Join and Merge results different from Lookup
Posted: Fri Dec 14, 2012 9:28 am
Hi,
I have two files both containing around 3mn records. I wanted to check out which option would be fastest for joining the data. So I used same set of files in different jobs on Join, Merge and Lookup but am getting different matched records. The Join and Merge show same set of matched records, but lookup shows a totally different number.
On furthere analysis the Lookup output is correct. I'm trying to figure out what is wrong with Join and Merge.
I have already ensured that the keys are hash partitoned and sorted.
What else could I be missing?
I have two files both containing around 3mn records. I wanted to check out which option would be fastest for joining the data. So I used same set of files in different jobs on Join, Merge and Lookup but am getting different matched records. The Join and Merge show same set of matched records, but lookup shows a totally different number.
On furthere analysis the Lookup output is correct. I'm trying to figure out what is wrong with Join and Merge.
I have already ensured that the keys are hash partitoned and sorted.
What else could I be missing?