variadic args to C functions

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 do something 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.

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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 do something 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.

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http://www.postgresql.org/mailpref/pgsql-general

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