Rui Wang created CALCITE-3743:
---------------------------------
Summary: Support PERCENT_RANK window aggregate function
Key: CALCITE-3743
URL: https://issues.apache.org/jira/browse/CALCITE-3743
Project: Calcite
Issue Type: Task
Reporter: Rui Wang
Assignee: Rui Wang
It seems like Calcite does not have an implementation of PERCENT_RANK: see the
list of implemented window aggregate function:
https://github.com/apache/calcite/blob/master/core/src/main/java/org/apache/calcite/adapter/enumerable/RexImpTable.java#L635
Did a quick check and MySQL, Postgresql, Oracle, BigQuery all support it. The
definition is consistent:
the function returns relative rank of the current row: (rank - 1) / (total
partition rows - 1)
The return value should be double.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
