szehon-ho commented on PR #53572: URL: https://github.com/apache/spark/pull/53572#issuecomment-3688263826
Actually I did som analysis and limit the fallback "UsesCachedData" to only Show commands. All the Describe commands I tested actually are idempotent, in V2 they have an in-memory reference to DSV2 Table object, in V1 due to RelationCache. So a user triggering a second run by doing describeDf.cache() should not see any difference. Also , it is more likely that Show output is cached than Describe, as the result is typically a list of entities and bigger (though its not that likely overall). -- 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] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
