Question

我在数据库中保存了一个json字符串，它似乎在SQL Server中正确存储，但是当尝试获取数据时，它只返回json字符串的一部分。

我正在使用PDO和json_encode来保存数据。存储的json字符串长约1000个字符，表字段允许长度为4096。

获取结果：

$sql = "SELECT TOP 1 * FROM MyTable WHERE id = :id ORDER BY id DESC;";

$params = array(
    ":id" => $id
);

$sth = $this->db->prepare($sql);
$sth->execute($params);
$result = $sth->fetch(PDO::FETCH_ASSOC);

保存结果：

$json = json_encode($_POST);

$sql = "INSERT INTO MyTable(data) VALUES (:data);";

$params = array(
    ":data" => $data
);

$stmt = $this->db->prepare($sql);
$stmt->execute($params);

存储在SQL Server中的示例Json：

{  
    "checkbox_1":"on",
    "checkbox_2":"on",
    "checkbox_3":"on",
    "text_1":"my text",
    "images":[  
        13685
    ],
    "date":"11-11-2015"
}

示例Json返回：

{  
    "checkbox_1":"on",
    "checkbox_2":"on",
    "checkbox_3":"on",
    "text_1

更新

看来返回的字符串长度始终为： 255

这可能是SQL Server配置还是PDO？

Answer 1

事实证明，当从varchar列获取时，我用于通过PDO连接到SQL Server的协议限制为255个字符。

解决方法是将列更改为TEXT或将其转换为SQL

中的文本

app.controller('EventController', function($scope){

$scope.score1 = 0;
$scope.score2 = 0;
$scope.playing = true;
$scope.win1 = false;
$scope.lose1 = false;
$scope.win2 = false;
$scope.lose2 = false;

//Counter
$scope.counter = 0;
$scope.totalScore = $scope.score1 + $scope.score2;

$scope.player1 = " Player 1";
$scope.player2 = " Player 2";

$scope.currentplayer = $scope.player1;



    $scope.switchplayer = function(){

        if ($scope.counter % 2 === 0){

            if($scope.totalScore % 2 === 0){
                $scope.currentplayer = $scope.player2;
            } else {
                $scope.currentplayer = $scope.player1;
            }

    }};



  $scope.incrementScore1 = function() {

    $scope.score1++;
    $scope.counter++;

    if ($scope.score1 === 11){

        $scope.playing = false;
        $scope.win1 = true;
        $scope.lose2 = true;
        console.log('Player 1 wins!');
    }
  };

  $scope.incrementScore2 = function() {

    $scope.score2++;
     $scope.counter++;
    if ($scope.score2 == 11){
        $scope.playing = false;
        $scope.win2 = true;
        $scope.lose1 = true;
        console.log('Player 2 wins!');
    }
  };

$scope.reset = function(){
    $scope.score1='0';
    $scope.score2='0';
    $scope.playing = true;
    $scope.win1 = false;
    $scope.lose1 = false;
    $scope.win2 = false;
    $scope.lose2 = false;
};


});

<div class="container" ng-controller='EventController'>
    <h1>Score Keeper</h1>
    <h3>Current Serve:<span>{{currentplayer}}</span></h3>
    <div class="row" ng-class="{'current': playing}">


        <div class="col-md-6" ng-click='incrementScore1();switchplayer()' ng-model='score1' ng-class="{'win1': win1, 'lose1': lose1}">
            <p>{{score1}}</p><br><br><br>
        </div>


        <div class="col-md-6" ng-model='score2' ng-click='incrementScore2();switchplayer()' ng-class="{'win2': win2, 'lose2': lose2}">
        <p>{{score2}}</p><br><br><br>
    </div>
</div>
<button ng-click='reset()'>Reset</button>
</div>

ODBC query on MS SQL Server returning first 255 characters only in PHP PDO (FreeTDS)

Answer 2

编辑：看起来OP的问题是其他问题，但我会将此问题留给未来可能有类似问题的人，可以通过查看TEXTSIZE来解决。

看起来问题可能出在SQL Server中的TEXTSIZE变量，它通过PHP限制了返回文本的长度。

查看当前使用的值

SELECT @@TEXTSIZE

并使用

将其更新为更高的值

SET TEXTSIZE 2147483647

其中数字是最大字符数（默认为/ maxes out at the above value）。

以下是TEXTSIZE：https://msdn.microsoft.com/en-us/library/ms186238.aspx

上的MSDN页面

数据库查询未返回完整字符串

2 个答案: