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Tanner Clary commented on CALCITE-5564: --------------------------------------- [~julianhyde] Description should be updated now. > Support 2-argument PERCENTILE_CONT, PERCENTILE_DISC aggregate functions (as > in BigQuery) > ---------------------------------------------------------------------------------------- > > Key: CALCITE-5564 > URL: https://issues.apache.org/jira/browse/CALCITE-5564 > Project: Calcite > Issue Type: Improvement > Reporter: Tanner Clary > Assignee: Tanner Clary > Priority: Major > > Calcite currently has implementations for the {{PERCENTILE_CONT}} and > {{PERCENTILE_DISC}} functions. Their syntax may be found > [here|https://learn.microsoft.com/en-us/sql/t-sql/functions/percentile-cont-transact-sql?view=sql-server-ver16]. > > BigQuery offers these functions as well, but the syntax is slightly > different, and may be found > [here|https://cloud.google.com/bigquery/docs/reference/standard-sql/functions-and-operators#percentile_cont]. > The main difference is that instead of using a {{WITHIN GROUP}} clause, the > array is passed in directly as the first argument to the function. > BigQuery Syntax Example: {{SELECT PERCENTILE_CONT(x, .5) OVER() FROM > UNNEST([1,2,3,4]) as x;}} would return the median, 2.5. > Standard Syntax Example: {{SELECT PERCENTILE_CONT(.5) WITHIN GROUP (ORDER BY > [some column])}} > Parsing and validation for the standard functions was added in CALCITE-4644. > The actual implementation for both the standard and BigQuery forms is covered > under CALCITE-4666. -- This message was sent by Atlassian Jira (v8.20.10#820010)