PostgreSQL用于JDBC和存储过程（功能）：ResultSet的

Question

我只是试图调用从服务器（getStat）存储的功能，那就是寻找这样的：现在，这里

create type stat as (type text, location text, number int); 
create function getStat() returns setof stat as 'select distinct table1.type, table1.location, table1.number from table1, table2 where table2.finding=10 order by number desc;' language 'sql'; 

是JDBC代码：

CallableStatement callable = null; 

    String storedProc = "{call getStat(?, ?, ?)}"; 

    try { 
     callable = connection.prepareCall(storedProc); 

     callable.registerOutParameter(1, java.sql.Types.VARCHAR); 
     callable.registerOutParameter(2, java.sql.Types.VARCHAR); 
     callable.registerOutParameter(3, java.sql.Types.INTEGER); 

     boolean results = callable.execute(); 

     System.out.println(callable.getString(1)); 
     System.out.println(callable.getString(2)); 
     System.out.println(callable.getInt(3)); 

     while(results){ 
      ResultSet rs = callable.getResultSet(); 
      while(rs.next()){ 
       System.out.println(rs.getString(1)); 
       System.out.println(rs.getString(2)); 
       System.out.println(rs.getInt(3)); 
      } 
      //rs.close(); 

      results = callable.getMoreResults(); 
     } 

好了，现在的问题： 当我叫它，它只是打印出第一行，全散装的，应当printend。是啊，这是明确的，因为我执行下面的代码：

  System.out.println(callable.getString(1)); 
      System.out.println(callable.getString(2)); 
      System.out.println(callable.getInt(3)); 

但我在while循环一样的... ...并显示仅此而已。

也许问题是显而易见的事情，但我缺少:(

谢谢！

Answer 1

没必要用一个CallableStatement与{call ...}语法。

只需使用一个选择和常规Statement：

Statement stmt = connection.createStatement(); 
ResultSet rs = stmt.executeQuery("select * from getStat()"); 
while (rs.next()) 
{ 
    System.out.println(rs.getString(1)); 
    System.out.println(rs.getString(2)); 
    System.out.println(rs.getInt(3)); 
}