如何使用PDO bindParam将点数据插入mysql? [英] How to insert point data into mysql using PDO bindParam?

问题描述

详细信息

我想利用mysql的空间扩展，因此我试图使用bindParam将经度和纬度存储在数据类型为POINT的mysql表中. 不幸的是，我不断收到错误SQLSTATE [23000]:违反完整性约束:1048列位置"不能为空.

I'd like to make use of mysql's spatial extension, so I am trying to store longitude and latitude in a mysql table of datatype POINT using bindParam. Unfortunately, I keep getting the error SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'location' cannot be null.

我检查了经度和纬度是否有值.因此问题必须出在我的代码上，但我看不到自己在做错什么.

I've checked that longitude and latitude have values. So the problem has to be with my code, but I cannot see what I am doing wrong.

这是我正在使用的代码.

Here is the code I am using.

$location=$latitude." ".$longitude;
$sql = "INSERT INTO my_geodata SET location = PointFromText('POINT(:location)')";
      //INSERT INTO my_geodata SET location = PointFromText('POINT(-41 12)');    

try 
{
    $stmt = $dbh->prepare($sql);            
    $stmt->bindParam(':location', $location, PDO::PARAM_STR);           
    $stmt->execute();   
    $dbh = null;
}

catch(PDOException $e)
{               
    echo $error=$e->getMessage();
}

问题

我做错了什么?如何使用PDO和bindParam将经度和纬度插入到mysql表(使用POINT数据类型)中?

What am I doing wrong? How can I insert longitude and latitude into a mysql table (that uses POINT datatype) with PDO and bindParam?

变量

根据AgreeOrNot的回答，实现此目的的方法略有不同

Based on AgreeOrNot's answer, a slightly different way to achieve this is

$location = 'POINT(' . $latitude . " " . $longitude . ')';    
$sql = "INSERT INTO my_geodata (location) VALUES (PointFromText(:location))";

推荐答案

请注意，参数化查询不是(简单的)字符串替换.在您的代码中，您的查询参数以字符串文字形式放置，将保持不变.

Note that parameterizing queries is not (simple) string replacement. In your code your query parameter is put in a string literal which will be kept untouched.

尝试一下:

$location = 'POINT(' . $latitude . " " . $longitude . ')';
$sql = "INSERT INTO my_geodata SET location = PointFromText(:location)";

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