16 lines
719 B
SQL
16 lines
719 B
SQL
-- 在每个租户业务库执行。用于并发安全地生成 im_users.account_no。
|
|
CREATE TABLE IF NOT EXISTS im_user_account_sequences (
|
|
id TINYINT UNSIGNED NOT NULL,
|
|
next_value INT UNSIGNED NOT NULL,
|
|
updated_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3)
|
|
ON UPDATE CURRENT_TIMESTAMP(3),
|
|
PRIMARY KEY (id)
|
|
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
|
|
|
|
-- 兼容已有用户数据，从当前最大账号编号继续递增，账号编号最小为 1000。
|
|
INSERT INTO im_user_account_sequences (id, next_value)
|
|
SELECT 1, GREATEST(COALESCE(MAX(account_no), 999), 999)
|
|
FROM im_users
|
|
ON DUPLICATE KEY UPDATE
|
|
next_value = GREATEST(next_value, VALUES(next_value));
|