The following doesn't work for me:

%sql
SELECT user_id, array_size(education) AS edu_cnt
FROM users
ORDER BY edu_cnt DESC 
LIMIT 10; 

I get an error saying:

Error in SQL statement: AnalysisException: Undefined function: array_size. This function is neither a built-in/temporary function, nor a persistent function that is qualified as spark_catalog.default.array_size.; line 1 pos 16

The documentation pretty clearly says this function exists. Help?