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sequel alter table

database.alter_table :deals do
  add_column :name, String
  drop_column :column_name
  rename_column :from, :to

  add_constraint :valid_name, :name.like('A%')
  drop_constraint :constraint

  add_full_text_index :body
  add_spacial_index [columns]

  add_index :price
  drop_index :index

  add_foreign_key :artist_id, :table
  add_primary_key :id
  add_unique_constraint [columns]
  set_column_allow_null :foo, false
  set_column_default :title, ''

  set_column_type :price, 'char(10)'
end

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sequel alter table

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