Linux环境下oci代码实例

/*************************
编译语句
gcc -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -I${ORACLE_HOME}/rdbms/public -I${ORACLE_HOME}/rdbms/demo -L${ORACLE_HOME}/lib -lclntsh  test1.c




OCI重定义数据类型：




typedef unsigned char ub1;
typedef signed char sb1;
typedef unsigned short ub2;
typedef signed short sb2;
typedef unsigned int ub4;
typedef signed int sb4;
typedef ub4 duword;
typedef sb4 dsword;
typedef dsword dword;




*************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <oci.h>




/*user name and password*/
static text* username=(text *)"scott";
static text* password=(text *)"tiger";
static text* oracle=(text *)"orcl";




/* Define SQL statements to be used in program. */ 
static text* SQL=(text *)"insert into tab1(id, name) values (:1, :2)";




/*handle define*/
static OCIEnv *p_env;//OCI environment handle
static OCIError *p_err;//OCI error handle
static OCISvcCtx *p_svc;//OCI service context handel
static OCIServer *p_ser;//OCI server handle
static OCISession *p_usr;//OCI user session handle
static OCIStmt *p_sql;//OCI statement handle
static OCIDefine *p_dfn = (OCIDefine *)NULL;//OCI define handle
static OCIBind *p_bnd = (OCIBind *)NULL;//OCI bind handle








/*create OCI environment*/
int create_env()
{
int swResult; //Return value
if(swResult = OCIEnvCreate(&p_env,OCI_DEFAULT,NULL,NULL,NULL,NULL,0,NULL))
{
printf("environment create error!\n\n");
return -1;
}
else 
{
printf("environment create success!\n\n");
return 0;
}
}




/*init handle*/
int init_handle()
{
int swResult;
if(swResult = OCIHandleAlloc(p_env,(dvoid *)&p_ser,OCI_HTYPE_SERVER,0,NULL))//服务器句柄
{
printf("init server handle error!\n\n");
return -1;
}
else
{
printf("init server handle success!\n\n");
}




if(swResult = OCIHandleAlloc(p_env,(dvoid *)&p_err,OCI_HTYPE_ERROR,0,NULL))//错误句柄
{
printf("init error handle error!\n\n");
return -1;
}
else
{
printf("init error handle success!\n\n");
}
if(swResult = OCIHandleAlloc(p_env,(dvoid *)&p_usr,OCI_HTYPE_SESSION,0,NULL))//事务句柄
{
printf("init session handle error!\n\n");
return -1;
}
else
{
printf("init session handle success!\n\n");
}
if(swResult = OCIHandleAlloc(p_env,(dvoid *)&p_svc,OCI_HTYPE_SVCCTX,0,NULL))//上下文句柄
{
printf("init service context handle error!\n\n");
return -1;
}
else
{
printf("init service context handel success!\n\n");
}
if(swResult = OCIHandleAlloc(p_env,(dvoid *)&p_sql,OCI_HTYPE_STMT,0,NULL))//SQL语句句柄
{
printf("init statement handle error!\n\n");
return -1;
}
else
{
printf("init statement handle success!\n\n");
}
return 0;
}




/*connect server*/
int conn_server()
{
int swResult;
if(swResult = OCILogon(p_env,p_err,&p_svc,(text *)username,strlen(username),(text *)password,strlen(password),(text *)oracle,strlen(oracle)))
{
printf("connect error!\n\n");
return -1;
}
else 
printf("connect success!\n\n");
return 0;
}




/*SQL statements*/
int oci_exec()
{
int swResult;
//准备SQL语句
if(swResult = OCIStmtPrepare(p_sql,p_err,SQL,strlen(SQL),OCI_NTV_SYNTAX,OCI_DEFAULT))
{
printf("prepare SQL statements error!\n\n");
}
else
{
printf("prepare SQL statements success!\n\n");
}




//设置绑定变量
int getId ;
char getName[10];

OCIBind *p_bndp1 = NULL;
OCIBind *p_bndp2 = NULL;

printf("输入ID,NAME:\n");
scanf("%d %s",&getId,getName);




if(swResult = OCIBindByPos(p_sql,&p_bndp1,p_err,1,(dvoid *)&getId,(sb4)sizeof(getId),SQLT_INT,NULL,NULL,NULL,0,NULL,OCI_DEFAULT))
{
printf("Bind p1 error!\n\n");
return -1;
}
else 
{
printf("bind success!\n\n");
}

if(swResult = OCIBindByPos(p_sql,&p_bndp2,p_err,2,&getName,(sb4)sizeof(getName),SQLT_STR, (dvoid *) 0, (ub2 *) 0, (ub2 *) 0, (ub4) 0, (ub4 *) 0, OCI_DEFAULT))
{
printf("Bind p2 error!\n\n");
return -1;
}
else 
{
printf("bind success!\n\n");
}


//执行SQL statements
if(swResult = OCIStmtExecute(p_svc,p_sql,p_err,1,0,NULL,NULL,OCI_DEFAULT))
{
printf("execute SQL statement error!\n\n");
return -1;
}
else
{
printf("execute SQL statement success!\n\n");
}
return 0;
}








/*quit server*/
void quit_server()
{
OCILogoff(p_svc,p_err);
printf("Quit success!\n");
}




/*free handle*/
void free_handle()
{
OCIHandleFree(p_ser,OCI_HTYPE_SERVER);//释放服务器句柄
OCIHandleFree(p_err,OCI_HTYPE_ERROR);//释放错误句柄
OCIHandleFree(p_usr,OCI_HTYPE_SESSION);//释放事务句柄
OCIHandleFree(p_svc,OCI_HTYPE_SVCCTX);//释放上下文句柄
OCIHandleFree(p_sql,OCI_HTYPE_STMT);//释放SQL语句句柄
}




int main()
{
if(create_env() == -1)//创建环境
return -1;
if(init_handle() == -1)//初始化句柄
return -1;
if(conn_server() == -1)//连接数据库
return -1;
if(oci_exec() == -1)
return -1;
quit_server();//退出数据库
free_handle();//释放句柄
return 0;
}