Question

我正在尝试在Workbench中转发工程师ER图以创建我的架构，但是出现错误。我正在为Mac使用mySql Workbench。

这是我收到的错误消息：

 Executing SQL script in server
ERROR: Error 1064: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '
  INDEX `city_id_fk_idx` (`city_id` ASC) VISIBLE,
  INDEX `county_id_idx` (`cou' at line 13
SQL Code:
        -- -----------------------------------------------------
        -- Table `k00243666_property_bubble`.`addresses`
        -- -----------------------------------------------------
        CREATE TABLE IF NOT EXISTS `k00243666_property_bubble`.`addresses` (
          `address_id` INT NOT NULL AUTO_INCREMENT,
          `address1` VARCHAR(45) NULL,
          `address2` VARCHAR(45) NULL,
          `eircode` VARCHAR(7) NULL,
          `town_id` INT NULL,
          `city_id` INT NULL,
          `county_id` INT NULL,
          PRIMARY KEY (`address_id`),
          INDEX `town_id_fk_idx` (`town_id` ASC) VISIBLE,
          INDEX `city_id_fk_idx` (`city_id` ASC) VISIBLE,
          INDEX `county_id_idx` (`county_id` ASC) VISIBLE,
          CONSTRAINT `town_id_fk`
            FOREIGN KEY (`town_id`)
            REFERENCES `k00243666_property_bubble`.`town` (`town_id`)
            ON DELETE NO ACTION
            ON UPDATE CASCADE,
          CONSTRAINT `city_id_fk`
            FOREIGN KEY (`city_id`)
            REFERENCES `k00243666_property_bubble`.`city` (`city_id`)
            ON DELETE NO ACTION
            ON UPDATE CASCADE,
          CONSTRAINT `county_id`
            FOREIGN KEY (`county_id`)
            REFERENCES `k00243666_property_bubble`.`county` (`county_id`)
            ON DELETE NO ACTION
            ON UPDATE CASCADE)
        ENGINE = InnoDB

SQL script execution finished: statements: 5 succeeded, 1 failed

Fetching back view definitions in final form.
Nothing to fetch

有人知道我为什么收到此错误吗？

Answer 1

我的猜测是，您的MariaDB版本不支持VISIBLE或INVISIBLE应用于索引定义。无论如何，默认情况下索引应该是可见的，因此甚至不需要指定VISIBLE。尝试使用以下语法：

INDEX town_id_fk_idx (town_id),
INDEX city_id_fk_idx (city_id),
INDEX county_id_idx (county_id)

Here is a link到对MariaDB提出的功能请求。 INVISIBLE语法似乎没有关闭优化器的索引。但是，它提供了一种替代方法：

ALTER TABLE addresses DISABLE KEYS;

这将使优化器看不到所有索引。

在MySQL Workbench中正向工程ER图时出现错误1064

1 个答案: