diff --git a/src/client/inc/tsclient.h b/src/client/inc/tsclient.h
index 24e0f48ec9715ec2b1bc1b1e2ba87962ff903728..ed3b481d0e7d694eec2591345cd72d884592563d 100644
--- a/src/client/inc/tsclient.h
+++ b/src/client/inc/tsclient.h
@@ -286,7 +286,7 @@ typedef struct STscObj {
   char               user[TSDB_USER_LEN];
   char               pass[TSDB_KEY_LEN];
   char               acctId[TSDB_ACCT_LEN];
-  char               db[TSDB_DB_NAME_LEN];
+  char               db[TSDB_ACCT_LEN + TSDB_DB_NAME_LEN];
   char               sversion[TSDB_VERSION_LEN];
   char               writeAuth : 1;
   char               superAuth : 1;
diff --git a/src/client/src/tscSQLParser.c b/src/client/src/tscSQLParser.c
index 8e5a43943174cbf3741dd03db9233753d40b139d..3f0af8f4660cf6e2e9deab02010115e88402d031 100644
--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -1042,7 +1042,7 @@ int32_t setObjFullName(char* fullName, const char* account, SSQLToken* pDB, SSQL
 
   /* db name is not specified, the tableName dose not include db name */
   if (pDB != NULL) {
-    if (pDB->n >= TSDB_DB_NAME_LEN) {
+    if (pDB->n >= TSDB_ACCT_LEN + TSDB_DB_NAME_LEN) {
       return TSDB_CODE_TSC_INVALID_SQL;
     }
 
diff --git a/src/inc/taosmsg.h b/src/inc/taosmsg.h
index 1198097895c4dc2939b0405decb56439d9822527..8e732f0cac3fd223a00c19e5fff7106e0946633d 100644
--- a/src/inc/taosmsg.h
+++ b/src/inc/taosmsg.h
@@ -250,7 +250,7 @@ typedef struct {
 
 typedef struct {
   char    tableId[TSDB_TABLE_ID_LEN];
-  char    db[TSDB_DB_NAME_LEN];
+  char    db[TSDB_ACCT_LEN + TSDB_DB_NAME_LEN];
   int8_t  igExists;
   int8_t  getMeta;
   int16_t numOfTags;
@@ -268,7 +268,7 @@ typedef struct {
 
 typedef struct {
   char    tableId[TSDB_TABLE_ID_LEN];
-  char    db[TSDB_DB_NAME_LEN];
+  char    db[TSDB_ACCT_LEN + TSDB_DB_NAME_LEN];
   int16_t type; /* operation type   */
   int16_t numOfCols; /* number of schema */
   int32_t tagValLen;
@@ -670,7 +670,7 @@ typedef struct {
  */
 typedef struct {
   int8_t   type;
-  char     db[TSDB_DB_NAME_LEN];
+  char     db[TSDB_ACCT_LEN + TSDB_DB_NAME_LEN];
   uint16_t payloadLen;
   char     payload[];
 } SCMShowMsg;