[SPARK-18299][SQL] Allow more aggregations on KeyValueGroupedDataset

[nooberfsh]

What changes were proposed in this pull request?

Add 4 additional agg to KeyValueGroupedDataset

How was this patch tested?

New test in DatasetSuite for typed aggregation

[JoshRosen]

jenkins this is ok to test

[SparkQA]

Test build #107041 has finished for PR 24993 at commit 9e1aacb.

• This patch fails Scala style tests.
• This patch merges cleanly.
• This patch adds no public classes.

[SparkQA]

Test build #107068 has finished for PR 24993 at commit e1a3442.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.

[SparkQA]

Test build #107319 has finished for PR 24993 at commit 1fbe526.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.

[SparkQA]

Test build #107320 has finished for PR 24993 at commit 3520138.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.

[dongjoon-hyun]

Retest this please.

[dongjoon-hyun]

Hi, @gatorsmile, @cloud-fan , @JoshRosen .
Since this is a very old issue, I'm wondering if this has not been considered in order to keep the API concise. Can we have this in Apache Spark 3.0.0?

[SparkQA]

Test build #107716 has finished for PR 24993 at commit 3520138.

• This patch fails due to an unknown error code, -9.
• This patch merges cleanly.
• This patch adds no public classes.

[dongjoon-hyun]

Retest this please.

[SparkQA]

Test build #107744 has finished for PR 24993 at commit 3520138.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.

[dongjoon-hyun]

+1, LGTM. Merged to master.

[dongjoon-hyun]

Thank you, @nooberfsh and @JoshRosen .

[dongjoon-hyun]

@nooberfsh . What is your Apache JIRA ID? I want to add you to the Apache Spark Contributor group and assign SPARK-18299 to you.

[zhouzach]

+1, LGTM. Merged to master.

but it can not be used in 2.4.3, is it not be published?

[dongjoon-hyun]

Correct, @zhouzach . SPARK-18299 is Apache Spark 3.0.0.

FYI, we don't backport New features are Improvements.