MYSQL - ＃1005 - 无法创建表'dbwms.t_trucks'（errno：150）

Question

我是新来的mysql，并有随附的代码来生成数据库&表。前两个表生成的很好，但我得到了上述错误（在主题行中）。你能帮忙吗？

CREATE DATABASE IF NOT EXISTS dbwms DEFAULT CHARACTER SET `utf8`; 

USE dbwms; 

CREATE TABLE IF NOT EXISTS t_truck_types (
f_pk_ma_truck_type SMALLINT NOT NULL AUTO_INCREMENT PRIMARY KEY, 
f_sa_truck_type CHAR(4) NOT NULL UNIQUE, INDEX(f_sa_truck_type), 
f_truck_length TINYINT 
) ENGINE=InnoDB DEFAULT CHARACTER SET `utf8`; 

CREATE TABLE IF NOT EXISTS t_truck_vendors (
f_pk_ma_truck_vendor_id SMALLINT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY, 
f_sa_truck_vendor_id SMALLINT UNSIGNED NOT NULL UNIQUE, INDEX(f_sa_truck_vendor_id),  
f_truck_vendor_nickname VARCHAR(12) NOT NULL UNIQUE, INDEX(f_truck_vendor_nickname) 
) ENGINE=InnoDB DEFAULT CHARACTER SET `utf8`; 

CREATE TABLE IF NOT EXISTS t_trucks (
f_pk_ma_truck_id SMALLINT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY, 
f_truck_license_plate VARCHAR(15) NOT NULL UNIQUE, INDEX(f_truck_license_plate), 
f_fk_ma_truck_type SMALLINT UNSIGNED NOT NULL, 
f_fk_ma_truck_vendor_id SMALLINT UNSIGNED NOT NULL, 
FOREIGN KEY (f_fk_ma_truck_type) REFERENCES t_truck_types(f_pk_ma_truck_type), 
FOREIGN KEY (f_fk_ma_truck_vendor_id) REFERENCES t_truck_vendors(f_pk_ma_truck_vendor_id) 
) ENGINE=InnoDB DEFAULT CHARACTER SET `utf8`; 

在此先感谢您的帮助。

sbeeht

Answer 1

这是因为在f_fk_ma_truck_type定义t_trucks为UNSIGNED。主键和外键都应该是相同的类型。您可以在t_trucks

CREATE TABLE IF NOT EXISTS t_trucks (
f_pk_ma_truck_id SMALLINT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY, 
f_truck_license_plate VARCHAR(15) NOT NULL UNIQUE, INDEX(f_truck_license_plate), 
f_fk_ma_truck_type SMALLINT NOT NULL, 
f_fk_ma_truck_vendor_id SMALLINT UNSIGNED NOT NULL, 
FOREIGN KEY (f_fk_ma_truck_type) REFERENCES t_truck_types(f_pk_ma_truck_type), 
FOREIGN KEY (f_fk_ma_truck_vendor_id) REFERENCES t_truck_vendors(f_pk_ma_truck_vendor_id) 
) ENGINE=InnoDB DEFAULT CHARACTER SET `utf8`; 

去除unsigned或增加其在t_truck_types声明