Microsoft azure存储分页查询

Question

$filter = " ( redemption_code eq '1001')  ";    
$result = $tableRestProxy->queryEntities("Redemptions", $filter);
$entities = $result->getEntities();

foreach($entities as $entity){


}

此Microsoft Azure存储查询工作完美，可从Redemptions表中返回数千条记录。你可以帮助我如何使用start和limit参数进行分页。

Answer 1

您可以利用QueryEntitiesOptions进行查询和分页。通常，您可以使用setTop($top)从表中选择前（N）个实体，然后将queryEntities()函数请求的$tableRestProxy = ServicesBuilder::getInstance()->createTableService($connectionString); $options = new QueryEntitiesOptions(); $filter = " ( redemption_code eq '1001') "; $options->setFilter($filter); $options->setTop(100); try { $result = $tableRestProxy->queryEntities("Redemptions", $options); } catch (ServiceException $e) { $code = $e->getCode(); $error_message = $e->getMessage(); echo $code . ": " . $error_message . "<br />"; } //query next 100 entities $nextRowKey = $result->getNextRowKey(); $nextPartitionKey = $result->getNextPartitionKey(); $options->setNextRowKey($nextRowKey); $options->setNextPartitionKey($nextPartitionKey); try { $next_result = $tableRestProxy->queryEntities("Redemptions", $options); } catch (ServiceException $e) { $code = $e->getCode(); $error_message = $e->getMessage(); echo $code . ": " . $error_message . "<br />"; } 属性用于下一个（N）实体。< / p>

以下是代码段：

setFilter

更新

经过一系列测试后，如果过滤字符串不是setTop，它会同时使用RowKey和$filter，我在{{1}中使用了自定义列}字符串，它工作正常。 但是当我同时使用RowKey中的$filter列和setTop函数时，会引发您的问题。

我深入研究了源代码，发现$filter字符串未设置为line 1008 of TableRestProxy.php _buildFilterExpressionRec()，因为$queryParam字符串没有输入匹配QueryStringFilter instance处的任何条件stsm。

因此，您可以尝试利用{{3}}来设置过滤字符串。请尝试以下代码：

$filter

Answer 2

您可以看到How to do queries and pagination for Azure Table Storage in PHP

的演示

function queryPaginationEntitiesSample($tableClient, $tableName, $numPerPage, $page, $filter) 
{ 
try { 
    $options = new QueryEntitiesOptions(); 
    $options->setFilter(Filter::applyQueryString($filter)); 
    if($page== 1){ 
        $options->setTop($numPerPage); 
        $result = $tableClient->queryEntities($tableName, $options); 
        $entities = $result->getEntities(); 
    } 
    else{ 
        //skip $numPerPage * ($page-1) records 
        $options->setTop($numPerPage * ($page-1)); 
        $options->setSelectFields(array('pk')); 
        $result = $tableClient->queryEntities($tableName, $options); 
        $nextRowKey = $result->getNextRowKey(); 
        $nextPartitionKey = $result->getNextPartitionKey(); 

        $options = new QueryEntitiesOptions(); 
        $options->setFilter(Filter::applyQueryString($filter)); 
        $options->setTop($numPerPage); 
        $options->setNextRowKey($nextRowKey); 
        $options->setNextPartitionKey($nextPartitionKey); 
        $result = $tableClient->queryEntities($tableName, $options); 
        $entities = $result->getEntities(); 
    } 

    return $entities; 
} 
catch(ServiceException $e){ 
    $code = $e->getCode(); 
    $error_message = $e->getMessage(); 
    echo $code.": ".$error_message.PHP_EOL; 
    return null; 
} 
} 

示范如下：