tidy up CI case for link function

[DuanKuanJun]

Description

Please briefly describe the code changes in this pull request.

Checklist

Please check the items in the checklist if applicable.

• Is the user manual updated?
• Are the test cases passed and automated?
• Is there no significant decrease in test coverage?

[gemini-code-assist]

Summary of Changes

Hello @DuanKuanJun, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request focuses on a comprehensive cleanup and reorganization of CI test cases, particularly those related to functions. It introduces a new mechanism for parsing docstring labels to control test execution, standardizes docstring formats across a wide range of function tests, and restructures test file paths for better organization. Additionally, new dedicated test cases have been added for several scalar functions, enhancing test coverage and clarity.

Highlights

• Test Case Reorganization: Numerous test files under 'test/cases/10-DataIngestion/' have been moved into a new '01-SQL' subdirectory, indicating a restructuring of data ingestion test cases.
• Docstring Standardization: Docstrings across many test files, especially for scalar, aggregate, and timeseries functions, have been updated to follow a consistent 'Fun: FunctionName()' format. This includes updates for functions like ABS(), ACOS(), AVG(), COUNT(), ELAPSED(), HISTOGRAM(), HYPERLOGLOG(), LEASTSQUARES(), PERCENTILE(), SPREAD(), STDDEV(), SUM(), BOTTOM(), COLS(), FIRST(), LAST(), LAST_ROW(), MAX(), MIN(), MODE(), TAIL(), TOP(), UNIQUE(), CSUM(), DIFF(), INTERP(), IRATE(), MAVG(), SAMPLE(), STATECOUNT(), STATEDURATION(), and TWA().
• New Test Case Definitions: The 'test_scalar_all.py' file has been refactored to introduce dedicated test methods for various scalar functions (e.g., Degrees, Exp, Greatest, Least, Ln, Mod, Pi, Radians, Rand, Sign, Truncate, Crc32, Base64, Ascii, Char, Char_length), each with comprehensive docstrings detailing their test coverage. A new test for the 'Corr()' function was also added in 'test_tdgpt.py', and a 'Find_in_set()' test in 'test_scalar_string.py'.
• New Derivative Function Test: A new test file 'test_fun_ts_derivative.py' has been added to cover the 'Derivative()' timeseries function, including various test scenarios and data types.
• CI Script Enhancement: The 'generate_case_md.py' script now includes logic to parse 'Labels' from docstrings and can conditionally skip processing test cases marked with an 'ignore' label, providing more granular control over CI execution.
• Test Resource Cleanup: Numerous test resource files ('.csv', '.err', '.in') previously located under 'test/cases/uncatalog/army/query/function/' have been removed, with some being relocated and renamed to 'test/cases/22-Functions/resource/', streamlining the test asset management.

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[gemini-code-assist]

Code Review

This pull request tidies up test cases, primarily for CI and documentation generation. It introduces a script to handle special 'ignore' labels in docstrings, reorganizes many test files, and refactors a large test function into smaller methods. My review focuses on a bug in the markdown generation script, an incomplete refactoring, an empty placeholder test, and several areas for improvement in a new test file, including a bug in test assertions and some style issues. While the reorganization is a positive step, some parts require further attention to ensure correctness and maintainability.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 50.22%. Comparing base (3d38933) to head (b32e3a3).
⚠️ Report is 35 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #33253      +/-   ##
==========================================
- Coverage   54.05%   50.22%   -3.84%     
==========================================
  Files         472      437      -35     
  Lines      294900   268959   -25941     
  Branches    99139    94802    -4337     
==========================================
- Hits       159397   135073   -24324     
- Misses      83784    84764     +980     
+ Partials    51719    49122    -2597     

Flag	Coverage Δ
TDengine	50.22% <ø> (-3.83%)	⬇️

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[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
1 out of 2 committers have signed the CLA.

✅ DuanKuanJun
❌ minhuinie
_{You have signed the CLA already but the status is still pending? Let us recheck it.}