Thread: variadic args to C functions
Has anyone got any pointers on implementing a C function in an extension that takes variadic args? I would like to do somethinglike: select my_function(XXX,...); where XXX will be between 1 and many integers. Possible? I didn't see any examples in the contrib directory.
Hello I wrote lot of C VARIADIC functions - some examples are in core - "format" function Schema | Name | Result data type | Argument data types | Type ------------+-----------+------------------+----------------------+-------- pg_catalog | concat | text | VARIADIC "any" | normal pg_catalog | concat_ws | text | text, VARIADIC "any" | normal pg_catalog | format | text | text, VARIADIC "any" | normal (3 rows) look to http://okbob.blogspot.cz/2010/11/new-version-of-pst-collection-is.html source code (string functions) Code should be same without differences between external and internal functions. Regards Pavel 2013/6/20 Alan Nilsson <anilsson@apple.com>: > Has anyone got any pointers on implementing a C function in an extension that takes variadic args? I would like to dosomething like: > > select my_function(XXX,...); where XXX will be between 1 and many integers. > > Possible? I didn't see any examples in the contrib directory. > > > > > -- > Sent via pgsql-general mailing list (pgsql-general@postgresql.org) > To make changes to your subscription: > http://www.postgresql.org/mailpref/pgsql-general
perfect, thanks much alan On Jun 20, 2013, at 1:27 AM, Pavel Stehule wrote: > Hello > > I wrote lot of C VARIADIC functions - some examples are in core - > "format" function > > Schema | Name | Result data type | Argument data types | Type > ------------+-----------+------------------+----------------------+-------- > pg_catalog | concat | text | VARIADIC "any" | normal > pg_catalog | concat_ws | text | text, VARIADIC "any" | normal > pg_catalog | format | text | text, VARIADIC "any" | normal > (3 rows) > > look to http://okbob.blogspot.cz/2010/11/new-version-of-pst-collection-is.html > source code (string functions) > > Code should be same without differences between external and internal functions. > > Regards > > Pavel > > > 2013/6/20 Alan Nilsson <anilsson@apple.com>: >> Has anyone got any pointers on implementing a C function in an extension that takes variadic args? I would like to dosomething like: >> >> select my_function(XXX,...); where XXX will be between 1 and many integers. >> >> Possible? I didn't see any examples in the contrib directory. >> >> >> >> >> -- >> Sent via pgsql-general mailing list (pgsql-general@postgresql.org) >> To make changes to your subscription: >> http://www.postgresql.org/mailpref/pgsql-general > > > -- > Sent via pgsql-general mailing list (pgsql-general@postgresql.org) > To make changes to your subscription: > http://www.postgresql.org/mailpref/pgsql-general