Class ActiveRecord::SchemaMigration < ActiveRecord::Base

# File activerecord/lib/active_record/schema_migration.rb, line 24
def create_table(limit=nil)
  unless table_exists?
    version_options = {null: false}
    version_options[:limit] = limit if limit

    connection.create_table(table_name, id: false) do |t|
      t.column :version, :string, version_options
    end
    connection.add_index table_name, :version, unique: true, name: index_name
  end
end

# File activerecord/lib/active_record/schema_migration.rb, line 36
def drop_table
  if table_exists?
    connection.remove_index table_name, name: index_name
    connection.drop_table(table_name)
  end
end

# File activerecord/lib/active_record/schema_migration.rb, line 16
def index_name
  "#{table_name_prefix}unique_#{ActiveRecord::Base.schema_migrations_table_name}#{table_name_suffix}"
end

# File activerecord/lib/active_record/schema_migration.rb, line 43
def normalize_migration_number(number)
  "%.3d" % number.to_i
end

# File activerecord/lib/active_record/schema_migration.rb, line 47
def normalized_versions
  pluck(:version).map { |v| normalize_migration_number v }
end

# File activerecord/lib/active_record/schema_migration.rb, line 8
def primary_key
  nil
end

# File activerecord/lib/active_record/schema_migration.rb, line 20
def table_exists?
  connection.table_exists?(table_name)
end

# File activerecord/lib/active_record/schema_migration.rb, line 12
def table_name
  "#{table_name_prefix}#{ActiveRecord::Base.schema_migrations_table_name}#{table_name_suffix}"
end

# File activerecord/lib/active_record/schema_migration.rb, line 52
def version
  super.to_i
end