具有变量BETWEEN的DB2 SQL分页

debugcn 发表于 Dev

多米尼克·德沙特（Dominique deschatre）

因此，我必须使用DB2对站点数据库进行分页，每页显示10个结果。但是，当我使用时FETCH FIRST 10 ROWS ONLY，所有页面都显示相同的10个第一结果。我搜索并确定必须使用BETWEEN 0 AND 9范围变量，但是无论如何我都无法正确理解SQL代码。我总是收到错误消息odbc_fetch_row(): supplied argument is not a valid ODBC result resource。

我为偏移量创建了变量：

//offset for the query
$limit = 10;
$offset = ($currentpage - 1)  * $limit;
$start = $offset + 1;
$end = min(($offset + $limit), $total);
$offsetend = $end - 1;

并从数据库获取了信息：

$busca="";
    if(isset($_GET['palavra']))
    {
        $busca=($_GET['palavra']);
    }
    $SQL1 = "SELECT PALAVRA.CODPAL, PALAVRA.NMPAL, PALAVRA.NMLIBTRANS 
    FROM (SELECT ROW_NUMBER() OVER (ORDER BY PALAVRA.NMPAL ASC) AS ROWNUM
    FROM MAXADM.PALAVRA WHERE PALAVRA.NMPAL LIKE '$busca%') AS P 
    WHERE P.ROWNUM BETWEEN $offset AND $offsetend";

    $rs1=getInfo($SQL1);
    while(odbc_fetch_row($rs1))
    {
    $cod_palavra = odbc_result($rs1,"CODPAL");
    $palavra = odbc_result($rs1,"NMPAL");
    $librastrans = odbc_result($rs1,"NMLIBTRANS");
    }

我究竟做错了什么？太感谢了！

Mustaccio

就目前而言，具有相关名称的子选择P仅包含一列ROWNUM：

SELECT PALAVRA.CODPAL, PALAVRA.NMPAL, PALAVRA.NMLIBTRANS 
FROM (
  SELECT ROW_NUMBER() OVER (ORDER BY PALAVRA.NMPAL ASC) AS ROWNUM
    FROM MAXADM.PALAVRA WHERE PALAVRA.NMPAL LIKE '$busca%'
) AS P 
WHERE P.ROWNUM BETWEEN $offset AND $offsetend

因此您显然无法从中选择PALAVRA.CODPAL, PALAVRA.NMPAL, PALAVRA.NMLIBTRANS。

尝试将查询重写为

SELECT P.CODPAL, P.NMPAL, P.NMLIBTRANS 
FROM (
  SELECT 
    PALAVRA.CODPAL, PALAVRA.NMPAL, PALAVRA.NMLIBTRANS,
    ROW_NUMBER() OVER (ORDER BY PALAVRA.NMPAL ASC) AS ROWNUM
  FROM MAXADM.PALAVRA WHERE PALAVRA.NMPAL LIKE '$busca%'
) AS P 
WHERE P.ROWNUM BETWEEN $offset AND $offsetend

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