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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 ReorganiseIssuesIndexesForFasterSorting < ActiveRecord::Migration
include Gitlab::Database::MigrationHelpers
# Set this constant to true if this migration requires downtime.
DOWNTIME = false
disable_ddl_transaction!
REMOVE_INDEX_COLUMNS = %i[project_id created_at due_date updated_at].freeze
ADD_INDEX_COLUMNS = [
%i[project_id created_at id state],
%i[project_id due_date id state],
%i[project_id updated_at id state]
].freeze
TABLE = :issues
def up
add_indexes(ADD_INDEX_COLUMNS)
remove_indexes(REMOVE_INDEX_COLUMNS)
end
def down
add_indexes(REMOVE_INDEX_COLUMNS)
remove_indexes(ADD_INDEX_COLUMNS)
end
def add_indexes(columns)
columns.each do |column|
add_concurrent_index(TABLE, column) unless index_exists?(TABLE, column)
end
end
def remove_indexes(columns)
columns.each do |column|
remove_concurrent_index(TABLE, column) if index_exists?(TABLE, column)
end
end
end
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