PostgreSQL: backslashes in DC2 comment are quoted when persisted, but aren't unquoted when retrieved from DB

[ostrolucky]

So, we wanted to use https://github.com/acelaya/doctrine-enum-type with FCQN used for name of custom column type.

If type is named App\\Enum\\AuthMethod, DBAL generates this

COMMENT ON COLUMN auth_login_history.auth_method IS '(DC2Type:App\\Enum\\AuthMethod)'

This happens in PostgreSqlPlatform#quoteStringLiteral.

No reverse process happens when reading these values from DB.

Retrieving this value happens in AbstractSchemaManager#extractDoctrineTypeFromComment

In practise, this means DBAL is able to generate schema with such values, but not read it (would fail on invalid type), because Type::$_typeObjects contains unquoted FCQNs, be receives argument with quoted backslashes.

PostgreSQL 9.6.6 from official postgres docker hub and default configuration.

[ostrolucky]

Dupe of #2926

[github-actions]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.