Drupal 7: What's the schema of the 'data' column in the 'users' table? I'm trying to bulk-add some users, all columns of the users table are clear less the last, the data which has some serialised data like this:

a:2:{s:13:"form_build_id";s:32:"form-153847821e107639110c0cae645b3d88";s:4:"contact";i:0;s:11:"newsletters";a:2:{i:67;i:42;}}


I'm looking for a syntax/reference for this field, so I know what I'm getting into.

thanks
There isn't a 'schema' as such, the values can be absolutely anything (that's why a serialised array is used rather than having statically defined fields).

From the user_schema() docs:


  A serialized array of name value pairs that are related to the user. Any form values posted during user edit are stored and are loaded into the $user object during user_load(). Use of this field is discouraged and it will likely disappear in a future version of Drupal.