beliefer opened a new pull request #35531:
URL: https://github.com/apache/spark/pull/35531


   ### What changes were proposed in this pull request?
   https://github.com/apache/spark/pull/34936 support ANSI Aggregation 
Function: `percentile_cont`.
   Some mainstream database supports `percentile_cont` as window function show 
below:
   
   **Snowflake**
   https://docs.snowflake.com/en/sql-reference/functions/percentile_cont.html
   **Oracle**
   
https://docs.oracle.com/en/database/oracle/oracle-database/19/sqlrf/PERCENTILE_CONT.html#GUID-CA259452-A565-41B3-A4F4-DD74B66CEDE0
   **H2**
   http://www.h2database.com/html/functions-aggregate.html#percentile_cont
   **Sybase**
   
https://infocenter.sybase.com/help/index.jsp?topic=/com.sybase.infocenter.dc01776.1601/doc/html/san1278453109663.html
   **Exasol**
   
https://docs.exasol.com/sql_references/functions/alphabeticallistfunctions/percentile_cont.htm
   **Yellowbrick**
   https://www.yellowbrick.com/docs/2.2/ybd_sqlref/percentile_cont_window.html
   **Mariadb**
   https://mariadb.com/kb/en/percentile_cont/
   **Singlestore**
   
https://docs.singlestore.com/db/v7.6/en/reference/sql-reference/window-functions/percentile_cont-and-median.html
   
   
   ### Why are the changes needed?
   Support ANSI aggregation function `percentile_cont` as window function
   
   
   ### Does this PR introduce _any_ user-facing change?
   'No'. New feature.
   
   
   ### How was this patch tested?
   New tests.
   


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