Merge Join

Hello all,

I have a package where I use merge join for two sorted inputs and the output is stored in a raw file.

In another package, the raw file from above package is again merge joined with another sorted input. Now my question is....do we need to sort again the raw file from first package? or is it OK to set the isSorted property to True and define the sort keys?

Thank you.

As long as you know the input is sorted, you can use the issorted property.

If it turns out not to be sorted, you could miss joins.

BobP

|||

Thank you for the reply...

So here in my case I am using a left join (in merge join)....how would I know if the raw file output from first package i sorted or not?

There is no problem to sort it again but really takes a lot of time(as the size is too big).

|||

If you are sorting it and then writing it out, it should stay sorted.

BobP

|||Ok....if it stays sorted then OK.......many Thanks