diff --git a/sdk/src/main/java/com/qiniu/pandora/logdb/search/SearchService.java b/sdk/src/main/java/com/qiniu/pandora/logdb/search/SearchService.java
index 508ce0f..86ff383 100644
--- a/sdk/src/main/java/com/qiniu/pandora/logdb/search/SearchService.java
+++ b/sdk/src/main/java/com/qiniu/pandora/logdb/search/SearchService.java
@@ -66,6 +66,9 @@ public static class SearchRequest {
         public long startTime;
         @SerializedName("end_time")
         public long endTime;
+        @SerializedName("default_operator")
+        public String defaultOperator;
+
         public class Highlight {
             @SerializedName("pre_tags")
             public ArrayList<String> preTags;