Fucun Chu created IMPALA-10580:
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Summary: Implement ds_theta_union_f() function.
Key: IMPALA-10580
URL: https://issues.apache.org/jira/browse/IMPALA-10580
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. Union two sketches and returns the resulting sketch of union.
Example:
{code:java}
select ds_theta_estimate(ds_theta_union_f(sketch1, sketch2))
from sketch_tbl;
+-------------------------------------------------------+
| ds_theta_estimate(ds_theta_exclude(sketch1, sketch2)) |
+-------------------------------------------------------+
| 5 |
+-------------------------------------------------------+{code}
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