[IMPALA-9631] Import HLL functionality from DataSketches

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: Impala 4.0.0
• Component/s: Infrastructure
• Epic Link: unlabelled-IMPALA-9593
• Epic Color: ghx-label-8
• Assignee: Gabor Kaszab
• Reporter: Gabor Kaszab
• Created: 09/Apr/20 11:54
• Updated: 27/Apr/20 08:03
• Resolved: 27/Apr/20 08:03

Description

Import HLL from DataSketches into Impala:
https://github.com/apache/incubator-datasketches-cpp/tree/master/hll/include

Include it in the build system and make sure that hll.hpp can be included into Impala source files and also verify with tests that the basic functionality such as sketch creation, update() and get_result() can be invoked.