Add additional linear regression functions

[8dukongjian]

Description

Fix #21328
Add additional linear regression functions, include:

• REGR_AVGX
• REGR_AVGY
• REGR_COUNT
• REGR_R2
• REGR_SXX
• REGR_SXY
• REGR_SYY

Release Notes

Please follow release notes guidelines and fill in the release notes below.

== RELEASE NOTES ==

General Changes
* Add REGR_AVGX, REGR_AVGY, REGR_COUNT, REGR_R2, REGR_SXX, REGR_SXY, and REGR_SYY.

[steveburnett]

Two things I wanted to mention:

• Please update this PR with a release note entry following the Release Notes Guidelines.

• Functions in Presto should be documented following the Review and Commit Guidelines.

[tdcmeehan]

It might be worthwhile to add a couple light utilities to reduce the duplication among the aggregation tests. Otherwise code LGTM>

[tdcmeehan]

These methods all look nearly identical, can you create a utility method to consolidate?

[8dukongjian]

Thanks, updated. Some methods have been put into the abstract class.

[github-actions]

Codenotify: Notifying subscribers in CODENOTIFY files for diff e01dc52...bf2d675.

Notify	File(s)
@steveburnett	presto-docs/src/main/sphinx/functions/aggregate.rst

[8dukongjian]

@steveburnett Thanks.

1. Updated the release note in this PR.
2. In presto-docs/src/main/sphinx/functions/aggregate.rst, the introduction to the function is added.

[steveburnett]

Thanks for adding all the functions into the doc! I only had a formatting nit that I noticed when I did a local build of the documentation: the new entries need a line added between the function and the definition. Here's a screenshot of what the doc build looks like:

[steveburnett]

Suggested change

	.. function:: regr_avgx(y, x) -> double
	.. function:: regr_avgx(y, x) -> double

[steveburnett]

Suggested change

	.. function:: regr_avgy(y, x) -> double
	.. function:: regr_avgy(y, x) -> double

[steveburnett]

Suggested change

	.. function:: regr_count(y, x) -> double
	.. function:: regr_count(y, x) -> double

[steveburnett]

Suggested change

	.. function:: regr_r2(y, x) -> double
	.. function:: regr_r2(y, x) -> double

[steveburnett]

Suggested change

	.. function:: regr_sxy(y, x) -> double
	.. function:: regr_sxy(y, x) -> double

[steveburnett]

Suggested change

	.. function:: regr_syy(y, x) -> double
	.. function:: regr_syy(y, x) -> double

[steveburnett]

Suggested change

	.. function:: regr_sxx(y, x) -> double
	.. function:: regr_sxx(y, x) -> double

[8dukongjian]

Thanks, Updated. Here's the new screenshot of what the doc build looks like:

[steveburnett]

Thanks, Updated. Here's the new screenshot of what the doc build looks like:

Thanks! I just now did a new pull and local build of the doc and everything looks good! Updating my review to Approve for the docs.

[steveburnett]

LGTM! (docs)

New pull of branch and new local build of docs, everything looks good. Thanks!

[tdcmeehan]

LGTM. Please squash commits and I can help merge. Thank you!

[8dukongjian]

@tdcmeehan Thanks, done.

[tdcmeehan]

Changes look good, but please make sure the commit follows our guidelines.. Consider Add additional linear regression functions as a title and list out the functions in the body.

[8dukongjian]

@tdcmeehan Updated the title and description.

[tdcmeehan]

Thanks @8dukongjian, but I meant the commit message--the message in Git history. The link above describes this.

[8dukongjian]

@tdcmeehan Thanks, done.