[Libpqxx-general] Unnamed prepared statements vs PQexecParams

[Jeroen Vermeulen]

Trigve Siver wrote:

>> Made some pretty radical changes after all, but support is in trunk now.
> I've tried to compile my code with new svn and got unresolved symbol:
> 
> unresolved external symbol "public: class pqxx::internal::parameterized_invocation __thiscall pqxx::transaction_base::parameterized(class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &)"
> 
> Don't know why. I link statically.

That means PQXX_HAVE_PQEXECPARAMS hasn't been defined in 
include/pqxx/config-internal-libpq.h.  Thus the build doesn't "know" 
that your libpq version supports PQexecParams().

In that case, I opted to suppress the definition of parameterized() so 
you can't build a program that uses parameterized statements on libpq 
versions that don't.  I would like to suppress the declaration as well, 
so you get a compile error instead of a link error, but that would 
require exposing the libpq feature macro directly to the client program.


Jeroen