fix: SearchStats IndexUnusedReasons null bug (#2825)

* fix: SearchStats IndexUnusedReasons null bug

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

---------

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: farhan0102

README.md

@@ -53,20 +53,20 @@ If you are using Maven without the BOM, add this to your dependencies:
 If you are using Gradle 5.x or later, add this to your dependencies:
 
 ```Groovy
-implementation platform('com.google.cloud:libraries-bom:26.21.0')
+implementation platform('com.google.cloud:libraries-bom:26.22.0')
 
 implementation 'com.google.cloud:google-cloud-bigquery'
 ```
 If you are using Gradle without BOM, add this to your dependencies:
 
 ```Groovy
-implementation 'com.google.cloud:google-cloud-bigquery:2.31.0'
+implementation 'com.google.cloud:google-cloud-bigquery:2.31.1'
 ```
 
 If you are using SBT, add this to your dependencies:
 
 ```Scala
-libraryDependencies += "com.google.cloud" % "google-cloud-bigquery" % "2.31.0"
+libraryDependencies += "com.google.cloud" % "google-cloud-bigquery" % "2.31.1"
 ```
 <!-- {x-version-update-end} -->
 
@@ -351,7 +351,7 @@ Java is a registered trademark of Oracle and/or its affiliates.
 [kokoro-badge-link-5]: http://storage.googleapis.com/cloud-devrel-public/java/badges/java-bigquery/java11.html
 [stability-image]: https://img.shields.io/badge/stability-stable-green
 [maven-version-image]: https://img.shields.io/maven-central/v/com.google.cloud/google-cloud-bigquery.svg
-[maven-version-link]: https://central.sonatype.com/artifact/com.google.cloud/google-cloud-bigquery/2.31.0
+[maven-version-link]: https://central.sonatype.com/artifact/com.google.cloud/google-cloud-bigquery/2.31.1
 [authentication]: https://github.com/googleapis/google-cloud-java#authentication
 [auth-scopes]: https://developers.google.com/identity/protocols/oauth2/scopes
 [predefined-iam-roles]: https://cloud.google.com/iam/docs/understanding-roles#predefined_roles

google-cloud-bigquery/src/main/java/com/google/cloud/bigquery/SearchStats.java

@@ -68,7 +68,7 @@ SearchStatistics toPb() {
       searchStatistics.setIndexUsageMode(getIndexUsageMode());
     }
     if (getIndexUnusedReasons() != null) {
-      searchStatistics.setIndexUnusedReason(
+      searchStatistics.setIndexUnusedReasons(
           getIndexUnusedReasons().stream()
               .map(IndexUnusedReason::toPb)
               .collect(Collectors.toList()));
@@ -81,9 +81,9 @@ static SearchStats fromPb(SearchStatistics searchStatistics) {
     if (searchStatistics.getIndexUsageMode() != null) {
       builder.setIndexUsageMode(searchStatistics.getIndexUsageMode());
     }
-    if (searchStatistics.getIndexUnusedReason() != null) {
+    if (searchStatistics.getIndexUnusedReasons() != null) {
       builder.setIndexUnusedReasons(
-          searchStatistics.getIndexUnusedReason().stream()
+          searchStatistics.getIndexUnusedReasons().stream()
               .map(IndexUnusedReason::fromPb)
               .collect(Collectors.toList()));
     }

google-cloud-bigquery/src/test/java/com/google/cloud/bigquery/it/ITBigQueryTest.java

@@ -5090,7 +5090,7 @@ public void testQueryJobWithLabels() throws InterruptedException, TimeoutExcepti
   }
 
   @Test
-  public void testQueryJobWithSearchReturnsSearchStatistics() throws InterruptedException {
+  public void testQueryJobWithSearchReturnsSearchStatisticsUnused() throws InterruptedException {
     String tableName = "test_query_job_table";
     String query =
         "SELECT * FROM "
@@ -5109,6 +5109,10 @@ public void testQueryJobWithSearchReturnsSearchStatistics() throws InterruptedEx
       JobStatistics.QueryStatistics stats = remoteJob.getStatistics();
       assertNotNull(stats.getSearchStats());
       assertEquals(stats.getSearchStats().getIndexUsageMode(), "UNUSED");
+      assertNotNull(stats.getSearchStats().getIndexUnusedReasons());
+      assertNotNull(
+          stats.getSearchStats().getIndexUnusedReasons().get(0).getCode(),
+          "INDEX_CONFIG_NOT_AVAILABLE");
     } finally {
       bigquery.delete(destinationTable);
     }

pom.xml

@@ -54,7 +54,7 @@
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
     <github.global.server>github</github.global.server>
     <site.installationModule>google-cloud-bigquery-parent</site.installationModule>
-    <google-api-services-bigquery.version>v2-rev20230520-2.0.0</google-api-services-bigquery.version>
+    <google-api-services-bigquery.version>v2-rev20230805-2.0.0</google-api-services-bigquery.version>
     <google.cloud.shared-dependencies.version>3.14.0</google.cloud.shared-dependencies.version>
     <arrow.version>12.0.1</arrow.version>
   </properties>