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 > >> > >> > >
