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class AddIndexForHeadPipelineMergeRequest < ActiveRecord::Migration[4.2]
include Gitlab::Database::MigrationHelpers
DOWNTIME = false
disable_ddl_transaction!
def up
add_concurrent_index :merge_requests, :head_pipeline_id
end
def down
remove_concurrent_index :merge_requests, :head_pipeline_id if index_exists?(:merge_requests, :head_pipeline_id)
end
end
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