SQLSetStmtAttr

SQLSetStmtAttr

函数定义：

Stmt是用来执行SQL语句的句柄，这个函数是用来设置她的属性的SQLRETURN SQLSetStmtAttr(     SQLHSTMT     StatementHandle,     SQLINTEGER     Attribute,     SQLPOINTER     ValuePtr,     SQLINTEGER     StringLength); 

参数详解：

ConnectionHandle ：输入变量连接的句柄Attribute ：输入变量                        ValuePtr：输入变量

Attribute	ValuePtr contents
SQL_ATTR_APP_PARAM_DESC (ODBC 3.0)	设置APP参数描述
SQL_ATTR_APP_ROW_DESC (ODBC 3.0)	设置APP行描述
SQL_ATTR_ASYNC_ENABLE (ODBC 1.0)	设置异步开关  SQL_ASYNC_ENABLE_OFF = Off 默认值 SQL_ASYNC_ENABLE_ON = On
SQL_ATTR_CONCURRENCY (ODBC 2.0)	设置并发属性  SQL_CONCUR_READ_ONLY = 默认值，指针设为只读，不能进行更新操作 SQL_CONCUR_LOCK = 游标用最低等级的锁，保证行更新得到充分的保障 SQL_CONCUR_ROWVER = 乐观并发模式通过行的属性以及时间戳来决定 SQL_CONCUR_VALUES = 乐观并发模式通过比较取值决定
SQL_ATTR_CURSOR_SCROLLABLE (ODBC 3.0)	设置游标滚动  SQL_NONSCROLLABLE = 设置不依赖于statement handle如果调用SQLFetchScroll 取值将会是SQL_FETCH_NEXT，这是默认值 SQL_SCROLLABLE = 依赖于 statement handle当调用 SQLFetchScroll会返回很多可取值，取值参考Scrollable Cursors和 Cursor Characteristics and Cursor Type
SQL_ATTR_CURSOR_SENSITIVITY (ODBC 3.0)	设置游标敏感度，当当前结果集被其他游标改动是，会返回最近的取值  SQL_UNSPECIFIED 默认值，当statement句柄被其他游标进行了显著改动时，该游标可能进行变化，也可能不变 SQL_INSENSITIVE 只读游标，当statement句柄被其他指针改变时，该游标并不会反映出改动 SQL_SENSITIVE反映出改动  详情请见 Cursor Characteristics and Cursor Type.
SQL_ATTR_CURSOR_TYPE (ODBC 2.0)	游标种类  SQL_CURSOR_FORWARD_ONLY 默认值，只能向前滚动 SQL_CURSOR_STATIC 结果集数据必须为静态的 SQL_CURSOR_KEYSET_DRIVEN 驱动保留使用行号的键值来移动，键值由 SQL_ATTR_KEYSET_SIZE 属性所决定. SQL_CURSOR_DYNAMIC 驱动保留并只使用行号的键值来移动  更多信息参考 Scrollable Cursor Types及Cursor Characteristics and Cursor Type.
SQL_ATTR_ENABLE_AUTO_IPD (ODBC 3.0)	是否展现automatic population of the IPD: SQL_TRUE  SQL_FALSE 详细请参考 Automatic Population of the IPD.
SQL_ATTR_FETCH_BOOKMARK_PTR (ODBC 3.0)	一个指向二进制书签的指针
SQL_ATTR_IMP_PARAM_DESC (ODBC 3.0)	IPD句柄
SQL_ATTR_IMP_ROW_DESC (ODBC 3.0)	IRD句柄
SQL_ATTR_KEYSET_SIZE (ODBC 2.0)	keyset-driven游标的数量. 默认值是0, 这是由游标是完全的 keyset-driven游标. 如果大于 0, 那么就是混合的动态游标
SQL_ATTR_MAX_LENGTH (ODBC 1.0)	指定驱动返回数据数量的最大值
SQL_ATTR_MAX_ROWS (ODBC 1.0)	指定驱动返回的最大行数
SQL_ATTR_METADATA_ID (ODBC 3.0)	确定catalog函数如何处理字符串变量. If SQL_TRUE标识符 If SQL_FALSE非标识符
SQL_ATTR_NOSCAN (ODBC 1.0)	驱动是否扫描字符串的转义序列: SQL_NOSCAN_OFF 默认值，扫描 SQL_NOSCAN_ON 不扫描，直接向数据源发送请求 For more information, see Escape Sequences in ODBC.
SQL_ATTR_PARAM_BIND_OFFSET_PTR (ODBC 3.0)	添加动态参数绑定指针，默认为null
SQL_ATTR_PARAM_BIND_TYPE (ODBC 3.0)	动态参数的绑定方向 SQL_PARAM_BIND_BY_COLUMN 默认值，以列为方向
SQL_ATTR_PARAM_OPERATION_PTR (ODBC 3.0)	在SQL statement执行时，忽略参数SQL_PARAM_PROCEED 参数不忽略 SQL_PARAM_IGNORE参数忽略
SQL_ATTR_PARAM_STATUS_PTR (ODBC 3.0)	执行SQLExecute 或 SQLExecDirect后，一个指向每行参数的状态信息数组的指针. 只有当 PARAMSET_SIZE 大于 1 才可以使用. 取值: SQL_PARAM_SUCCESS: 参数成功执行 SQL_PARAM_SUCCESS_WITH_INFO: 成功但是在数据结构的诊断中可能出错 SQL_PARAM_ERROR: 执行过程中出错 SQL_PARAM_UNUSED: 之前的参数可能造车此次之行参数被忽略而未使用 SQL_PARAM_IGNORE被 SQL_ATTR_PARAM_OPERATION_PTR制定的参数忽略 SQL_PARAM_DIAG_UNAVAILABLE: 驱动把参数集当做完整的一个单元，并不会产生错误信息的等级 For more information, see Using Arrays of Parameters.
SQL_ATTR_PARAMS_PROCESSED_PTR (ODBC 3.0)	指向一个数组的指针用来记录执行过的参数集，包括执行错误的 For more information, see Using Arrays of Parameters.
SQL_ATTR_PARAMSET_SIZE (ODBC 3.0)	指定每个参数的取值个数. If SQL_ATTR_PARAMSET_SIZE大于1, SQL_DESC_DATA_PTR, SQL_DESC_INDICATOR_PTR, and SQL_DESC_OCTET_LENGTH_PTR of the APD 指向数组. For more information, see Using Arrays of Parameters.
SQL_ATTR_QUERY_TIMEOUT (ODBC 1.0)	在执行结果返回应用程序之前的等待时间，单位秒. 如果 ValuePtr为 0 (默认), 立即返回.
SQL_ATTR_RETRIEVE_DATA (ODBC 2.0)	An SQLUINTEGER value: SQL_RD_ON = SQLFetchScroll and, in ODBC 3.x, 当游标的位置到了指定的地方时SQLFetch 取回数据默认值 SQL_RD_OFF = SQLFetchScroll and, in ODBC 3.x, SQLFetch 不取回.
SQL_ATTR_ROW_ARRAY_SIZE (ODBC 3.0)	当执行 SQLFetch or SQLFetchScroll和SQLBulkOperations返回行数.默认值是 1.
SQL_ATTR_ROW_BIND_OFFSET_PTR (ODBC 3.0)	替换列绑定指针，非空
SQL_ATTR_ROW_BIND_TYPE (ODBC 1.0)	当 SQLFetch ， SQLFetchScroll 被使用时，确定绑定方向. 列方向绑定用 SQL_BIND_BY_COLUMN. For more information, see Binding Columns for Use with Block Cursors.
SQL_ATTR_ROW_NUMBER (ODBC 2.0)	当前结果集中的行数，如果不能确定或者没有驱动返回 0.
SQL_ATTR_ROW_OPERATION_PTR (ODBC 3.0)	当bulk操作时，忽略行 SQL_ROW_PROCEED 行包括在bulk操作中 SQL_ROW_IGNORE 行被排除在bulk操作外 For more information, see Updating Rows in the Rowset with SQLSetPos andDeleting Rows in the Rowset with SQLSetPos.
SQL_ATTR_ROW_STATUS_PTR (ODBC 3.0)	当 SQLFetch 或 SQLFetchScroll时行状态描述数组.
SQL_ATTR_ROWS_FETCHED_PTR (ODBC 3.0)	SQLFetch 或 SQLFetchScroll后行数
SQL_ATTR_SIMULATE_CURSOR (ODBC 2.0)	模拟位置更新删除操作只影响一行。 SQL_SC_NON_UNIQUE = 可能影响多行 SQL_SC_TRY_UNIQUE = 尽量影响一行 SQL_SC_UNIQUE = 只影响一行
SQL_ATTR_USE_BOOKMARKS (ODBC 2.0)	是否用带bookmarks的游标: SQL_UB_OFF = Off (the default) SQL_UB_VARIABLE = 用，如果支持还会提供变长的bookmarks.  SQL_UB_FIXED 总是用变长的bookmarks 如果要使用带bookmarks的游标，需要先指定SQL_UB_VARIABLE 的属性再打开游标. For more information, see Retrieving Bookmarks.

 StringLength ：输入变量如果ValuePtr 为字符串，填入字符串长度或者SQL_NTS.如果是二进制缓存填入 SQL_LEN_BINARY_ATTR(length) 的结果If ValuePtr is a pointer to a不是上述两个填入SQL_IS_POINTER.如果是边长的数组根据情况填入SQL_IS_INTEGER 或者SQL_IS_UINTEGER

返回值：

返回值有四种：SQL_SUCCESS, SQL_SUCCESS_WITH_INFO, SQL_INVALID_HANDLE, or SQL_ERROR.查看详细错误信息可调用SQLGetDiagRec 函数（之后章节讲解）。

用法：

实在太多无法一一举例，暂且举部分char sql2[1000]={0};char str_rs_out[30]={0};SQLHENV  henv = NULL;SQLHDBC  hdbc = NULL;SQLHSTMT hstmt = NULL;SQLHDESC hdesc=NULL;int arm_rs;SQLPOINTER ptr= (char* )malloc(20); SQLCHAR err_msg[512]={0};SQLCHAR sqlstat[10]={0};SQLINTEGER no_er=0;rs = SQLAllocHandle(SQL_HANDLE_ENV,SQL_NULL_HANDLE,&henv);rs = SQLSetEnvAttr(henv,SQL_ATTR_ODBC_VERSION,(SQLPOINTER)SQL_OV_ODBC3,SQL_IS_INTEGER);rs = SQLAllocHandle(SQL_HANDLE_DBC,henv,&hdbc);rs = SQLConnect(hdbc,(UCHAR*)szDSN,SQL_NTS,(UCHAR*)szUID ,SQL_NTS,(UCHAR*)szAuthStr,SQL_NTS);rs = SQLAllocHandle(SQL_HANDLE_STMT,hdbc,&hstmt);1. 设置语句句柄属性游标滚动rs =SQLSetStmtAttr(hstmt,SQL_ATTR_CURSOR_SCROLLABLE,SQL_NONSCROLLABLE,SQL_NTS);2. 设置语句句柄属性游标滚动（错误示例）rs =SQLSetStmtAttr(NULL,SQL_ATTR_CURSOR_SCROLLABLE,(SQLPOINTER)SQL_SCROLLABLE,SQL_NTS);3. 设置语句句柄属性游标滚动rs =SQLSetStmtAttr(hstmt,SQL_ATTR_CURSOR_SCROLLABLE,(SQLPOINTER)SQL_SCROLLABLE,SQL_NTS);4. 设置语句句柄属性游标滚动IPDrs =SQLSetStmtAttr(hstmt,SQL_ATTR_AUTO_IPD,(SQLPOINTER)SQL_TRUE,0);rs1=SQLGetDiagRec(SQL_HANDLE_STMT,hstmt,1,sqlstat,&no_er,err_msg,512,&len);rs =SQLSetStmtAttr(hstmt,SQL_ATTR_AUTO_IPD,(SQLPOINTER)SQL_FALSE,0);5. 设置语句句柄属性 SQL_ATTR_PARAM_STATUS_PTRrs =SQLSetStmtAttr(hstmt,SQL_ATTR_PARAM_STATUS_PTR,(SQLPOINTER)NULL,SQL_NTS);rs =SQLSetStmtAttr(hstmt,SQL_ATTR_PARAM_STATUS_PTR,(SQLPOINTER)ptr,SQL_NTS);int r1,r2,r3,r4;r1= SQL_PARAM_SUCCESS;r2=SQL_PARAM_SUCCESS_WITH_INFO;r3=SQL_PARAM_ERROR;r4= SQL_PARAM_UNUSED;r1=SQL_PARAM_DIAG_UNAVAILABLE;6. 设置语句句柄属性 PARAMS_PROCESSED_PTRrs =SQLSetStmtAttr(hstmt,SQL_ATTR_PARAMS_PROCESSED_PTR,(SQLPOINTER)ptr,SQL_NTS);//指向一个buffer 用以返回 参数集（sets of parameters）中被处理过的参数的数量rs=SQLGetStmtAttr(hstmt,SQL_ATTR_PARAMS_PROCESSED_PTR,(SQLPOINTER)ptr,100,&rp);7. 设置语句句柄属性 SQL_ATTR_PARAM_BIND_OFFSET_PTRrs =SQLSetStmtAttr(hstmt,SQL_ATTR_PARAM_BIND_OFFSET_PTR,(SQLPOINTER)ptr,SQL_NTS);//about parameter binding : two parts 2.0不支持rs=SQLGetStmtAttr(hstmt,SQL_ATTR_PARAM_BIND_OFFSET_PTR,(SQLPOINTER)ptr,100,&rp);8. 设置语句句柄属性 SQL_ATTR_PARAM_BIND_TYPErs =SQLSetStmtAttr(hstmt,SQL_ATTR_PARAM_BIND_TYPE,(SQLPOINTER)SQL_PARAM_BIND_BY_COLUMN,SQL_NTS);//the default valuers=SQLGetStmtAttr(hstmt,SQL_ATTR_PARAM_BIND_TYPE,(SQLPOINTER)ptr,100,&rp);9. 设置语句句柄属性 SQL_ATTR_PARAMSET_SIZErs =SQLSetStmtAttr(hstmt,SQL_ATTR_PARAMSET_SIZE,(SQLPOINTER)1,SQL_NTS);//一个参数的值的个数，大于1 的就是描述的内容了rs=SQLGetStmtAttr(hstmt,SQL_ATTR_PARAMSET_SIZE,(SQLPOINTER)ptr,100,&rp);10. 设置语句句柄属性 SQL_ATTR_ROW_ARRAY_SIZErs =SQLSetStmtAttr(hstmt,SQL_ATTR_ROW_ARRAY_SIZE,(SQLPOINTER)1,SQL_NTS);rs=SQLGetStmtAttr(hstmt,SQL_ATTR_ROW_ARRAY_SIZE,(SQLPOINTER)ptr,100,&rp);11. 设置语句句柄属性 SQL_ATTR_ROW_NUMBERchar sql[1000]={0};sprintf(sql,"select a,b,c fromd where item='%s' ","SQL");rs =SQLExecDirect(hstmt,(UCHAR*)sql,strlen(sql));SQLLEN cbLen1 ;char ci1[100]={0};SQLBindCol(hstmt, 1, SQL_C_CHAR, ci1, 100, &cbLen1);rs=SQLFetch(hstmt);rs=SQLGetStmtAttr(hstmt,SQL_ATTR_ROW_NUMBER,(SQLPOINTER)ptr,100,&rp);memset(ptr,0x0,100);rs1=SQLGetStmtAttr(hstmt,SQL_ATTR_ROW_OPERATION_PTR,(SQLPOINTER)ptr,100,&rp);memset(ptr,0x0,100);rs1=SQLGetStmtAttr(hstmt,SQL_ATTR_ROW_STATUS_PTR,(SQLPOINTER)ptr,100,&rp);memset(ptr,0x0,100);rs1=SQLGetStmtAttr(hstmt,SQL_ATTR_ROWS_FETCHED_PTR,(SQLPOINTER)ptr,100,&rp);12. 设置语句句柄属性 SQL_ATTR_ROW_OPERATION_PTRrs =SQLSetStmtAttr(hstmt,SQL_ATTR_ROW_OPERATION_PTR,(SQLPOINTER)ptr,SQL_NTS);rs=SQLGetStmtAttr(hstmt,SQL_ATTR_ROW_OPERATION_PTR,(SQLPOINTER)ptr,100,&rp);13. 设置语句句柄属性 SQL_ATTR_ROW_STATUS_PTRrs =SQLSetStmtAttr(hstmt,SQL_ATTR_ROW_STATUS_PTR,(SQLPOINTER)ptr,SQL_NTS);rs=SQLGetStmtAttr(hstmt,SQL_ATTR_ROW_STATUS_PTR,(SQLPOINTER)ptr,100,&rp);14. 设置语句句柄属性 SQL_ATTR_ROWS_FETCHED_PTRrs =SQLSetStmtAttr(hstmt,SQL_ATTR_ROWS_FETCHED_PTR,(SQLPOINTER)ptr,SQL_NTS);rs=SQLGetStmtAttr(hstmt,SQL_ATTR_ROWS_FETCHED_PTR,(SQLPOINTER)ptr,100,&rp);15. 设置语句句柄属性 SQL_ATTR_SIMULATE_CURSORrs =SQLSetStmtAttr(hstmt,SQL_ATTR_SIMULATE_CURSOR,(SQLPOINTER)4,SQL_NTS);rs=SQLGetStmtAttr(hstmt,SQL_ATTR_SIMULATE_CURSOR,(SQLPOINTER)ptr,100,&rp);16. 设置语句句柄属性 SQL_ATTR_ASYNC_ENABLErs =SQLSetStmtAttr(hstmt,SQL_ATTR_ASYNC_ENABLE,(SQLPOINTER)SQL_ASYNC_ENABLE_OFF,0);rs=SQLGetStmtAttr(hstmt,SQL_ATTR_ASYNC_ENABLE,(SQLPOINTER)ptr,100,&rp);rs =SQLSetStmtAttr(hstmt,SQL_ATTR_ASYNC_ENABLE,(SQLPOINTER)SQL_ASYNC_ENABLE_ON,0);rs=SQLGetStmtAttr(hstmt,SQL_ATTR_ASYNC_ENABLE,(SQLPOINTER)ptr,100,&rp);17. 设置语句句柄属性 SQL_ATTR_CURSOR_SENSITIVITYrs =SQLSetStmtAttr(hstmt,SQL_ATTR_CURSOR_SENSITIVITY,(SQLPOINTER)SQL_UNSPECIFIED,0);rs=SQLGetStmtAttr(hstmt,SQL_ATTR_CURSOR_SENSITIVITY,(SQLPOINTER)ptr,100,&rp);rs =SQLSetStmtAttr(hstmt,SQL_ATTR_CURSOR_SENSITIVITY,(SQLPOINTER)1,0);rs=SQLGetStmtAttr(hstmt,SQL_ATTR_CURSOR_SENSITIVITY,(SQLPOINTER)ptr,100,&rp);18. 设置语句句柄属性 SQL_ATTR_CURSOR_TYPErs =SQLSetStmtAttr(hstmt,SQL_ATTR_CURSOR_TYPE,(SQLPOINTER)SQL_CURSOR_KEYSET_DRIVEN,0);rs =SQLSetStmtAttr(hstmt,SQL_ATTR_CURSOR_TYPE,(SQLPOINTER)SQL_CURSOR_STATIC,0);rs=SQLGetStmtAttr(hstmt,SQL_ATTR_CURSOR_TYPE,(SQLPOINTER)ptr,100,&rp);rs =SQLSetStmtAttr(hstmt,SQL_ATTR_CURSOR_TYPE,(SQLPOINTER)SQL_CURSOR_FORWARD_ONLY,0);rs=SQLGetStmtAttr(hstmt,SQL_ATTR_CURSOR_TYPE,(SQLPOINTER)ptr,100,&rp);19. 设置语句句柄属性 SQL_ATTR_MAX_LENGTHrs =SQLSetStmtAttr(hstmt,SQL_ATTR_MAX_LENGTH,(SQLPOINTER)128,0);//uintrs=SQLGetStmtAttr(hstmt,SQL_ATTR_MAX_LENGTH,(SQLPOINTER)ptr,100,&rp);20. 设置语句句柄属性 SQL_ATTR_MAX_ROWSrs =SQLSetStmtAttr(hstmt,SQL_ATTR_MAX_ROWS,(SQLPOINTER)1280000,0);rs=SQLGetStmtAttr(hstmt,SQL_ATTR_MAX_ROWS,(SQLPOINTER)ptr,100,&rp);21. 设置语句句柄属性 SQL_ATTR_METADATA_IDrs =SQLSetStmtAttr(hstmt,SQL_ATTR_METADATA_ID,(SQLPOINTER)SQL_TRUE,0);rs=SQLGetStmtAttr(hstmt,SQL_ATTR_METADATA_ID,(SQLPOINTER)ptr,100,&rp);rs =SQLSetStmtAttr(hstmt,SQL_ATTR_METADATA_ID,(SQLPOINTER)SQL_FALSE,0);rs=SQLGetStmtAttr(hstmt,SQL_ATTR_METADATA_ID,(SQLPOINTER)ptr,100,&rp);22. 设置语句句柄属性 SQL_ATTR_RETRIEVE_DATArs =SQLSetStmtAttr(hstmt,SQL_ATTR_RETRIEVE_DATA,(SQLPOINTER)SQL_TRUE,0);rs=SQLGetStmtAttr(hstmt,SQL_ATTR_RETRIEVE_DATA,(SQLPOINTER)ptr,100,&rp);23. 设置语句句柄属性 SQL_ATTR_ROW_BIND_TYPErs =SQLSetStmtAttr(hstmt,SQL_ATTR_ROW_BIND_TYPE,(SQLPOINTER)SQL_BIND_BY_COLUMN,0);rs=SQLGetStmtAttr(hstmt,SQL_ATTR_ROW_BIND_TYPE,(SQLPOINTER)ptr,100,&rp);24. 设置语句句柄属性 SQL_ATTR_ROW_BIND_OFFSET_PTRrs =SQLSetStmtAttr(hstmt,SQL_ATTR_ROW_BIND_OFFSET_PTR,(SQLPOINTER)ptr,SQL_NTS);rs=SQLGetStmtAttr(hstmt,SQL_ATTR_ROW_BIND_OFFSET_PTR,(SQLPOINTER)ptr,100,&rp);25. 设置语句句柄属性 SQL_ATTR_QUERY_TIMEOUTrs =SQLSetStmtAttr(hstmt,SQL_ATTR_QUERY_TIMEOUT,(SQLPOINTER)3600,0);rs=SQLGetStmtAttr(hstmt,SQL_ATTR_QUERY_TIMEOUT,(SQLPOINTER)ptr,100,&rp);26. 设置语句句柄属性 SQL_ATTR_KEYSET_SIZErs =SQLSetStmtAttr(hstmt,SQL_ATTR_KEYSET_SIZE,(SQLPOINTER)3600,0);rs=SQLGetStmtAttr(hstmt,SQL_ATTR_KEYSET_SIZE,(SQLPOINTER)ptr,100,&rp);27. 设置语句句柄属性 SQL_ATTR_NOSCANrs =SQLSetStmtAttr(hstmt,SQL_ATTR_NOSCAN,(SQLPOINTER)1,0);rs=SQLGetStmtAttr(hstmt,SQL_ATTR_NOSCAN,(SQLPOINTER)ptr,100,&rp);28. 设置语句句柄属性 SQL_ATTR_ROW_OPERATION_PTRrs =SQLSetStmtAttr(hstmt,SQL_ATTR_ROW_OPERATION_PTR,(SQLPOINTER)ptr,SQL_NTS);rs=SQLGetStmtAttr(hstmt,SQL_ATTR_ROW_OPERATION_PTR,(SQLPOINTER)ptr,100,&rp);29. 设置语句句柄属性 SQL_ATTR_CONCURRENCYrs =SQLSetStmtAttr(hstmt,SQL_ATTR_CONCURRENCY,(SQLPOINTER)ptr,SQL_NTS);rs=SQLGetStmtAttr(hstmt,SQL_ATTR_CONCURRENCY,(SQLPOINTER)ptr,100,&rp);30. 设置语句句柄属性 SQL_ATTR_FETCH_BOOKMARK_PTRrs =SQLSetStmtAttr(hstmt,SQL_ATTR_FETCH_BOOKMARK_PTR,(SQLPOINTER)ptr,SQL_NTS);rs=SQLGetStmtAttr(hstmt,SQL_ATTR_FETCH_BOOKMARK_PTR,(SQLPOINTER)ptr,100,&rp);31. 设置语句句柄属性 SQL_ATTR_USE_BOOKMARKSrs =SQLSetStmtAttr(hstmt,SQL_ATTR_USE_BOOKMARKS,(SQLPOINTER)1,0);rs=SQLGetStmtAttr(hstmt,SQL_ATTR_USE_BOOKMARKS,(SQLPOINTER)ptr,100,&rp);32. 设置语句句柄属性 SQL_ATTR_PARAM_OPERATION_PTRrs =SQLSetStmtAttr(hstmt,SQL_ATTR_PARAM_OPERATION_PTR,(SQLPOINTER)ptr,SQL_NTS);rs=SQLGetStmtAttr(hstmt,SQL_ATTR_PARAM_OPERATION_PTR,(SQLPOINTER)ptr,100,&rp);33. 设置语句句柄属性 SQL_ATTR_IMP_ROW_DESCrs=SQLGetStmtAttr(hstmt,SQL_ATTR_APP_ROW_DESC,(SQLPOINTER)&hdesc,4,&rp);34. 设置语句句柄属性 SQL_ATTR_IMP_PARAM_DESCsprintf(sql2,"insert into t1 values(?)");rs1=SQLPrepare(hstmt,(SQLCHAR*)sql2,SQL_NTS);clen=4;rs1=SQLBindParameter(hstmt,1,SQL_PARAM_INPUT,SQL_C_LONG,SQL_INTEGER,10,0,&numattr_value,10,&clen);rs=SQLGetStmtAttr(hstmt,SQL_ATTR_APP_PARAM_DESC,(SQLPOINTER)&hdesc,4,&rp);35. 设置语句句柄属性 SQL_ATTR_APP_ROW_DESCsprintf(sql2,"select * from t1;");rs1 =SQLExecDirect(hstmt,(UCHAR*)sql2,strlen(sql2));SQLLEN cbLen1 ;char ci1[100]={0};SQLBindCol(hstmt, 1, SQL_C_CHAR, ci1, 100, &cbLen1);rs=SQLGetStmtAttr(hstmt,SQL_ATTR_IMP_ROW_DESC,(SQLPOINTER)&hdesc,4,&rp);rs1++;36. 设置语句句柄属性 SQL_ATTR_APP_PARAM_DESCsprintf(sql2,"insert into t1 values(?)");rs1=SQLPrepare(hstmt,(SQLCHAR*)sql2,SQL_NTS);clen=4;rs1=SQLBindParameter(hstmt,1,SQL_PARAM_INPUT,SQL_C_LONG,SQL_INTEGER,10,0,&numattr_value,10,&clen);rs=SQLGetStmtAttr(hstmt,SQL_ATTR_IMP_PARAM_DESC,(SQLPOINTER)&hdesc,100,&rp);rs1++;