Implement percent_rank() on GPU (#4924)

* Implement percent_rank using cuDF but without window optimization used by rank and dense_rank Signed-off-by: Navin Kumar <navink@nvidia.com> * Cleanup Signed-off-by: Navin Kumar <navink@nvidia.com> * fixes: remove redundant tests, and fix comments Signed-off-by: Navin Kumar <navink@nvidia.com>
NVIDIA · Mar 11, 2022 · 41bcaf6 · 41bcaf6
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diff --git a/docs/configs.md b/docs/configs.md
@@ -253,6 +253,7 @@ Name | SQL Function(s) | Description | Default Value | Notes
 <a name="sql.expression.Not"></a>spark.rapids.sql.expression.Not|`!`, `not`|Boolean not operator|true|None|
 <a name="sql.expression.OctetLength"></a>spark.rapids.sql.expression.OctetLength|`octet_length`|The byte length of string data|true|None|
 <a name="sql.expression.Or"></a>spark.rapids.sql.expression.Or|`or`|Logical OR|true|None|
+<a name="sql.expression.PercentRank"></a>spark.rapids.sql.expression.PercentRank|`percent_rank`|Window function that returns the percent rank value within the aggregation window|true|None|
 <a name="sql.expression.Pmod"></a>spark.rapids.sql.expression.Pmod|`pmod`|Pmod|true|None|
 <a name="sql.expression.PosExplode"></a>spark.rapids.sql.expression.PosExplode|`posexplode_outer`, `posexplode`|Given an input array produces a sequence of rows for each value in the array|true|None|
 <a name="sql.expression.Pow"></a>spark.rapids.sql.expression.Pow|`pow`, `power`|lhs ^ rhs|true|None|