PostgreSQL用於JDBC和存儲過程（功能）：ResultSet的

Question

我只是試圖調用從服務器（getStat）存儲的功能，那就是尋找這樣的：現在，這裏

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代碼：

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，現在的問題： 當我叫它，它只是打印出第一行，全散裝的，應當printend。是啊，這是明確的，因爲我執行下面的代碼：

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

但我在while循環一樣的... ...並顯示僅此而已。

也許問題是顯而易見的事情，但我缺少:(

謝謝！

Answer 1

沒必要用一個CallableStatement與{call ...}語法。

只需使用一個選擇和常規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)); 
}