information_schema.metadata_lock_info.lock_mode

Note:

One of MDL_INTENTION_EXCLUSIVE, MDL_SHARED, MDL_SHARED_HIGH_PRIO, MDL_SHARED_READ, MDL_SHARED_READ_ONLY, MDL_SHARED_WRITE, MDL_SHARED_NO_WRITE, MDL_SHARED_NO_READ_WRITE, MDL_SHARED_UPGRADABLE or MDL_EXCLUSIVE.