ALTER TABLE `catalog_library` ADD `release_composer` TEXT COMMENT 'Name of release artist of role composer.', ADD `release_orchestra` TEXT COMMENT 'Name of release artist of role orchestra.', ADD `release_ensembles` TEXT COMMENT 'Name of release artist of role ensemble.', ADD `release_conductor` TEXT COMMENT 'Name of release artist of role conductor.', ADD `release_listening_notes` TEXT COMMENT 'Release listening notes.', ADD `track_listening_notes` TEXT COMMENT 'Track listening notes.';; ALTER TABLE `catalog_library` DROP `release_composer`, DROP `release_orchestra`, DROP `release_ensembles`, DROP `release_conductor`, DROP `release_listening_notes`, DROP `track_listening_notes`;;