I don't understand the argument that COUNT(DISTINCT ...) cannot be parallelized, but you can count distinct values in parallel using COUNT(*) GROUP BY ...
But then again the article is being accused of heavy LLM. If you notice that COUNT(DISTINCT ...) doesn't parallelize and you ask an LLM to argue why, you get easily get an article without a good thread.
Comments
I don't understand the argument that COUNT(DISTINCT ...) cannot be parallelized, but you can count distinct values in parallel using COUNT(*) GROUP BY ...
But then again the article is being accused of heavy LLM. If you notice that COUNT(DISTINCT ...) doesn't parallelize and you ask an LLM to argue why, you get easily get an article without a good thread.