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https://issues.apache.org/jira/browse/SPARK-27980?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Yuming Wang updated SPARK-27980:
--------------------------------
Description:
||Function||Direct Argument Type(s)||Aggregated Argument Type(s)||Return
Type||Partial Mode||Description||
|{{mode() WITHIN GROUP (ORDER BY_{{sort_expression}}_)}}| |any sortable
type|same as sort expression|No|returns the most frequent input value
(arbitrarily choosing the first one if there are multiple equally-frequent
results)|
|{{percentile_cont(_{{fraction}}_) WITHIN GROUP (ORDER
BY_{{sort_expression}}_)}}|{{double precision}}|{{double precision}} or
{{interval}}|same as sort expression|No|continuous percentile: returns a value
corresponding to the specified fraction in the ordering, interpolating between
adjacent input items if needed|
|{{percentile_cont(_{{fractions}}_) WITHIN GROUP (ORDER
BY_{{sort_expression}}_)}}|{{double precision[]}}|{{double precision}} or
{{interval}}|array of sort expression's type|No|multiple continuous percentile:
returns an array of results matching the shape of the _{{fractions}}_
parameter, with each non-null element replaced by the value corresponding to
that percentile|
|{{percentile_disc(_{{fraction}}_) WITHIN GROUP (ORDER
BY_{{sort_expression}}_)}}|{{double precision}}|any sortable type|same as sort
expression|No|discrete percentile: returns the first input value whose position
in the ordering equals or exceeds the specified fraction|
|{{percentile_disc(_{{fractions}}_) WITHIN GROUP (ORDER
BY_{{sort_expression}}_)}}|{{double precision[]}}|any sortable type|array of
sort expression's type|No|multiple discrete percentile: returns an array of
results matching the shape of the _{{fractions}}_ parameter, with each non-null
element replaced by the input value corresponding to that percentile|
https://www.postgresql.org/docs/11/functions-aggregate.html#FUNCTIONS-ORDEREDSET-TABLE
was:
||Function||Direct Argument Type(s)||Aggregated Argument Type(s)||Return
Type||Partial Mode||Description||
|{{percentile_cont(_{{fraction}}_) WITHIN GROUP (ORDER BY
_{{sort_expression}}_)}}|{{double precision}}|{{double precision}} or
{{interval}}|same as sort expression|No|continuous percentile: returns a value
corresponding to the specified fraction in the ordering, interpolating between
adjacent input items if needed|
|{{percentile_cont(_{{fractions}}_) WITHIN GROUP (ORDER
BY_{{sort_expression}}_)}}|{{double precision[]}}|{{double precision}} or
{{interval}}|array of sort expression's type|No|multiple continuous percentile:
returns an array of results matching the shape of the _{{fractions}}_
parameter, with each non-null element replaced by the value corresponding to
that percentile|
Currently, the following DBMSs support the syntax:
https://www.postgresql.org/docs/current/functions-aggregate.html
https://docs.aws.amazon.com/redshift/latest/dg/r_PERCENTILE_CONT.html
https://docs.teradata.com/reader/756LNiPSFdY~4JcCCcR5Cw/RgAqeSpr93jpuGAvDTud3w
https://www.vertica.com/docs/9.2.x/HTML/Content/Authoring/SQLReferenceManual/Functions/Analytic/PERCENTILE_CONTAnalytic.htm?tocpath=SQL%20Reference%20Manual%7CSQL%20Functions%7CAnalytic%20Functions%7C_____25
> Ordered-Set Aggregate Functions
> -------------------------------
>
> Key: SPARK-27980
> URL: https://issues.apache.org/jira/browse/SPARK-27980
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: Yuming Wang
> Priority: Major
>
> ||Function||Direct Argument Type(s)||Aggregated Argument Type(s)||Return
> Type||Partial Mode||Description||
> |{{mode() WITHIN GROUP (ORDER BY_{{sort_expression}}_)}}| |any sortable
> type|same as sort expression|No|returns the most frequent input value
> (arbitrarily choosing the first one if there are multiple equally-frequent
> results)|
> |{{percentile_cont(_{{fraction}}_) WITHIN GROUP (ORDER
> BY_{{sort_expression}}_)}}|{{double precision}}|{{double precision}} or
> {{interval}}|same as sort expression|No|continuous percentile: returns a
> value corresponding to the specified fraction in the ordering, interpolating
> between adjacent input items if needed|
> |{{percentile_cont(_{{fractions}}_) WITHIN GROUP (ORDER
> BY_{{sort_expression}}_)}}|{{double precision[]}}|{{double precision}} or
> {{interval}}|array of sort expression's type|No|multiple continuous
> percentile: returns an array of results matching the shape of the
> _{{fractions}}_ parameter, with each non-null element replaced by the value
> corresponding to that percentile|
> |{{percentile_disc(_{{fraction}}_) WITHIN GROUP (ORDER
> BY_{{sort_expression}}_)}}|{{double precision}}|any sortable type|same as
> sort expression|No|discrete percentile: returns the first input value whose
> position in the ordering equals or exceeds the specified fraction|
> |{{percentile_disc(_{{fractions}}_) WITHIN GROUP (ORDER
> BY_{{sort_expression}}_)}}|{{double precision[]}}|any sortable type|array of
> sort expression's type|No|multiple discrete percentile: returns an array of
> results matching the shape of the _{{fractions}}_ parameter, with each
> non-null element replaced by the input value corresponding to that percentile|
> https://www.postgresql.org/docs/11/functions-aggregate.html#FUNCTIONS-ORDEREDSET-TABLE
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