68 lines
2.5 KiB
SQL
68 lines
2.5 KiB
SQL
-- +goose Up
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-- +goose StatementBegin
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CREATE TABLE IF NOT EXISTS chat_admin_conversation_states (
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id BIGINT UNSIGNED PRIMARY KEY AUTO_INCREMENT,
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conversation_id BIGINT UNSIGNED NOT NULL COMMENT '会话ID',
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admin_user_id BIGINT UNSIGNED NOT NULL COMMENT '管理员ID',
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remark VARCHAR(128) NOT NULL DEFAULT '' COMMENT '管理员个人备注',
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last_read_message_id BIGINT UNSIGNED NOT NULL DEFAULT 0 COMMENT '最后已读消息ID',
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last_read_at DATETIME NULL COMMENT '最后已读时间',
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created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
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updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
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UNIQUE KEY uk_chat_admin_conversation_state (conversation_id, admin_user_id),
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KEY idx_chat_admin_state_admin (admin_user_id, conversation_id),
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KEY idx_chat_admin_state_read (admin_user_id, last_read_message_id)
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) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='管理员会话个人状态';
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INSERT INTO chat_admin_conversation_states (
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conversation_id, admin_user_id, remark, last_read_message_id, last_read_at
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)
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SELECT
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cp.conversation_id,
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cp.participant_id,
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cp.remark,
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COALESCE((
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SELECT MAX(cm.id)
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FROM chat_messages cm
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WHERE cm.conversation_id = cp.conversation_id
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AND cp.last_read_at IS NOT NULL
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AND cm.created_at <= cp.last_read_at
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), 0),
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cp.last_read_at
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FROM chat_participants cp
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WHERE cp.participant_type = 'admin'
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AND (cp.remark <> '' OR cp.last_read_at IS NOT NULL)
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ON DUPLICATE KEY UPDATE
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remark = VALUES(remark),
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last_read_message_id = GREATEST(last_read_message_id, VALUES(last_read_message_id)),
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last_read_at = CASE
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WHEN last_read_at IS NULL THEN VALUES(last_read_at)
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WHEN VALUES(last_read_at) IS NULL THEN last_read_at
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ELSE GREATEST(last_read_at, VALUES(last_read_at))
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END;
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ALTER TABLE chat_conversations
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ADD INDEX idx_chat_conversations_status_activity (status, last_message_at, id),
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ADD INDEX idx_chat_conversations_type_scene_activity (type, support_scene, last_message_at, id);
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-- 后台客服列表需要按商品快速定位最新订单，避免为每个会话执行全表排序。
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ALTER TABLE rental_orders
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ADD INDEX idx_rental_orders_listing_id_id (listing_id, id);
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-- +goose StatementEnd
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-- +goose Down
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-- +goose StatementBegin
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ALTER TABLE rental_orders
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DROP INDEX idx_rental_orders_listing_id_id;
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ALTER TABLE chat_conversations
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DROP INDEX idx_chat_conversations_type_scene_activity,
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DROP INDEX idx_chat_conversations_status_activity;
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DROP TABLE IF EXISTS chat_admin_conversation_states;
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-- +goose StatementEnd
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