[SYSTEMDS-3467] Add support for MULTI_BLOCK Spark backend support for countDistinct() #1734
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… countDistinct()
This patch adds support for running MULTI_BLOCK aggregations for countDistinct() builtin on the Spark backend. The implementation augments the CountDistinctFunctionSketch with the union() function implementation.
Tests:
[X] Unit tests
[ ] Integration tests
[ ] N/A
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This patch adds support for running MULTI_BLOCK aggregations for countDistinct() builtin on the Spark backend. The implementation augments the CountDistinctFunctionSketch with the union() function implementation.
Tests:
[X] Unit tests
[ ] Integration tests
[ ] N/A