fail to fall back to mediumtext specified :default

[hykw]

As you know, change() in a migration file define the column with mediumtext, when you specify size: 65535 like below.

add :description, :string, null: false, size: 65535

It doesn't work well when default: is also specified like following.

add :description, :string, null: false, size: 65535, default: ""

or

add :description, :string, null: false, default: "", size: 65535

The error message, when specified the :default.

$ mix ecto.migrate

10:42:56.119 [info]  == Running Bsn.Repo.Migrations.CreateMovies.change/0 forward

10:42:56.120 [info]  create table movies
** (Mariaex.Error) (1074): Column length too big for column 'description' (max = 21845); use BLOB or TEXT instead

It occurred in this environments:

• mariaex: 0.8.2
• ecto: 2.1.4
• elixir: 1.4.2
• Erlang/OTP: 19.2

[mtokioka]

TEXT column cannot be assigned a default value.

[hykw]

Oh, thank you. I see the reason.
BTW, how about to change the error message to "BLOB/TEXT column can't have a default value", or like that?