH grouped {
>> normal1 = TOBAG('$ID_NULL', 0L);
>> value1 = ( IsEmpty(relation1) ? normal1 : relation1 );
>> GENERATE relation1, relation2;
>> }
>>
>> I get an error on the bincond that left and right schemas don't match. I'm
>> informed that TOBAG return
>> bag{:tuple(:NULL)}
>> for the schema
>> and relation1 is
>> bag{:tuple(id:chararrat,timestamp:long)}
>>
>> I'm running this on EMR which has a modified version of .0.9.2. Any
>> thoughts on how to force TOBAG's schema to match relation1's?
>>
>> David
>>
>>
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Re: force schema with TOBAG
Cheolsoo Park 2012-10-31, 16:23
Hi David,
How about "TOBAG( TOTUPLE( $ID_NULL, 0L ) )" ? The "( )" is just
a syntactical sugar for "TOTUPLE( )" that was introduced in 0.10. (Sorry
that I forgot that "( )" doesn't work in 0.9.)
Thanks,
Cheolsoo
On Wed, Oct 31, 2012 at 4:53 AM, David LaBarbera <
[EMAIL PROTECTED]> wrote:
> Cheolsoo
>
> Thank you for the response. This works in 0.10, but not on 0.9.2-amzn. I
> get an error message that there's an unexpected symbol at or near $ID_NULL
> (ID_NULL is being replaced, I just thought it would be more clear here)
>
> David
>
> On Oct 30, 2012, at 2:29 PM, Cheolsoo Park <[EMAIL PROTECTED]> wrote:
>
> > Hi David,
> >
> > Try to *add parentheses* inside the TOBAG:
> >
> > normal1 = TOBAG( ('$ID_NULL', 0L) );
> >
> > or
> >
> > value1 = ( IsEmpty(relation1) ? TOBAG( ('$ID_NULL', 0L) ) : relation1 );
> >
> > The reason is because by TOBAG('$ID_NULL', 0L), you mean { ('$ID_NULL'),
> > (0) }. But I believe that what you want is { ('$ID_NULL', 0) } given the
> > schema of relation 1.
> >
> > Thanks,
> > Cheolsoo
> >
> > On Tue, Oct 30, 2012 at 10:22 AM, David LaBarbera <
> > [EMAIL PROTECTED]> wrote:
> >
> >> I have a cogroup which effectively does a full outer join of two
> >> relations. Some of the relations are blank, so I have a FOREACH
> statement
> >> like
> >>
> >> grouped = COGROUP relation1 BY x, relation2 BY y;
> >> normalized = FOREACH grouped {
> >> normal1 = TOBAG('$ID_NULL', 0L);
> >> value1 = ( IsEmpty(relation1) ? normal1 : relation1 );
> >> GENERATE relation1, relation2;
> >> }
> >>
> >> I get an error on the bincond that left and right schemas don't match.
> I'm
> >> informed that TOBAG return
> >> bag{:tuple(:NULL)}
> >> for the schema
> >> and relation1 is
> >> bag{:tuple(id:chararrat,timestamp:long)}
> >>
> >> I'm running this on EMR which has a modified version of .0.9.2. Any
> >> thoughts on how to force TOBAG's schema to match relation1's?
> >>
> >> David
> >>
> >>
>
>
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Re: force schema with TOBAG
David LaBarbera 2012-10-31, 16:54
Cheolsoo
That works. Thanks so much for the help.
And congratulations on your new committer status!
David
On Oct 31, 2012, at 12:23 PM, Cheolsoo Park <[EMAIL PROTECTED]> wrote:
> Hi David,
>
> How about "TOBAG( TOTUPLE( $ID_NULL, 0L ) )" ? The "( )" is just
> a syntactical sugar for "TOTUPLE( )" that was introduced in 0.10. (Sorry
> that I forgot that "( )" doesn't work in 0.9.)
>
> Thanks,
> Cheolsoo
>
> On Wed, Oct 31, 2012 at 4:53 AM, David LaBarbera <
> [EMAIL PROTECTED]> wrote:
>
>> Cheolsoo
>>
>> Thank you for the response. This works in 0.10, but not on 0.9.2-amzn. I
>> get an error message that there's an unexpected symbol at or near $ID_NULL
>> (ID_NULL is being replaced, I just thought it would be more clear here)
>>
>> David
>>
>> On Oct 30, 2012, at 2:29 PM, Cheolsoo Park <[EMAIL PROTECTED]> wrote:
>>
>>> Hi David,
>>>
>>> Try to *add parentheses* inside the TOBAG:
>>>
>>> normal1 = TOBAG( ('$ID_NULL', 0L) );
>>>
>>> or
>>>
>>> value1 = ( IsEmpty(relation1) ? TOBAG( ('$ID_NULL', 0L) ) : relation1 );
>>>
>>> The reason is because by TOBAG('$ID_NULL', 0L), you mean { ('$ID_NULL'),
>>> (0) }. But I believe that what you want is { ('$ID_NULL', 0) } given the
>>> schema of relation 1.
>>>
>>> Thanks,
>>> Cheolsoo
>>>
>>> On Tue, Oct 30, 2012 at 10:22 AM, David LaBarbera <
>>> [EMAIL PROTECTED]> wrote:
>>>
>>>> I have a cogroup which effectively does a full outer join of two
>>>> relations. Some of the relations are blank, so I have a FOREACH
>> statement
>>>> like
>>>>
>>>> grouped = COGROUP relation1 BY x, relation2 BY y;
>>>> normalized = FOREACH grouped {
>>>> normal1 = TOBAG('$ID_NULL', 0L);
>>>> value1 = ( IsEmpty(relation1) ? normal1 : relation1 );
>>>> GENERATE relation1, relation2;
>>>> }
>>>>
>>>> I get an error on the bincond that left and right schemas don't match.
>> I'm
>>>> informed that TOBAG return
>>>> bag{:tuple(:NULL)}
>>>> for the schema
>>>> and relation1 is
>>>> bag{:tuple(id:chararrat,timestamp:long)}
>>>>
>>>> I'm running this on EMR which has a modified version of .0.9.2. Any
>>>> thoughts on how to force TOBAG's schema to match relation1's?
>>>>
>>>> David
>>>>
>>>>
>>
>>
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Re: force schema with TOBAG
Cheolsoo Park 2012-10-31, 17:05
Great! Thanks!
On Wed, Oct 31, 2012 at 9:54 AM, David LaBarbera <
[EMAIL PROTECTED]> wrote:
> Cheolsoo
>
> That works. Thanks so much for the help.
> And congratulations on your new committer status!
>
> David
>
> On Oct 31, 2012, at 12:23 PM, Cheolsoo Park <[EMAIL PROTECTED]> wrote:
>
> > Hi David,
> >
> > How about "TOBAG( TOTUPLE( $ID_NULL, 0L ) )" ? The "( )" is just
> > a syntactical sugar for "TOTUPLE( )" that was introduced in 0.10. (Sorry
> > that I forgot that "( )" doesn't work in 0.9.)
> >
> > Thanks,
> > Cheolsoo
> >
> > On Wed, Oct 31, 2012 at 4:53 AM, David LaBarbera <
> > [EMAIL PROTECTED]> wrote:
> >
> >> Cheolsoo
> >>
> >> Thank you for the response. This works in 0.10, but not on 0.9.2-amzn. I
> >> get an error message that there's an unexpected symbol at or near
> $ID_NULL
> >> (ID_NULL is being replaced, I just thought it would be more clear here)
> >>
> >> David
> >>
> >> On Oct 30, 2012, at 2:29 PM, Cheolsoo Park <[EMAIL PROTECTED]>
> wrote:
> >>
> >>> Hi David,
> >>>
> >>> Try to *add parentheses* inside the TOBAG:
> >>>
> >>> normal1 = TOBAG( ('$ID_NULL', 0L) );
> >>>
> >>> or
> >>>
> >>> value1 = ( IsEmpty(relation1) ? TOBAG( ('$ID_NULL', 0L) ) : relation1
> );
> >>>
> >>> The reason is because by TOBAG('$ID_NULL', 0L), you mean {
> ('$ID_NULL'),
> >>> (0) }. But I believe that what you want is { ('$ID_NULL', 0) } given
> the
> >>> schema of relation 1.
> >>>
> >>> Thanks,
> >>> Cheolsoo
> >>>
> >>> On Tue, Oct 30, 2012 at 10:22 AM, David LaBarbera <
> >>> [EMAIL PROTECTED]> wrote:
> >>>
> >>>> I have a cogroup which effectively does a full outer join of two
> >>>> relations. Some of the relations are blank, so I have a FOREACH
> >> statement
> >>>> like
> >>>>
> >>>> grouped = COGROUP relation1 BY x, relation2 BY y;
> >>>> normalized = FOREACH grouped {
> >>>> normal1 = TOBAG('$ID_NULL', 0L);
> >>>> value1 = ( IsEmpty(relation1) ? normal1 : relation1 );
> >>>> GENERATE relation1, relation2;
> >>>> }
> >>>>
> >>>> I get an error on the bincond that left and right schemas don't match.
> >> I'm
> >>>> informed that TOBAG return
> >>>> bag{:tuple(:NULL)}
> >>>> for the schema
> >>>> and relation1 is
> >>>> bag{:tuple(id:chararrat,timestamp:long)}
> >>>>
> >>>> I'm running this on EMR which has a modified version of .0.9.2. Any
> >>>> thoughts on how to force TOBAG's schema to match relation1's?
> >>>>
> >>>> David
> >>>>
> >>>>
> >>
> >>
>
>
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