fix: SearchStats IndexUnusedReasons null bug

Author: farhan0102

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

@@ -54,7 +54,7 @@ public abstract static class Builder {
      *
      * @param tableReference tableReference or {@code null} for none
      */
-    public abstract Builder setBaseTable(TableReference tableReference);
+    public abstract Builder setBaseTable(TableId tableReference);
 
     /** Creates a @code IndexUnusedReason} object. */
     public abstract IndexUnusedReason build();
@@ -96,7 +96,7 @@ public static Builder newBuilder() {
    * @return value or {@code null} for none
    */
   @Nullable
-  public abstract TableReference getBaseTable();
+  public abstract TableId getBaseTable();
 
   com.google.api.services.bigquery.model.IndexUnusedReason toPb() {
     com.google.api.services.bigquery.model.IndexUnusedReason indexUnusedReason =
@@ -110,8 +110,9 @@ com.google.api.services.bigquery.model.IndexUnusedReason toPb() {
     if (getMessage() != null) {
       indexUnusedReason.setMessage(indexUnusedReason.getMessage());
     }
+    // From other examples i can see TableId.tbPb() for Base table in CloneDefinition
     if (getBaseTable() != null) {
-      indexUnusedReason.setBaseTable(indexUnusedReason.getBaseTable());
+      indexUnusedReason.setBaseTable(getBaseTable().toPb());
     }
     return indexUnusedReason;
   }
@@ -129,7 +130,7 @@ static IndexUnusedReason fromPb(
       builder.setMessage(indexUnusedReason.getMessage());
     }
     if (indexUnusedReason.getBaseTable() != null) {
-      builder.setBaseTable(indexUnusedReason.getBaseTable());
+      builder.setBaseTable(TableId.fromPb(indexUnusedReason.getBaseTable()));
     }
     return builder.build();
   }

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 +5109,11 @@ public void testQueryJobWithSearchReturnsSearchStatistics() throws InterruptedEx
       JobStatistics.QueryStatistics stats = remoteJob.getStatistics();
       assertNotNull(stats.getSearchStats());
       assertEquals(stats.getSearchStats().getIndexUsageMode(), "UNUSED");
+
+      System.out.println("Penguins");
+      System.out.println(stats.getSearchStats().getIndexUnusedReasons());
+      System.out.println("Horses");
+
     } finally {
       bigquery.delete(destinationTable);
     }