Hello,

I've got a C++ library I need to use, and I want to use it from a pgsql
function.
Would anyone happen to have any examples of how to accomplish something
like this?
I see examples of C-based functions for pgsql (like dbsize, etc, in
contrib).

Which way should I go about this?

1) C based function, calling a C++ library (is this possible?)
2) C++ based function, calling a C++ library (I read in the pgsql docs
that compiling C++ code for use with pgsql is either partially
incompatible, or just a bad idea?)

Also note that I would like to pass the function the following arguments:
int4, _varchar (array of varchars)

Any help would be appreciated, I'm not incredibly experienced in these
matters.

Thanks,
Eric

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If you want to do this, publish an interface in your C++ library with
the interface functions declared as extern "C"

C++ calling C++ is not portable because of name mangling. Other than
that, if you use the same compiler there is rarely any problem.

I would use an extern "C" interface, if I were in your shoes.

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"Dann Corbit" <DCorbit (AT) connx (DOT) com> writes:
Note that the backend does not incorporate any C++ library support,
which is rather a severe handicap. For instance it will probably
not work to use catch/throw constructs.

regards, tom lane

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