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# frozen_string_literal: true
class ChangeCommitUserMentionsCommitIdColumnType < ActiveRecord::Migration[5.2]
include Gitlab::Database::MigrationHelpers
DOWNTIME = false
disable_ddl_transaction!
OLD_INDEX = 'commit_user_mentions_on_commit_id_and_note_id_index'
OLD_TMP_INDEX = 'temp_commit_id_and_note_id_index'
NEW_TMP_INDEX = 'temp_commit_id_for_type_change_and_note_id_index'
NEW_INDEX = 'commit_id_and_note_id_index'
# rubocop:disable Migration/PreventStrings
def up
# the initial index name is too long and fails during migration. Renaming the index first.
add_concurrent_index :commit_user_mentions, [:commit_id, :note_id], name: OLD_TMP_INDEX
remove_concurrent_index_by_name :commit_user_mentions, OLD_INDEX
change_column_type_concurrently :commit_user_mentions, :commit_id, :string
# change_column_type_concurrently creates a new index for new column `commit_id_for_type` based on existing
# `temp_commit_id_and_note_id_index` naming it `temp_commit_id_for_type_change_and_note_id_index`, yet keeping
# `temp_commit_id_and_note_id_index` for `commit_id`, that will be cleaned
# by `cleanup_concurrent_column_type_change :commit_user_mentions, :commit_id` in a later migration.
#
# So we'll rename `temp_commit_id_for_type_change_and_note_id_index` to initialy intended name: `commit_id_and_note_id_index`.
add_concurrent_index :commit_user_mentions, [:commit_id_for_type_change, :note_id], name: NEW_INDEX
remove_concurrent_index_by_name :commit_user_mentions, NEW_TMP_INDEX
end
# rubocop:enable Migration/PreventStrings
def down
cleanup_concurrent_column_type_change :commit_user_mentions, :commit_id
end
end
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