diff --git a/src/kit/taosdemo/taosdemo.c b/src/kit/taosdemo/taosdemo.c
index 9ae70b384bcd98b3bbbb4cd65b6152c72b9c3cb1..87102cc1c76206a0c6f779efc9ef22e9607409ef 100644
--- a/src/kit/taosdemo/taosdemo.c
+++ b/src/kit/taosdemo/taosdemo.c
@@ -105,7 +105,7 @@ extern char configDir[];
 
 #define DEFAULT_TIMESTAMP_STEP  1
 #define DEFAULT_INTERLACE_ROWS  0
-#define DEFAULT_DATATYPE_NUM    3
+#define DEFAULT_DATATYPE_NUM    1
 #define DEFAULT_CHILDTABLES     10000