Adding fast refresh setting during index creation

Author: toepkerd-zz

spark-sql-application/src/main/scala/org/apache/spark/sql/OSClient.scala

@@ -71,6 +71,15 @@ class OSClient(val flintOptions: FlintOptions) extends Logging {
     using(flintClient.createClient()) { client =>
       val request = new CreateIndexRequest(osIndexName)
       request.mapping(mapping, XContentType.JSON)
+        .settings(
+          """
+            | {
+            |   "auto_refresh": "true",
+            |   "refresh_interval": "1 Second",
+            | }
+            |""".stripMargin,
+          XContentType.JSON
+        )
 
       try {
         client.createIndex(request, RequestOptions.DEFAULT)