Question

当我执行SQLExecute函数时，它总是返回我＆＃34; [Microsoft] [SQL Server Native Client 10.0]字符串数据，右截断＆＃34;当我的参数超过8k字节。我将粘贴下面的代码。我正在尝试做的事情：在SQL Server 2008 R2中通过ODBC驱动程序（Visual C ++ 2008）通过存储过程将XML文件存储在声明为varbinary（max）的列中。 SP从varchar转换为varbinary调用SET @XML_FILE_BIN = CONVERT(VARBINARY(MAX), @XML_FILE) 如果我尝试将整个XML粘贴到SQL Server Management Studio中，它可以正常工作。我认为SQLBindParameter中的绑定有问题。代码：

char* cXmlBuf; it contains my buffer
retcode = SQLBindParameter(
    hstmt,              //StatementHandle
    1,                  //ParameterNumber
    SQL_PARAM_INPUT,    //InputOutputType
    SQL_C_CHAR,         //ValueType
    SQL_CHAR,           //ParameterType
    SQL_DESC_LENGTH,    //ColumnSize
    0,                  //DecimalDigits
    cXmlBuf,            //ParameterValuePtr
    bufLenght,          //BufferLength
    &cbXml              //StrLen_or_IndPtr
);

if (retcode != SQL_SUCCESS && retcode != SQL_SUCCESS_WITH_INFO)
    return;

SWORD id = 0;
SQLINTEGER cbId = 0;
retcode = SQLBindParameter(hstmt, 2, SQL_PARAM_OUTPUT, SQL_C_SSHORT, SQL_INTEGER, 0, 0, &id, 0, &cbId);

if (retcode != SQL_SUCCESS && retcode != SQL_SUCCESS_WITH_INFO)
    return;

retcode = SQLPrepare(hstmt, (SQLCHAR*)"{CALL MY_STORE_PROC(?, ?)}", SQL_NTS);

if (retcode != SQL_SUCCESS && retcode != SQL_SUCCESS_WITH_INFO)
    return;

retcode = SQLFreeStmt(hstmt, SQL_CLOSE); // Clear any cursor state
retcode = SQLExecute(hstmt);
//in this part retcode is -1 and "[Microsoft][SQL Server Native Client     
//10.0]String data, right truncation" is returned if my XML buffer
//has more than 8k

Answer 1

发现它！我已宣布SQLINTEGER cbXml = SQL_NTS;而非SQLLEN cbXml = 0; 感谢。

SQLExecute总是返回＆＃34; [Microsoft] [SQL Server Native Client 10.0]字符串数据，右截断＆＃34;参数超过8k

1 个答案: