[Feature] Add array function of array_flatten

[sfwang218]

Why I'm doing:

What I'm doing:

Fixes #19819

What type of PR is this:

• [ ] BugFix
• [x] Feature
• [ ] Enhancement
• [ ] Refactor
• [ ] UT
• [ ] Doc
• [ ] Tool

Does this PR entail a change in behavior?

• [ ] Yes, this PR will result in a change in behavior.
• [x] No, this PR will not result in a change in behavior.

If yes, please specify the type of change:

• [x] Interface/UI changes: syntax, type conversion, expression evaluation, display information
• [ ] Parameter changes: default values, similar parameters but with different default values
• [ ] Policy changes: use new policy to replace old one, functionality automatically enabled
• [ ] Feature removed
• [ ] Miscellaneous: upgrade & downgrade compatibility, etc.

Checklist:

• [x] I have added test cases for my bug fix or my new feature
• [x] This pr needs user documentation (for new or modified features or behaviors)
  • [x] I have added documentation for my new feature or new function
• [ ] This is a backport pr

Bugfix cherry-pick branch check:

• [ ] I have checked the version labels which the pr will be auto-backported to the target branch
  • [x] 3.3
  • [x] 3.2
  • [ ] 3.1
  • [ ] 3.0
  • [ ] 2.5

[github-actions[bot]]

[BE Incremental Coverage Report]

:white_check_mark: pass : 0 / 0 (0%)

[Seaven]

Could you add more sql test case about combination of array function, like: array_slice(array_flatten)... array_flatten(array_slice)...

[github-actions[bot]]

[FE Incremental Coverage Report]

:x: fail : 0 / 9 (00.00%)

file detail

	path	covered_line	new_line	coverage	not_covered_line_detail
:large_blue_circle:	com/starrocks/sql/analyzer/ExpressionAnalyzer.java	0	9	00.00%	[1496, 1497, 1499, 1500, 1501, 1502, 1504, 1505, 1506]

[sfwang218]

Could you add more sql test case about combination of array function, like: array_slice(array_flatten)... array_flatten(array_slice)...

I don't know how to add sql test, could you please provide me with some reference samples?

[sonarqubecloud[bot]]

Quality Gate passed

Issues
6 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[wangsimo0]

Could you add more sql test case about combination of array function, like: array_slice(array_flatten)... array_flatten(array_slice)...

I don't know how to add sql test, could you please provide me with some reference samples?

you can find SQL test sample in merged function pr like this one https://github.com/StarRocks/starrocks/pull/17905

[sfwang218]

Could you add more sql test case about combination of array function, like: array_slice(array_flatten)... array_flatten(array_slice)...

I don't know how to add sql test, could you please provide me with some reference samples?

you can find SQL test sample in merged function pr like this one #17905

Okay, I will take a look at it, thank you.

[sfwang218]

wangsimo0

Could you add more sql test case about combination of array function, like: array_slice(array_flatten)... array_flatten(array_slice)...

I don't know how to add sql test, could you please provide me with some reference samples?

you can find SQL test sample in merged function pr like this one #17905

Could you add more sql test case about combination of array function, like: array_slice(array_flatten)... array_flatten(array_slice)...

I don't know how to add sql test, could you please provide me with some reference samples?

you can find SQL test sample in merged function pr like this one #17905

Hello, I've just opened a new pull request #50080 , and I will close this one. Could you please review it when you have time? Thank you.