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# frozen_string_literal: true
class AddIndexToSytemNoteMetadataDescriptionVersionId < ActiveRecord::Migration[5.2]
include Gitlab::Database::MigrationHelpers
DOWNTIME = false
disable_ddl_transaction!
def up
add_concurrent_index :system_note_metadata, :description_version_id, unique: true, where: 'description_version_id IS NOT NULL'
add_concurrent_foreign_key :system_note_metadata, :description_versions, column: :description_version_id, on_delete: :nullify
end
def down
remove_foreign_key :system_note_metadata, column: :description_version_id
remove_concurrent_index :system_note_metadata, :description_version_id
end
end
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