-- Optimize /iot/device/statistic count queries on large log tables.
-- Execute once on existing databases. If an index already exists, skip that ALTER.

ALTER TABLE `iot_device_log`
    ADD INDEX `idx_device_log_stat_user_type_monitor` (`user_id`, `log_type`, `is_monitor`);

ALTER TABLE `iot_event_log`
    ADD INDEX `idx_event_log_stat_user_type` (`user_id`, `log_type`);

ALTER TABLE `iot_function_log`
    ADD INDEX `idx_function_log_stat_user_type` (`user_id`, `fun_type`);