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