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https://issues.apache.org/jira/browse/IMPALA-10558?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17304261#comment-17304261
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ASF subversion and git services commented on IMPALA-10558:
----------------------------------------------------------
Commit 3e8250153108954870409fa27e35b33d608c5cb7 in impala's branch
refs/heads/master from Fucun Chu
[ https://gitbox.apache.org/repos/asf?p=impala.git;h=3e82501 ]
IMPALA-10558: Implement ds_theta_exclude() function
This function receives two strings that are serialized Apache
DataSketches Theta sketches. Computes the a-not-b set operation given
two sketches of same or different column.
Example:
select ds_theta_estimate(ds_theta_exclude(sketch1, sketch2))
from sketch_tbl;
+-------------------------------------------------------+
| ds_theta_estimate(ds_theta_exclude(sketch1, sketch2)) |
+-------------------------------------------------------+
| 5 |
+-------------------------------------------------------+
Change-Id: I05119fd8c652c07ff248a99e44b0da3541e46ca3
Reviewed-on: http://gerrit.cloudera.org:8080/17153
Reviewed-by: Gabor Kaszab <[email protected]>
Tested-by: Impala Public Jenkins <[email protected]>
> Implement ds_theta_exclude() function.
> --------------------------------------
>
> Key: IMPALA-10558
> URL: https://issues.apache.org/jira/browse/IMPALA-10558
> Project: IMPALA
> Issue Type: New Feature
> Components: Backend, Frontend
> Reporter: Fucun Chu
> Assignee: Fucun Chu
> Priority: Major
> Fix For: Impala 4.0
>
>
> This function receives two strings that are serialized Apache DataSketches
> Theta sketches. Computes the a-not-b set operation given two sketches of same
> or different column.
> Example:
> {code:sql}
> select ds_theta_estimate(ds_theta_exclude(sketch1, sketch2)) from sketch_tbl;
> +-------------------------------------------------------+
> | ds_theta_estimate(ds_theta_exclude(sketch1, sketch2)) |
> +-------------------------------------------------------+
> | 5 |
> +-------------------------------------------------------+
> {code}
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