[Backport 2.x] FIX: UOE While building Exists query for nested search_as_you_type field

[msfroh]

The "exists" query on an object field would fail when a "search_as_you_type" field is nested under that object.

It would also fail for a text field with prefixes enabled nested under the object, or any other field with a "hidden" subfield.

---

Signed-off-by: Mrudhul Guda [email protected]
(cherry picked from commit 37569ba)

Manual backport of #12048

Related Issues

Resolves #11821

Check List

• New functionality includes testing.
  • All tests pass
• New functionality has been documented.
  • New functionality has javadoc added
• Failing checks are inspected and point to the corresponding known issue(s) (See: Troubleshooting Failing Builds)
• Commits are signed per the DCO using --signoff
• Commit changes are listed out in CHANGELOG.md file (See: Changelog)
• Public documentation issue/PR created

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[github-actions]

Compatibility status:

Checks if related components are compatible with change 80f59e7

Incompatible components

Skipped components

Compatible components

Compatible components: [https://github.com/opensearch-project/custom-codecs.git, https://github.com/opensearch-project/asynchronous-search.git, https://github.com/opensearch-project/anomaly-detection.git, https://github.com/opensearch-project/flow-framework.git, https://github.com/opensearch-project/cross-cluster-replication.git, https://github.com/opensearch-project/reporting.git, https://github.com/opensearch-project/job-scheduler.git, https://github.com/opensearch-project/common-utils.git, https://github.com/opensearch-project/geospatial.git, https://github.com/opensearch-project/neural-search.git, https://github.com/opensearch-project/alerting.git, https://github.com/opensearch-project/k-nn.git, https://github.com/opensearch-project/security-analytics.git, https://github.com/opensearch-project/performance-analyzer-rca.git, https://github.com/opensearch-project/notifications.git, https://github.com/opensearch-project/observability.git, https://github.com/opensearch-project/security.git, https://github.com/opensearch-project/ml-commons.git, https://github.com/opensearch-project/index-management.git, https://github.com/opensearch-project/performance-analyzer.git, https://github.com/opensearch-project/sql.git]

[github-actions]

❕ Gradle check result for 1dec5ce: UNSTABLE

• TEST FAILURES:

      1 org.opensearch.cluster.coordination.AwarenessAttributeDecommissionIT.testConcurrentDecommissionAction

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 66.66667% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 71.07%. Comparing base (0dd892c) to head (80f59e7).
Report is 161 commits behind head on 2.x.

❗ Current head 80f59e7 differs from pull request most recent head d4a088c. Consider uploading reports for the commit d4a088c to get more accurate results

Files	Patch %	Lines
...org/opensearch/index/query/ExistsQueryBuilder.java	66.66%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##                2.x   #13006      +/-   ##
============================================
- Coverage     71.28%   71.07%   -0.21%     
- Complexity    60145    60560     +415     
============================================
  Files          4957     5003      +46     
  Lines        282799   285267    +2468     
  Branches      41409    41709     +300     
============================================
+ Hits         201591   202755    +1164     
- Misses        64189    65406    +1217     
- Partials      17019    17106      +87     

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[github-actions]

❌ Gradle check result for 80f59e7: TIMEOUT

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 80f59e7: SUCCESS

[github-actions]

✅ Gradle check result for d4a088c: SUCCESS