mkaravel opened a new pull request, #41021: URL: https://github.com/apache/spark/pull/41021
### What changes were proposed in this pull request? This is a follow-up PR to #40615. In this PR we nake sure that all sketches produces by the new expressions `hll_sketch_agg`, `hll_union_agg` and `hll_union` are actually HLL DataSketches represented with 8-nit registers. Using 8-bit registers improves the performance of the expressions at the expense of using more memory(the current implementation uses 4-bit registers by default). ### Why are the changes needed? To improve the performance of the new HLL-related expressions. ### Does this PR introduce _any_ user-facing change? No ### How was this patch tested? Existing tests suffice. -- 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]
