diff --git a/include/common/tdataformat.h b/include/common/tdataformat.h
index e768f89372..d37b8ce1ca 100644
--- a/include/common/tdataformat.h
+++ b/include/common/tdataformat.h
@@ -167,7 +167,7 @@ struct SColVal {
 
 #pragma pack(push, 1)
 struct STagVal {
-  char colName[TSDB_COL_NAME_LEN]; // only used for tmq_get_meta
+//  char colName[TSDB_COL_NAME_LEN]; // only used for tmq_get_meta
   union {
     int16_t cid;
     char   *pKey;