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# See http://doc.gitlab.com/ce/development/migration_style_guide.html
# for more information on how to write migrations for GitLab.
class RemoveUnnecessaryIndexes < ActiveRecord::Migration
include Gitlab::Database::MigrationHelpers
disable_ddl_transaction!
DOWNTIME = false
def up
remove_index :labels, column: :group_id if index_exists?(:labels, :group_id)
remove_index :award_emoji, column: :user_id if index_exists?(:award_emoji, :user_id)
remove_index :ci_builds, column: :commit_id if index_exists?(:ci_builds, :commit_id)
remove_index :deployments, column: :project_id if index_exists?(:deployments, :project_id)
remove_index :deployments, column: ["project_id", "environment_id"] if index_exists?(:deployments, ["project_id", "environment_id"])
remove_index :lists, column: :board_id if index_exists?(:lists, :board_id)
remove_index :milestones, column: :project_id if index_exists?(:milestones, :project_id)
remove_index :notes, column: :project_id if index_exists?(:notes, :project_id)
remove_index :users_star_projects, column: :user_id if index_exists?(:users_star_projects, :user_id)
end
def down
add_concurrent_index :labels, :group_id
add_concurrent_index :award_emoji, :user_id
add_concurrent_index :ci_builds, :commit_id
add_concurrent_index :deployments, :project_id
add_concurrent_index :deployments, ["project_id", "environment_id"]
add_concurrent_index :lists, :board_id
add_concurrent_index :milestones, :project_id
add_concurrent_index :notes, :project_id
add_concurrent_index :users_star_projects, :user_id
end
end
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