Function PQsendQueryPrepared

src/interfaces/libpq/fe-exec.c:1617–1653

* PQsendQueryPrepared * Like PQsendQuery, but execute a previously prepared statement, * using extended query protocol so we can pass parameters */

 *		using extended query protocol so we can pass parameters
 */
int
PQsendQueryPrepared(PGconn *conn,
					const char *stmtName,
					int nParams,
					const char *const *paramValues,
					const int *paramLengths,
					const int *paramFormats,
					int resultFormat)
{
	if (!PQsendQueryStart(conn, true))
		return 0;

	/* check the arguments */
	if (!stmtName)
	{
		appendPQExpBufferStr(&conn->errorMessage,
							 libpq_gettext("statement name is a null pointer\n"));
		return 0;
	}
	if (nParams < 0 || nParams > PQ_QUERY_PARAM_MAX_LIMIT)
	{
		appendPQExpBuffer(&conn->errorMessage,
						  libpq_gettext("number of parameters must be between 0 and %d\n"),
						  PQ_QUERY_PARAM_MAX_LIMIT);
		return 0;
	}

	return PQsendQueryGuts(conn,
						   NULL,	/* no command to parse */
						   stmtName,
						   nParams,
						   NULL,	/* no param types */
						   paramValues,
						   paramLengths,
						   paramFormats,
						   resultFormat);
}

/*
 * PQsendQueryStart