-- =============================================================================
-- CRM 业务管线表名规范化：yz_tenant_crm_* → yz_backend_crm_*
--
-- 目的：与 yz_backend_erp_*、yz_backend_contact_company 等保持统一前缀，便于查找维护。
--
-- 映射：
--   yz_tenant_crm_clue           → yz_backend_crm_clue
--   yz_tenant_crm_business       → yz_backend_crm_business
--   yz_tenant_crm_project        → yz_backend_crm_project
--   yz_tenant_crm_follow         → yz_backend_crm_follow
--   yz_tenant_crm_attach         → yz_backend_crm_attach
--   yz_tenant_crm_entity_contact → yz_backend_crm_entity_contact
--   yz_tenant_crm_operate_log    → yz_backend_crm_operate_log
--
-- 说明：
--   - RENAME TABLE 是原子改名，数据、索引、自增全部原样保留，不会丢数据；
--   - 幂等：新表已存在或旧表不存在时自动跳过；
--   - 注意：需与新版后端一起发布（模型表名已指向 yz_backend_crm_*）。
-- =============================================================================

SET NAMES utf8mb4;

-- 1. 线索
SET @has_old := (SELECT COUNT(*) FROM information_schema.TABLES WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'yz_tenant_crm_clue');
SET @has_new := (SELECT COUNT(*) FROM information_schema.TABLES WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'yz_backend_crm_clue');
SET @sql := IF(@has_old > 0 AND @has_new = 0, 'RENAME TABLE `yz_tenant_crm_clue` TO `yz_backend_crm_clue`', 'SELECT ''skip: clue'' AS note');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;

-- 2. 商机
SET @has_old := (SELECT COUNT(*) FROM information_schema.TABLES WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'yz_tenant_crm_business');
SET @has_new := (SELECT COUNT(*) FROM information_schema.TABLES WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'yz_backend_crm_business');
SET @sql := IF(@has_old > 0 AND @has_new = 0, 'RENAME TABLE `yz_tenant_crm_business` TO `yz_backend_crm_business`', 'SELECT ''skip: business'' AS note');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;

-- 3. 项目
SET @has_old := (SELECT COUNT(*) FROM information_schema.TABLES WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'yz_tenant_crm_project');
SET @has_new := (SELECT COUNT(*) FROM information_schema.TABLES WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'yz_backend_crm_project');
SET @sql := IF(@has_old > 0 AND @has_new = 0, 'RENAME TABLE `yz_tenant_crm_project` TO `yz_backend_crm_project`', 'SELECT ''skip: project'' AS note');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;

-- 4. 回访/跟进记录
SET @has_old := (SELECT COUNT(*) FROM information_schema.TABLES WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'yz_tenant_crm_follow');
SET @has_new := (SELECT COUNT(*) FROM information_schema.TABLES WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'yz_backend_crm_follow');
SET @sql := IF(@has_old > 0 AND @has_new = 0, 'RENAME TABLE `yz_tenant_crm_follow` TO `yz_backend_crm_follow`', 'SELECT ''skip: follow'' AS note');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;

-- 5. 附件
SET @has_old := (SELECT COUNT(*) FROM information_schema.TABLES WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'yz_tenant_crm_attach');
SET @has_new := (SELECT COUNT(*) FROM information_schema.TABLES WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'yz_backend_crm_attach');
SET @sql := IF(@has_old > 0 AND @has_new = 0, 'RENAME TABLE `yz_tenant_crm_attach` TO `yz_backend_crm_attach`', 'SELECT ''skip: attach'' AS note');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;

-- 6. 联系人
SET @has_old := (SELECT COUNT(*) FROM information_schema.TABLES WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'yz_tenant_crm_entity_contact');
SET @has_new := (SELECT COUNT(*) FROM information_schema.TABLES WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'yz_backend_crm_entity_contact');
SET @sql := IF(@has_old > 0 AND @has_new = 0, 'RENAME TABLE `yz_tenant_crm_entity_contact` TO `yz_backend_crm_entity_contact`', 'SELECT ''skip: entity_contact'' AS note');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;

-- 7. 操作日志
SET @has_old := (SELECT COUNT(*) FROM information_schema.TABLES WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'yz_tenant_crm_operate_log');
SET @has_new := (SELECT COUNT(*) FROM information_schema.TABLES WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'yz_backend_crm_operate_log');
SET @sql := IF(@has_old > 0 AND @has_new = 0, 'RENAME TABLE `yz_tenant_crm_operate_log` TO `yz_backend_crm_operate_log`', 'SELECT ''skip: operate_log'' AS note');
PREPARE stmt FROM @sql; EXECUTE stmt; DEALLOCATE PREPARE stmt;

-- 8. 核对结果
SELECT TABLE_NAME, TABLE_ROWS, CREATE_TIME
FROM information_schema.TABLES
WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME LIKE 'yz_%crm_%'
ORDER BY TABLE_NAME;