Complete keyword changes for star tree

[bharath-techie]

Description

This PR adds support for keyword fields with changes end to end that includes flush, merge and file format changes.

As part of "ordered_dimensions" as part of star tree mapping , users can provide keyword fields as well now. [ Metrics are not supported for keyword, its still "numeric-only" supported for star tree]

Related Issues

Resolves #16232

Check List

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

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[github-actions]

❌ Gradle check result for bbb9ed0: 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 57b0517: 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 a48de57: 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 9238f17: SUCCESS

[codecov]

Codecov Report

Attention: Patch coverage is 83.83459% with 43 lines in your changes missing coverage. Please review.

Project coverage is 72.08%. Comparing base (10873f1) to head (5c4a0e5).
Report is 30 commits behind head on main.

Files with missing lines	Patch %	Lines
...be/startree/utils/SequentialDocValuesIterator.java	52.94%	3 Missing and 5 partials ⚠️
...ndex/compositeindex/datacube/DimensionFactory.java	33.33%	4 Missing and 2 partials ⚠️
...be/startree/fileformats/meta/StarTreeMetadata.java	57.14%	5 Missing and 1 partial ⚠️
...rtree/fileformats/meta/StarTreeMetadataWriter.java	45.45%	5 Missing and 1 partial ⚠️
...ndex/compositeindex/datacube/KeywordDimension.java	73.68%	5 Missing ⚠️
...datacube/startree/builder/BaseStarTreeBuilder.java	94.73%	2 Missing and 3 partials ⚠️
...eindex/datacube/startree/index/StarTreeValues.java	81.25%	0 Missing and 3 partials ⚠️
...tils/iterator/SortedSetStarTreeValuesIterator.java	66.66%	3 Missing ⚠️
...site/composite912/Composite912DocValuesWriter.java	95.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #16233      +/-   ##
============================================
- Coverage     72.15%   72.08%   -0.07%     
- Complexity    65145    65175      +30     
============================================
  Files          5315     5318       +3     
  Lines        303573   303781     +208     
  Branches      43925    43951      +26     
============================================
- Hits         219039   218991      -48     
- Misses        66587    66854     +267     
+ Partials      17947    17936      -11     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

---

🚨 Try these New Features:

• Flaky Tests Detection - Detect and resolve failed and flaky tests

[github-actions]

❌ Gradle check result for e37485a: 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 6688d4b: 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 0af594b: 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 0af594b: 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.

[github-actions]

❕ Gradle check result for 5c4a0e5: 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.

[opensearch-trigger-bot]

The backport to 2.x failed:

The process '/usr/bin/git' failed with exit code 128

To backport manually, run these commands in your terminal:

# Navigate to the root of your repository
cd $(git rev-parse --show-toplevel)
# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add ../.worktrees/OpenSearch/backport-2.x 2.x
# Navigate to the new working tree
pushd ../.worktrees/OpenSearch/backport-2.x
# Create a new branch
git switch --create backport/backport-16233-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 7f27ddca1c3dc9f4ff6fa4216c7f28171cec3db9
# Push it to GitHub
git push --set-upstream origin backport/backport-16233-to-2.x
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/OpenSearch/backport-2.x

Then, create a pull request where the base branch is 2.x and the compare/head branch is backport/backport-16233-to-2.x.

[opensearch-trigger-bot]

The backport to 2.x failed:

The process '/usr/bin/git' failed with exit code 128

To backport manually, run these commands in your terminal:

# Navigate to the root of your repository
cd $(git rev-parse --show-toplevel)
# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add ../.worktrees/OpenSearch/backport-2.x 2.x
# Navigate to the new working tree
pushd ../.worktrees/OpenSearch/backport-2.x
# Create a new branch
git switch --create backport/backport-16233-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 7f27ddca1c3dc9f4ff6fa4216c7f28171cec3db9
# Push it to GitHub
git push --set-upstream origin backport/backport-16233-to-2.x
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/OpenSearch/backport-2.x

Then, create a pull request where the base branch is 2.x and the compare/head branch is backport/backport-16233-to-2.x.