On Tue, Jun 27, 2017 at 10:01 AM, Colin 't Hart <colinth...@gmail.com> wrote: > Hi, > > The following rather contrived example illustrates that lag(), lead() > (and probably other functions) can't automatically cast an integer to > a bigint: > > select lag(sum,1,0) over () from (select sum(generate_series) over > (order by generate_series) from generate_series(1,10)) x; > ERROR: function lag(bigint, integer, integer) does not exist > LINE 1: select lag(sum,1,0) over () from (select sum(generate_series... > ^ > HINT: No function matches the given name and argument types. You > might need to add explicit type casts. > > > I guess this is because the lag() and lead() functions take any type, > and hence the default must be of the same type. > This had me stumped for a few while until I realised that the types > were different. > > Would there be any way to implement an automatic conversion? > > On the off-chance that this is actually a bug, this is on 9.6.3, but > it also occurs on 9.3.17
Why not cast the arguments? The first and the third argument have to be the same, and the second argument is always int. merlin -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
