You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

Tom Lane 0d3f4406df Allow aggregate functions to be VARIADIC. ... There's no inherent reason why an aggregate function can't be variadic (even VARIADIC ANY) if its transition function can handle the case. Indeed, this patch to add the feature touches none of the planner or executor, and little of the parser; the main missing stuff was DDL and pg_dump support. It is true that variadic aggregates can create the same sort of ambiguity about parameters versus ORDER BY keys that was complained of when we (briefly) had both one- and two-argument forms of string_agg(). However, the policy formed in response to that discussion only said that we'd not create any built-in aggregates with varying numbers of arguments, not that we shouldn't allow users to do it. So the logical extension of that is we can allow users to make variadic aggregates as long as we're wary about shipping any such in core. In passing, this patch allows aggregate function arguments to be named, to the extent of remembering the names in pg_proc and dumping them in pg_dump. You can't yet call an aggregate using named-parameter notation. That seems like a likely future extension, but it'll take some work, and it's not what this patch is really about. Likewise, there's still some work needed to make window functions handle VARIADIC fully, but I left that for another day. initdb forced because of new aggvariadic field in Aggref parse nodes.		13 years ago
..
alter.h	pgindent run for release 9.3	13 years ago
async.h	Update copyrights for 2013	13 years ago
cluster.h	Add support for REFRESH MATERIALIZED VIEW CONCURRENTLY.	13 years ago
collationcmds.h	pgindent run for release 9.3	13 years ago
comment.h	pgindent run for release 9.3	13 years ago
conversioncmds.h	pgindent run for release 9.3	13 years ago
copy.h	pgindent run for release 9.3	13 years ago
createas.h	Clean up the mess around EXPLAIN and materialized views.	13 years ago
dbcommands.h	pgindent run for release 9.3	13 years ago
defrem.h	Allow aggregate functions to be VARIADIC.	13 years ago
discard.h	Update copyrights for 2013	13 years ago
event_trigger.h	pgindent run for release 9.3	13 years ago
explain.h	Clean up the mess around EXPLAIN and materialized views.	13 years ago
extension.h	pgindent run for release 9.3	13 years ago
lockcmds.h	Update copyrights for 2013	13 years ago
matview.h	Add support for REFRESH MATERIALIZED VIEW CONCURRENTLY.	13 years ago
portalcmds.h	Update copyrights for 2013	13 years ago
prepare.h	Update copyrights for 2013	13 years ago
proclang.h	pgindent run for release 9.3	13 years ago
schemacmds.h	pgindent run for release 9.3	13 years ago
seclabel.h	pgindent run for release 9.3	13 years ago
sequence.h	pgindent run for release 9.3	13 years ago
tablecmds.h	pgindent run for release 9.3	13 years ago
tablespace.h	pgindent run for release 9.3	13 years ago
trigger.h	pgindent run for release 9.3	13 years ago
typecmds.h	pgindent run for release 9.3	13 years ago
user.h	pgindent run for release 9.3	13 years ago
vacuum.h	Improve concurrency of foreign key locking	13 years ago
variable.h	Update copyrights for 2013	13 years ago
view.h	WITH CHECK OPTION support for auto-updatable VIEWs	13 years ago