Add migration to allow longer key and document values for precomputed queries"
user
```ruby
class IncreasePrecomputedQueryDocSize < ActiveRecord::Migration
  def change
    change_column :precomputed_query_docs, :key, :text, :limit => nil
    change_column :precomputed_query_docs, :json, :text, :limit => nil
  end
end
```
assistant