bigint(20) NOT NULL DEFAULT '0',
>> `quota_messages` int(11) NOT NULL DEFAULT '0',
>> PRIMARY KEY (`id`),
>> UNIQUE KEY `UNIQUE_EMAIL` (`domain_id`,`user`),
&
varchar(128) NOT NULL,
> `quota` bigint(20) NOT NULL DEFAULT '0',
> `quota_messages` int(11) NOT NULL DEFAULT '0',
> PRIMARY KEY (`id`),
> UNIQUE KEY `UNIQUE_EMAIL` (`domain_id`,`user`),
> CONSTRAINT `virtual_users_ibfk_1` FOREIGN KEY (`domain_id`)
> REFERENCES `virtual_domai
DEFAULT '0',
PRIMARY KEY (`id`),
UNIQUE KEY `UNIQUE_EMAIL` (`domain_id`,`user`),
CONSTRAINT `virtual_users_ibfk_1` FOREIGN KEY (`domain_id`)
REFERENCES `virtual_domains` (`id`) ON DELETE CASCADE
) ENGINE=InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=utf8
ota` bigint(20) NOT NULL DEFAULT 256,
>>`quota_messages` int(11) NOT NULL DEFAULT 0,
>>PRIMARY KEY (`id`),
>>UNIQUE KEY `user` (`user`),
>>FOREIGN KEY (domain_id) REFERENCES virtual_domains(id) ON DELETE
>> CASCADE
>> ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
&
,
PRIMARY KEY (`id`),
UNIQUE KEY `user` (`user`),
FOREIGN KEY (domain_id) REFERENCES virtual_domains(id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
CREATE TABLE IF NOT EXISTS `lastauth` (
`user` varchar(40) NOT NULL,
`remote_ip` varchar(18) NOT NULL,
`timestamp` timestamp
`),
FOREIGN KEY (domain_id) REFERENCES virtual_domains(id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
CREATE TABLE IF NOT EXISTS `lastauth` (
`user` varchar(40) NOT NULL,
`remote_ip` varchar(18) NOT NULL,
`timestamp` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE
MESTAMP ON
>> UPDATE CURRENT_TIMESTAMP,
>> -> PRIMARY KEY (`user`),
>> -> FOREIGN KEY (user) REFERENCES virtual_users(user) ON DELETE
>> CASCADE
>> -> ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
gt; PRIMARY KEY (`user`),
-> FOREIGN KEY (user) REFERENCES virtual_users(user) ON DELETE CASCADE
-> ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
ERROR 1215 (HY000): Cannot add foreign key constraint
root@localhost [mail]> s
-> `timestamp` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON
UPDATE CURRENT_TIMESTAMP,
-> PRIMARY KEY (`user`),
-> FOREIGN KEY (user) REFERENCES virtual_users(user) ON DELETE
CASCADE
-> ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
ERROR 1215 (HY000):
) NOT NULL DEFAULT 0,
PRIMARY KEY (`id`),
UNIQUE KEY (`user`),
FOREIGN KEY (domain_id) REFERENCES virtual_domains(id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
CREATE TABLE IF NOT EXISTS `lastauth` (
`user` varchar(40) NOT NULL,
`remote_ip` varchar(18) NOT NULL
localhost [mail]> CREATE TABLE IF NOT EXISTS `lastauth` (
>>>> -> `user` varchar(40) NOT NULL,
>>>> -> `remote_ip` varchar(18) NOT NULL,
>>>> -> `timestamp` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON
>&
E IF NOT EXISTS `lastauth` (
-> `user` varchar(40) NOT NULL,
-> `remote_ip` varchar(18) NOT NULL,
-> `timestamp` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON
UPDATE CURRENT_TIMESTAMP,
-> PRIMARY KEY (`user`),
-> FOREIGN KEY (user) REFERENCES
-> `remote_ip` varchar(18) NOT NULL,
>>-> `timestamp` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON
>>UPDATE CURRENT_TIMESTAMP,
>>-> PRIMARY KEY (`user`),
>>-> FOREIGN KEY (user) REFERENCES virtual_users(user) ON DELETE
>> C
` varchar(18) NOT NULL,
-> `timestamp` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON
UPDATE CURRENT_TIMESTAMP,
-> PRIMARY KEY (`user`),
-> FOREIGN KEY (user) REFERENCES virtual_users(user) ON DELETE CASCADE
-> ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
ERROR
estamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON
UPDATE CURRENT_TIMESTAMP,
-> PRIMARY KEY (`user`),
-> FOREIGN KEY (user) REFERENCES virtual_users(user) ON DELETE CASCADE
-> ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
ERROR 1215 (HY000): Cannot add foreign key constrain
auto_increment,
`domain_id` int(11) NOT NULL,
`user` varchar(40) NOT NULL,
`password` varchar(128) NOT NULL,
`quota` bigint(20) NOT NULL DEFAULT 256,
`quota_messages` int(11) NOT NULL DEFAULT 0,
PRIMARY KEY (`id`),
UNIQUE KEY `user` (`user`),
FOREIGN KEY (domain_id
auto_increment,
`domain_id` int(11) NOT NULL,
`user` varchar(40) NOT NULL,
`password` varchar(128) NOT NULL,
`quota` bigint(20) NOT NULL DEFAULT 256,
`quota_messages` int(11) NOT NULL DEFAULT 0,
PRIMARY KEY (`id`),
UNIQUE KEY `user` (`user`),
FOREIGN KEY (domain_id
,
`user` varchar(40) NOT NULL,
`password` varchar(128) NOT NULL,
`quota` bigint(20) NOT NULL DEFAULT 256,
`quota_messages` int(11) NOT NULL DEFAULT 0,
PRIMARY KEY (`id`),
UNIQUE KEY `user` (`user`),
FOREIGN KEY (domain_id) REFERENCES virtual_domains(id) ON DELETE CASCADE
) ENGINE
Looking at the docs:
http://dev.mysql.com/doc/refman/5.6/en/create-table-foreign-keys.html
how do I alter the child table, links, so that it has a foreign key with
the parent table, feeds?
The feed_id field in links should, in fact, be constrained by the foreign
key of feeds with a RESTRICT
Hi,
This is an example:
ALTER TABLE cart ADD CONSTRAINT fk_cart_customers FOREIGN KEY (custid)
REFERENCES customers (custid)
ON DELETE CASCADE
ON UPDATE NO ACTION;
(take from the GUI tool Database Workbench, avoids having to know the syntax
;) )
With regards,
Martijn Tonies
Upscene
On 14-11-17 01:42 AM, thufir wrote:
Looking at the docs:
http://dev.mysql.com/doc/refman/5.6/en/create-table-foreign-keys.html
how do I alter the child table, links, so that it has a foreign key with
the parent table, feeds?
The workbench GUI came up with:
ALTER TABLE `rome_aggregator
On 14-11-17 01:42 AM, thufir wrote:
Looking at the docs:
http://dev.mysql.com/doc/refman/5.6/en/create-table-foreign-keys.html
how do I alter the child table, links, so that it has a foreign key with
the parent table, feeds?
The workbench GUI came up with:
ALTER TABLE `rome_aggregator
`UNQ_links_0` (`link`),
KEY `fk_links_1_idx` (`feed_id`),
CONSTRAINT `fk_links_1` FOREIGN KEY (`feed_id`) REFERENCES `feeds`
(`id`) ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE=InnoDB AUTO_INCREMENT=270 DEFAULT CHARSET=latin1 |
I'll be reading a bit more about this.
thanks,
Thufir
--
MySQL
2014/01/06 14:24 -0500, Morgan Tocker
You might be hitting:
Important
The inline REFERENCES specifications where the references are defined as part
of the column specification are silently ignored. MySQL only accepts REFERENCES
clauses defined as part of a separate FOREIGN KEY specification
Ugh, that seems quite right. Now, why did they do that?
It was added for compatibility.
A separate specification is less convenient, and also less transparent.
Please click affects me on http://bugs.mysql.com/bug.php?id=47771
- Morgan
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Are INNODB foreign-key references ignored in 5.6?
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On 1/6/2014, 12:21 PM, h...@tbbs.net wrote:
Are INNODB foreign-key references ignored in 5.6?
You might be hitting:
Important
The inline REFERENCES specifications where the references are defined as
part of the column specification are silently ignored. MySQL only
accepts REFERENCES clauses
Am 06.01.2014 18:21, schrieb h...@tbbs.net:
Are INNODB foreign-key references ignored in 5.6?
why should they?
http://www.catb.org/~esr/faqs/smart-questions.html#beprecise
signature.asc
Description: OpenPGP digital signature
On 2013-03-21 8:12 AM, Norah Jones wrote:
I'm trying to create a foreign key on two columns but getting error...
Here's what I tried:
CREATE TABLE test2 (
ID INT NOT NULL AUTO_INCREMENT,
col1 INT NOT NULL,
col2 INT NOT NULL,
PRIMARY KEY (ID),
CONSTRAINT
On 3/21/2013 12:43 PM, Abhishek Choudhary wrote:
CREATE TABLE test2 (
ID INT NOT NULL AUTO_INCREMENT,
col1 INT NOT NULL,
col2 INT NOT NULL,
PRIMARY KEY (ID),
CONSTRAINT fk FOREIGN KEY (col1, col2)
REFERENCES test1(ID
CREATE TABLE test2 (
ID INT NOT NULL AUTO_INCREMENT,
col1 INT NOT NULL,
col2 INT NOT NULL,
PRIMARY KEY (ID),
CONSTRAINT fk FOREIGN KEY (col1, col2)
REFERENCES test1(ID, ID)
ON UPDATE CASCADE
ON DELETE RESTRICT
aspects, there is the work's author, and the work s owner. Neither is
appropriate for the same name as found in a list of people, because now a
distinction is made in the undifferentiated mass. And, yes, in general I
suspect that if in one table there are more foreign-key references to the same
, June 15, 2012 12:45 AM
To: Rick James
Cc: Shawn Green; mysql@lists.mysql.com
Subject: Re: Foreign key and uppercase / lowercase values
I think the following might give complete information (I removed some
columns not involved in the problem)
Server version: 5.1.49-3 (Debian)
SET
USER_ID from TBL_USER where USER_ID = 'giuseppe';
+--+
| USER_ID |
+--+
| GIUSEPPE |
+--+
1 row in set (0.00 sec)
update TBL_USER set USER_ID = LOWER(USER_ID) where USER_ID = 'GIUSEPPE';
ERROR 1451 (23000): Cannot delete or update a parent row: a foreign
key constraint fails
You are very close to a standalone test case. Please create such. Then post
it on bugs.mysql.com .
-Original Message-
From: GF [mailto:gan...@gmail.com]
Sent: Friday, June 15, 2012 12:45 AM
To: Rick James
Cc: Shawn Green; mysql@lists.mysql.com
Subject: Re: Foreign key
Subject: Re: Foreign key and uppercase / lowercase values
I think the following might give complete information (I removed some
columns not involved in the problem)
Server version: 5.1.49-3 (Debian)
SET collation_connection = utf8_unicode_ci; Query OK, 0 rows affected
...
Before he submits
: Friday, June 15, 2012 12:06 PM
To: Rick James
Cc: GF; mysql@lists.mysql.com
Subject: Re: Foreign key and uppercase / lowercase values
On 6/15/2012 1:00 PM, Rick James wrote:
You are very close to a standalone test case. Please create such.
Then post it on bugs.mysql.com .
-Original
On 6/15/2012 3:19 PM, Rick James wrote:
Those refer _only_ to German 'ß' LATIN SMALL LETTER SHARP S. The example GF
gave did not involve that character.
To my knowledge, that is the only case where MySQL changed a collation after
releasing it.
Yes, it has been the only occurrence.
At 16.40 15/06/2012 -0400, Shawn Green wrote:
On 6/15/2012 3:19 PM, Rick James wrote:
Those refer _only_ to German 'ß' LATIN SMALL LETTER SHARP S. The example GF
gave did not involve that character.
To my knowledge, that is the only case where MySQL changed a collation after
releasing it.
: Foreign key and uppercase / lowercase values
Good morning.
The application is Java.
The database version is : Server version: 5.1.49-3 (Debian)
This is an example of the problem:
__
mysql SET collation_connection = utf8_unicode_ci;
Query OK, 0 rows affected (0.00 sec
)
mysql update MY_TABLE set USER_ID = LOWER(USER_ID) where USER_ID = 'XXYYZZ';
ERROR 1451 (23000): Cannot delete or update a parent row: a foreign
key constraint fails etc. etc.
__
Since the used collation is _ci (I suppose it means case
insensitive) I don't understand why
Good morning,
I have an application where the user ids were stored lowercase.
Some batch import, in the user table some users stored a uppercase
id, and for some applicative logic, in other tables that have a
foreign key to the user table, their user ids are stored lowercase.
MySQL didn't throw
applicative logic, in other tables that have a
foreign key to the user table, their user ids are stored lowercase.
MySQL didn't throw any error probalby because the collation used is
case insensitive.
My problem is that the application is Java and java strings are case
sensitive, so now I want to set
...
for further discussion.
Instead of changing the data, why not do the casefolding as you SELECT into
Java?
-Original Message-
From: Ananda Kumar [mailto:anan...@gmail.com]
Sent: Wednesday, May 16, 2012 3:43 AM
To: GF
Cc: mysql@lists.mysql.com
Subject: Re: Foreign key and uppercase / lowercase
morning,
I have an application where the user ids were stored lowercase.
Some batch import, in the user table some users stored a uppercase
id, and for some applicative logic, in other tables that have a
foreign key to the user table, their user ids are stored lowercase.
...
Have you any idea how
Hi
An ideas why MySQL silently ignores any foreign key constraints I define for
the following tables?
mysql desc book;
+--+---+--+-+-+-
--+
| Field| Type | Null | Key | Default |
Extra
Try
show create table ... ;
A
On Fri, May 20, 2011 at 12:07 PM, Mimi Cafe mimic...@googlemail.com wrote:
Hi
An ideas why MySQL silently ignores any foreign key constraints I define
for
the following tables?
mysql desc book
WHat are the table engine types ?
On Fri, May 20, 2011 at 4:37 PM, Mimi Cafe mimic...@googlemail.com wrote:
Hi
An ideas why MySQL silently ignores any foreign key constraints I define
for
the following tables?
mysql desc book
Aha, got the offender. Unlike all other ones, tables book_author was MyISAM
instead of Innodb.
Now everything works
alter table book_author add foreign key (fkauthor_id) references author
(pkauthor_id);
Query OK, 12 rows affected (0.39 sec)
Records: 12 Duplicates: 0 Warnings: 0
read here (http://lists.mysql.com/mysql/171645), many-to-many relationships
in the database should be avoid. According to the link and a couple of
others I found, I'm supposed to create a separate events_categories table
and make linkages using a Foreign Key. Am not sure how to translate
and a couple of
others I found, I'm supposed to create a separate events_categories table
and make linkages using a Foreign Key. Am not sure how to translate this to
a SQL query. Can I get some help.
Thanks a million!
Regards,
Suren
font Face='Arial' style='font-size:9pt'This e-mail
a separate events_categories
table
and make linkages using a Foreign Key. Am not sure how to translate this
to
a SQL query. Can I get some help.
Thanks a million!
Regards,
Suren
font Face='Arial' style='font-size:9pt'This e-mail, and any attachments
are strictly confidential and may
://lists.mysql.com/mysql/171645), many-to-many relationships
in the database should be avoid. According to the link and a couple of
others I found, I'm supposed to create a separate events_categories table
and make linkages using a Foreign Key. Am not sure how to translate this to
a SQL query
tables. In fact this is a simplified view to
capture the essentials:
FILE
ID
NAME
DATA
DELETED
THEME
=
ID
NAME
...
DELETED
FILE_THEME
==
FILE_ID
THEME_ID
FOREIGN KEY (FILE_ID) REFERENCES FILE(ID)
FOREIGN KEY (THEME_ID) REFERENCES THEME(ID)
Because
Hi;
I have this command:
create table if not exists categoriesRelationships (ID integer
auto_increment primary key, Store varchar(60), Parent integer not null,
foreign key (Parent) references categories (ID), Child integer not null,
foreign key (Child) references categories (ID)) engine=innodb
To: mysql@lists.mysql.com
Subject: Foreign Key Error
Hi;
I have this command:
create table if not exists categoriesRelationships (ID integer
auto_increment primary key, Store varchar(60), Parent integer not null,
foreign key (Parent) references categories (ID), Child integer not null,
foreign key
: Victor Subervi [mailto:victorsube...@gmail.com]
Sent: Monday, February 14, 2011 3:09 PM
To: mysql@lists.mysql.com
Subject: Foreign Key Error
Hi;
I have this command:
create table if not exists categoriesRelationships (ID integer
auto_increment primary key, Store varchar(60), Parent integer
The idea of a foreign key is that is is, well, a *foreign key* :-) It's
meant to match up data that is in one table with data that is in another
table, and a constant obviously isn't data in your table. To be precise,
what you specify in your constraint are not even fields, but *indices
Hi,
I have the following table:
create table client(
id int unsigned not null auto_increment primary key,
name varchar(200),
type1 int unsigned not null,
type2 int unsigned not null,
constraint foreign key(type1, type2) references constants(id, type)
) engine=InnoDB;
This table is OK
For example, the following do not provide this information:
- show create table address;
- describe address;
- select * from TABLE_CONSTRAINTS;
- select * from key_column_usage;
For tables not using transactional engines like InnoDB, MySQL discards
foreign key specs, otherwise see Find
Kris,
You can use SHOW CREATE TABLE.
On Fri, Jul 2, 2010 at 7:56 PM, Kris mk...@gmx.net wrote:
Hello,
I am having trouble finding a way to retrieve the table and field a
foreign key references by querying MySQL. If you look at the following
example tables, there is no way after the tables
Hello,
I am having trouble finding a way to retrieve the table and field a
foreign key references by querying MySQL. If you look at the following
example tables, there is no way after the tables are created to learn
that:
- address.sid actually references state.id
Is this possible
key (pilot_id) references Pilots
(id);
ERROR 1452 (23000): Cannot add or update a child row: a foreign key
constraint fails (`seaflight/#sql-4d89_3ac`, CONSTRAINT
`#sql-4d89_3ac_ibfk_1` FOREIGN KEY (`pilot_id`) REFERENCES `Pilots` (`id`))
mysql alter table Pilots type=InnoDB;
Query OK, 1 row
Problem solved. I tried everything that *should* have worked and didn't.
Then I just wiped the test database and started with everything *fixed* (all
engine=innodb, all keys of same type, etc.) and it all worked.
V
Warnings: 0
mysql alter table Flights add foreign key (pilot_id) references Pilots
(id);
ERROR 1452 (23000): Cannot add or update a child row: a foreign key
constraint fails (`seaflight/#sql-4d89_3ac`, CONSTRAINT
`#sql-4d89_3ac_ibfk_1` FOREIGN KEY (`pilot_id`) REFERENCES `Pilots` (`id`))
mysql
On Tue, Jun 22, 2010 at 11:53 AM, jayabharath jbhara...@gmail.com wrote:
Hi Victor,
The actual problem is with the key field.
Flights.pilot_id is set to INT NOT NULL and you had specified Pilots.id to
INT NULL.
You have to change both the columns to NULL or else NOT NULL to avoid the
This is just for the sake of future googlers of this thread. The correct
mysql command is:
ursor.execute('create table if not exists Passengers (id int(11)
auto_increment primary key, flights_id int(11) not null, customer_id int(11)
not null, foreign key (flights_id) references Flights (id
)
File /usr/lib64/python2.4/site-packages/MySQLdb/connections.py,
line 35, in defaulterrorhandler
raise errorclass, errorvalue
OperationalError: (1452, 'Cannot add or update a child row: a foreign
key constraint fails (`seaflight/Baggage`, CONSTRAINT `Baggage_ibfk_2`
FOREIGN KEY (`customer_id
, errorvalue
OperationalError: (1452, 'Cannot add or update a child row: a foreign key
constraint fails (`seaflight/Baggage`, CONSTRAINT `Baggage_ibfk_2` FOREIGN
KEY (`customer_id`) REFERENCES `Customers` (`id`))')
However, when I try from the MySQL prompt after duly printing it out from
the code
On Wed, May 19, 2010 at 12:02 PM, Shawn Green shawn.l.gr...@oracle.comwrote:
Victor Subervi wrote:
On Wed, May 19, 2010 at 10:59 AM, Shawn Green shawn.l.gr...@oracle.com
wrote:
Shawn Green wrote:
look again closely at your FK definitions. The pattern should be
FOREIGN KEY
-foreign-key-constraints.html
You may want additional ID columns in the Passengers table to point to the
parent values in those other tables.
Please help me out here. This is what I have:
mysql describe Customers
/refman/5.1/en/innodb-foreign-key-constraints.html
You may want additional ID columns in the Passengers table to point to the
parent values in those other tables.
Please help me out here. This is what I have:
mysql describe Customers
on this table (the child table) with
the correct column on the parent table (either Flights or Customers).
You need to declare two more fields before you can link them through a
Foreign Key relationship to a field on another table:
CREATE TABLE PASSENGERS (
id int auto_increment
, flights_id int
the columns on this table (the child table) with
the correct column on the parent table (either Flights or Customers).
You need to declare two more fields before you can link them through a
Foreign Key relationship to a field on another table:
CREATE TABLE PASSENGERS (
id int auto_increment
Hi;
mysql create table if not exists Passengers (id int unsigned auto_increment
primary key, foreign key (id) references Flights (flights_id), foreign key
(id) references Customers (customer_id), name varchar(40), weight
tinyint(3));
Query OK, 0 rows affected (0.00 sec)
mysql select c.first_name
;
mysql create table if not exists Passengers (id int unsigned
auto_increment
primary key, foreign key (id) references Flights (flights_id), foreign key
(id) references Customers (customer_id), name varchar(40), weight
tinyint(3));
Query OK, 0 rows affected (0.00 sec)
mysql select c.first_name
Passengers (id int unsigned auto_increment
primary key, foreign key (id) references Flights (flights_id), foreign key
(id) references Customers (customer_id), name varchar(40), weight
tinyint(3)) engine=InnoDB;
ERROR 1005 (HY000): Can't create table './seaflight/Passengers.frm' (errno:
150)
So
On Tue, May 18, 2010 at 6:00 PM, Victor Subervi victorsube...@gmail.comwrote:
So apparently it didn't like my foreign key. Do I need to do something with
the table I'm referencing or what?
TIA.
Well, quickfix is to convert your tables to innoDB, starting with the
lowest-level (foreign-key
Johan De Meersman wrote:
On Tue, May 18, 2010 at 6:00 PM, Victor Subervi victorsube...@gmail.comwrote:
So apparently it didn't like my foreign key. Do I need to do something with
the table I'm referencing or what?
TIA.
Well, quickfix is to convert your tables to innoDB, starting
On Tue, May 18, 2010 at 1:09 PM, Shawn Green shawn.l.gr...@oracle.comwrote:
Johan De Meersman wrote:
For additional details about failed FK attempts, check the error details in
the SHOW INNODB STATUS report.
I get this:
100518 10:26:22 Error in foreign key constraint of table
seaflight
this:
100518 10:26:22 Error in foreign key constraint of table
seaflight/Passengers:
constraint foreign key (id) references Flights (flights_id), constraint
foreign key (id) references Customers (customer_id), name varchar(40),
weight tinyint(3)) engine=InnoDB:
Cannot resolve column name close
I'm trying to create a foreign key by executing the following statement:
ALTER TABLE `cc`.`takenlessons`
ADD CONSTRAINT `fk_lessons`
FOREIGN KEY (`LessonID` )
REFERENCES `cc`.`lessons` (`id` )
ON DELETE CASCADE
ON UPDATE NO ACTION
, ADD INDEX `fk_lessons` (`LessonID` ASC
Perror 121 says:
OS error code 121: Remote I/O error
Which I'm not too sure why an ALTER to add an constraint would give that error.
Normally though, foreign key errors are shown in the SHOW ENGINE INNODB STATUS
\G output, look for more details there.
Regards,
Gavin Towey
-Original
Haven't done this in a while, but I'm guessing that you can't create
both a constraint and an index with the same name?
Type mismatch will in my experience most often generate an errno 150.
/ Carsten
j...@msdlg.com skrev:
I'm trying to create a foreign key by executing the following
Interesting. Thanks for that tip on showing the INNODB STATUS. It turned up
the error:
A foreign key constraint of name `cc/fk_lessons` already exists.
...which tells me that a foreign key name cannot already be in use even if
on a different table (at least that's what it appears to be saying
Nope, that wasn't the problem. I wasn't aware that the foreign key name
must be unique. So, if you have a foreign key named fk_lesson, that same
name cannot exist already, even if on a different table. I named the
foreign key something completely different and that solved the problem.
Jesse
I have faced the same issue in past. *
key name must be a unique*.
On Fri, May 14, 2010 at 11:33 PM, j...@msdlg.com wrote:
Nope, that wasn't the problem. I wasn't aware that the foreign key name
must be unique. So, if you have a foreign key named fk_lesson, that same
name cannot exist
Hi,
I tried to remove foreign key constraint in innodb table.
I tried with different ways; but i am unable to drop the constraints.
http://lists.mysql.com/mysql/113053
It says that, droping the foreign key constraint it is not possible in innodb
engine.
Is it so? or any other possibilities
Yes - you can drop a foreign key constraint, use the 'alter table ... drop
foreign key ...' command. If you get an error message, post the error
message.
On Thu, Feb 25, 2010 at 6:03 AM, Vikram A vikkiatb...@yahoo.in wrote:
Hi,
I tried to remove foreign key constraint in innodb table.
I
An example how to delete a foreign key from an InnoDB table:
test CREATE TABLE table_1 (id int unsigned NOT NULL auto_increment
PRIMARY KEY) ENGINE=InnoDB;
Query OK, 0 rows affected (0.56 sec)
test CREATE TABLE table_2 (table1_id int unsigned NOT NULL, FOREIGN
KEY (table1_id) REFERENCES
Hi guys
Please tell me the command syntax, how to add a colmmen foreign key in
alter syntax
thanks
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Date: Sun, 17 May 2009 14:25:55 +0800
From: nathan.vorbei.t...@gmail.com
To: mysql@lists.mysql.com
Subject: how to add foreign key in alter command
Hi guys
Please tell me the command syntax, how to add a colmmen foreign key in
alter syntax
thanks
Hello Nathan,
Try
Hi,
I have the script below to create 5 tables. Three of them create fine but
two return an error of 150 which I understand to be a foreign key issue,
however I can't see anything wrong with the foreign key statements.
Could someone possibly have a look and see if they can identify the issue
Sorry all, I was being a dummy! Missed the unsigned attribute off the
foreign key columns on the problem tables.
Regards
Hi,
I have the script below to create 5 tables. Three of them create fine but
two return an error of 150 which I understand to be a foreign key issue,
however I can't
I had the same problem and was going crazy,
the ket/foreign key fields must be exactly the same.
I 'forward' engineered the database with MySQL Workbench and was almost
posting a bug!
Cheers
Claudio
2009/3/26 John Daisley john.dais...@mypostoffice.co.uk
Sorry all, I was being a dummy
trouble with is the DELETE code generator -- more
specifically, resolving foreign key references.
Basically, what I have is a tree built in memory, so I can go:
tableinfo['thetable']['fieldname']['refs']
And get a complete list of all the tables (and the fields within that table)
that reference
:
Andy Shellam wrote:
Am I missing something here? (It is late after a long day, I admit!)
Only something I forgot to mention.
All the foreign keys are set up as ON DELETE RESTRICT, meaning MySQL's
response to a foreign key violation is to spit out an error message to
the
effect of I'm
of their
foreign-key dependency.
~Andrew
On Tue, Feb 3, 2009 at 3:40 PM, Philip Pemberton usene...@philpem.me.uk wrote:
Hi,
First of all, I apologise in advance for any mind-altering, or
headache-inducing effects this question may have. I've spent the past two
days trying to figure it out, and all
Andy Shellam wrote:
Am I missing something here? (It is late after a long day, I admit!)
Only something I forgot to mention.
All the foreign keys are set up as ON DELETE RESTRICT, meaning MySQL's
response to a foreign key violation is to spit out an error message to the
effect of I'm sorry
Hi Philip,
Am I missing something here? (It is late after a long day, I admit!)
In the example case you've given, if the foreign key in Parts is set to
ON DELETE CASCADE, and you delete a row from Manufacturer, MySQL will
first delete the associated records in Parts before deleting the row
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