我想使用odbc在SQL Server中批量插入数组。我在c中写了一个非常简单的例子。
我的阵列：
SQLVARCHAR custIDs[] ={1,2,3,4};
并使用此语句尝试绑定此数组：
retcode =bcp_bind(hdbc1, (BYTE *)custIDs, 0, sizeof(DBINT), NULL,0, SQLINT4, 2);
在这一行中，我收到了关于access violation at position 0X004c0788
如何更改代码以解决此问题？
在这里你可以找到我的整个代码：
#include <stdio.h>
#include <string.h>
#include <windows.h>
#include <sql.h>
#include <sqlext.h>
#include <odbcss.h>
#include<tchar.h>
#include<iostream>
SQLHENV henv = SQL_NULL_HENV;
HDBC hdbc1 = SQL_NULL_HDBC, hdbc2 = SQL_NULL_HDBC;
SQLHSTMT hstmt2 = SQL_NULL_HSTMT;
void Cleanup() {
if (hstmt2 != SQL_NULL_HSTMT)
SQLFreeHandle(SQL_HANDLE_STMT, hstmt2);
if (hdbc1 != SQL_NULL_HDBC) {
SQLDisconnect(hdbc1);
SQLFreeHandle(SQL_HANDLE_DBC, hdbc1);
}
if (hdbc2 != SQL_NULL_HDBC) {
SQLDisconnect(hdbc2);
SQLFreeHandle(SQL_HANDLE_DBC, hdbc2);
}
if (henv != SQL_NULL_HENV)
SQLFreeHandle(SQL_HANDLE_ENV, henv);
}
void HandleDiagnosticRecord (SQLHANDLE hHandle,
SQLSMALLINT hType,
RETCODE RetCode)
{
SQLSMALLINT iRec = 0;
SQLINTEGER iError;
WCHAR wszMessage[1000];
WCHAR wszState[SQL_SQLSTATE_SIZE+1];
if (RetCode == SQL_INVALID_HANDLE)
{
fwprintf(stderr, L"Invalid handle!\n");
return;
}
while (SQLGetDiagRec(hType,
hHandle,
++iRec,
wszState,
&iError,
wszMessage,
(SQLSMALLINT)(sizeof(wszMessage) / sizeof(WCHAR)),
(SQLSMALLINT *)NULL) == SQL_SUCCESS)
{
// Hide data truncated..
if (wcsncmp(wszState, L"01004", 5))
{
fwprintf(stderr, L"[%5.5s] %s (%d)\n", wszState, wszMessage, iError);
}
}
}
#define TRYODBC(h, ht, x) { RETCODE rc = x;\
if (rc != SQL_SUCCESS) \
{ \
HandleDiagnosticRecord (h, ht, rc); \
} \
if (rc == SQL_ERROR) \
{ \
fwprintf(stderr, L"Error in " L#x L"\n"); \
Sleep(30000); \
} \
}
void extract_error(
char *fn,
SQLHANDLE handle,
SQLSMALLINT type)
{
SQLINTEGER i = 0;
SQLINTEGER native;
SQLWCHAR state[ 7 ];
SQLWCHAR text[256];
SQLSMALLINT len;
SQLRETURN ret;
fprintf(stderr,
"\n"
"The driver reported the following diagnostics whilst running "
"%s\n\n",
fn);
do
{
ret = SQLGetDiagRec(type, handle, ++i, state, &native, text,
sizeof(text), &len );
if (SQL_SUCCEEDED(ret))
printf("%s:%ld:%ld:%s\n", state, i, native, text);
}
while( ret == SQL_SUCCESS );
}
int main() {
try
{
RETCODE retcode;
// BCP variables.
char *terminator = "\0";
// bcp_done takes a different format return code because it returns number of rows bulk copied
// after the last bcp_batch call.
DBINT cRowsDone = 0;
// Set up separate return code for bcp_sendrow so it is not using the same retcode as SQLFetch.
RETCODE SendRet;
// Allocate the ODBC environment and save handle.
retcode = SQLAllocHandle (SQL_HANDLE_ENV, NULL, &henv);
if ( (retcode != SQL_SUCCESS_WITH_INFO) && (retcode != SQL_SUCCESS)) {
printf("SQLAllocHandle(Env) Failed\n\n");
Cleanup();
return(9);
}
// Notify ODBC that this is an ODBC 3.0 app.
retcode = SQLSetEnvAttr(henv, SQL_ATTR_ODBC_VERSION, (SQLPOINTER) SQL_OV_ODBC3, SQL_IS_INTEGER);
if ( (retcode != SQL_SUCCESS_WITH_INFO) && (retcode != SQL_SUCCESS)) {
printf("SQLSetEnvAttr(ODBC version) Failed\n\n");
Cleanup();
return(9);
}
// Allocate ODBC connection handle, set bulk copy mode, and connect.
retcode = SQLAllocHandle(SQL_HANDLE_DBC, henv, &hdbc1);
if ( (retcode != SQL_SUCCESS_WITH_INFO) && (retcode != SQL_SUCCESS)) {
printf("SQLAllocHandle(hdbc1) Failed\n\n");
Cleanup();
return(9);
}
retcode = SQLSetConnectAttr(hdbc1, SQL_COPT_SS_BCP, (void *)SQL_BCP_ON, SQL_IS_INTEGER);
if ( (retcode != SQL_SUCCESS_WITH_INFO) && (retcode != SQL_SUCCESS)) {
printf("SQLSetConnectAttr(hdbc1) Failed\n\n");
Cleanup();
return(9);
}
// sample uses Integrated Security, create the SQL Server DSN using Windows NT authentication
SQLWCHAR dsn[30] = L"mssqltest"; //Name DNS
SQLWCHAR user[10] = L"di_test";
SQLWCHAR pass[10] = L"di_test";
// SQLWCHAR tb[20]=L"information1";
retcode = SQLConnectW(hdbc1, (SQLWCHAR *)dsn, SQL_NTS, (SQLWCHAR *) user, SQL_NTS, (SQLWCHAR *) pass, SQL_NTS);
if ( (retcode != SQL_SUCCESS) && (retcode != SQL_SUCCESS_WITH_INFO) ) {
printf("SQLConnect() Failed\n\n");
Cleanup();
return(9);
}
// TRYODBC(hdbc1, SQL_HANDLE_DBC, retcode);
// Initialize the bulk copy.
retcode = bcp_initW(hdbc1,L"information1", NULL, L"C:\\error.txt", DB_IN);
TRYODBC(hdbc1, SQL_HANDLE_DBC, retcode);
if ( (retcode != SQL_SUCCESS) && (retcode != SQL_SUCCESS_WITH_INFO) ) {
printf("bcp_init(hdbc1) Failed\n\n");
Cleanup();
return(9);
}
//Define our array
DBINT custIDs[] ={1,2,3,4};
// Bind the program variables for the bulk copy.
retcode =bcp_bind(hdbc1, (BYTE *)&custIDs, 0, sizeof(DBINT), NULL,0, SQLINT4, 2);
if ( (retcode != SQL_SUCCESS) && (retcode != SQL_SUCCESS_WITH_INFO) ) {
printf("bcp_bind(hdbc1) Failed\n\n");
Cleanup();
return(9);
}
// Could normally use strlen to calculate the bcp_bind cbTerm parameter, but this terminator
// is a null byte (\0), which gives strlen a value of 0. Explicitly give cbTerm a value of 1.
retcode = bcp_bind(hdbc1,(LPCBYTE) custIDs, 2, SQL_VARLEN_DATA, NULL,0, SQL_C_NUMERIC, 3);
if ( (retcode != SUCCEED) ) {
printf("bcp_bind(hdbc1) Failed\n\n");
Cleanup();
return(9);
}
if ( (SendRet = bcp_sendrow(hdbc1) ) != SUCCEED ) {
printf("bcp_sendrow(hdbc1) Failed\n\n");
Cleanup();
return(9);
}
cRowsDone = bcp_done(hdbc1);
if ( (cRowsDone == -1) ) {
printf("bcp_done(hdbc1) Failed\n\n");
Cleanup();
return(9);
}
printf("Number of rows bulk copied after last bcp_batch call = %d.\n", cRowsDone);
// Cleanup.
SQLFreeHandle(SQL_HANDLE_STMT, hstmt2);
SQLDisconnect(hdbc1);
SQLFreeHandle(SQL_HANDLE_DBC, hdbc1);
SQLDisconnect(hdbc2);
SQLFreeHandle(SQL_HANDLE_DBC, hdbc2);
SQLFreeHandle(SQL_HANDLE_ENV, henv);
}
catch(int e)
{
std::wcout <<"An exception occured"<<" "<<e;
}
}