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JAVA调用oracle函数返回游标处理

崖客 — Sat, 17 May 2008 16:37:00 GMT

oracle函数如下：

Create or REPLACE FUNCTION AAAAA (
    P_USER_ID_I         IN  VARCHAR2             --接收输入参数
)
RETURN   SYS_REFCURSOR
AS
    P_RESULT_SET_O         SYS_REFCURSOR; --返回游标
    X_SQL VARCHAR2(200);
BEGIN
     X_SQL :='select user_id,user_name,email from user_mst
   where
    user_id like ''%' || P_USER_ID_I ||'%''';  --生成SQL语句
     OPEN P_RESULT_SET_O FOR X_SQL;
     RETURN P_RESULT_SET_O;   --返回游标
END AAAAA;

java中调用，并处理：

CallableStatement cstmt = null;
ResultSet rs = null;
try {
String callSql = "{? = call AAAAA(?)}";
cstmt = conn.prepareCall(callSql);

cstmt.setString(2, "userName");

cstmt.registerOutParameter(1, oracle.jdbc.OracleTypes.CURSOR);

cstmt.execute();

rs = (ResultSet) cstmt.getObject(1);
if (rs != null) {
       System.out.print("usercd");
       System.out.print("userName");
       System.out.println("EMAIL");
       while (rs.next()) {
    System.out.print(rs.getString(1)+"   ");
    System.out.print(rs.getString(2)+"   ");
    System.out.println(rs.getString(3));
       }
}

崖客 2008-05-18 00:37 发表评论

alter table 用法大全

崖客 — Sat, 17 May 2008 01:11:00 GMT

----------------MODIFY--------------------------------------------------

某列定义非空约束
SQL>ALTER TABLE office_organization

>MODIFY(desc VARCHAR2(20)

>CONSTRAINT nn_desc NOT NULL)

某列定义唯一关键字
SQL>ALTER TABLE office_organization

>MODIFY(office_name VATCHAR2(20)

>CONSTRAINT uq_officename UNIQUE)
----------------ADD--------------------------------------------------

ALTER TABLE jxzy.switch

>ADD (DESC VARCHAR2(30));

----------------DISABLE---------------------------------------------

使主键约束无效
SQL>ALTER TABLE switch DISABLE PRIMARY KEY

崖客 2008-05-17 09:11 发表评论

在java中调用数据库中的函数【收集】

崖客 — Fri, 02 May 2008 06:45:00 GMT

内容或简介：

/**

调用数据库里的一个函数

一个函数本质上一个返回一个结果的存储过程，这个例子示范了怎么调用有in、out和in/out参数的函数

***********************************/

CallableStatement cs;

try {

// 调用一个没有参数的函数; 函数返回 a VARCHAR

// 预处理callable语句

cs = connection.prepareCall("{? = call myfunc}");

// 注册返回值类型

cs.registerOutParameter(1, i);

// Execute and retrieve the returned value

cs.execute();

String retValue = cs.getString(1);

// 调用有一个in参数的函数; the function returns a VARCHAR

cs = connection.prepareCall("{? = call myfuncin(?)}");

// Register the type of the return value

cs.registerOutParameter(1, Types.VARCHAR);

// Set the value for the IN parameter

cs.setString(2, "a string");

// Execute and retrieve the returned value

cs.execute();

retValue = cs.getString(1);

// 调用有一个out参数的函数; the function returns a VARCHAR

cs = connection.prepareCall("{? = call myfuncout(?)}");

// Register the types of the return value and OUT parameter

cs.registerOutParameter(1, Types.VARCHAR);

cs.registerOutParameter(2, Types.VARCHAR);

// Execute and retrieve the returned values

cs.execute();

retValue = cs.getString(1); // return value

String outParam = cs.getString(2); // OUT parameter

// 调用有一个in/out参数的函数; the function returns a VARCHAR

cs = connection.prepareCall("{? = call myfuncinout(?)}");

// Register the types of the return value and OUT parameter

cs.registerOutParameter(1, Types.VARCHAR);

cs.registerOutParameter(2, Types.VARCHAR);

// Set the value for the IN/OUT parameter

cs.setString(2, "a string");

// Execute and retrieve the returned values

cs.execute();

retValue = cs.getString(1); // return value

outParam = cs.getString(2); // IN/OUT parameter

} catch (SQLException e) {

}

崖客 2008-05-02 14:45 发表评论