PGresult *res;
const char *paramValues[] = { ts_start, ts_stop, blob };
int paramFormats[] = {  0 ,  0 ,  1  };
int paramLengths[] = {  0 ,  0 , blob_size };

res = PQexecParams(conn, "INSERT INTO traffic_bin (ts_start, ts_stop, ts_dblog, int_version, blb_traffic) VALUES ($1, $2, NOW(), "VERSION", $3);",  3 , NULL, paramValues, paramLengths, paramFormats,  1 );

float fval;
const char *paramValues[] = { (char*)&fval };
int paramFormats[] = {  1  };
int paramLengths[] = { sizeof(float) };
res = PQexecParams(conn, "INSERT INTO AAA (F1) VALUES ($1)",  1 , NULL, paramValues, paramLengths, paramFormats,  1 );