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https://issues.apache.org/jira/browse/SPARK-25843?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Reynold Xin updated SPARK-25843:
--------------------------------
Description:
See parent ticket for more information. Two proposals with sketches:
Proposal 1. create a version of rangeBetween that accepts Strings, i.e.
rangeBetween(String, String). This is obviously very flexible, but less type
safe.
Proposal 2. creates a new type called WindowFrameBoundary:
{code:java}
trait WindowFrameBoundary
object WindowFrameBoundary {
def unboundedPreceding: WindowFrameBoundary
def unboundedFollowing: WindowFrameBoundary
def currentRow: WindowFrameBoundary
def at(value: Long)
def interval(interval: String)
}{code}
And create a new rangeBetween that accepts WindowFrameBoundary's, i.e.
{code:java}
def rangeBetween(start: WindowFrameBoundary, end: WindowFrameBoundary) {code}
This is also very flexible and type safe at the same time.
Note the two are not mutually exclusive, and we can also deprecate the existing
confusing APIs.
was:
See parent ticket for more information. I have a rough design that I will post
later.
> Redesign rangeBetween API
> -------------------------
>
> Key: SPARK-25843
> URL: https://issues.apache.org/jira/browse/SPARK-25843
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 2.4.0
> Reporter: Reynold Xin
> Assignee: Reynold Xin
> Priority: Major
>
> See parent ticket for more information. Two proposals with sketches:
>
> Proposal 1. create a version of rangeBetween that accepts Strings, i.e.
> rangeBetween(String, String). This is obviously very flexible, but less type
> safe.
>
> Proposal 2. creates a new type called WindowFrameBoundary:
>
>
> {code:java}
> trait WindowFrameBoundary
>
> object WindowFrameBoundary {
> def unboundedPreceding: WindowFrameBoundary
> def unboundedFollowing: WindowFrameBoundary
> def currentRow: WindowFrameBoundary
> def at(value: Long)
> def interval(interval: String)
> }{code}
>
> And create a new rangeBetween that accepts WindowFrameBoundary's, i.e.
>
>
> {code:java}
> def rangeBetween(start: WindowFrameBoundary, end: WindowFrameBoundary) {code}
>
> This is also very flexible and type safe at the same time.
>
>
> Note the two are not mutually exclusive, and we can also deprecate the
> existing confusing APIs.
>
>
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