Mysql Error Number 150 Foreign Key
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Error 1005 (hy000)
favorite I've read many other posts about receiving MySQL errno 150 when trying to add a foreign key copnstraint, however I haven't found a solution yet. I hope I'm not doing something stupid. I made a simple test case. Both tables are InnoDB. Both tables are UTF-8. Both columns are int(11) unsigned (making color_id NOT NULL doesn't make a difference). (EDIT: I WAS WRONG ABOUT THIS, AND THIS WAS error 1005 mysql THE SOLUTION) Here are my two tables: Table widgets: CREATE TABLE `widgets` ( `id` int(11) unsigned NOT NULL AUTO_INCREMENT, `name` varchar(100) NOT NULL DEFAULT '', `color_id` int(11) DEFAULT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8; Table colors: CREATE TABLE `colors` ( `id` int(11) unsigned NOT NULL AUTO_INCREMENT, `name` varchar(10) NOT NULL DEFAULT '', PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8; I just created these tables, there is no content. When I try to add a foreign key constraint to link widgets.color_id to colors.id, this happens: mysql> ALTER TABLE `widgets` ADD FOREIGN KEY (`color_id`) REFERENCES `color` (`id`); ERROR 1005 (HY000): Can't create table 'production.#sql-7b1_2dd7' (errno: 150) I'll just add that I haven't been able to use my GUI tool of choice -- Sequel Pro on OSX -- either. I get the same error message when trying to create a foreign key relationship. SHOW ENGINE INNDODB STATUS returns this: 130531 17:23:06 Error in foreign key constraint of table production/#sql-7b1_2c80: FOREIGN KEY (`color_id`) REFERENCES `colors` (`id`): Cannot find an index in the referenced table where the referenced columns appear as the first columns, or column types in the table and the referenced table do not match for constraint. Am I doing something ridiculously stupid?? mysql foreign-keys share|improve this q
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Mysql Can't Create Table Errno 150 Foreign Key
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Mysql Errno 121
6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up MySQL Foreign Key, Can't create table (errno: 150) up vote 7 down vote favorite 2 I am trying http://stackoverflow.com/questions/16866318/adding-foreign-key-fails-in-mysql-errno-150 to build the database and tables for my system. But I found that if I don't add the foreign key in the codes. There is no error. I've used many method try to make the codes works, but it still have error. I am using MySQL 5.5.31, and the codes here: CREATE DATABASE TOS; DROP TABLE TOS.USER CASCADE; DROP TABLE TOS.BILL_HEADER CASCADE; DROP TABLE TOS.TOY CASCADE; CREATE TABLE TOS.USER (User Char(8), Name http://stackoverflow.com/questions/20166573/mysql-foreign-key-cant-create-table-errno-150 Char(10), Type Char(1), Password Char(12), PRIMARY KEY(User)); CREATE TABLE TOS.BILL_HEADER (Bill_No Char(10), CTime DateTime, No_Of INTEGER, Cus_No Char(5), DTime DateTime, PRIMARY KEY(Bill_No)); CREATE TABLE TOS.TOY (Toy_Id Char(10), FullN Char(50), ShortN Char(20), Descrip Char(20), Price DECIMAL, Avail Char(1), Cat Char(1), PRIMARY KEY(Toy_Id)); CREATE TABLE TOS.BILL_ITEM (Bill_No Char(10), BSeq_No INTEGER, Toy_Id Char(10), OTime DateTime, Quan INT, DCondition Char(1), PRIMARY KEY(Bill_No,BSeq_No), FOREIGN KEY(Bill_No) REFERENCES TOS.Bill_Header(Bill_No), FOREIGN KEY(Toy_Id) REFERENCES TOS.TOY(Toy_Id)); Error: 1005 - Can't create table 'TOS.BILL_ITEM' (errno: 150) Any help would be greatly appreciated. mysql foreign-keys mysql-error-1005 share|improve this question asked Nov 23 '13 at 19:06 Confucius 1043310 It does appear to work if I remove the DROP statements.. sqlfiddle.com/#!2/08d1e –Michael Berkowski Nov 23 '13 at 19:10 2 Usually, err 150 is a foreign key error, due to a data type and length mismatch between the column and relation, or a missing index on the primary column. You do have all the correct types and PK indexes defined though. –Michael Berkowski Nov 23 '13 at 19:12 Could you try to remove only one of the foreign keys to narrow the problem? –Oscar Pérez Nov 23 '13 at 19:14 add a comment| 2 Answers 2 active oldest votes up vote 14 down vote accepted The non-descript error 150 is usually related to fo
SQL Insertion Learn how web applications with access to your database (e.g. MySQL) may be used to poison, dump, or delete information in your database. MySQL Foreign Keys Learn all about MySQL http://www.eliacom.com/mysql-gui-wp-errno-150.php foreign keys in this white paper. MySQL Foreign Key Errors and Errno: 150 Learn how to avoid MySQL foreign key errors, including the notorious Errno:150 in this white paper. MySQL/SQL Data Validation https://www.troyfawkes.com/solved-mysql-error-1005-cant-create-table-errno-150/ (with PHP) Learn the importance of data validation in web applications when information is accepted from third parties, or even from internal users. MySQL Foreign Key Errors: errno 150, errno 121, and others foreign key Diagnosing Errors SHOW ENGINE INNODB STATUS is Your New Best Friend: Click for solutionIf you get one of the really helpful errors (sarcasm) like the errno 150 or errno 121, then by simply typing in SHOW ENGINE INNODB STATUS, there is a section called "LATEST FOREIGN KEY ERROR". Under that it will give you a very helpful error message, which typically will tell you right 150 foreign key away what is the matter. What's the catch?You need SUPER privileges to run it, so if you don't have that, you'll just have to test out the following scenarios. Use Eliacom's MySQL GUI tool to catch most errors: Click for solutionYou can either download the MySQL GUI to install on your own server, or you can use our free online demo of the MySQL GUI to do it. You can check out our video on how to create foreign keys and indexes using Eliacom's MySQL GUI tool.. MySQL errno 150 ERROR 1005 (HY000): Can't create table 'table' (errno: 150) ERROR 1025 (HY000): Error on rename of 'table' to 'newtable' (errno: 150) Causes and Solutions for errno 150 Data Types Don't Match: Click for solutionThe types of the columns have to be the same (usually). This is one of the most common reasons for errno 150. For instance, if the type of the child column is VARCHAR(50), the type of the parent column should be exactly VARCHAR(50) (since they're supposed to hold the same data). For numeric types, if one is UNSIGNED, then both have to be UNSIGNED. They should match exactly!. I have
Communication Skills Training Interpersonal Skills Training Blog About Blog Troy Fawkes / Archives / Solved: MySQL ERROR 1005: Can't create table (errno: 150) (Foreign Key) Nov 27 Solved: MySQL ERROR 1005: Can't create table (errno: 150) (Foreign Key) November 27, 2011 Troy Fawkes 8 Comments Archives Share on Facebook Share 0 Share on TwitterTweet 0 Share on Google Plus Share 0 Share on Pinterest Share 0 Share on LinkedIn Share 0 This is another stupid error. It has to do with trying to successfully set foreign keys in MySQL. ERROR 1005: Can't create table (errno: 150) Great, that's fantastic. Here's an example of where this error will occur. CREATE TABLE main(
id INT UNSIGNED NOT NULL AUTO_INCREMENT,
PRIMARY KEY(id)
);
CREATE TABLE other(
id INT UNSIGNED NOT NULL AUTO_INCREMENT,
main_id INT NOT NULL,
PRIMARY KEY(id),
FOREIGN KEY(main_id) REFERENCES main(id)
); So I'm trying to make the table "other" reference the table "main" through the foreign key "main_id" and, if you try it, it'll throw an Error 150. Want the solution? The foreign key "main_id" has to have the exact same type as the primary key that it references. In the example, "main_id" in the table "other" has the type INT NOT NULL while "id" in the table "main" has the type "INT UNSIGNED NOT NULL" and also AUTO_INCREMENT, but that isn't something we have to worry about. To make things incredibly clear, here's the working example. CREATE TABLE main( id INT UNSIGNED NOT NULL AUTO_INCREMENT, PRIMARY KEY(id) ); CREATE TABLE other( id INT UNSIGNED NOT NULL AUTO_INCREMENT, main_id INT UNSIGNED NOT NULL, PRIMARY KEY(id), FOREIGN KEY(main_id) REFERENCES main(id) ); To solve ‘MySQL ERROR 1005: Can't create table (errno: 150)‘ you likely just have to ensure that your foreign key has the exact same type as the primary key. Hope it helps. Share on Facebook Share 0 Share on Tw