JAVA执行带SYS_REFCURSOR游标的oracle存储过程返回结果集 会话级临时表

sys_refcursor是oracle9i以后系统定义的一个refcursor,主要作用是用于存储过程返回结果集。

存储过程结构如下:

CREATE OR REPLACE PROCEDURE SP_CalcChargePrice
/*    
  计算报备、评估收费基准价    
  @Charge=收费项目    
  @Amount=收费依据金额    
  @Kind=类别  1=报备  2=评估    
  @Year=暂定 
*/   
 (
  v_Charge IN VARCHAR2 DEFAULT NULL ,
  v_AmountTemp IN NUMBER DEFAULT NULL ,
  v_Kind IN NUMBER DEFAULT 1 ,
  v_Year IN NUMBER DEFAULT 0 ,
  v_Hours IN NUMBER DEFAULT 0, 
  v_Result  OUT SYS_REFCURSOR
)
AS
BEGIN
--…………存储过程代码太长省略(400+行)…………
END;

存储过程带了6个参数,其中一个是OUT  SYS_REFCURSOR类型用以返回结果集,

JAVA中调用该存储过程执行并返回结果集为ResultSet方法:

	
		try {
	          DriverManager.registerDriver (new oracle.jdbc.OracleDriver());
	          Connection conn = DriverManager.getConnection("jdbc:oracle:thin:@127.0.0.1:1521:XE", "dbo_MTOA_XJICPA", "dbo_MTOA_XJICPA");
	          CallableStatement stmt = conn.prepareCall("{ call SP_CALCCHARGEPRICE(?,?,?,?,?,?) }");
	          stmt.setNString(1,"评估计件");
	          stmt.setDouble(2,16544.90);
	          stmt.setInt(3,2);
	          stmt.setInt(4,0);
	          stmt.setInt(5,0);
	          stmt.registerOutParameter(6, OracleTypes.CURSOR); 
	          stmt.execute();
	          ResultSet rs = (ResultSet) stmt.getObject(6);
	          while (rs.next()) {
	            System.out.println(rs.getString("PRICE"));
	          }
	          rs.close();
	          rs = null;
	          stmt.close();
	          stmt = null;
	          conn.close();
	          conn = null;
	        }
	        catch (SQLException e) {
	          System.out.println(e.getLocalizedMessage());
	        }	

oracle中调用方法(测试返回了4个字段值):

--调用方法
Declare
  v_rent_rows SYS_REFCURSOR;
  v_rent_row tt_ChargePrice_Result%rowType;
begin
  SP_CalcChargePrice( '评估计件', 16544.90, 2, 0, 0,v_rent_rows);
  Dbms_output.put_line('PRICE | RUNDATE | RESULT | UPAMOUNT');
  loop
    fetch v_rent_rows into v_rent_row;
    exit when v_rent_rows%NOTFOUND;
    Dbms_output.put_line(v_rent_row.PRICE||', '||v_rent_row.RUNDATE||', '||v_rent_row.RESULT||', '||v_rent_row.UPAMOUNT);
  end loop;
  close v_rent_rows;
end;

使用的临时表(会话级)建表语句:

CREATE Global Temporary Table TT_CHARGEPRICE_RESULT (
  "KEYID" VARCHAR2(40 CHAR) NOT NULL ,
  "CHARGEID" VARCHAR2(20 CHAR) NOT NULL ,
  "IKIND" NUMBER(3) NOT NULL ,
  "RUNDATE" VARCHAR2(200 CHAR) NOT NULL ,
  "ILEVEL" NUMBER(10) NOT NULL ,
  "BUSINESSNAME" VARCHAR2(50 CHAR) NOT NULL ,
  "CHARGEPATTEM" NUMBER(18,6) ,
  "UPAMOUNT" NUMBER(14,4) NOT NULL ,
  "DOWNAMOUNT" NUMBER(14,4) NOT NULL ,
  "ISYEAR" NUMBER(1) NOT NULL ,
  "BASEPRICE" NUMBER(10,4) NOT NULL ,
  "CALCWAY" VARCHAR2(1000 CHAR) NOT NULL ,
  "WAYTYPE" NUMBER(10) NOT NULL ,
  "PAYCOUNT" NUMBER(8,6) NOT NULL ,
  "DISCOUNT" NUMBER(8,6) NOT NULL ,
  "ISLOOP" NUMBER(1) NOT NULL ,
  "RESULT" NUMBER(18,6) NOT NULL ,
  "PRICE" NUMBER(18,6) NOT NULL 
)   on commit preserve rows 

Oracle中会话级临时表为会话隔离,当前session存储过程查询生成的结果只有当前会话可见,会话结束清空,该会话没结束,其它新增会话查询此表也是空的。真正的会话隔离,而事务级临时表则是一提交事务则清空。

posted @ 2022-10-04 00:15  IT情深  阅读(617)  评论(0编辑  收藏  举报