Insert Binary Large Object (BLOB) in PostgreSQL using libpq from remote machine

Question

Can you give an example of inserting binary data in PostgreSQL database from remote machine using libpq. My second question is: Is there any other API more efficient than libpq

Answer 1

Using libpqxx is the C++ way to do it, while libpq is the C API.

Here is a full example of how to do it using pqxx: How to insert binary data into a PostgreSQL BYTEA column using the C++ libpqxx API?

In short, the relevant C++ lines using libpqxx look like this:

void * bin_data = ...; // obviously do what you need to get the binary data...
size_t bin_size = ...; // ...and the size of the binary data
pqxx::binarystring bin( bin_data, bin_size );
pqxx::result r = work.prepared( "test" )( bin ).exec();
work.commit();