phpmyadmin mysql中的表关系没有显示

Question

所以我使用phpmyadmin创建mysql db。我已经制作了SQL脚本，运行它并且它很成功但是当我在phpmyadmin中转到db > designer时，它们之间没有关系（线）。

然而，表上的索引显示它看起来像是连接的：

我做过的示例脚本：

  CREATE TABLE IF NOT EXISTS location(
        id INT NOT NULL AUTO_INCREMENT,
        tiploc_code VARCHAR(20),
        stanox INT(10),
        crs_code CHAR(3),
        description VARCHAR(30),
        tps_description VARCHAR(30),
        PRIMARY KEY (id)
        );

我将该位置ID用作calling_points表中的外键

     CREATE TABLE IF NOT EXISTS calling_points(
    id INT NOT NULL AUTO_INCREMENT,
    schedule INT,
    calling_type INT,
    location INT,
    arrival TIME,
    departure TIME,
    passing TIME,
    platform CHAR(4),
    departure_line CHAR(3),
    arrival_line CHAR(3),
    engineering_alwc TIME,
    pathing_alwc TIME,
    performance_alwc TIME,
    PRIMARY KEY (id),
    FOREIGN KEY (schedule) REFERENCES schedule(id)
      ON DELETE CASCADE
      ON UPDATE CASCADE,
    FOREIGN KEY (calling_type) REFERENCES calling_type(id)
      ON DELETE CASCADE
      ON UPDATE CASCADE,
    FOREIGN KEY (location) REFERENCES location(id)
      ON DELETE CASCADE
      ON UPDATE CASCADE
 );

这是正常的吗？