This solution isn't good when there are +10000 tuples in the table, it's
slowly...
anybody can help me ? :
string = "SELECT service, noeud, rubrique FROM table" ; res = PQexec( conn, string.data() ) ; if (
(!res) || (status = PQresultStatus( res ) !=
PGRES_TUPLES_OK) ) { cerr << _ERROR << "Problem SELECT ! " << endl ; cerr << _ERROR
<<"Error : " << PQresStatus( status ) <<
endl ; cerr << _ERROR << "Error : " << PQresultErrorMessage(
res ) << endl ; PQclear( res ) ; } else { for (int m=0; m < PQntuples(
res); m++) { service = PQgetvalue( resultat1, m, 0 ) ; noeud
=PQgetvalue( resultat1, m, 1 ) ; rubrique = PQgetvalue( resultat1, m, 2 ) ;
commande = "SELECT SUM(date) FROM table WHERE
service='" + service +
"' AND noeud='" + noeud + "' AND rubrique='"+ rubrique + "'" ; res1 = PQexec( conn, string.data()
); if ( (! res1) || (status = PQresultStatus( res1
) != PGRES_TUPLES_OK)
) { cerr << _ERROR << "Problem SUM ! " <<
endl ; cerr << _ERROR << "Error : " <<
PQresStatus( status ) << endl ; cerr << _ERROR << "Error : " <<
PQresultErrorMessage( res1 ) << endl
; PQclear( res1 ) ; } else
{ cout << _TRACE << "SUM ok." << endl ; PQclear( res1 ) ;
} } PQclear( res ) ; }
Thanks. jerome.