diff --git a/legacy/src/main/java/com/amazon/opendistroforelasticsearch/sql/legacy/plugin/RestSQLQueryAction.java b/legacy/src/main/java/com/amazon/opendistroforelasticsearch/sql/legacy/plugin/RestSQLQueryAction.java
index 565fb69638..c60111f3fe 100644
--- a/legacy/src/main/java/com/amazon/opendistroforelasticsearch/sql/legacy/plugin/RestSQLQueryAction.java
+++ b/legacy/src/main/java/com/amazon/opendistroforelasticsearch/sql/legacy/plugin/RestSQLQueryAction.java
@@ -106,6 +106,10 @@ public RestChannelConsumer prepareRequest(SQLQueryRequest request, NodeClient no
                 sqlService.analyze(
                     sqlService.parse(request.getQuery())));
     } catch (SyntaxCheckException e) {
+      // When explain, print info log for what unsupported syntax is causing fallback to old engine
+      if (request.isExplainRequest()) {
+        LOG.info("Request is falling back to old SQL engine due to: " + e.getMessage());
+      }
       return NOT_SUPPORTED_YET;
     }
 
diff --git a/legacy/src/main/java/com/amazon/opendistroforelasticsearch/sql/legacy/plugin/RestSqlAction.java b/legacy/src/main/java/com/amazon/opendistroforelasticsearch/sql/legacy/plugin/RestSqlAction.java
index 444f6e4aed..da8b064469 100644
--- a/legacy/src/main/java/com/amazon/opendistroforelasticsearch/sql/legacy/plugin/RestSqlAction.java
+++ b/legacy/src/main/java/com/amazon/opendistroforelasticsearch/sql/legacy/plugin/RestSqlAction.java
@@ -156,8 +156,7 @@ protected RestChannelConsumer prepareRequest(RestRequest request, NodeClient cli
                                                                     format.getFormatName());
                 RestChannelConsumer result = newSqlQueryHandler.prepareRequest(newSqlRequest, client);
                 if (result != RestSQLQueryAction.NOT_SUPPORTED_YET) {
-                    LOG.info("[{}] Request {} is handled by new SQL query engine",
-                        LogUtils.getRequestId(), newSqlRequest);
+                    LOG.info("[{}] Request is handled by new SQL query engine", LogUtils.getRequestId());
                     return result;
                 }
                 LOG.debug("[{}] Request {} is not supported and falling back to old SQL engine",