cloud-fan commented on a change in pull request #30144:
URL: https://github.com/apache/spark/pull/30144#discussion_r609768175
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File path: docs/sql-ref-syntax-qry-select-groupby.md
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@@ -88,6 +89,41 @@ aggregate_name ( [ DISTINCT ] expression [ , ... ] ) [
FILTER ( WHERE boolean_ex
(product, warehouse, location), (warehouse), (product), (warehouse,
product), ())`.
The N elements of a `CUBE` specification results in 2^N `GROUPING SETS`.
+* **Partial Grouping Analytics**
+
+ Partial grouping analytics means there are both `group_expression` and
`CUBE|ROLLUP|GROUPING SETS`
+ in GROUP BY clause. For example:
Review comment:
We can say that: `group_expression`s will be prepended to each group in
the GROUPING SETS.
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