alamb commented on issue #7869: URL: https://github.com/apache/arrow-datafusion/issues/7869#issuecomment-1935236242
After quite a bit of study, @appletreeisyellow and I have realized that this ticket describes something different than knowing a column is *ALL* null. This ticket describes handling predicates with only known information and > The predicate can reference columns that are not currently in memory or known at query time. In the usecase we have in InfluxDB this means getting a predicate that references columns that nothing is known about at all (neither the schema nor the values are known). I am not sure how common this usecase is across implementations, and I can not come up with any good solution. Thus, I filed a separate ticket to track handling columns whose types are known, and are known to be all `NULL` (which is also a usecase we have in InfluxDB), which I do think is a common usecase that is of general use: https://github.com/apache/arrow-datafusion/issues/9171 -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
