[DBAL-122] Impossible to save data to image/binary/varbinary

Wed, 22 Feb 2012 16:28:32 +0000

When trying to insert a value into a Column with type 'image', 'binary' or 'varbinary' the SQLServer states that this is not possible.
When trying to insert into 'binary' or 'varbinary' the error message is:
=> Implicit conversion from nvarchar(max) datatype to varbinary(max) is not allowed.

When trying to insert into 'image' the error message is:
=> Operand collision: nvarchar(max) is incompatible with image.

Doctrine prepares the image/binary/varbinary column in the statements as nvarchar(max) which is wrong.

The cause of this error is that in the MsSQLPlatform::getVarcharTypeDeclarationSQLSnippet($length, $fixed),
or in the datatype mapping which is to 'text'.

The documentation for the MsSQLServer states following conversions (http://207.46.16.252/de-de/library/ms187928.aspx):

*char => binary/varbinary : Explicit conversion
nchar/nvarchar => image : IMPOSSIBLE

So the solution would be, either to leave the datatype blank or use the char/varchar datatype when saving into image/binary/varbinary, which would cause an extra datatype as those would collide with 'text' I guess.

Doctrine Project

[DBAL-122] Impossible to save data to image/binary/varbinary