qt调用oracle存储过程,该怎么处理
qt调用oracle存储过程
我用qt操作oracle数据库，根据帮助文档，有下面的用法：
QSqlQuery query;
query.prepare("CALL AsciiToInt(?, ?)");
query.bindValue(0, "A");
query.bindValue(1, 0, QSql::Out);
query.exec();
int i = query.boundValue(1).toInt(); // i is 65
但当参数中有游标类型sys_refcursor 时，该如何调用，又如何接受返回结果呢？
------解决方案--------------------
QT可能不支持这个功能 － Accessing REF CURSOR in Stored Procedure from Qt。
可以通过ODBC API来做，同样是跨平台的
The following sample application shows how to return a result set by using Oracle ODBC Driver:
/*
* Sample Application using Oracle reference cursors through ODBC
*
* Assumptions:
*
* 1) Oracle Sample database is present with data loaded for the EMP table.
*
* 2) Two fields are referenced from the EMP table, ename and mgr.
*
* 3) A data source has been setup to access the sample database.
*
*
* Program Description:
*
* Abstract:
*
* This program demonstrates how to return result sets using
* Oracle stored procedures
*
* Details:
*
* This program:
* Creates an ODBC connection to the database.
* Creates a Packaged Procedure containing two result sets.
* Executes the procedure and retrieves the data from both result sets.
* Displays the data to the user.
* Deletes the package then logs the user out of the database.
*
*
* The following is the actual PL/SQL this code generates to
* create the stored procedures.
*
DROP PACKAGE ODBCRefCur;
CREATE PACKAGE ODBCRefCur AS
TYPE ename_cur IS REF CURSOR;
TYPE mgr_cur IS REF CURSOR;
PROCEDURE EmpCurs(Ename IN OUT ename_cur, Mgr IN OUT mgr_cur, pjob IN VARCHAR2);
END;
/
CREATE PACKAGE BODY ODBCRefCur AS
PROCEDURE EmpCurs(Ename IN OUT ename_cur, Mgr IN OUT mgr_cur, pjob IN VARCHAR2)
AS
BEGIN
IF NOT Ename%ISOPEN
THEN
OPEN Ename for SELECT ename from emp;
END IF;
IF NOT Mgr%ISOPEN
THEN
OPEN Mgr for SELECT mgr from emp where job = pjob;
END IF;
END;
END;
/
*
* End PL/SQL for Reference Cursor.
*/
/*
* Include Files
*/
#include <stdio.h>
#include <sql.h>
#include <sqlext.h>
/*
* Defines
*/
#define JOB_LEN 9
#define DATA_LEN 100
#define SQL_STMT_LEN 500
/*
* Procedures
*/
void DisplayError( SWORD HandleType, SQLHANDLE hHandle, char *Module );
/*
* Main Program
*/
int main()
{
SQLHENV hEnv;
SQLHDBC hDbc;
SQLHSTMT hStmt;
SQLRETURN rc;
char *DefUserName ="scott";
char *DefPassWord ="tiger";
SQLCHAR ServerName[DATA_LEN];
SQLCHAR *pServerName=ServerName;
SQLCHAR UserName[DATA_LEN];
SQLCHAR *pUserName=UserName;
SQLCHAR PassWord[DATA_LEN];
SQLCHAR *pPassWord=PassWord;
char Data[DATA_LEN];
SQLINTEGER DataLen;
char error[DATA_LEN];
char *charptr;
SQLCHAR SqlStmt[SQL_STMT_LEN];
SQLCHAR *pSqlStmt=SqlStmt;
char *pSalesMan = "SALESMAN";
SQLINTEGER sqlnts=SQL_NTS;
/*
* Allocate the Environment Handle
*/
rc = SQLAllocHandle( SQL_HANDLE_ENV, SQL_NULL_HANDLE, &hEnv );
if (rc != SQL_SUCCESS)
{
printf( "Cannot Allocate Environment Handle\n");
printf( "\nHit Return to Exit\n");
charptr = gets ((char *)error);
exit(1);
}
/*
* Set the ODBC Version
*/
rc = SQLSetEnvAttr( hEnv,SQL_ATTR_ODBC_VERSION,(void *)SQL_OV_ODBC3,0);
if (rc != SQL_SUCCESS)
我用qt操作oracle数据库，根据帮助文档，有下面的用法：
QSqlQuery query;
query.prepare("CALL AsciiToInt(?, ?)");
query.bindValue(0, "A");
query.bindValue(1, 0, QSql::Out);
query.exec();
int i = query.boundValue(1).toInt(); // i is 65
但当参数中有游标类型sys_refcursor 时，该如何调用，又如何接受返回结果呢？
------解决方案--------------------
QT可能不支持这个功能 － Accessing REF CURSOR in Stored Procedure from Qt。
可以通过ODBC API来做，同样是跨平台的
The following sample application shows how to return a result set by using Oracle ODBC Driver:
/*
* Sample Application using Oracle reference cursors through ODBC
*
* Assumptions:
*
* 1) Oracle Sample database is present with data loaded for the EMP table.
*
* 2) Two fields are referenced from the EMP table, ename and mgr.
*
* 3) A data source has been setup to access the sample database.
*
*
* Program Description:
*
* Abstract:
*
* This program demonstrates how to return result sets using
* Oracle stored procedures
*
* Details:
*
* This program:
* Creates an ODBC connection to the database.
* Creates a Packaged Procedure containing two result sets.
* Executes the procedure and retrieves the data from both result sets.
* Displays the data to the user.
* Deletes the package then logs the user out of the database.
*
*
* The following is the actual PL/SQL this code generates to
* create the stored procedures.
*
DROP PACKAGE ODBCRefCur;
CREATE PACKAGE ODBCRefCur AS
TYPE ename_cur IS REF CURSOR;
TYPE mgr_cur IS REF CURSOR;
PROCEDURE EmpCurs(Ename IN OUT ename_cur, Mgr IN OUT mgr_cur, pjob IN VARCHAR2);
END;
/
CREATE PACKAGE BODY ODBCRefCur AS
PROCEDURE EmpCurs(Ename IN OUT ename_cur, Mgr IN OUT mgr_cur, pjob IN VARCHAR2)
AS
BEGIN
IF NOT Ename%ISOPEN
THEN
OPEN Ename for SELECT ename from emp;
END IF;
IF NOT Mgr%ISOPEN
THEN
OPEN Mgr for SELECT mgr from emp where job = pjob;
END IF;
END;
END;
/
*
* End PL/SQL for Reference Cursor.
*/
/*
* Include Files
*/
#include <stdio.h>
#include <sql.h>
#include <sqlext.h>
/*
* Defines
*/
#define JOB_LEN 9
#define DATA_LEN 100
#define SQL_STMT_LEN 500
/*
* Procedures
*/
void DisplayError( SWORD HandleType, SQLHANDLE hHandle, char *Module );
/*
* Main Program
*/
int main()
{
SQLHENV hEnv;
SQLHDBC hDbc;
SQLHSTMT hStmt;
SQLRETURN rc;
char *DefUserName ="scott";
char *DefPassWord ="tiger";
SQLCHAR ServerName[DATA_LEN];
SQLCHAR *pServerName=ServerName;
SQLCHAR UserName[DATA_LEN];
SQLCHAR *pUserName=UserName;
SQLCHAR PassWord[DATA_LEN];
SQLCHAR *pPassWord=PassWord;
char Data[DATA_LEN];
SQLINTEGER DataLen;
char error[DATA_LEN];
char *charptr;
SQLCHAR SqlStmt[SQL_STMT_LEN];
SQLCHAR *pSqlStmt=SqlStmt;
char *pSalesMan = "SALESMAN";
SQLINTEGER sqlnts=SQL_NTS;
/*
* Allocate the Environment Handle
*/
rc = SQLAllocHandle( SQL_HANDLE_ENV, SQL_NULL_HANDLE, &hEnv );
if (rc != SQL_SUCCESS)
{
printf( "Cannot Allocate Environment Handle\n");
printf( "\nHit Return to Exit\n");
charptr = gets ((char *)error);
exit(1);
}
/*
* Set the ODBC Version
*/
rc = SQLSetEnvAttr( hEnv,SQL_ATTR_ODBC_VERSION,(void *)SQL_OV_ODBC3,0);
if (rc != SQL_SUCCESS)