Re: BUG #11120: Decrease in no. of rows while sorting

pankhuri.sai@gmail.com writes:
> n executing the following query, it is found that no. of actual rows after
> hash join of part and partsupp (158960) is not equal to no. of rows sorted
> after that(158755).

I don't see any bug there.  It looks like the mergejoin stopped a bit
short of reading all the output from the sort node, which is unsurprising
behavior for a mergejoin: it can stop as soon as it's exhausted the output
from either input.

            regards, tom lane