]]>
Quote:
|
Originally Posted by Dave Rush
I have a problem compiling my embedded sql:
db2 prep Dbprog.sqc bindfile gave me the following error. 172 SQL0008N The token "int" found in a host variable declaration is not valid. Is seems that the precompiler do not accept the int declarations, it accept only short or long. Is there a way to tell the precompiler to accept int variable like this EXEC SQL BEGIN DECLARE SECTION; int maj = 0; int min = 0; char pch = 0; EXEC SQL END DECLARE SECTION; Thanks |
鏀規(guī)垚long紜疄灝卞彲浠ヤ簡銆?br>
]]>
淇濇寔娓告爣鎵撳紑鐨勬柟娉曟槸鍦ㄥ畾涔夋父鏍囨椂鍔犱笂with hold閫夐」
浣嗘槸錛屾垜declare 娓告爣鏃朵嬌鐢ㄤ簡with hold閫夐」--鍙commit鏈夋晥銆?br>
紼嬪簭孌碉細
declare test_cur cursor with hold for
select .... from A where ... order by ... with ur;
open test_cur;
while( 1 ){
fecth test_cur into ......;
鍒ゆ柇SQLCODE
begin_work(); /* 鍏跺疄灝辨槸璁劇疆浜嗕竴涓爣蹇?*/
SQL 鎿嶄綔錛屼慨鏀瑰叾浠栬〃鎴栬呮父鏍囨墍鍦ㄨ〃鐨勬暟鎹?br> 鏍規(guī)嵁緇撴灉鍒ゆ柇 commit or rollback銆?nbsp; /* 姝ゅ濡傛灉rollback 娓告爣琚叧闂?*/
}
寮傚父鐘舵侊細
濡傛灉娓告爣涓繘琛屼簡SQL鎿嶄綔錛屾牴鎹粨鏋滃垽鏂茍rollback鏃訛紝
涓嬩竴嬈etch鏃訛紝浼氭彁紺?501 娌℃湁鎵撳紑娓告爣銆備粠鑰屾姤閿欓鍑恒?br>
榪欑鏂規(guī)鏄惁鍙
娓告爣鏀圭敤鏅氭父鏍囥?br>娓告爣鍙栧嚭褰撳墠璁板綍鍚庯紝fork瀛愯繘紼嬨?br>涓昏繘紼嬪彧綆′粠娓告爣鍙栨暟銆?br>瀛愯繘紼嬭繘琛屼簨鍔°佸鐞嗐佸垽鏂佷慨鏀圭姸鎬併佹彁浜ょ瓑絳夈?br>涓昏繘紼嬬瓑瀛愯繘紼嬬殑緇撴潫淇″彿錛岀劧鍚庡彇涓嬩竴鏉¤褰曘?br>紼嬪簭孌碉細
declare test_cur cursor with hold for
select .... from A where ... order by ... with ur;
open test_cur;
while( 1 ){
fecth test_cur into ......;
鍒ゆ柇SQLCODE
pid = fork();
if( pid == 0 ) { /* 瀛愯繘紼嬪共媧?*/
sqledtin( &sqlca );
setsid();
signal( SIGHUP, SIG_IGN );
db_disconn( G_mdb_name );
begin_work(); /* 鍏跺疄灝辨槸璁劇疆浜嗕竴涓爣蹇?*/
SQL 鎿嶄綔錛屼慨鏀瑰叾浠栬〃鎴栬呮父鏍囨墍鍦ㄨ〃鐨勬暟鎹?br> 鏍規(guī)嵁緇撴灉鍒ゆ柇 commit or rollback銆?nbsp;
db_disconn();
exit();
}
/* 涓昏繘紼嬬瓑寰呭瓙榪涚▼緇撴潫 */
}
close test_cur;
declare test_cur cursor with hold for
select .... from A where ... order by ... with ur;
open test_cur;
while( 1 ){
fecth test_cur into ......;
鍒ゆ柇SQLCODE
pid = fork();
if( pid == 0 ) { /* 瀛愯繘紼嬪共媧?*/
sqledtin( &sqlca );
setsid();
signal( SIGHUP, SIG_IGN );
db_disconn( G_mdb_name );
begin_work(); /* 鍏跺疄灝辨槸璁劇疆浜嗕竴涓爣蹇?*/
SQL 鎿嶄綔錛屼慨鏀瑰叾浠栬〃鎴栬呮父鏍囨墍鍦ㄨ〃鐨勬暟鎹?br> 鏍規(guī)嵁緇撴灉鍒ゆ柇 commit or rollback銆?nbsp;
db_disconn();
exit();
}
/* 涓昏繘紼嬬瓑寰呭瓙榪涚▼緇撴潫 */
}
close test_cur;
濡傛灉鏄袱涓笉鍚岀殑浜嬪姟鐨勮瘽錛屼綘鐢–LI鏉ュ啓姣旇緝鏂逛究
鍦╟ursor鍐呴儴璁劇珛涓涓猻avepoint, rollback鏃剁敤
rollback to savepoint a;
rollback to savepoint a;
]]>
cc -o len len.o -q64 -L/home/sqllib/lib64 -ldb2
len.o:len.c
cc -c -g -q64 -I/home/sqllib/include/ len.c
clean:
rm -f *.o
]]>
SQLAllocStmt() 鍒嗛厤鏂扮殑璇彞鍙ユ焺騫跺皢鍏朵笌榪炴帴鍙ユ焺鎸囧畾鐨勮繛鎺ョ浉鍏寵仈銆傚浜庡湪浠諱綍涓涓椂鍊欏彲浠ュ垎閰嶇殑璇彞鍙ユ焺鏁扮洰娌℃湁宸插畾涔夌殑闄愬埗銆?
鍦ㄨ皟鐢ㄦ鍑芥暟涔嬪墠錛屽繀欏昏皟鐢?SQLConnect()銆?
蹇呴』鍦?SQLBindParam()銆?tt>SQLPrepare()銆丼QLExecute()銆丼QLExecDirect() 鎴栦換浣曞叾瀹冨皢璇彞鍙ユ焺浣滀負鍏朵腑涓涓緭鍏ヨ嚜鍙橀噺鐨勫嚱鏁頒箣鍓嶈皟鐢ㄦ鍑芥暟銆?
璇硶
SQLRETURN SQLAllocStmt (SQLHDBC hdbc,
SQLHSTMT *phstmt);
鍑芥暟鑷彉閲?/strong> 鐢ㄦ硶
DB2 UDB CLI 浣跨敤姣忎釜璇彞鍙ユ焺鏉ヤ嬌鎵鏈夋弿榪扮銆佺粨鏋滃箋佹父鏍囦俊鎭拰鐘舵佷俊鎭笌宸插鐞嗙殑 SQL 璇彞鐩稿叧鑱斻傝櫧鐒舵瘡涓?SQL 璇彞閮藉繀欏昏鏈夎鍙ュ彞鏌勶紝浣嗗彲浠ュ皢鍙ユ焺閲嶆柊鐢ㄤ簬涓嶅悓鐨勮鍙ャ?
瀵規(guī)鍑芥暟鐨勮皟鐢ㄨ姹?hdbc 寮曠敤媧誨姩鐨勬暟鎹簱榪炴帴銆?
瑕佹墽琛屽畾浣嶅瀷鏇存柊鎴栧垹闄わ紝搴旂敤紼嬪簭蹇呴』灝嗕笉鍚岀殑璇彞鍙ユ焺鐢ㄤ簬 SELECT 璇彞鍜?UPDATE 鎴?DELETE 璇彞銆?
濡傛灉鎸囧悜璇彞鍙ユ焺鐨勮緭鍏ユ寚閽堬紙phstmt錛夋寚鍚戠敱鍏堝墠鐨?SQLAllocStmt() 璋冪敤鍒嗛厤鐨勬湁鏁堣鍙ュ彞鏌勶紝鍒欐璋冪敤鐨勭粨鏋滄槸瑕嗙洊鍘熷鍊箋傝繖鏄簲鐢ㄧ▼搴忕紪紼嬮敊璇紝DB2 UDB CLI 涓嶆嫻嬫閿欒銆?
榪斿洖鐮?/strong>
濡傛灉榪斿洖 SQL_ERROR錛屽垯 phstmt 鑷彉閲忚緗負 SQL_NULL_HSTMT銆傚簲鐢ㄧ▼搴忓簲浣跨敤鍚屼竴涓?hdbc 鏉ヨ皟鐢?SQLError() 騫跺皢 hstmt 鑷彉閲忚緗負 SQL_NULL_HSTMT銆?
璇婃柇 璇峰弬鑰?SQLFetch()錛?a >紺轟緥錛夈?
鏁版嵁綾誨瀷
鑷彉閲?
浣跨敤
鎻忚堪
SQLHDBC
hdbc
杈撳叆
榪炴帴鍙ユ焺
SQLHSTMT *
phstmt
杈撳嚭
鎸囧悜璇彞鍙ユ焺鐨勬寚閽?
SQLSTATE
鎻忚堪
璇存槑
08003
榪炴帴鏈墦寮
hdbc 鑷彉閲忔寚瀹氱殑榪炴帴灝氭湭鎵撳紑銆傚繀欏繪垚鍔熷湴涓洪┍鍔ㄧ▼搴忓緩绔嬭繛鎺ワ紙騫朵笖璇ヨ繛鎺ュ繀欏誨凡鎵撳紑錛夋墠鑳藉垎閰?hstmt銆?
40003 *
鏈煡璇彞鏄惁瀹屾垚
鍦ㄥ嚱鏁板畬鎴愬鐞嗕箣鍓嶏紝CLI 涓庢暟鎹簮涔嬮棿鐨勯氫俊閾捐礬鍙戠敓鏁呴殰銆?
58004
緋葷粺閿欒
涓嶅彲鎭㈠鐨勭郴緇熼敊璇?
HY001
鍐呭瓨鍒嗛厤澶辮觸
椹卞姩紼嬪簭鏃犳硶鍒嗛厤鏀寔姝ゅ嚱鏁扮殑鎵ц鎴栧畬鎴愭墍蹇呴渶鐨勫唴瀛樸?
HY009
鑷彉閲忓兼棤鏁?
phstmt 鏄┖鎸囬拡
HY013 *
鍐呭瓨綆＄悊闂
椹卞姩紼嬪簭鏃犳硶璁塊棶鏀寔姝ゅ嚱鏁扮殑鎵ц鎴栧畬鎴愭墍蹇呴渶鐨勫唴瀛樸?
]]>
鐢ㄩ?/strong>
SQLAllocEnv() 鍒嗛厤鐜鍙ユ焺鍜岀浉鍏寵仈鐨勮祫婧愩?
搴旂敤紼嬪簭蹇呴』鍦?SQLAllocConnect() 鎴栦換浣曞叾瀹?DB2 UDB CLI 鍑芥暟涔嬪墠璋冪敤姝ゅ嚱鏁般傚湪浠ュ悗鎵鏈夐渶瑕佺幆澧冨彞鏌勪綔涓鴻緭鍏ョ殑鍑芥暟璋冪敤涓紝閮戒紶閫?henv 鍊箋?
璇硶
鍑芥暟鑷彉閲?/strong> 鐢ㄦ硶
瀵逛簬姣忎釜搴旂敤紼嬪簭錛屽湪浠諱綍涓涓椂鍊欓兘鍙兘鏈変竴涓椿鍔ㄧ幆澧冦備互鍚庝換浣曞 SQLAllocEnv() 鐨勮皟鐢ㄥ皢榪斿洖鐜版湁鐨勭幆澧冨彞鏌勩?
緙虹渷鎯呭喌涓嬶紝瀵?SQLFreeEnv() 鎵浣滅殑絎竴涓垚鍔熻皟鐢ㄥ皢閲婃斁涓庤鍙ユ焺鐩稿叧鑱旂殑璧勬簮銆傛棤璁烘垚鍔熷湴璋冪敤浜嗗灝戞 SQLAllocEnv()錛岄兘浼氬彂鐢熻繖縐嶆儏鍐點傚鏋滅幆澧冨睘鎬?SQL_ATTR_ENVHNDL_COUNTER 璁劇疆涓?SQL_TRUE錛屽垯鍦ㄩ噴鏀句笌鍙ユ焺鐩稿叧鑱旂殑璧勬簮涔嬪墠錛屽繀欏諱負姣忔鎴愬姛鐨?SQLAllocEnv() 璋冪敤鏉ヨ皟鐢?SQLFreeEnv()銆?
瑕佺‘淇濇墍鏈夌殑 DB2 UDB CLI 璧勬簮閮戒繚鎸佹椿鍔ㄧ姸鎬侊紝璋冪敤 SQLAllocEnv() 鐨勭▼搴忎笉搴旂粓姝㈡垨紱誨紑鍫嗘爤銆傚惁鍒欙紝搴旂敤紼嬪簭灝嗕涪澶辨墦寮鐨勬父鏍囥佽鍙ュ彞鏌勫拰鍏跺畠宸插垎閰嶇殑璧勬簮銆?
榪斿洖鐮?/strong>
濡傛灉榪斿洖 SQL_ERROR錛屽茍涓?phenv 絳変簬 SQL_NULL_HENV錛屽垯鐢變簬娌℃湁鍙ユ焺鍙互涓庨檮鍔犵殑璇婃柇淇℃伅鐩稿叧鑱旓紝鎵浠ヤ笉鑳借皟鐢?SQLError()銆?
濡傛灉榪斿洖鐮佹槸 SQL_ERROR錛屽茍涓旀寚鍚戠幆澧冨彞鏌勭殑鎸囬拡涓嶇瓑浜?SQL_NULL_HENV錛屽垯璇ュ彞鏌勬槸鍙楅檺鍙ユ焺銆傝繖琛ㄧず璇ュ彞鏌勫彧鑳藉湪 SQLError() 鐨勮皟鐢ㄤ腑浣跨敤浠ヨ幏鍙栨洿澶氱殑閿欒淇℃伅錛屾垨鑰呯敤浜?SQLFreeEnv() 鐨勮皟鐢ㄣ?
璇婃柇
鏈夊叧浠ｇ爜紺轟緥鐨勪俊鎭紝鍙傝浠ｇ爜涓嶄繚璇佸０鏄庝俊鎭?/font>銆?
鍙傝?/strong>
SQLRETURN SQLAllocEnv (SQLHENV *phenv);
鏁版嵁綾誨瀷
鑷彉閲?
浣跨敤
鎻忚堪
SQLHENV *
phenv
杈撳嚭
鎸囧悜鐜鍙ユ焺鐨勬寚閽?
SQLSTATE
鎻忚堪
璇存槑
58004
緋葷粺閿欒
涓嶅彲鎭㈠鐨勭郴緇熼敊璇?
/*******************************************************
** file = basiccon.c
** - demonstrate basic connection to two datasources.
** - error handling ignored for simplicity
**
** Functions used:
**
** SQLAllocConnect SQLDisconnect
** SQLAllocEnv SQLFreeConnect
** SQLConnect SQLFreeEnv
**
**
********************************************************/
#include <stdio.h>
#include <stdlib.h>
#include "sqlcli.h"
int
connect(SQLHENV henv,
SQLHDBC * hdbc);
#define MAX_DSN_LENGTH 18
#define MAX_UID_LENGTH 10
#define MAX_PWD_LENGTH 10
#define MAX_CONNECTIONS 5
int
main()
{
SQLHENV henv;
SQLHDBC hdbc[MAX_CONNECTIONS];
/* allocate an environment handle */
SQLAllocEnv(&henv);
/* Connect to first data source */
connect(henv, &hdbc[0];);
/* Connect to second data source */
connect(henv, &hdbc[1];);
/********* Start Processing Step *************************/
/* allocate statement handle, execute statement, etc. */
/********* End Processing Step ***************************/
printf("\nDisconnecting .....\n");
SQLFreeConnect(hdbc[0]); /* free first connection handle */
SQLFreeConnect(hdbc[1]); /* free second connection handle */
SQLFreeEnv(henv); /* free environment handle */
return (SQL_SUCCESS);
}
/********************************************************************
** connect - Prompt for connect options and connect **
********************************************************************/
int
connect(SQLHENV henv,
SQLHDBC * hdbc)
{
SQLRETURN rc;
SQLCHAR server[MAX_DSN_LENGTH + 1], uid[MAX_UID_LENGTH + 1],
pwd[MAX_PWD_LENGTH
+ 1];
SQLCHAR buffer[255];
SQLSMALLINT outlen;
printf("Enter Server Name:\n");
gets((char *) server);
printf("Enter User Name:\n");
gets((char *) uid);
printf("Enter Password Name:\n");
gets((char *) pwd);
SQLAllocConnect(henv, hdbc);/* allocate a connection handle */
rc = SQLConnect(*hdbc, server, SQL_NTS, uid, SQL_NTS, pwd, SQL_NTS);
if (rc != SQL_SUCCESS) {
printf("Error while connecting to database\n");
return (SQL_ERROR);
} else {
printf("Successful Connect\n");
return (SQL_SUCCESS);
}
}
]]>
SQLAllocHandle() 鍒嗛厤浠諱綍綾誨瀷鐨勫彞鏌勩?
璇硶
SQLRETURN SQLAllocHandle (SQLSMALLINT htype,
SQLINTEGER ihandle,
SQLINTEGER *handle);
鍑芥暟鑷彉閲?/strong> 鐢ㄦ硶
姝ゅ嚱鏁扮粍鍚堜簡鍑芥暟 SQLAllocEnv()銆丼QLAllocConnect() 鍜?SQLAllocStmt()銆?
濡傛灉 htype 鏄?SQL_HANDLE_ENV錛屽垯 ihandle 蹇呴』鏄?SQL_NULL_HANDLE銆傚鏋?htype 鏄?SQL_HANDLE_DBC錛屽垯 ihandle 蹇呴』鏄湁鏁堢殑鐜鍙ユ焺銆傚鏋?htype 鏄?SQL_HANDLE_DESC 鎴?SQL_HANDLE_STMT錛屽垯 ihandle 蹇呴』鏄湁鏁堢殑榪炴帴鍙ユ焺銆?
榪斿洖鐮?/strong>
鏁版嵁綾誨瀷
鑷彉閲?
浣跨敤
鎻忚堪
SQLSMALLINT
htype
杈撳叆
瑕佸垎閰嶇殑鍙ユ焺鐨勭被鍨嬨傚繀欏繪槸 SQL_HANDLE_ENV銆丼QL_HANDLE_DBC銆丼QL_HANDLE_DESC 鎴?SQL_HANDLE_STMT銆?
SQLINTEGER
ihandle
杈撳叆
鎻忚堪鍦ㄥ叾涓垎閰嶆柊鍙ユ焺鐨勪笂涓嬫枃鐨勫彞鏌勶紱鐒惰岋紝濡傛灉 htype 鏄?SQL_HANDLE_ENV錛屽垯榪欐槸 SQL_NULL_HANDLE銆?
SQLINTEGER *
handle
杈撳嚭
鎸囧悜鍙ユ焺鐨勬寚閽?
]]>
]]>
銆銆閬典粠鏍囧噯錛欼SO 92
銆銆鍔熻兘璇存槑錛?SQLBindCol灝嗗簲鐢ㄧ▼搴忕殑鏁版嵁緙撳啿緇戝畾鍒扮粨鏋滈泦鐨勫悇鍒?br> 銆銆鍑芥暟鍘熷瀷錛?SQLRETURN SQLBindCol(
銆銆SQLHSTMT StatementHandle,
銆銆SQLUSMALLINT ColumnNumber,
銆銆SQLSMALLINT TargetType,
銆銆SQLPOINTER TargetValuePtr,
銆銆SQLINTEGER BufferLength,
銆銆SQLLEN * StrLen_or_Ind);
銆銆鍙傛暟錛?br> 銆銆StatementHandle
銆銆[杈撳叆] 澹版槑鐨勫彞鏌?br> 銆銆ColumnNumber
銆銆[杈撳叆] 緇撴灉闆嗛噷瑕佺粦瀹氱殑鍒楀彿銆傚垪鍙蜂負浠?寮濮嬮掑鐨勬暟瀛楃紪鍙鳳紝絎?鍒椾負涔︾鍒椼傚鏋滄病鏈変嬌鐢ㄤ功絳鋸曗曞氨鏄錛孲QL_ATTR_USE_BOOKMARKS榪欎釜澹版槑灞炴ц緗負SQL_UB_OFF鈥曗曢偅涔堝垪鍙蜂粠1寮濮嬭鏁幫紱
銆銆TargetType
銆銆[杈撳叆] *TargetValuePtr鎵鎸囩紦鍐茬殑C鏁版嵁綾誨瀷鐨勬爣璇嗙錛屽綋閫氳繃SQLFetch, SQLFetchScroll, SQLBulkOperations鎴?SQLSetPos浠庢暟鎹簮鍙栧緱鏁版嵁鐨勬椂鍊欙紝椹卞姩紼嬪簭灝嗘暟鎹漿鎹㈡垚榪欎釜綾誨瀷錛涘綋閫氳繃SQLBulkOperations鎴朣QLSetPos鍙戦佹暟鎹埌鏁版嵁婧愭椂錛岄┍鍔ㄧ▼搴忎粠榪欎釜綾誨瀷鏉ヨ漿鎹㈡暟鎹?br> 銆銆TargetValuePtr
銆銆[杈撳叆/杈撳嚭] 鐢ㄦ潵緇戝畾鍒楃殑鏁版嵁緙撳啿鐨勬寚閽堛係QLFetch 鍜孲QLFetchScroll榪斿洖鏁版嵁鍒拌繖涓紦鍐層傚綋鎿嶄綔涓篠QL_FETCH_BY_BOOKMARK鏍囪瘑鐨勬椂鍊橲QLBulkOperations榪斿洖鏁版嵁鍒拌繖涓紦鍐層傚綋鎿嶄綔涓篠QL_ADD 鎴?SQL_UPDATE_BY_BOOKMARK鏃訛紝浠庤繖涓紦鍐插彇寰楁暟鎹傚綋鎿嶄綔涓篠QL_REFRESH鏃訛紝SQLSetPos榪斿洖鏁版嵁鍒拌繖涓紦鍐蹭腑錛涘綋鎿嶄綔涓篠QL_UPDATE鏃訛紝浠庤繖涓紦鍐插彇寰楁暟鎹傚鏋淭argetValuePtr涓轟竴絀烘寚閽堬紝椹卞姩紼嬪簭鍙栨秷鍒楀埌鏁版嵁緙撳啿鐨勭粦瀹氥傚簲鐢ㄧ▼搴忓彲閫氳繃SQL_UNBIND閫夐」閫氳繃璋冪敤SQLFreeStmt鏉ュ彇娑堟墍鏈夊垪鐨勭粦瀹氥傚鏋淪QLBindCol璋冪敤鐨凾argetValuePtr鍙傛暟涓虹┖鎸囬拡鑰孲trLen_or_IndPtr鏄湁鏁堢殑鍊肩殑璇濓紝搴旂敤紼嬪簭鍙彇娑堝垪鐨勭粦瀹氫絾浠嶇劧瀛樺湪涓涓鍒楃殑闀垮害/鎸囩ず緙撳啿緇戝畾銆?br> 銆銆BufferLength
銆銆[杈撳叆] *TargetValuePtr鎸囧悜鐨勭紦鍐茬殑瀛楄妭鏁伴暱搴︺傞┍鍔ㄧ▼搴忎嬌鐢˙ufferLength鏉ラ伩鍏嶈繑鍥炲彲鍙橀暱鏁版嵁濡傚瓧絎︽垨浜岃繘鍒舵暟鏃跺啓榪?TargetValuePtr鐨勮竟鐣屻傛敞鎰忛┍鍔ㄧ▼搴忎細鍦ㄨ繑鍥炲瓧絎︽暟鎹埌*TargetValuePtr鏃惰綆楃┖緇堟絎︺傚洜姝?TargetValuePtr緙撳啿灝辮鍖呮嫭絀虹粓姝㈢鐨勭┖闂達紝鍚﹀垯椹卞姩紼嬪簭浼氭埅鐭暟鎹傚綋椹卞姩紼嬪簭榪斿洖瀹氶暱鏁版嵁濡傛暣褰㈡暟鎴栦竴涓暟鎹粨鏋勬椂錛岄┍鍔ㄧ▼搴忎細蹇界暐BufferLength鍙傛暟騫跺垽鏂紦鍐叉槸鍚﹁凍澶熷ぇ鏉ユ帴鏀舵暟鎹傚洜姝ゅ緢閲嶈鐨勬槸搴旂敤紼嬪簭瑕佸垎閰嶄竴涓凍澶熷ぇ鐨勭紦鍐茬粰瀹氶暱鏁版嵁錛屽惁鍒欓┍鍔ㄧ▼搴忎細鍐欒繃緙撳啿鐨勭晫銆傚綋BufferLength 灝忎簬0鏃禨QLBindCol榪斿洖SQLSTATE HY090錛堟棤鏁堢殑瀛楃涓叉垨緙撳啿闀垮害錛夛紝絳変簬0鏃朵笉榪斿洖榪欎釜緇撴灉錛屽彲鏄紝濡傛灉TargetType鎸囧畾涓轟竴涓瓧絎︾被鍨嬶紝搴旂敤紼嬪簭灝變笉瑕佸皢BufferLength璁句負0錛屽洜涓篒SO鐨凜LI-閫傚簲鐨?椹卞姩紼嬪簭鍦ㄨ繖縐嶆儏鍐典笅榪斿洖SQLSTATE HY090銆?br> 銆銆StrLen_or_IndPtr
銆銆[杈撳叆/杈撳嚭] 鎸囧悜緇戝畾鍒楃殑闀垮害/鎸囩ず緙撳啿銆係QLFetch 鍜?SQLFetchScroll榪斿洖涓涓暟鍊煎埌榪欎釜緙撳啿銆傚綋鎿嶄綔涓篠QL_ADD錛孲QL_UPDATE_BY_BOOKMARK, 鎴?SQL_DELETE_BY_BOOKMARK鏃禨QLBulkOperations浠庤繖涓紦鍐插彇寰椾竴涓暟鍊箋傚綋鎿嶄綔涓篠QL_FETCH_BY_BOOKMARK鏃禨QLBulkOperations榪斿洖涓涓暟鍊煎埌榪欎釜緙撳啿錛屽綋鎿嶄綔涓篠QL_REFRESH鏃禨QLSetPos榪斿洖涓涓暟鍊煎埌姝ょ紦鍐詫紱浣嗘搷浣滀負SQL_UPDATE鏃訛紝瀹冧粠榪欎釜緙撳啿鍙栧洖涓涓暟鍊箋係QLFetch, SQLFetchScroll, SQLBulkOperations, 鍜?SQLSetPos鍙繑鍥炰互涓嬫暟鍊煎埌闀垮害/鎸囩ず緙撳啿錛?br> 銆銆l 榪斿洖鏁版嵁鐨勬湁鏁堥暱搴?br> 銆銆l SQL_NO_TOTAL
銆銆l SQL_NULL_DATA
銆銆搴旂敤紼嬪簭鍙笅鍒楀兼斁鍏ラ暱搴?鎸囩ず緙撳啿緇欎緵SQLBulkOperations 鎴朣QLSetPos浣跨敤錛?br> 銆銆l 寰呭彂閫佹暟鎹殑闀垮害
銆銆l SQL_NTS
銆銆l SQL_NULL_DATA
銆銆l SQL_DATA_AT_EXEC
銆銆l SQL_LEN_DATA_AT_EXEC瀹忕殑緇撴灉
銆銆l SQL_COLUMN_IGNORE
銆銆濡傛灉鎸囩ず緙撳啿鍜岄暱搴︾紦鍐叉槸鍒嗗紑鐨勭紦鍐插尯鐨勮瘽錛屾寚紺虹紦鍐插彧鑳借繑鍥濻QL_NULL_DATA錛岃岄暱搴︾紦鍐插彲榪斿洖鎵鏈夊叾浠栫殑鍊箋傚鏋淪trLen_or_IndPtr涓轟竴涓┖鎸囬拡錛岄偅涔堟病鏈夊彲鐢ㄧ殑闀垮害鎴栨寚紺哄箋傝繖鏄綋鍙栨暟鎹笖鏁版嵁涓篘ULL鏃剁殑涓涓敊璇?br> 銆銆榪斿洖鍊鹼細
銆銆SQL_SUCCESS,SQL_SUCCESS_WITH_INFO,SQL_ERROR,鎴朣QL_INVALID_HANDLE.
銆銆澶囨敞錛氭SDK鍑芥暟鐨勪嬌鐢ㄦ秹鍙婂埌寰堝鐩稿叧鐨勯儴鍒嗭紝璇蜂嬌鐢ㄨ呬竴瀹氳璁ょ湡浠旂粏銆?br> 銆銆紺轟緥浠ｇ爜錛?br> 銆銆#define NAME_LEN 50
銆銆#define PHONE_LEN 10
銆銆SQLCHAR szName[NAME_LEN], szPhone[PHONE_LEN];
銆銆SQLINTEGER sCustID, cbName, cbCustID, cbPhone;
銆銆SQLHSTMT hstmt;
銆銆SQLRETURN retcode;
銆銆retcode = SQLExecDirect(hstmt,
銆銆"SELECT CUSTID, NAME, PHONE FROM CUSTOMERS ORDER BY 2, 1, 3",
銆銆SQL_NTS);
銆銆if (retcode == SQL_SUCCESS || retcode == SQL_SUCCESS_WITH_INFO)
銆銆{
銆銆/* Bind columns 1, 2, and 3 */
銆銆SQLBindCol(hstmt, 1, SQL_C_ULONG, &sCustID, 0, &cbCustID);
銆銆SQLBindCol(hstmt, 2, SQL_C_CHAR, szName, NAME_LEN, &cbName);
銆銆SQLBindCol(hstmt, 3, SQL_C_CHAR, szPhone, PHONE_LEN, &cbPhone);
銆銆/* Fetch and print each row of data. On */
銆銆/* an error, display a message and exit. */
銆銆while (TRUE)
銆銆{
銆銆retcode = SQLFetch(hstmt);
銆銆if (retcode == SQL_ERROR || retcode == SQL_SUCCESS_WITH_INFO)
銆銆{
銆銆show_error();
銆銆}
銆銆if (retcode == SQL_SUCCESS || retcode == SQL_SUCCESS_WITH_INFO)
銆銆{
銆銆fprintf(out, "%-*s %-5d %*s", NAME_LEN-1, szName,
銆銆sCustID, PHONE_LEN-1, szPhone);
銆銆}
銆銆else
銆銆{
銆銆break;
銆銆}
銆銆}
銆銆}
]]>