[HUDI-4763] Allow hoodie read client to choose index (apache#6506)

Co-authored-by: Y Ethan Guo <ethan.guoyihua@gmail.com>

Author: parisni

hudi-client/hudi-spark-client/src/main/java/org/apache/hudi/client/HoodieReadClient.java

@@ -92,6 +92,20 @@ public HoodieReadClient(HoodieSparkEngineContext context, String basePath, SQLCo
     this.sqlContextOpt = Option.of(sqlContext);
   }
 
+  /**
+   * Initializes the {@link HoodieReadClient} with engine context, base path, SQL context and index type.
+   *
+   * @param context    Hudi Spark engine context
+   * @param basePath   Base path of the table
+   * @param sqlContext {@link SQLContext} instance
+   * @param indexType  Hudi index type
+   */
+  public HoodieReadClient(HoodieSparkEngineContext context, String basePath, SQLContext sqlContext, HoodieIndex.IndexType indexType) {
+    this(context, HoodieWriteConfig.newBuilder().withPath(basePath)
+                       .withIndexConfig(HoodieIndexConfig.newBuilder().withIndexType(indexType).build()).build());
+    this.sqlContextOpt = Option.of(sqlContext);
+  }
+
   /**
    * @param clientConfig instance of HoodieWriteConfig
    */