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# frozen_string_literal: true
class AddExtraIndexToLabelLinks < ActiveRecord::Migration[6.0]
include Gitlab::Database::MigrationHelpers
DOWNTIME = false
INDEX_COVERING_ALL_COLUMNS = 'index_on_label_links_all_columns'
INDEX_TO_REPLACE = 'index_label_links_on_label_id'
NEW_INDEX = 'index_label_links_on_label_id_and_target_type'
disable_ddl_transaction!
def up
add_concurrent_index :label_links, [:target_id, :label_id, :target_type], name: INDEX_COVERING_ALL_COLUMNS
add_concurrent_index :label_links, [:label_id, :target_type], name: NEW_INDEX
remove_concurrent_index_by_name(:label_links, INDEX_TO_REPLACE)
end
def down
remove_concurrent_index_by_name(:label_links, INDEX_COVERING_ALL_COLUMNS)
add_concurrent_index(:label_links, :label_id, name: INDEX_TO_REPLACE)
remove_concurrent_index_by_name(:label_links, NEW_INDEX)
end
end
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