跟踪加载状态 (ODBC)

    SQLULEN rowsProcessed;
    SQLSetStmtAttr(hdlStmt, SQL_ATTR_PARAMS_PROCESSED_PTR, &rowsProcessed, 0);

    SQLUSMALLINT   rowResults[ NUM_ENTRIES ];
    SQLSetStmtAttr(hdlStmt, SQL_ATTR_PARAM_STATUS_PTR, rowResults, 0);

// Some standard headers
#include <stdio.h>
#include <stdlib.h>
// Only needed for Windows clients
// #include <windows.h>
// Standard ODBC headers
#include <sql.h>
#include <sqltypes.h>
#include <sqlext.h>
// Helper function to print SQL error messages.
template <typename HandleT>
void reportError(int handleTypeEnum, HandleT hdl)
{
    // Get the status records.
    SQLSMALLINT   i, MsgLen;
    SQLRETURN ret2;
    SQLCHAR       SqlState[6], Msg[SQL_MAX_MESSAGE_LENGTH];
    SQLINTEGER    NativeError;
    i = 1;
    printf("\n");
    while ((ret2 = SQLGetDiagRec(handleTypeEnum, hdl, i, SqlState, &NativeError,
        Msg, sizeof(Msg), &MsgLen)) != SQL_NO_DATA) {
            printf("error record %d\n", i);
            printf("sqlstate: %s\n", SqlState);
            printf("detailed msg: %s\n", Msg);
            printf("native error code: %d\n\n", NativeError);
            i++;
    }
}
int main()
{
    // Number of data rows to insert
    const int NUM_ENTRIES = 4;


    SQLRETURN ret;
    SQLHENV hdlEnv;
    ret = SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &hdlEnv);
    if(!SQL_SUCCEEDED(ret)) {
        printf("Could not allocate a handle.\n");
        exit(EXIT_FAILURE);
    } else {
        printf("Allocated an environment handle.\n");
    }
    ret = SQLSetEnvAttr(hdlEnv, SQL_ATTR_ODBC_VERSION,
        (SQLPOINTER) SQL_OV_ODBC3, SQL_IS_UINTEGER);
    if(!SQL_SUCCEEDED(ret)) {
        printf("Could not set application version to ODBC3.\n");
        exit(EXIT_FAILURE);
    } else {
        printf("Set application to ODBC 3.\n");
    }
    SQLHDBC hdlDbc;
    ret = SQLAllocHandle(SQL_HANDLE_DBC, hdlEnv, &hdlDbc);
    if(!SQL_SUCCEEDED(ret)) {
        printf("Could not allocate database handle.\n");
        exit(EXIT_FAILURE);
    } else {
        printf("Allocated Database handle.\n");
    }
    // Connect to the database
    printf("Connecting to database.\n");
    const char *dsnName = "ExampleDB";
    const char* userID = "dbadmin";
    const char* passwd = "password123";
    ret = SQLConnect(hdlDbc, (SQLCHAR*)dsnName,
        SQL_NTS,(SQLCHAR*)userID,SQL_NTS,
        (SQLCHAR*)passwd, SQL_NTS);
    if(!SQL_SUCCEEDED(ret)) {
        printf("Could not connect to database.\n");
        reportError<SQLHDBC>(SQL_HANDLE_DBC, hdlDbc);
        exit(EXIT_FAILURE);
    } else {
        printf("Connected to database.\n");
    }
    // Set up a statement handle
    SQLHSTMT hdlStmt;
    SQLAllocHandle(SQL_HANDLE_STMT, hdlDbc, &hdlStmt);
    SQLExecDirect(hdlStmt, (SQLCHAR*)"DROP TABLE IF EXISTS customers",
        SQL_NTS);
    // Create a table into which we can store data
    printf("Creating table.\n");
    ret = SQLExecDirect(hdlStmt, (SQLCHAR*)"CREATE TABLE customers "
        "(CustID int, CustName varchar(50), Phone_Number char(15));",
        SQL_NTS);
    if(!SQL_SUCCEEDED(ret)) {
        reportError<SQLHDBC>( SQL_HANDLE_STMT, hdlStmt );
        exit(EXIT_FAILURE);
    } else {
        printf("Created table.\n");
    }
    // Create the prepared statement. This will insert data into the
    // table we created above.
    printf("Creating prepared statement\n");
    ret = SQLPrepare (hdlStmt, (SQLTCHAR*)"INSERT INTO customers (CustID, "
        "CustName,  Phone_Number) VALUES(?,?,?)", SQL_NTS) ;
    if(!SQL_SUCCEEDED(ret)) {
        reportError<SQLHDBC>( SQL_HANDLE_STMT, hdlStmt );
        exit(EXIT_FAILURE);
    } else {
        printf("Created prepared statement.\n");
    }
    // This is the data to be inserted into the database.
    char custNames[][50] = { "Allen, Anna", "Brown, Bill", "Chu, Cindy",
        "Dodd, Don" };
    SQLINTEGER custIDs[] = { 100, 101, 102, 103};
    char phoneNums[][15] = {"1-617-555-1234", "1-781-555-1212",
        "1-508-555-4321", "1-617-555-4444"};
    // Bind the data arrays to the parameters in the prepared SQL
    // statement
    ret = SQLBindParameter(hdlStmt, 1, SQL_PARAM_INPUT, SQL_C_LONG, SQL_INTEGER,
        0, 0, (SQLPOINTER)custIDs, sizeof(SQLINTEGER) , NULL);
    if(!SQL_SUCCEEDED(ret)) {
        reportError<SQLHDBC>( SQL_HANDLE_STMT, hdlStmt );
        exit(EXIT_FAILURE);
    } else {
        printf("Bound CustIDs array to prepared statement\n");
    }
    // Bind CustNames
    SQLBindParameter(hdlStmt, 2, SQL_PARAM_INPUT, SQL_C_CHAR, SQL_VARCHAR,
        50, 0, (SQLPOINTER)custNames, 50, NULL);
    if(!SQL_SUCCEEDED(ret)) {
        reportError<SQLHDBC>( SQL_HANDLE_STMT, hdlStmt );
        exit(EXIT_FAILURE);
    } else {
        printf("Bound CustNames array to prepared statement\n");
    }
    // Bind phoneNums
    SQLBindParameter(hdlStmt, 3, SQL_PARAM_INPUT, SQL_C_CHAR, SQL_CHAR,
        15, 0, (SQLPOINTER)phoneNums, 15, NULL);
    if(!SQL_SUCCEEDED(ret)) {
        reportError<SQLHDBC>( SQL_HANDLE_STMT, hdlStmt );
        exit(EXIT_FAILURE);
    } else {
        printf("Bound phoneNums array to prepared statement\n");
    }
    // Set up a variable to recieve number of parameters processed.
    SQLULEN rowsProcessed;
    // Set a statement attribute to point to the variable
    SQLSetStmtAttr(hdlStmt, SQL_ATTR_PARAMS_PROCESSED_PTR, &rowsProcessed, 0);
    // Set up an array to hold the result of each row insert
    SQLUSMALLINT   rowResults[ NUM_ENTRIES ];
    // Set a statement attribute to point to the array
    SQLSetStmtAttr(hdlStmt, SQL_ATTR_PARAM_STATUS_PTR, rowResults, 0);
    // Tell the ODBC driver how many rows we have in the
    // array.
    SQLSetStmtAttr(hdlStmt, SQL_ATTR_PARAMSET_SIZE, (SQLPOINTER)NUM_ENTRIES, 0);
    // Add multiple batches to the database. This just adds the same
    // batch of data over and over again for simplicity's sake.
    for (int batchLoop=1; batchLoop<=5; batchLoop++) {
        // Execute the prepared statement, loading all of the data
        // in the arrays.
        printf("Adding Batch #%d...", batchLoop);
        ret = SQLExecute(hdlStmt);
        if(!SQL_SUCCEEDED(ret)) {
            reportError<SQLHDBC>( SQL_HANDLE_STMT, hdlStmt );
            exit(EXIT_FAILURE);
        }
        // Number of rows processed is in rowsProcessed
        printf("Params processed: %d\n", rowsProcessed);
        printf("Results of inserting each row:\n");
        int i;
        for (i = 0; i<NUM_ENTRIES; i++) {
            SQLUSMALLINT result = rowResults[i];
            switch(rowResults[i]) {
                case SQL_PARAM_SUCCESS:
                case SQL_PARAM_SUCCESS_WITH_INFO:
                    printf("  Row %d inserted successsfully\n", i+1);
                    break;
                case SQL_PARAM_ERROR:
                    printf("  Row %d was not inserted due to an error.", i+1);
                    break;
                default:
                    printf("  Row %d had some issue with it: %d\n", i+1, result);
            }
        }
    }
    // Done with batches, commit the transaction
    printf("Commit Transaction\n");
    ret = SQLEndTran(SQL_HANDLE_DBC, hdlDbc, SQL_COMMIT);
    if(!SQL_SUCCEEDED(ret)) {
        reportError<SQLHDBC>( SQL_HANDLE_STMT, hdlStmt );
    }


    // Clean up
    printf("Free handles.\n");
    ret = SQLDisconnect( hdlDbc );
    if(!SQL_SUCCEEDED(ret)) {
        printf("Error disconnecting. Transaction still open?\n");
        exit(EXIT_FAILURE);
    }
    SQLFreeHandle(SQL_HANDLE_STMT, hdlStmt);
    SQLFreeHandle(SQL_HANDLE_DBC, hdlDbc);
    SQLFreeHandle(SQL_HANDLE_ENV, hdlEnv);
    exit(EXIT_SUCCESS);
}