private Index createHashIndex(String regionName, String fieldName)
        throws RegionNotFoundException, IndexExistsException, IndexNameConflictException {
      String fromClause = SEPARATOR + regionName + " r";
      String indexedExpression = "r." + fieldName;
      return qs.createHashIndex("Hash " + fromClause + ":" + indexedExpression, indexedExpression,
          fromClause);
    }
We do not want to test this with Primary Key on the many side or else only 1 result will be
returned
geode-core/src/integrationTest/java/org/apache/geode/cache/query/internal/index/EquiJoinIntegrationTest.java