-- Additive encrypted per-stage checkpoint; re-runnable on supported MySQL versions.
SET @fa_sql = IF((SELECT COUNT(*) FROM information_schema.COLUMNS WHERE TABLE_SCHEMA=DATABASE() AND TABLE_NAME='zyt_followup_audio_task' AND COLUMN_NAME='pipeline_cipher')=0,
 'ALTER TABLE `zyt_followup_audio_task` ADD COLUMN `pipeline_cipher` longtext NULL', 'SELECT 1');
PREPARE fa_stmt FROM @fa_sql;
EXECUTE fa_stmt;
DEALLOCATE PREPARE fa_stmt;