[轉]Oracle 調用存儲過程並顯示結果集 Oracle.DataAccess.Client OracleDbType.RefCursor

本文轉自：http://liye9801.blog.163.com/blog/static/6019703200901244448950/

今天學習了一個Oracle中的存儲過程,一開始便被如果返回結果集難住了.經Google后,找到很多資料,發現一種最簡便的方式(見下面的存儲過程部分):

存儲過程建好后,怎么調試它又成了問題,它不能像MS-SqlServer一樣exec,但是可以通過下面的SQL語句調用(見調用存儲過程SQL版),主要知識點是

參考游標的使用.

后面附上.NET調用存儲過程返回結果集的方法.

JAVA調用的方法還沒有進行測試,不過應該沒什么問題.

 

 

--存儲過程返回結果集

create or replace procedure getResult(p_cur out sys_refcursor) 
as 
begin 
open p_cur for 
select * from T_MyAccount; --你的sql 語句 

end getResult;

 

--SQL調用存儲過程

DECLARE TYPE mytable IS TABLE OF t_myAccount%ROWTYPE; 
l_data mytable; 
l_refc sys_refcursor; 
BEGIN 

--調用存儲過程

getresult(l_refc); 

FETCH l_refc BULK COLLECT INTO l_data;


CLOSE l_refc;

FOR i IN 1 .. l_data.COUNT 
LOOP 
     DBMS_OUTPUT.put_line (l_data (i).fAccount || l_data (i).fPassword); 
END LOOP; 
END;

 

--.NET調用存儲過程

''' <summary> 
''' .NET 調用存儲過程並返回結果集  VB.NET版

''' 要注意的一個重點是orc.Parameters.Add("Rec", OracleDbType.RefCursor, ParameterDirection.Output) 
''' </summary> 
''' <remarks></remarks> 
Private Sub ExecOracleProc() 
    Dim constr As String = "Data Source=192.168.0.209:1521/XE;Persist Security Info=True;User ID=LSH;password=" 
    Dim con As New Oracle.DataAccess.Client.OracleConnection(constr) 
    Dim orc As New OracleCommand() 
    Dim oda As New OracleDataAdapter(orc) 
    con.Open() 
    orc.Connection = con 
    orc.CommandText = "getResult" 
    orc.Parameters.Add("Rec", OracleDbType.RefCursor, ParameterDirection.Output) 
    orc.CommandType = CommandType.StoredProcedure 
    'd.ExecuteNonQuery() 
    Dim ds As New DataSet 
    oda.Fill(ds) 
    Me.DataGridView2.DataSource = ds.Tables(0) 
    con.Close() 

End Sub

 

Java中調用存儲過程：

import java.sql.*; 
import oracle.jdbc.*;

public class TestResultSet { 
public TestResultSet() { 
try { 
DriverManager.registerDriver (new oracle.jdbc.OracleDriver()); 
Connection conn = DriverManager.getConnection(”jdbc:oracle:oci:@w2k1″, “scott”, “tiger”); 
CallableStatement stmt = conn.prepareCall(”BEGIN GetEmpRS(?, ?); END;”); 
stmt.setInt(1, 30); // DEPTNO 
stmt.registerOutParameter(2, OracleTypes.CURSOR); //REF CURSOR 
stmt.execute(); 
ResultSet rs = ((OracleCallableStatement)stmt).getCursor(2); 
while (rs.next()) { 
System.out.println(rs.getString(”ename”) + “:” + rs.getString(”empno”) + “:” + rs.getString(”deptno”)); 
} 
rs.close(); 
rs = null; 
stmt.close(); 
stmt = null; 
conn.close(); 
conn = null; 
} 
catch (SQLException e) { 
System.out.println(e.getLocalizedMessage()); 
} 
}

public static void main (String[] args) { 
new TestResultSet(); 
} 
}