Hi Jinseong, I saw your question on the Drill list. I think the issue you're having is relating to the quotes. Single quotes should be used to escape string values. Back ticks should be used for the actual variable name. IE:
ALTER SYSTEM SET `system.some_variable` = 'value'; Please let us know if that works. Here's the docs for that as well (https://drill.apache.org/docs/alter-system/) Best, -- C
