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https://issues.apache.org/jira/browse/IMPALA-9631?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17091723#comment-17091723
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ASF subversion and git services commented on IMPALA-9631:
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Commit 9a3108709bf9cc11f00b97e966d1514bd59b34c8 in impala's branch
refs/heads/master from Gabor Kaszab
[ https://gitbox.apache.org/repos/asf?p=impala.git;h=9a31087 ]
IMPALA-9631: Import HLL functionality from DataSketches
This patch imports the functionality needed for HLL approximate
algorithm from Apache DataSketches. I decided to copy the necessary
files into be/src/thirdparty/datasketches. Note, that the original
structure of files was changed during this process as originally hll/
and common/ libraries were both affected but I copied these into the
same directory so that Impala can compile them without rewriting the
include paths in the files themselves. Also note, that not the whole
common/ directory was copied just the files needed for HLL.
The git hash of the snapshot I used as a source for the files:
a6265b307a03085abe26c20413fdbf7d7a5eaf29
Browse the source files here:
https://github.com/apache/incubator-datasketches-cpp
Change-Id: I8ca8e77dcbb6b6c3b1e3bca7ab57cb7d3c018bbf
Reviewed-on: http://gerrit.cloudera.org:8080/15746
Reviewed-by: Impala Public Jenkins <[email protected]>
Tested-by: Impala Public Jenkins <[email protected]>
> Import HLL functionality from DataSketches
> ------------------------------------------
>
> Key: IMPALA-9631
> URL: https://issues.apache.org/jira/browse/IMPALA-9631
> Project: IMPALA
> Issue Type: New Feature
> Components: Infrastructure
> Reporter: Gabor Kaszab
> Assignee: Gabor Kaszab
> Priority: Major
>
> 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.
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