diff --git a/packaging/cfg/taos.cfg b/packaging/cfg/taos.cfg
index 310369aa14ad5e9e6ccb49843605a92fdc333563..f683de4fe5ee2c1422256b362899d18e36b81f40 100644
--- a/packaging/cfg/taos.cfg
+++ b/packaging/cfg/taos.cfg
@@ -141,6 +141,12 @@ keepColumnName            1
 # > 0 (rpc message body which larger than this value will be compressed)
 # compressMsgSize       -1
 
+# query retrieved column data compression option:
+#  -1 (no compression)
+#   0 (all retrieved column data compressed),
+# > 0 (any retrieved column size greater than this value all data will be compressed.)
+# compressColData       -1
+
 # max length of an SQL
 # maxSQLLength          65480
 
@@ -289,3 +295,6 @@ keepColumnName            1
 
 # percent of redundant data in tsdb meta will compact meta data,0 means donot compact
 # tsdbMetaCompactRatio    0
+
+# default string type used for storing JSON String, options can be binary/nchar, default is binary
+# defaultJSONStrType      binary