Question

我发现了这个 Stack Overflow 问题。

Distance in meters between two Spacial Points in MySQL query

我想为我的用例实现它，但出现此错误：

1210-＃1210 st_distance_sphere的参数错误。

我有一个包含这些列的数据库表：

CompanyObjectId
CompanyName
CityName
纬度
经度
CampingLocationType
PhotoUrl

如何从Latitude表中的每一行中提取Longitude和tbl_cc并计算出以米为单位的距离小于或等于300米的结果？

SELECT CompanyObjectId, CompanyName, CityName, Latitude, Longitude,
       CampingLocationType, PhotoUrl
FROM tbl_cc
WHERE st_distance_sphere(POINT(13.5145461,43.564368), POINT(Longitude, Latitude)) <= 300

我也尝试执行此查询，但是出现了相同的错误：

SELECT * FROM (SELECT CompanyObjectId, CompanyName, CityName, Latitude, Longitude,
       CampingLocationType, PhotoUrl, (st_distance_sphere(POINT(13.5145461,43.564368), POINT(Longitude, Latitude))) AS MetriDaPosizione
FROM tbl_camper_contact) AS Q WHERE MetriDaPosizione <= 300

****更新****

现在我在php中执行脚本的地方会生成此查询sql，其中包括仪表：

SELECT CompanyObjectId, CompanyName, CityName, Latitude, Longitude,
                  CampingLocationType, PhotoUrl, st_distance_sphere(point(13.5129324,43.5578855), point(CAST(Longitude AS DECIMAL(18,14)), CAST(Latitude AS DECIMAL(18,14))), 100000) as Metri
                  FROM tbl_camper_contact
            WHERE st_distance_sphere(point(13.5129324,43.5578855), point(CAST(Longitude AS DECIMAL(18,14)), CAST(Latitude AS DECIMAL(18,14))), 100000)

在mysql admin中它可以正常工作，但是在php中，我收到使我发疯的错误：

2019年12月16日星期一格林尼治标准时间[错误] [客户端93.36.55.43]- www.testcolan.it-AH01215：PHP警告：mysqli_query（）：( HY000 / 1210）：的st_distance_sphere参数不正确 /web/htdocs/www.testcolan.it/home/campit/rest_api/sql/DBOperations.php 在759行上： /web/htdocs/www.testcolan.it/home/campit/rest_api/getListaDoveSostare.php 2019年12月16日星期一16:14:26 GMT [错误] [客户端93.36.55.43]- www.testcolan.it-AH01215：PHP警告：mysqli_fetch_array（）预期参数1为mysqli_result，布尔值在 /web/htdocs/www.testcolan.it/home/campit/rest_api/GeneralFunctions.php 在第242行： /web/htdocs/www.testcolan.it/home/campit/rest_api/getListaDoveSostare.php

我的脚本php是：

public function GetListaDoveSostare($lat, $lng, $kmmin, $ordinamentoData, $localita)
{
  $metri = (intval($kmmin) * 1000);

  $com = new DbConnect();
  $sql = "";


    $sql = "SELECT CompanyObjectId, CompanyName, CityName, Latitude, Longitude,
                  CampingLocationType, PhotoUrl, st_distance_sphere(point(".floatval($lng).",".floatval($lat)."), point(CAST(Longitude AS DECIMAL(18,14)), CAST(Latitude AS DECIMAL(18,14))), $metri) as Metri
                  FROM tbl_camper_contact
            WHERE st_distance_sphere(point(".floatval($lng).",".floatval($lat)."), point(CAST(Longitude AS DECIMAL(18,14)), CAST(Latitude AS DECIMAL(18,14))), $metri)";

  mysqli_set_charset($com->getDb(), 'utf8');
  $result = mysqli_query($com->getDb(), $sql);
  return $result;
}

然后将返回值放入生成json的函数中

 public function GetListaDoveSostare($resultDoveSostare, $lat, $lng)
    {
      $dbOperationsObject = new DBOperations();
      $doveSostare= array();

        while ($row = mysqli_fetch_array($resultDoveSostare)) {

          $dove_sostare = array(
            "CompanyObjectId" => $row['CompanyObjectId'],
            "CompanyName" => $row['CompanyName'],
            "CityName" => $row['CityName'],
            "Latitude" => $row['Latitude'],
            "Longitude" => $row['Longitude'],
            "CampingLocationType" => ($row['CampingLocationType'] == "Camperplace") ? "Area Sosta" : "Campeggio",
            "PhotoUrl" => $row['PhotoUrl'],
            "MetriDaPosizioneCorrente" =>  $row['Metri']//$metri

          );

          $json= json_encode($dove_sostare);
          $dove_sostare = json_decode($json);
          array_push($doveSostare, $dove_sostare);
      }




      return $doveSostare;

    }

非常感谢您的帮助
克里斯蒂安

Answer 1

在您的第一个查询中，您没有正确传递半径：

SELECT CompanyObjectId, CompanyName, CityName, Latitude, Longitude,
       CampingLocationType, PhotoUrl
FROM tbl_cc
WHERE st_distance_sphere(POINT(13.5145461,43.564368), POINT(Longitude, Latitude)) <= 300

应该是

SELECT CompanyObjectId, CompanyName, CityName, Latitude, Longitude,
       CampingLocationType, PhotoUrl
FROM tbl_cc
WHERE st_distance_sphere(POINT(13.5145461,43.564368), POINT(Longitude, Latitude), 300)

您提到的错误会引发“如果存在radius参数但不是正数”。 请参阅this以获取更多参考信息

MYSQL：从传递2列的表中选择值：st_distance_sphere

1 个答案: