abhishekagarwal87 commented on a change in pull request #10503: URL: https://github.com/apache/druid/pull/10503#discussion_r504429222
########## File path: docs/querying/caching.md ########## @@ -82,3 +82,12 @@ Note that the task executor processes only support caches that keep their data l This restriction exists because the cache stores results at the level of intermediate partial segments generated by the ingestion tasks. These intermediate partial segments will not necessarily be identical across task replicas, so remote cache types such as `memcached` will be ignored by task executor processes. + +## Unsupported queries + +Query caching is not available for following +- queries, that have a union operation, do not support result-level caching - [More details](https://github.com/apache/druid/issues/8713) +- queries, that involve an Inline data source or a Lookup data source, do not support any caching. +- queries, with a sub-query in them, do not support any caching though the output of sub-queries itself may be cached. Review comment: Ack ---------------------------------------------------------------- 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. For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
