Fucun Chu created IMPALA-10558:
----------------------------------
Summary: 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
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:
```
select ds_theta_estimate(ds_theta_exclude(sketch1, sketch2)) from sketch_tbl;
+-------------------------------------------------------+
| ds_theta_estimate(ds_theta_exclude(sketch1, sketch2)) |
+-------------------------------------------------------+
| 5 |
+-------------------------------------------------------+
```
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