ied
       <em class="parameter"><code>buffer</code></em>, of length <em class="parameter"><code>nbytes</code></em>, to the server.
       The result is 1 if the data was queued, zero if it was not queued
       because of full buffers (this will only happen in nonblocking mode),
       or -1 if an error occurred.
       (Use <a class="xref" href="libpq-status.html#LIBPQ-PQERRORMESSAGE"><code class="function">PQerrorMessage</code></a> to retrieve details if
       the return value is -1.  If the value is ze