[VC6][URGENT] SQLRowCount retourne un rowcount de -1

**Vow** · 28/04/2005, 11h36

Bonjour,

Je cherche depuis hier pourquoi ma variable nLignes retourne -1 � chaque fois que je fais une requ�te SELECT (m�me toute simple) via la fonction SQLExecDirect :

Code :

S�lectionner tout - Visualiser dans une fen�tre � part

iErrCode = SQLRowCount(hStmt, &nLignes);

Certains sites disent que �a vient du driver ODBC.
Je fais mes tests sur une base SQL Server. Hors je pense pas que le driver de base {SQL Server} (sur Windows 2000 Pro) soit d�pourvu de cette fonctionnalit�.

Vous avez une id�e ?
Merci

**matazz** · 28/04/2005, 17h52

c'est peut-�tre une remarque con mais tu as essay� ta requ�te dans l'interface de SQL server et est-ce qu'elle marche ?
Si oui, est-ce que ton login � les droits de faire des SELECT, UPDATE sur cette base ?

**Vow** · 28/04/2005, 17h57

Oui pour les deux

**matazz** · 28/04/2005, 18h09

ben dans la MSDN ils disent �a :

RowCountPtr

Points to a buffer in which to return a row count. For UPDATE, INSERT, and DELETE statements, for the SQL_ADD, SQL_UPDATE_BY_BOOKMARK, and SQL_DELETE_BY_BOOKMARK operations in SQLBulkOperations, and for the SQL_UPDATE or SQL_DELETE operations in SQLSetPos, the value returned in *RowCountPtr is the number of rows affected by the request or �1 if the number of affected rows is not available.

...donc effectivment je pense que t'on hypoth�se est la bonne.
J'imagine que t'as essay� de chercher un update du Driver, et du system.

Si c'est le cas, je t'avoue que je vois pas...

**Vow** · 28/04/2005, 18h22

J'avoue ne pas avoir pens� � regarder un update du driver. Je regarderai �a � mon retour.
Merci encore.
@++

**Vow** · 13/06/2005, 09h26

Bon, un peu de retard mais voil� le r�sultat : la mise � jour ne change rien, j'ai toujours -1 ...

mat.M · 13/06/2005, 09h59

Il faut tester iErr , code retour , et non pas le nombre de lignes nLignes !

Si nLignes vaut -1 c'est qu'il ya un probl�me cela va de soit
Or toujours selon le MSDN il ya diff�rent codes d'erreur :

Returns

SQL_SUCCESS, SQL_SUCCESS_WITH_INFO, SQL_ERROR, or SQL_INVALID_HANDLE.

Diagnostics

When SQLRowCount returns SQL_ERROR or SQL_SUCCESS_WITH_INFO, an associated SQLSTATE value can be obtained by calling SQLGetDiagRec with a HandleType of SQL_HANDLE_STMT and a Handle of StatementHandle. The following table lists the SQLSTATE values commonly returned by SQLRowCount and explains each one in the context of this function; the notation "(DM)" precedes the descriptions of SQLSTATEs returned by the Driver Manager. The return code associated with each SQLSTATE value is SQL_ERROR, unless noted otherwise.

SQLSTATE Error Description
01000 General warning Driver-specific informational message. (Function returns SQL_SUCCESS_WITH_INFO.)
HY000 General error An error occurred for which there was no specific SQLSTATE and for which no implementation-specific SQLSTATE was defined. The error message returned by SQLGetDiagRec in the *MessageText buffer describes the error and its cause.
HY001 Memory allocation error The driver was unable to allocate memory required to support execution or completion of the function.
HY010 Function sequence error (DM) The function was called prior to calling SQLExecute, SQLExecDirect, SQLBulkOperations, or SQLSetPos for the StatementHandle.
(DM) An asynchronously executing function was called for the StatementHandle and was still executing when this function was called.

(DM) SQLExecute, SQLExecDirect, SQLBulkOperations, or SQLSetPos was called for the StatementHandle and returned SQL_NEED_DATA. This function was called before data was sent for all data-at-execution parameters or columns.

HY013 Memory management error The function call could not be processed because the underlying memory objects could not be accessed, possibly because of low memory conditions.
HYT01 Connection timeout expired The connection timeout period expired before the data source responded to the request. The connection timeout period is set through SQLSetConnectAttr, SQL_ATTR_CONNECTION_TIMEOUT.
IM001 Driver does not support this function (DM) The driver associated with the StatementHandle does not support the function.

Soit c'est la version de MDAC qui est � mettre en cause soit c'est un probl�me SQL -SERVER

Sinon chercher sur le disque d'installation de VC++ cat�gories SAMPLES il ya des exemples d'utilisation de SQLRowCount et des API ODBC