分页总是先显示页面

Question

嗨，我在使用PHP和oracle数据库设置分页时遇到问题，该页面仅显示第一页的值。 当我单击下一步按钮时，页面从页面1更改为页面2，页面3等，但该值仍与页面1相同。我不知道，我也不知道要解决此错误。

这是我用于设置记录集的代码。

<?php
// Set up recordset
define("ewSqlSelectCount", "SELECT count(*) count FROM sid_mst_dealer", true);
$sSql_count = BuildSqlang(ewSqlSelectCount, ewSqlWhere, ewSqlGroupBy, ewSqlHaving, ewSqlOrderBy, $sDbWhere, $sOrderBy);
//echo "$sSql_count" . "<br/ >";
$rs_count = moi_query($sSql_count , $conn) or die("Failed to execute query at line " . __LINE__ . ": " . moi_error($conn) . '<br>SQL: ' . $sSql);
//echo $rs_count;
oci_execute($rs_count);
$nTotalRecs = oci_fetch_array($rs_count);
$nTotalRecs = $nTotalRecs['COUNT'];

$rs = moi_query($sSql, $conn) or die("Failed to execute query at line " . __LINE__ . ": " . moi_error($conn) . '<br>SQL: ' . $sSql);
//echo $rs;
oci_execute($rs);

if ($nDisplayRecs <= 0) { // Display all records
    $nDisplayRecs = $nTotalRecs;
}
$nStartRec = 1;
SetUpStartRec(); // Set up start record position
?>

这是功能。

function SetUpStartRec()
{

  // Check for a START parameter
  global $nStartRec;
  global $nDisplayRecs;
  global $nTotalRecs;
  if (strlen($_GET[ewTblStartRec]) > 0) 
  {
     $nStartRec = $_GET[ewTblStartRec];
     $_SESSION[ewSessionTblStartRec] = $nStartRec;
  } elseif (strlen($_GET["pageno"]) > 0) 
  {
     $nPageNo = $_GET["pageno"];
     if (is_numeric($nPageNo)) 
     {
         $nStartRec = ($nPageNo-1)*$nDisplayRecs+1;

         if ($nStartRec <= 0) 
         {
            // echo 'jangan ke sini';
            $nStartRec = 1;
         } 
         elseif ($nStartRec >= (($nTotalRecs-1)/$nDisplayRecs)*$nDisplayRecs+1) 
         {
            $nStartRec = (($nTotalRecs-1)/$nDisplayRecs)*$nDisplayRecs+1;

         }
         $_SESSION[ewSessionTblStartRec] = $nStartRec;
     } 
     else 
     {

        $nStartRec = $_SESSION[ewSessionTblStartRec];
        if  (!(is_numeric($nStartRec)) || ($nStartRec == "")) 
        {
            $nStartRec = 1; // Reset start record counter
            $_SESSION[ewSessionTblStartRec] = $nStartRec;
        }
     }
 }

 else 
 {
     $nStartRec = @$_SESSION[ewSessionTblStartRec];
     if (!(is_numeric($nStartRec)) || ($nStartRec == "")) {
        $nStartRec = 1; // Reset start record counter

        $_SESSION[ewSessionTblStartRec] = $nStartRec;
     }
 }
}

这是查询

<?php
  define("ewTblVar", "sid_mst_dealer", true);
  define("ewTblRecPerPage", "RecPerPage", true);
  define("ewSessionTblRecPerPage", "sid_mst_dealer_RecPerPage", true);
  define("ewTblStartRec", "start", true);
  define("ewSessionTblStartRec", "sid_mst_dealer_start", true);
  define("ewTblShowMaster", "showmaster", true);
  define("ewSessionTblMasterKey", "sid_mst_dealer_MasterKey", true);
  define("ewSessionTblMasterWhere", "sid_mst_dealer_MasterWhere", true);
  define("ewSessionTblDetailWhere", "sid_mst_dealer_DetailWhere", true);
  define("ewSessionTblAdvSrch", "sid_mst_dealer_AdvSrch", true);
  define("ewTblBasicSrch", "psearch", true);
  define("ewSessionTblBasicSrch", "sid_mst_dealer_psearch", true);
  define("ewTblBasicSrchType", "psearchtype", true);
  define("ewSessionTblBasicSrchType", "sid_mst_dealer_psearchtype", true);
  define("ewSessionTblSearchWhere", "sid_mst_dealer_SearchWhere", true);
  define("ewSessionTblSort", "sid_mst_dealer_Sort", true);
  define("ewSessionTblOrderBy", "sid_mst_dealer_OrderBy", true);
  define("ewSessionTblKey", "sid_mst_dealer_Key", true);

  // Table level SQL
  define("ewSqlSelect", "SELECT * FROM sid_mst_dealer", true);
  if($_REQUEST[dealer_id]==""){
     if($_REQUEST[x_status]!=""){
     define("ewSqlWhere", " active_flag ='".$_REQUEST[x_status]."'", true);
    }else{
       define("ewSqlWhere", "active_flag='0'", true);
    }
  }else{
    define("ewSqlWhere", "", true);
   }
  define("ewSqlGroupBy", "", true);
  define("ewSqlHaving", "", true);
  define("ewSqlOrderBy", "", true);
  define("ewSqlOrderBySessions", "", true);
  define("ewSqlKeyWhere", "dealer_id = '@dealer_id'", true);
  define("ewSqlUserIDFilter", "", true);
?>

我真的需要帮助来解决这个问题。

Answer 1

我认为问题在于模糊的sql缺少限制，这是分页方面的难题的关键。 如果考虑以下因素：

select * from `users` where `name`='fred' limit 0,10;

这将显示前10条记录，其中用户被称为“ Fred”，然后

select * from `users` where `name`='fred' limit 10,10;

第二条语句将显示接下来的10条记录，其中用户称为“ Fred”

我只是不了解您构造sql的方法，但是IMO您需要添加一个限制-以及与计算记录集所在page相关的逻辑，以便可以添加下一个/上一个链接。

Answer 2

这是分页。

<table border="0" cellspacing="0" cellpadding="0">
                    <tr>
                      <td><span >Page&nbsp;</span>&nbsp;</td>
                      <!--first page button-->
                      <?php if ($nStartRec == 1) { ?>
                      <td><img src="images/firstdisab.gif" alt="First" width="16" height="16" border="0">&nbsp;</td>
                      <?php } else { ?>
                      <td><a href="sid_mst_dealerlist.php?start=1&x_status=<?php echo $_REQUEST[x_status]; ?>"><img src="images/first.gif" alt="First" width="16" height="16" border="0"></a>&nbsp;</td>
                      <?php } ?>
                      <!--previous page button-->
                      <?php if ($PrevStart == $nStartRec) { ?>
                      <td><img src="images/prevdisab.gif" alt="Previous" width="16" height="16" border="0">&nbsp;</td>
                      <?php } else { ?>
                      <td><a href="sid_mst_dealerlist.php?start=<?php echo $PrevStart; ?>&x_status=<?php echo $_REQUEST[x_status]; ?>"><img src="images/prev.gif" alt="Previous" width="16" height="16" border="0"></a>&nbsp;</td>
                      <?php } ?>
                      <!--current page number-->
                      <td><input type="text" name="pageno" value="<?php echo intval(($nStartRec-1)/$nDisplayRecs+1); ?>" size="4">&nbsp;</td>
                      <!--next page button-->
                      <?php if ($NextStart == $nStartRec) { ?>
                      <td><img src="images/nextdisab.gif" alt="Next" width="16" height="16" border="0">&nbsp;</td>
                      <?php } else { ?>
                      <td><a href="sid_mst_dealerlist.php?start=<?php echo $NextStart; ?>&x_status=<?php echo $_REQUEST[x_status]; ?>"><img src="images/next.gif" alt="Next" width="16" height="16" border="0"></a>&nbsp;</td>
                      <?php  } ?>
                      <!--last page button-->
                      <?php if ($LastStart == $nStartRec) { ?>
                      <td><img src="images/lastdisab.gif" alt="Last" width="16" height="16" border="0">&nbsp;</td>
                      <?php } else { ?>
                      <td><a href="sid_mst_dealerlist.php?start=<?php echo $LastStart; ?>&x_status=<?php echo $_REQUEST[x_status]; ?>"><img src="images/last.gif" alt="Last" width="16" height="16" border="0"></a>&nbsp;</td>
                      <?php } ?>
                      <td><span >&nbsp;of <?php echo intval(($nTotalRecs-1)/$nDisplayRecs+1);?></span>&nbsp;</td>
                    </tr>
                  </table>
                  <?php if ($nStartRec > $nTotalRecs) { $nStartRec = $nTotalRecs; }
$nStopRec = $nStartRec + $nDisplayRecs - 1;
$nRecCount = $nTotalRecs - 1;
if ($rsEof) { $nRecCount = $nTotalRecs; }
if ($nStopRec > $nRecCount) { $nStopRec = $nRecCount; } ?>
                  <span >Records <?php echo $nStartRec; ?> to <?php echo $nStopRec; ?> of <?php echo $nTotalRecs; ?></span>
                  <?php } else { ?>
                  <?php if ($sSrchWhere == "0=101") {?>
                  <span ></span>
                  <?php } else { ?>
                  <span >No records found</span>
                  <?php } ?>
                  <?php } ?>&nbsp;</td>
              </tr>
            </table>

Answer 3

如@RamRaider所述，您的分页方法有些含糊。 从Oracle 12c开始，您可以使用以下示例查询来实现分页。

SELECT fieldA,fieldB 
FROM table 
ORDER BY fieldA 
OFFSET 5 ROWS FETCH NEXT 14 ROWS ONLY;

访问此页面以了解有关Oracle Database 12c第1版（12.1）中top-N查询的行限制子句的更多信息