table1 ,aa 14, 12,bb
table2
,aa
14,
12,bb
k = cogroup table1 by (a,b),table2 by (a,b);
k:
((,aa),{(,aa)},{})
((,aa),{},{(,aa)})
((14,),{(14,)},{(14,)})
((12,bb),{(12,bb)},{(12,bb)})
when I use cogroup,(,aa) null is in front,(14,) null is not in front. is there
a parameter I can get result like this
((,aa),{(,aa)},{(,aa)})
((14,),{(14,)},{(14,)})
((12,bb),{(12,bb)},{(12,bb)})
thank you.
