DBAL-233: Signed / unsigned types are ignored by Comparator for MySQL schemas #1409

doctrinebot opened this Issue Mar 8, 2012 · 6 comments

2 participants


Jira issue originally created by user artem:

E.g. one schema has an column1 which is unsigned tinyint, another schema doesn't.
The sql that is generated is the following:


And it should be:


If in one schema there is an unsigned column and in the other it is signed (that being the only difference), the difference is not noticed at all.


Comment created by artem:

Fixed typo in the issue name


Comment created by @beberlei:

Due to the infinite amount of datatypes and their special options we cannot support everything in Doctrine DBAL Schema. Since signed/unsigned is not a part of the Doctrine ORM API we also do not support it in the DBAL. There are extension hooks which make this available to you, if you want to extend Doctrine in that regard.

See \Doctrine\DBAL\Schema\Column#getCustomSchemaOptions() and how Doctrine\DBAL\Schema\Comparator::diffColumn() uses them. You can fill these fields from events that are fired inside \Doctrine\DBAL\Schema\MySQLSchemaManager.


Issue was closed with resolution "Invalid"


Comment created by artem:

Thank you for your answer! and for the info of where to look, I'll try to extend the DBAL myself.
It just seemed based on the site and the docs that DBAL could be used as a more general purpose DBAL without the Doctrine ORM. Seems like a robust PHP based schema sync is an unattainable holy grail :)


Comment created by artem:

I studied the code, and it seems that there is already support for UNSIGNED in the data structures and comparison logic, however, it is simply not picked up from the column type and not saved.

I added the following code to MySqlSchemaManager::_getPortableTableColumnDefinition($tableColumn):

if (strpos(strtolower($tableColumn['type']), 'unsigned') !== false) $unsigned = 'unsigned';

and the replacing the following code to AbstractPlatfrom::getColumnDeclarationSQL($name, array $field)

$columnDef = $typeDecl . $charset . $default . $notnull . $unique . $check . $collation;

$unsigned = (isset($field['unsigned']) && $field['unsigned']) ? ' ' . $this->getUnsignedFieldDeclarationSQL() : '';
$columnDef = $typeDecl . $unsigned . $charset . $default . $notnull . $unique . $check . $collation;

And implemented getUnsignedFieldDeclarationSQL to return 'UNSIGNED'

After this UNSIGNED field types were generating correct ALTER TABLE statements.

It seems like this kind of approach could safely be integrated into Doctrine DBAL without breaking existing functionality, and making it more usable outside of ORM.


Comment created by stefano.kowalke:

Hi Benjamin,

this is an old issue and I like to try your approach to use the events. Unfortunately I can not find any event code inside MySqlSchemaManager.php but in AbstractSchemaManager.php but I have no idea how to use it. The documentation at http://docs.doctrine-project.org/projects/doctrine-dbal/en/latest/reference/events.html describes only PostConnect events but. Can you give me some more hints here? I have the same issue like the OP.

@doctrinebot doctrinebot added the Bug label Dec 6, 2015
@beberlei beberlei was assigned by doctrinebot Dec 6, 2015
@doctrinebot doctrinebot closed this Dec 6, 2015
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