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# frozen_string_literal: true
# This migration adds temporary indexes to state_id column of issues
# and merge_requests tables. It will be used only to peform the scheduling
# for populating state_id in a post migrate and will be removed after it.
# Check: ScheduleSyncIssuablesStateIdWhereNil.
class AddTemporaryIndexesToStateId < ActiveRecord::Migration[5.1]
include Gitlab::Database::MigrationHelpers
DOWNTIME = false
disable_ddl_transaction!
def up
%w(issues merge_requests).each do |table|
add_concurrent_index(
table,
'id',
name: index_name_for(table),
where: "state_id IS NULL"
)
end
end
def down
remove_concurrent_index_by_name(:issues, index_name_for("issues"))
remove_concurrent_index_by_name(:merge_requests, index_name_for("merge_requests"))
end
def index_name_for(table)
"idx_on_#{table}_where_state_id_is_null"
end
end
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