Retrieve value from DocValues in a flat_object filed

[kkewwei]

Description

Added ability to retrieve value from DocValues in a flat_object filed

Related Issues

Resolves #16742

Check List

• Functionality includes testing.
• API changes companion pull request created, if applicable.
• Public documentation issue/PR created, if applicable.

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[github-actions]

❌ Gradle check result for 31a060d: FAILURE

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

[github-actions]

❌ Gradle check result for 6054295: FAILURE

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

[github-actions]

❌ Gradle check result for 5f51b30: FAILURE

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

[msfroh]

@kkewwei -- I plan to review this PR this week. (Lots of meetings this week, but should have time Thursday or Friday.) Please @ me or bug me on OpenSearch Slack if I don't!

[kkewwei]

@kkewwei -- I plan to review this PR this week. (Lots of meetings this week, but should have time Thursday or Friday.) Please @ me or bug me on OpenSearch Slack if I don't!

Thank you very much, some of the unit tests are not ready, I will fix soon and at you when all is ready.

[github-actions]

❌ Gradle check result for 54cd837: FAILURE

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

[kkewwei]

❌ Gradle check result for 54cd837: FAILURE

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

SearchTimeoutIT.testSimpleTimeout #16056

[kkewwei]

@kkewwei -- I plan to review this PR this week. (Lots of meetings this week, but should have time Thursday or Friday.) Please @ me or bug me on OpenSearch Slack if I don't!

Thank you very much, some of the unit tests are not ready, I will fix soon and at you when all is ready.

TBR.

[github-actions]

❕ Gradle check result for a41d71e: UNSTABLE

Please review all flaky tests that succeeded after retry and create an issue if one does not already exist to track the flaky failure.

[codecov]

Codecov Report

Attention: Patch coverage is 56.00000% with 11 lines in your changes missing coverage. Please review.

Project coverage is 72.14%. Comparing base (5ba909a) to head (a41d71e).
Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
...opensearch/index/mapper/FlatObjectFieldMapper.java	54.54%	7 Missing and 3 partials ⚠️
...a/org/opensearch/index/mapper/DocValueFetcher.java	66.66%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #16802      +/-   ##
============================================
+ Coverage     72.11%   72.14%   +0.03%     
- Complexity    65237    65306      +69     
============================================
  Files          5318     5318              
  Lines        304003   304034      +31     
  Branches      43992    43998       +6     
============================================
+ Hits         219228   219346     +118     
+ Misses        66874    66751     -123     
- Partials      17901    17937      +36     

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[kkewwei]

❕ Gradle check result for a41d71e: UNSTABLE

Please review all flaky tests that succeeded after retry and create an issue if one does not already exist to track the flaky failure.

SearchRestCancellationIT.testAutomaticCancellationDuringFetchPhase #14311