-- SW → Kra 自动升级后的旧表清理，兼容 MySQL 5.7。
-- 程序会自动调用本脚本；手工执行仅用于预览或恢复已到清理阶段的升级。
-- 自动流程已完成私有备份、结构/索引及业务角色校验后，才允许进入删除阶段。
-- 使用独立 MySQL 会话完整执行本文件；客户端需支持 DELIMITER，遇错停止，不使用 --force。
-- 默认仅预览。确认输出名单和目标库后，将下方 0 改为 1，再完整执行。
-- DROP TABLE 隐式提交，不能用 ROLLBACK 恢复；中途失败可在排除原因后重跑。
-- 删除名单为明确表名，绝不按 legacy_、bak_、sj_ 等前缀批量匹配。
-- 保留业务表、sys_schema_migrations 和 sys_business_upgrade_state；旧映射与核验明细已自动归档。
USE `sw10`;
SET @sw_cleanup_execute = 0;
SET NAMES utf8mb4;

DELIMITER $$
DROP PROCEDURE IF EXISTS sw_kra_cleanup_20261106$$
CREATE PROCEDURE sw_kra_cleanup_20261106()
cleanup_run: BEGIN
  DECLARE v_db VARCHAR(64);
  DECLARE v_lock_name VARCHAR(64);
  DECLARE v_locked INT DEFAULT 0;
  DECLARE v_prepared INT DEFAULT 0;
  DECLARE v_timeout_changed INT DEFAULT 0;
  DECLARE v_old_lock_wait BIGINT UNSIGNED;
  DECLARE v_name VARCHAR(64);
  DECLARE v_last VARCHAR(64) DEFAULT '';
  DECLARE v_message VARCHAR(128);
  DECLARE v_present INT DEFAULT 0;
  DECLARE v_dropped INT DEFAULT 0;
  DECLARE v_started DATETIME(6);
  DECLARE v_step_started DATETIME(6);
  DECLARE EXIT HANDLER FOR SQLEXCEPTION
  BEGIN
    IF v_prepared=1 THEN DEALLOCATE PREPARE sw_cleanup_drop; END IF;
    IF v_timeout_changed=1 THEN SET SESSION lock_wait_timeout=v_old_lock_wait; END IF;
    DROP TEMPORARY TABLE IF EXISTS _sw_cleanup_targets_20261106;
    DROP TEMPORARY TABLE IF EXISTS _sw_cleanup_required_tables_20261106;
    DROP TEMPORARY TABLE IF EXISTS _sw_cleanup_required_versions_20261106;
    IF v_locked=1 THEN DO RELEASE_LOCK(v_lock_name); END IF;
    RESIGNAL;
  END;

  SET v_started=SYSDATE(6), v_db=DATABASE();
  IF v_db IS NULL OR LOWER(v_db) IN ('oa','game_lx','game_hw','game_yq','mysql','sys','information_schema','performance_schema') THEN
    SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT='Refusing cleanup of source/platform/system database';
  END IF;
  IF @sw_cleanup_execute IS NULL OR @sw_cleanup_execute NOT IN (0,1) THEN
    SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT='sw_cleanup_execute must be 0 (preview) or 1 (delete)';
  END IF;
  IF @@SESSION.foreign_key_checks<>1 THEN
    SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT='Enable foreign_key_checks before cleanup';
  END IF;

  -- 与旧框架转换和 -migrate 使用同一把库级锁。
  SET v_lock_name=CONCAT('sw_to_kra:',MD5(v_db));
  SELECT GET_LOCK(v_lock_name,0) INTO v_locked;
  IF COALESCE(v_locked,0)<>1 THEN
    SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT='Migration/cleanup already running for this database';
  END IF;

  CREATE TEMPORARY TABLE _sw_cleanup_targets_20261106 (
    table_name VARCHAR(64) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin PRIMARY KEY,
    category VARCHAR(80) NOT NULL
  );
  INSERT INTO _sw_cleanup_targets_20261106(table_name,category) VALUES
    ('legacy_sw_20261103_sys_client','旧框架归档'),
    ('legacy_sw_20261103_sys_config','旧框架归档'),
    ('legacy_sw_20261103_sys_dept','旧框架归档'),
    ('legacy_sw_20261103_sys_dict_data','旧框架归档'),
    ('legacy_sw_20261103_sys_dict_type','旧框架归档'),
    ('legacy_sw_20261103_sys_login_info','旧框架归档'),
    ('legacy_sw_20261103_sys_menu','旧框架归档'),
    ('legacy_sw_20261103_sys_notice','旧框架归档'),
    ('legacy_sw_20261103_sys_oper_log','旧框架归档'),
    ('legacy_sw_20261103_sys_oss','旧框架归档'),
    ('legacy_sw_20261103_sys_oss_config','旧框架归档'),
    ('legacy_sw_20261103_sys_post','旧框架归档'),
    ('legacy_sw_20261103_sys_role','旧框架归档'),
    ('legacy_sw_20261103_sys_role_dept','旧框架归档'),
    ('legacy_sw_20261103_sys_role_menu','旧框架归档'),
    ('legacy_sw_20261103_sys_social','旧框架归档'),
    ('legacy_sw_20261103_sys_user','旧框架归档'),
    ('legacy_sw_20261103_sys_user_post','旧框架归档'),
    ('legacy_sw_20261103_sys_user_role','旧框架归档'),
    ('bak_sw2kra_20261103_sj_job','迁移前备份'),
    ('bak_sw2kra_20261103_sys_alert_operation_log','迁移前备份'),
    ('bak_sw2kra_20261103_sys_alert_record','迁移前备份'),
    ('bak_sw2kra_20261103_sys_alert_rule','迁移前备份'),
    ('bak_sw2kra_20261103_sys_client','迁移前备份'),
    ('bak_sw2kra_20261103_sys_config','迁移前备份'),
    ('bak_sw2kra_20261103_sys_dept','迁移前备份'),
    ('bak_sw2kra_20261103_sys_dict_data','迁移前备份'),
    ('bak_sw2kra_20261103_sys_dict_type','迁移前备份'),
    ('bak_sw2kra_20261103_sys_login_info','迁移前备份'),
    ('bak_sw2kra_20261103_sys_menu','迁移前备份'),
    ('bak_sw2kra_20261103_sys_message','迁移前备份'),
    ('bak_sw2kra_20261103_sys_notice','迁移前备份'),
    ('bak_sw2kra_20261103_sys_oper_log','迁移前备份'),
    ('bak_sw2kra_20261103_sys_oss','迁移前备份'),
    ('bak_sw2kra_20261103_sys_oss_config','迁移前备份'),
    ('bak_sw2kra_20261103_sys_post','迁移前备份'),
    ('bak_sw2kra_20261103_sys_role','迁移前备份'),
    ('bak_sw2kra_20261103_sys_role_dept','迁移前备份'),
    ('bak_sw2kra_20261103_sys_role_menu','迁移前备份'),
    ('bak_sw2kra_20261103_sys_social','迁移前备份'),
    ('bak_sw2kra_20261103_sys_user','迁移前备份'),
    ('bak_sw2kra_20261103_sys_user_bind_platform','迁移前备份'),
    ('bak_sw2kra_20261103_sys_user_post','迁移前备份'),
    ('bak_sw2kra_20261103_sys_user_preference','迁移前备份'),
    ('bak_sw2kra_20261103_sys_user_role','迁移前备份'),
    ('sj_distributed_lock','旧 SnailJob 框架'),
    ('sj_group_config','旧 SnailJob 框架'),
    ('sj_job','旧 SnailJob 框架'),
    ('sj_job_executor','旧 SnailJob 框架'),
    ('sj_job_log_message','旧 SnailJob 框架'),
    ('sj_job_summary','旧 SnailJob 框架'),
    ('sj_job_task','旧 SnailJob 框架'),
    ('sj_job_task_batch','旧 SnailJob 框架'),
    ('sj_namespace','旧 SnailJob 框架'),
    ('sj_notify_config','旧 SnailJob 框架'),
    ('sj_notify_recipient','旧 SnailJob 框架'),
    ('sj_retry','旧 SnailJob 框架'),
    ('sj_retry_dead_letter','旧 SnailJob 框架'),
    ('sj_retry_scene_config','旧 SnailJob 框架'),
    ('sj_retry_summary','旧 SnailJob 框架'),
    ('sj_retry_task','旧 SnailJob 框架'),
    ('sj_retry_task_log_message','旧 SnailJob 框架'),
    ('sj_server_node','旧 SnailJob 框架'),
    ('sj_system_user','旧 SnailJob 框架'),
    ('sj_system_user_permission','旧 SnailJob 框架'),
    ('sj_workflow','旧 SnailJob 框架'),
    ('sj_workflow_node','旧 SnailJob 框架'),
    ('sj_workflow_task_batch','旧 SnailJob 框架'),
    ('gen_table','旧代码生成与演示'),
    ('gen_table_column','旧代码生成与演示'),
    ('test_demo','旧代码生成与演示'),
    ('test_tree','旧代码生成与演示'),
    ('sys_alert_dedup_bak_20261020_105142_128391_5084329','旧预警去重备份'),
    ('sys_alert_dedup_bak_20261020_111958_265207_5085137','旧预警去重备份'),
    ('sw_kra_api_contract','已归档的迁移辅助表'),
    ('sw_kra_checks','已归档的迁移辅助表'),
    ('sw_kra_id_map','已归档的迁移辅助表'),
    ('sw_kra_menu_permissions','已归档的迁移辅助表'),
    ('sw_kra_state','已归档的迁移辅助表')
  ;
  CREATE TEMPORARY TABLE _sw_cleanup_required_tables_20261106 (
    table_name VARCHAR(64) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin PRIMARY KEY
  );
  INSERT INTO _sw_cleanup_required_tables_20261106(table_name) VALUES
    ('casbin_rule'),
    ('jwt_blacklists'),
    ('media_attachment_category'),
    ('media_file_upload_and_downloads'),
    ('media_uploads'),
    ('media_upload_chunks'),
    ('pay_events'),
    ('pay_orders'),
    ('sys_alert_channel_lock'),
    ('sys_alert_exemption'),
    ('sys_alert_gap'),
    ('sys_alert_operation_log'),
    ('sys_alert_record'),
    ('sys_alert_rule'),
    ('sys_announcements'),
    ('sys_apis'),
    ('sys_api_tokens'),
    ('sys_authorities'),
    ('sys_authority_apis'),
    ('sys_authority_btns'),
    ('sys_authority_departments'),
    ('sys_authority_menus'),
    ('sys_base_menus'),
    ('sys_base_menu_btns'),
    ('sys_base_menu_parameters'),
    ('sys_business_alert_locks'),
    ('sys_business_binding_locks'),
    ('sys_business_channel_effectiveness'),
    ('sys_business_effectiveness_state'),
    ('sys_business_groups'),
    ('sys_business_group_members'),
    ('sys_business_group_state'),
    ('sys_business_member_profiles'),
    ('sys_business_password_codes'),
    ('sys_business_password_resets'),
    ('sys_business_performance_goals'),
    ('sys_business_report_build_locks'),
    ('sys_data_access_logs'),
    ('sys_departments'),
    ('sys_dictionaries'),
    ('sys_dictionary_details'),
    ('sys_error'),
    ('sys_export_templates'),
    ('sys_export_template_condition'),
    ('sys_export_template_join'),
    ('sys_ignore_apis'),
    ('sys_integration_configs'),
    ('sys_login_logs'),
    ('sys_message'),
    ('sys_operation_records'),
    ('sys_params'),
    ('sys_positions'),
    ('sys_schema_migrations'),
    ('sys_security_config'),
    ('sys_timed_tasks'),
    ('sys_timed_task_logs'),
    ('sys_users'),
    ('sys_user_authority'),
    ('sys_user_bind_platform'),
    ('sys_user_departments'),
    ('sys_user_positions'),
    ('sys_user_preference'),
    ('sys_versions'),
    ('tab_game'),
    ('tab_game_server'),
    ('tab_promote'),
    ('tab_promote_apply'),
    ('tab_spend'),
    ('tab_sw_report_day'),
    ('tab_sw_report_day_key'),
    ('tab_sw_report_server_day'),
    ('tab_sw_report_server_day_key'),
    ('tab_user'),
    ('tab_user_day_login'),
    ('tab_user_play_info'),
    ('sys_business_upgrade_state')
  ;
  CREATE TEMPORARY TABLE _sw_cleanup_required_versions_20261106 (
    id VARCHAR(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin PRIMARY KEY
  );
  INSERT INTO _sw_cleanup_required_versions_20261106(id) VALUES
    ('202608200001_data_infrastructure'),
    ('202608200002_system_schema'),
    ('202608200003_payment_schema'),
    ('202608200004_payment_defaults'),
    ('202608210001_communication_integration_defaults'),
    ('202608210002_communication_surface'),
    ('202608210003_communication_test_surface'),
    ('202608220001_task_schema'),
    ('202608290001_payment_event_schema'),
    ('202608290002_payment_admin_surface'),
    ('202608290003_payment_order_read_permissions'),
    ('202608290004_kafka_integration_default'),
    ('202608290005_communication_integration_default_upgrade'),
    ('202609290001_sms_admin_surface'),
    ('202611030001_business_preference'),
    ('202611030002_business_user_fields'),
    ('202611030003_business_bindings'),
    ('202611030004_business_binding_locks'),
    ('202611030005_business_password_reset'),
    ('202611030006_business_alert_schema'),
    ('202611030007_business_alert_attachments'),
    ('202611040008_business_report_build_locks'),
    ('202611040009_business_menu_icons'),
    ('202611040010_business_alert_trigger_locks'),
    ('202611040011_business_registration_index'),
    ('202611040012_business_server_report_index'),
    ('202611040013_business_query_indexes'),
    ('202611040014_business_report_build_indexes'),
    ('202611040015_business_approved_game_index'),
    ('202611040016_business_other_settings_surface'),
    ('202611040017_business_groups_goals_effectiveness'),
    ('202611040018_business_effectiveness_query_index'),
    ('202611040019_business_performance_surface'),
    ('202611050020_business_alert_v2'),
    ('202611050021_business_alert_surface'),
    ('202611060022_business_promote_id_capacity'),
    ('202611060023_business_binding_status_index'),
    ('202611060024_business_role_identity'),
('202611060024_business_oa_remark'),
('202611060025_business_activation_surface'),
    ('202611060025_automatic_upgrade_state')
  ;

  -- 缺任意必需表时，在执行第一条 DROP 前停止。
  SET v_name=(SELECT MIN(r.table_name) FROM _sw_cleanup_required_tables_20261106 r
    WHERE NOT EXISTS (SELECT 1 FROM information_schema.tables t
      WHERE t.table_schema=v_db AND BINARY t.table_name=BINARY r.table_name AND t.table_type='BASE TABLE'));
  IF v_name IS NOT NULL THEN
    SET v_message=CONCAT('Required current table is missing: ',v_name);
    SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT=v_message;
  END IF;
  IF NOT EXISTS (SELECT 1 FROM sys_business_upgrade_state WHERE name='legacy-sw'
      AND version='20261106_automatic_v1' AND phase IN ('cleanup','complete')
      AND verified_at IS NOT NULL AND LENGTH(verified_migrations)=64
      AND cleanup_backup_path<>'' AND LENGTH(cleanup_sha256)=64) THEN
    SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT='Automatic upgrade and backup verification must finish before cleanup';
  END IF;
  -- 初次删除复核旧记录；中断后旧记录可能已删除，改由持久化的自动升级状态证明已校验。
  IF EXISTS(SELECT 1 FROM information_schema.tables WHERE table_schema=v_db AND table_name='sw_kra_state')
    AND EXISTS(SELECT 1 FROM information_schema.tables WHERE table_schema=v_db AND table_name='sw_kra_checks') THEN
  IF NOT EXISTS (SELECT 1 FROM sw_kra_state WHERE id=1
      AND version='20261103_framework_migration_v5' AND phase='completed' AND completed_at IS NOT NULL) THEN
    SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT='Legacy framework migration has not completed';
  END IF;
  IF (SELECT COUNT(DISTINCT check_name) FROM sw_kra_checks WHERE stage='backup')<>52
    OR (SELECT COUNT(DISTINCT check_name) FROM sw_kra_checks WHERE stage='migration')<>24
    OR EXISTS (SELECT 1 FROM sw_kra_checks WHERE passed<>1 OR expected_value IS NULL
      OR actual_value IS NULL OR expected_value<>actual_value) THEN
    SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT='Migration verification records are incomplete or failed';
  END IF;
  END IF;
  IF (SELECT COUNT(*) FROM sys_authorities WHERE deleted_at IS NULL AND business_level BETWEEN 1 AND 3 AND authority_id<>888)<>3
    OR (SELECT COUNT(DISTINCT business_level) FROM sys_authorities WHERE deleted_at IS NULL AND business_level BETWEEN 1 AND 3 AND authority_id<>888)<>3
    OR EXISTS(SELECT 1 FROM sys_authorities WHERE business_level IS NOT NULL AND (business_level NOT BETWEEN 1 AND 3 OR authority_id=888)) THEN
    SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT='Stable business role bindings are incomplete';
  END IF;
  IF (SELECT COUNT(*) FROM information_schema.statistics WHERE table_schema=v_db AND table_name='sys_authorities'
      AND index_name='uk_authority_business_level')<>1
    OR NOT EXISTS(SELECT 1 FROM information_schema.statistics WHERE table_schema=v_db AND table_name='sys_authorities'
      AND index_name='uk_authority_business_level' AND column_name='business_level' AND seq_in_index=1 AND non_unique=0 AND sub_part IS NULL) THEN
    SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT='Business role unique index is missing or incompatible';
  END IF;
  IF EXISTS (SELECT 1 FROM _sw_cleanup_required_versions_20261106 r
      WHERE NOT EXISTS (SELECT 1 FROM sys_schema_migrations m WHERE BINARY m.id=BINARY r.id)) THEN
    SELECT r.id AS missing_migration FROM _sw_cleanup_required_versions_20261106 r
      WHERE NOT EXISTS (SELECT 1 FROM sys_schema_migrations m WHERE BINARY m.id=BINARY r.id) ORDER BY r.id;
    SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT='Run all incremental migrations before cleanup';
  END IF;
  -- 不能仅凭手工填写 completed 状态删除尚未归档的旧框架。
  IF EXISTS (SELECT 1 FROM information_schema.tables t WHERE t.table_schema=v_db AND t.table_name IN (
    'sys_social','sys_dept','sys_user','sys_post','sys_role','sys_menu','sys_user_role','sys_role_menu',
    'sys_role_dept','sys_user_post','sys_oper_log','sys_dict_type','sys_dict_data','sys_config',
    'sys_login_info','sys_notice','sys_oss','sys_oss_config','sys_client')) THEN
    SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT='Unarchived legacy framework tables remain; cleanup stopped';
  END IF;
  IF EXISTS (SELECT 1 FROM information_schema.tables t JOIN _sw_cleanup_targets_20261106 c
      ON BINARY c.table_name=BINARY t.table_name WHERE t.table_schema=v_db AND t.table_type<>'BASE TABLE') THEN
    SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT='A cleanup target is not a base table';
  END IF;

  -- 保留外键检查；任何引用（包括其他库）都需先处理，避免删除一半才遇到约束。
  IF EXISTS (SELECT 1 FROM information_schema.key_column_usage k JOIN _sw_cleanup_targets_20261106 c
      ON BINARY k.referenced_table_name=BINARY c.table_name WHERE k.referenced_table_schema=v_db) THEN
    SELECT DISTINCT k.table_schema,k.table_name,k.constraint_name,k.referenced_table_name
      FROM information_schema.key_column_usage k JOIN _sw_cleanup_targets_20261106 c
        ON BINARY k.referenced_table_name=BINARY c.table_name WHERE k.referenced_table_schema=v_db;
    SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT='Foreign keys reference cleanup targets';
  END IF;
  -- 检查当前库的视图、触发器、事件和存储程序；定义不可见时也停止。
  IF EXISTS (SELECT 1 FROM information_schema.views v WHERE v.table_schema=v_db AND
      (v.view_definition IS NULL OR EXISTS (SELECT 1 FROM _sw_cleanup_targets_20261106 c
        WHERE LOWER(v.view_definition) REGEXP CONCAT('(^|[^0-9a-z_])',c.table_name,'([^0-9a-z_]|$)')))) THEN
    SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT='Review views referencing cleanup targets before deletion';
  END IF;
  IF EXISTS (SELECT 1 FROM information_schema.triggers t WHERE t.trigger_schema=v_db AND
      (t.action_statement IS NULL OR EXISTS (SELECT 1 FROM _sw_cleanup_targets_20261106 c
        WHERE BINARY t.event_object_table=BINARY c.table_name
          OR LOWER(t.action_statement) REGEXP CONCAT('(^|[^0-9a-z_])',c.table_name,'([^0-9a-z_]|$)')))) THEN
    SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT='Review triggers referencing cleanup targets before deletion';
  END IF;
  IF EXISTS (SELECT 1 FROM information_schema.events e WHERE e.event_schema=v_db AND
      (e.event_definition IS NULL OR EXISTS (SELECT 1 FROM _sw_cleanup_targets_20261106 c
        WHERE LOWER(e.event_definition) REGEXP CONCAT('(^|[^0-9a-z_])',c.table_name,'([^0-9a-z_]|$)')))) THEN
    SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT='Review events referencing cleanup targets before deletion';
  END IF;
  IF EXISTS (SELECT 1 FROM information_schema.routines r WHERE r.routine_schema=v_db
      AND r.routine_name<>'sw_kra_cleanup_20261106' AND
      (r.routine_definition IS NULL OR EXISTS (SELECT 1 FROM _sw_cleanup_targets_20261106 c
        WHERE LOWER(r.routine_definition) REGEXP CONCAT('(^|[^0-9a-z_])',c.table_name,'([^0-9a-z_]|$)')))) THEN
    SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT='Review routines referencing cleanup targets before deletion';
  END IF;

  SELECT COUNT(*) INTO v_present FROM information_schema.tables t JOIN _sw_cleanup_targets_20261106 c
    ON BINARY t.table_name=BINARY c.table_name WHERE t.table_schema=v_db;
  SELECT v_db AS target_database,IF(@sw_cleanup_execute=0,'PREVIEW','DELETE') AS mode,
    v_present AS existing_target_tables;
  SELECT c.table_name,c.category,IF(t.table_name IS NULL,'already absent','to delete') AS status,
    t.table_rows AS estimated_rows,COALESCE(t.data_length,0)+COALESCE(t.index_length,0) AS estimated_bytes
    FROM _sw_cleanup_targets_20261106 c LEFT JOIN information_schema.tables t
      ON t.table_schema=v_db AND BINARY t.table_name=BINARY c.table_name ORDER BY c.category,c.table_name;

  IF @sw_cleanup_execute=1 THEN
    SET v_old_lock_wait=@@SESSION.lock_wait_timeout, v_timeout_changed=1;
    -- 只限制等待元数据锁的时间，避免遗留连接占表后一直卡住；实际删除不设总超时。
    SET SESSION lock_wait_timeout=15;
    drop_loop: LOOP
      SET v_name=(SELECT MIN(table_name) FROM _sw_cleanup_targets_20261106 WHERE table_name>v_last);
      IF v_name IS NULL THEN LEAVE drop_loop; END IF;
      SET v_last=v_name;
      IF EXISTS (SELECT 1 FROM information_schema.tables WHERE table_schema=v_db AND BINARY table_name=BINARY v_name) THEN
        SET v_step_started=SYSDATE(6);
        SET @sw_cleanup_drop_sql=CONCAT('DROP TABLE IF EXISTS `',REPLACE(v_db,'`','``'),'`.`',REPLACE(v_name,'`','``'),'`');
        PREPARE sw_cleanup_drop FROM @sw_cleanup_drop_sql;
        SET v_prepared=1;
        EXECUTE sw_cleanup_drop;
        DEALLOCATE PREPARE sw_cleanup_drop;
        SET v_prepared=0, v_dropped=v_dropped+1;
        SELECT v_name AS dropped_table,TIMESTAMPDIFF(MICROSECOND,v_step_started,SYSDATE(6))/1000 AS elapsed_ms;
      END IF;
    END LOOP;
    SET SESSION lock_wait_timeout=v_old_lock_wait;
    SET v_timeout_changed=0;
  END IF;

  DROP TEMPORARY TABLE _sw_cleanup_targets_20261106;
  DROP TEMPORARY TABLE _sw_cleanup_required_tables_20261106;
  DROP TEMPORARY TABLE _sw_cleanup_required_versions_20261106;
  DO RELEASE_LOCK(v_lock_name);
  SET v_locked=0, @sw_cleanup_drop_sql=NULL;
  SELECT IF(@sw_cleanup_execute=0,'Preview completed; no tables deleted','Cleanup completed') AS result,
    v_dropped AS dropped_tables,TIMESTAMPDIFF(MICROSECOND,v_started,SYSDATE(6))/1000 AS elapsed_ms;
END cleanup_run$$
CALL sw_kra_cleanup_20261106()$$
DROP PROCEDURE sw_kra_cleanup_20261106$$
DELIMITER ;