达梦DCI

/************************************************************************/
/* DCI编程实例 */
/************************************************************************/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <malloc.h>
#include "DCI.h"

/*  声明句柄 */
OCIEnv  *envhp;  /*  环境句柄 */
OCISvcCtx  *svchp;  /*  服务环境句柄 */
OCIServer *srvhp;  /*  服务器句柄  */
OCISession  *authp;  /*  会话句柄 */
OCIStmt *stmthp;  /*  语句句柄 */
OCIDescribe  *dschp;  /*  描述句柄 */
OCIError *errhp;  /*  错误句柄 */
OCIDefine *defhp[3]; /*  定义句柄 */
OCIBind *bidhp [4]; /*  绑定句柄 */
sb2 ind[3];  /*  指示符变量  */
/*  绑定select结果集的参数  */
text szpersonid[11]; /*  存储personid列 */
text szsex[2];  /*  存储sex列 */
text szname[51];  /*  存储name列  */
text szemail[51];  /*  存储mail列  */
text szphone[26];  /*  存储phone列  */
char sql[256];  /*  存储执行的sql语句*/

int main(int argc, char *argv[])
{
    char strServerName[50];
    char strUserName[50];
    char strPassword[50];
    /*  设置服务器，用户名和密码  */
    strcpy(strServerName,"localhost:5236");
    strcpy(strUserName,"SYSDBA");

    strcpy(strPassword,"SYSDBA");
    /* 初始化OCI应用环境*/
    OCIInitialize(OCI_DEFAULT, NULL, NULL, NULL, NULL);
    /* 初始化环境句柄  */
    OCIEnvInit(&envhp, OCI_DEFAULT,0, 0);
    /*  分配句柄 */
    OCIHandleAlloc(envhp, (dvoid**)&svchp, OCI_HTYPE_SVCCTX, 0, 0); /*  服务器环境句  柄  */ 
    OCIHandleAlloc(envhp, (dvoid**)&srvhp, OCI_HTYPE_SERVER, 0, 0); /*  服务器句柄   */
    OCIHandleAlloc(envhp, (dvoid**)&authp, OCI_HTYPE_SESSION, 0, 0); /*  会话句柄 */
    OCIHandleAlloc(envhp, (dvoid**)&errhp, OCI_HTYPE_ERROR, 0, 0); /*  错误句柄 */
    OCIHandleAlloc(envhp, (dvoid**)&dschp, OCI_HTYPE_DESCRIBE,0,0);  /*  描述符句   柄  */
    /*  连接服务器  */
    OCIServerAttach(srvhp, errhp,(text *)strServerName, (sb4)strlen(strServerName),OCI_DEFAULT);
    /*  设置用户名和密码  */
    OCIAttrSet(authp,OCI_HTYPE_SESSION,(text *)strUserName, (ub4)strlen(strUserName),OCI_ATTR_USERNAME,errhp);
    OCIAttrSet(authp,OCI_HTYPE_SESSION,(text *)strPassword, (ub4)strlen(strPassword), OCI_ATTR_PASSWORD,errhp);
    /*  设置服务器环境句柄属性 */
    OCIAttrSet ((dvoid*)svchp, (ub4) OCI_HTYPE_SVCCTX,  (dvoid*)srvhp, (ub4) 0, OCI_ATTR_SERVER, errhp);
    OCIAttrSet(svchp, OCI_HTYPE_SVCCTX,(dvoid*)authp,   0, OCI_ATTR_SESSION, errhp);
    /*  创建并开始一个用户会话 */
    OCISessionBegin (svchp, errhp, authp,OCI_CRED_RDBMS,OCI_DEFAULT);
    OCIHandleAlloc(envhp, (dvoid**)&stmthp,OCI_HTYPE_STMT, 0, 0);  /*  语句句柄 */

    /************************************************************************/
    /* 查询person表 */
    //查询表空间：select * from SYSOBJECTS;
    /************************************************************************/
    strcpy(sql, "select personid, name, phone from person.person;");
    /*  准备SQL语句  */
    OCIStmtPrepare(stmthp, errhp,(text *)sql, strlen(sql),OCI_NTV_SYNTAX, OCI_DEFAULT);
    /*  绑定输出列  */
    OCIDefineByPos (stmthp,&defhp[0],errhp, 1,(ub1*)szpersonid, sizeof(szpersonid),SQLT_STR,&ind[0], 0, 0, OCI_DEFAULT);
    OCIDefineByPos (stmthp,&defhp[1],errhp, 2,(ub1*)szname, sizeof(szname),SQLT_STR,&ind[1], 0, 0, OCI_DEFAULT);
    OCIDefineByPos (stmthp,&defhp[2],errhp, 3,(ub1*)szphone, sizeof(szphone),SQLT_STR,&ind[2], 0, 0, OCI_DEFAULT);
    /*  执行SQL语句  */
    OCIStmtExecute(svchp, stmthp,errhp, (ub4)0, 0, NULL, NULL, OCI_DEFAULT);
    printf("%-10s%-10s%-10s
", "PERSONID", "NAME", "PHONE");
    while((OCIStmtFetch(stmthp, errhp,1,OCI_FETCH_NEXT,OCI_DEFAULT))!=OCI_NO_DATA)
    { 
        printf("%-10s", szpersonid);
        printf("%-10s", szname);
        printf("%-10s
", szphone);
    }

    /************************************************************************/
    /* 向person表插入一条数据 */
    //create table images(name IMAGE);
    //insert into images values ('/home/01.jpg');
    /************************************************************************/
    memset(sql, 0, sizeof(sql));
    strcpy(sql, "insert into person.person(sex, name, email, phone) values(:sex,:name,:email,:phone);");
    /*  准备SQL语句  */
    OCIStmtPrepare(stmthp, errhp,(text *)sql, strlen(sql),OCI_NTV_SYNTAX, OCI_DEFAULT);
    /*  绑定输入列  */
    OCIBindByName (stmthp, &bidhp[0], errhp, ":sex", 4, szsex, sizeof(szsex), SQLT_AFC, NULL, NULL, NULL, 0, NULL, 0);
    OCIBindByName (stmthp, &bidhp[1], errhp, ":name", 5, szname, sizeof(szname), SQLT_AFC, NULL, NULL, NULL, 0, NULL, 0);
    OCIBindByName (stmthp, &bidhp[2], errhp, ":email", 6, szemail, sizeof(szemail), SQLT_AFC, NULL, NULL, NULL, 0, NULL, 0);
    OCIBindByName (stmthp, &bidhp[3], errhp, ":phone", 6, szphone, sizeof(szphone), SQLT_AFC, NULL, NULL, NULL, 0, NULL, 0);
    /*  设置输入参数 */
    memset(szsex, 0, sizeof(szsex));
    strcpy(szsex, "M");
    memset(szname, 0, sizeof(szname));
    strcpy(szname, "张三");
    memset(szemail, 0, sizeof(szemail));
    strcpy(szemail, "zhangsan@dameng.com");
    memset(szphone, 0, sizeof(szphone));
    strcpy(szphone, "027-87588000");
    /*  执行SQL语句  */
    OCIStmtExecute(svchp, stmthp, errhp, (ub4)0, (ub4) 0, (CONST OCISnapshot*) 0, (OCISnapshot*) 0, (ub4) OCI_DEFAULT);
    /*  提交到数据库 */
    OCITransCommit(svchp, errhp, OCI_DEFAULT);

    /************************************************************************/
    /* 更新person表 */
    /************************************************************************/
    memset(sql, 0, sizeof(sql));
    strcpy(sql, "update person.person set   sex='M',name='Liuhuan',email='liujian@mail',phone='13636396811' WHERE personid=1");
    /*  准备SQL语句  */
    OCIStmtPrepare(stmthp, errhp,(text *)sql, strlen(sql),OCI_NTV_SYNTAX, OCI_DEFAULT);
    /*  执行SQL语句  */
    OCIStmtExecute(svchp, stmthp, errhp, (ub4)0, (ub4) 0, (CONST OCISnapshot*) 0, (OCISnapshot*) 0, (ub4) OCI_DEFAULT);
    /*  提交到数据库 */
    OCITransCommit(svchp, errhp, OCI_DEFAULT);

    /************************************************************************/
    /* 删除person表的ID为的数据,首先要在数据库中存在这条记录 */
    /************************************************************************/
    memset(sql, 0, sizeof(sql));
    strcpy(sql, "delete from person.person WHERE personid=?");
    /*  准备SQL语句  */
    OCIStmtPrepare(stmthp, errhp,(text *)sql, strlen(sql),OCI_NTV_SYNTAX, OCI_DEFAULT);
    /*  绑定输入参数 */
    memset(szpersonid, 0, sizeof(szpersonid));
    strcpy(szpersonid, "20");
    OCIBindByPos(stmthp, &bidhp[0], errhp, 1, szpersonid, sizeof(szpersonid),   SQLT_AFC, NULL, NULL, NULL, 0, NULL, 0);
    /*  执行SQL语句  */
    OCIStmtExecute(svchp, stmthp, errhp, (ub4)0, (ub4) 0, (CONST OCISnapshot*) 0, (OCISnapshot*) 0, (ub4) OCI_DEFAULT);
    /*  提交到数据库 */
    OCITransCommit(svchp, errhp, OCI_DEFAULT);
    //结束会话
    OCISessionEnd(svchp, errhp, authp, (ub4) 0);
    //断开与数据库的连接
    OCIServerDetach(srvhp, errhp, OCI_DEFAULT);
    //释放OCI句柄
    OCIHandleFree((dvoid*)dschp, OCI_HTYPE_DESCRIBE);
    OCIHandleFree((dvoid*)stmthp, OCI_HTYPE_STMT );
    OCIHandleFree((dvoid*)errhp, OCI_HTYPE_ERROR);
    OCIHandleFree((dvoid*)authp, OCI_HTYPE_SESSION );
    OCIHandleFree((dvoid*)svchp, OCI_HTYPE_SVCCTX);
    OCIHandleFree((dvoid*)srvhp, OCI_HTYPE_SERVER);

    //错误处理
    int errcode = 0;
    char errbuf[512] = {0};
    OCIErrorGet(errhp, 1, (OraText*)NULL, &errcode, (ub1*)errbuf, sizeof(errbuf), OCI_HTYPE_ERROR);

    return 0;
}

# gcc dmdci.c -ldmoci -L.