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1. 从www.postgresql.org下载最新的postgresql-snapshot.tar.gz, ant from apache;
2. setting ANT_HOME
3. ../configure --with-java; make; make install
FUNCTION 和 JAVA 代码参考了jdbc.postgresql.org mailing list里面的内容.
CREATE TABLE users (id int, name varchar(32));
CREATE OR REPLACE FUNCTION sp_users_select () RETURNS refcursor
AS '
declare ref refcursor;
begin
open ref for select * from users;
return ref;
end;
' LANGUAGE plpgsql;
import java.lang.*;
import java.sql.*;
public class pc
{
public static void main(String[] args)
throws Exception
{
String driver = "org.postgresql.Driver";
String url = "jdbc:postgresql://localhost:5432/nop";
String user = "nop";
String passwd = "nop";
Class.forName(driver);
Connection conn = DriverManager.getConnection(url, user, passwd);
conn.setAutoCommit(false); // return refcursor must within a transaction
CallableStatement proc = conn.prepareCall("{ ? = call sp_users_select () }");
proc.registerOutParameter(1, Types.OTHER);
proc.execute();
ResultSet result = (ResultSet) proc.getObject(1);
System.out.println(result);
while(result.next())
{
System.err.println("Name : " + result.getString(2));
}
conn.commit();
}
}
| 夜猫子 回复于：2003-07-17 01:02:05
| java我是一窍不通的，不好意思。
| | joint 回复于：2003-07-17 09:44:32
| 我这么命苦啊？ 
| | 夜猫子 回复于：2003-07-17 10:37:12
| 你命好，大家嚼烂了的东西，有什么意思，大家都不懂，你搞定了才有意思。
| | joint 回复于：2003-07-19 12:44:20
| 猫子,我解决了,哈哈,HAPPY,最新的驱动解决了CallableStatement,先做了个return refcursor测试,其他的可以从JDBC代码的test里面参考,稍后做UPDATE, DELETE,INSERT测试
| | joint 回复于：2003-07-19 14:01:24
| 就写这么多了,JAVA程序最后还有个invalid message length的问题,没找到是在哪里,想到了再说吧
--
-- PostgreSQL database dump
--
\connect - postgres
SET search_path = public, pg_catalog;
--
-- TOC entry 7 (OID 17142)
-- Name: plpgsql_call_handler (); Type: FUNC PROCEDURAL LANGUAGE; Schema: public; Owner: postgres
--
CREATE FUNCTION plpgsql_call_handler () RETURNS language_handler
AS '$libdir/plpgsql', 'plpgsql_call_handler'
LANGUAGE c;
--
-- TOC entry 6 (OID 17143)
-- Name: plpgsql; Type: PROCEDURAL LANGUAGE; Schema: public; Owner:
--
CREATE TRUSTED PROCEDURAL LANGUAGE plpgsql HANDLER plpgsql_call_handler;
--
-- TOC entry 2 (OID 2200)
-- Name: public; Type: ACL; Schema: -; Owner: postgres
--
REVOKE ALL ON SCHEMA public FROM PUBLIC;
GRANT ALL ON SCHEMA public TO PUBLIC;
--
-- TOC entry 3 (OID 17140)
-- Name: users; Type: TABLE; Schema: public; Owner: postgres
--
CREATE TABLE users (
id integer NOT NULL,
name character varying(32)
);
--
-- TOC entry 4 (OID 17140)
-- Name: users; Type: ACL; Schema: public; Owner: postgres
--
REVOKE ALL ON TABLE users FROM PUBLIC;
GRANT INSERT,SELECT,UPDATE,DELETE ON TABLE users TO nop;
--
-- TOC entry 8 (OID 17144)
-- Name: sp_users_select (); Type: FUNCTION; Schema: public; Owner: postgres
--
CREATE FUNCTION sp_users_select () RETURNS refcursor
AS '
declare ref refcursor;
begin
open ref for select * from users;
return ref;
end;
'
LANGUAGE plpgsql;
--
-- TOC entry 9 (OID 17149)
-- Name: sp_users_insert (integer, character varying); Type: FUNCTION; Schema: public; Owner: postgres
--
CREATE FUNCTION sp_users_insert (integer, character varying) RETURNS integer
AS '
declare v_id alias for $1;
v_name alias for $2;
v_return int;
begin
insert into users values (v_id, v_name);
get diagnostics v_return = ROW_COUNT;
return v_return;
end;'
LANGUAGE plpgsql;
--
-- TOC entry 10 (OID 17156)
-- Name: sp_users_delete (integer); Type: FUNCTION; Schema: public; Owner: postgres
--
CREATE FUNCTION sp_users_delete (integer) RETURNS integer
AS '
declare v_id alias for $1;
v_return int;
begin
delete from users where id = v_id;
get diagnostics v_return = ROW_COUNT;
return v_return;
end;'
LANGUAGE plpgsql;
--
-- TOC entry 5 (OID 17147)
-- Name: users_pkey; Type: CONSTRAINT; Schema: public; Owner: postgres
--
ALTER TABLE ONLY users
ADD CONSTRAINT users_pkey PRIMARY KEY (id);
////////////////////////////////////
import java.lang.*;
import java.sql.*;
public class pc
{
public static void main(String[] args)
throws Exception
{
String driver = "org.postgresql.Driver";
String url = "jdbc:postgresql://localhost:5432/nop";
String user = "nop";
String passwd = "nop";
Class.forName(driver);
Connection conn = DriverManager.getConnection(url, user, passwd);
// conn.setAutoCommit(false);
// Insert
CallableStatement callInsert = conn.prepareCall("{ ? = call sp_users_insert(?, ?) }");
callInsert.registerOutParameter(1, Types.INTEGER);
callInsert.setInt(2, 6);
callInsert.setString(3, "ARRR");
callInsert.execute();
// Select
conn.setAutoCommit(false);
CallableStatement callSelect = conn.prepareCall("{ ? = call sp_users_select () }");
callSelect.registerOutParameter(1, Types.OTHER);
callSelect.execute();
ResultSet rs = (ResultSet) callSelect.getObject(1);
System.out.println(rs);
while(rs.next())
{
System.err.println("Id : " + rs.getInt(1) + " Name : " + rs.getString(2));
}
conn.commit();
// Delete
conn.setAutoCommit(false);
CallableStatement callDelete = conn.prepareCall("{ ? = call sp_users_delete (?) }");
callDelete.registerOutParameter(1, Types.INTEGER);
callDelete.setInt(2, 6);
callDelete.execute();
conn.commit();
if(callInsert != null)
callInsert.close();
if(callSelect != null)
callSelect.close();
if(callDelete != null)
callDelete.close();
if(rs != null)
rs.close();
if(conn != null)
conn.close();
}
}
| | joint 回复于：2003-07-29 22:04:10
| 已经有这么多人看了啊,呵呵,希望对有所帮助
| | netkiller 回复于：2003-10-07 15:14:19
| 用不着那么麻烦。我一直都是这么用。
[code:1:f649d17f0d]
CREATE FUNCTION reffunc(refcursor) RETURNS refcursor AS '
BEGIN
OPEN $1 FOR SELECT * FROM system_log;
RETURN $1;
END;
' LANGUAGE 'plpgsql';
BEGIN;
SELECT reffunc('funccursor');
FETCH ALL IN funccursor;
COMMIT;
public void Cursors(){
String sql = "SELECT reffunc('funccursor')";
String sql2 = "FETCH ALL IN funccursor";
DBConnect odb = null;
try{
odb = new DBConnect(oDatabase);
odb.Begin();
odb.prepareStatement(sql);
rs = odb.executeQuery();
odb.prepareStatement(sql2);
//odb.setString(1,user);
rs = odb.executeQuery();
if(rs!=null) {
while(rs.next()){
System.out.print(rs.getString(1)+"|");
System.out.print(rs.getString(2)+"|");
System.out.print(rs.getString(3)+"|");
System.out.println(rs.getString(4));
}
}
odb.Commit();
}
catch(Exception e){
e.printStackTrace();
}
finally{
try{
odb.close();
}catch(Exception e){
e.printStackTrace();
}
}
}
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