"David G. Johnston" <david.g.johns...@gmail.com> writes:
> If the SRFs return a different number of rows the LCM behavior kicks in and
> you get Robert's second result.

Only if the periods of the SRFs are relatively prime.  That is, neither of
his examples demonstrate the full weirdness of the current behavior; for
that, you need periods that are multiples of each other.  For instance:

SELECT generate_series(1, 2), generate_series(1, 4); 
 generate_series | generate_series 
               1 |               1
               2 |               2
               1 |               3
               2 |               4
(4 rows)

That doesn't comport with any behavior available from LATERAL.

                        regards, tom lane

Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org)
To make changes to your subscription:

Reply via email to