While循环不适用于具有两个表的联接查询

Question

我正在尝试使用一个简单的联接查询从2个表中选择数据，第一个是倡议，第二个是包含带有点的空间表的位置。但是我认为我用联接查询犯了一个新手错误。

<?php
$qx = "SELECT initiatives.location_id as init_location, locations.location as locations_coord, locations.name as locations_name FROM locations JOIN initiatives on  initiatives.location_id = locations.id";

if ($query = $connect->query($qx)) {
 echo "done";
}
else {
 echo $connect->error;
}

// $count = $query->num_rows;

$row = 1;

while ($fetch = $query->fetch_array(MYSQLI_ASSOC)) {
 echo "test A";
 $point = $fetch['ST_AsText(locations_coord)'];
 $point = str_replace(array(
  "POINT(",
  ")"
 ) , array(
  "",
  ""
 ) , $point);
 $point = str_replace(" ", ",", $point);
}

这不允许我将St用作文本，不确定为什么，如果我对它可以工作的位置进行查询

我如何解决：

$qx = "SELECT initiatives.location_id as init_location, ST_AsText(locations.location) as locations_coord, locations.name as locations_name FROM locations JOIN initiatives on  initiatives.location_id = locations.id";