diff --git a/src/client/src/tscServer.c b/src/client/src/tscServer.c
index c34b285508cd91584c8a579af0219dbb05c5c711..9e43ae674dfb4a1c845b7ca4db82b1cf6be4d0dd 100644
--- a/src/client/src/tscServer.c
+++ b/src/client/src/tscServer.c
@@ -1518,6 +1518,8 @@ int tscAlterDbMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
   pCmd->msgType = (pInfo->pMiscInfo->dbOpt.dbType == TSDB_DB_TYPE_DEFAULT) ? TSDB_MSG_TYPE_CM_ALTER_DB : TSDB_MSG_TYPE_CM_ALTER_TP;
 
   SAlterDbMsg *pAlterDbMsg = (SAlterDbMsg* )pCmd->payload;
+  pAlterDbMsg->dbType = -1;
+  
   STableMetaInfo *pTableMetaInfo = tscGetTableMetaInfoFromCmd(pCmd, pCmd->clauseIndex, 0);
   tNameExtractFullName(&pTableMetaInfo->name, pAlterDbMsg->db);
 
diff --git a/src/inc/ttokendef.h b/src/inc/ttokendef.h
index 88d730ce00218c76823cb8834d7d6210cd8782cd..5ee0ec376a292360d473e81f56ff1ed487a5e10e 100644
--- a/src/inc/ttokendef.h
+++ b/src/inc/ttokendef.h
@@ -238,6 +238,7 @@
 
 
 
+
 #define TK_SPACE                          300
 #define TK_COMMENT                        301
 #define TK_ILLEGAL                        302
diff --git a/src/query/inc/sql.y b/src/query/inc/sql.y
index 94ba5dcf9d7d955ef44f579529bc3f2c3d8a21c2..1bafe241e3e6cb32a102631be9e9620a4ae48429 100644
--- a/src/query/inc/sql.y
+++ b/src/query/inc/sql.y
@@ -255,7 +255,7 @@ cachelast(Y) ::= CACHELAST INTEGER(X).        { Y = X; }
 partitions(Y) ::= PARTITIONS INTEGER(X).      { Y = X; }
 
 %type db_optr {SCreateDbInfo}
-db_optr(Y) ::= . {setDefaultCreateDbOption(&Y);}
+db_optr(Y) ::= . {setDefaultCreateDbOption(&Y); Y.dbType = TSDB_DB_TYPE_DEFAULT;}
 
 db_optr(Y) ::= db_optr(Z) cache(X).          { Y = Z; Y.cacheBlockSize = strtol(X.z, NULL, 10); }
 db_optr(Y) ::= db_optr(Z) replica(X).        { Y = Z; Y.replica = strtol(X.z, NULL, 10); }
@@ -279,7 +279,7 @@ topic_optr(Y) ::= db_optr(Z).                       { Y = Z; Y.dbType = TSDB_DB_
 topic_optr(Y) ::= topic_optr(Z) partitions(X).      { Y = Z; Y.partitions = strtol(X.z, NULL, 10); }
 
 %type alter_db_optr {SCreateDbInfo}
-alter_db_optr(Y) ::= . { setDefaultCreateDbOption(&Y);}
+alter_db_optr(Y) ::= . { setDefaultCreateDbOption(&Y); Y.dbType = TSDB_DB_TYPE_DEFAULT;}
 
 alter_db_optr(Y) ::= alter_db_optr(Z) replica(X).     { Y = Z; Y.replica = strtol(X.z, NULL, 10); }
 alter_db_optr(Y) ::= alter_db_optr(Z) quorum(X).      { Y = Z; Y.quorum = strtol(X.z, NULL, 10); }
diff --git a/src/query/src/qParserImpl.c b/src/query/src/qParserImpl.c
index c855b38d4a9aa6140dbc62e8251327ee15b785d5..eed602a8c20d2880920295cf37c7eda469d47b56 100644
--- a/src/query/src/qParserImpl.c
+++ b/src/query/src/qParserImpl.c
@@ -936,10 +936,10 @@ void setDefaultCreateDbOption(SCreateDbInfo *pDBInfo) {
   pDBInfo->keep = NULL;
 
   pDBInfo->update = -1;
-  pDBInfo->cachelast = 0;
+  pDBInfo->cachelast = -1;
 
-  pDBInfo->dbType = TSDB_DB_TYPE_DEFAULT;
-  pDBInfo->partitions = TSDB_DEFAULT_DB_PARTITON_OPTION;
+  pDBInfo->dbType = -1;
+  pDBInfo->partitions = -1;
   
   memset(&pDBInfo->precision, 0, sizeof(SStrToken));
 }
diff --git a/src/query/src/sql.c b/src/query/src/sql.c
index ef66300f661aba3e8bb04ac878751d2714c41be2..bed9121b0411177788193b15afd10490dc187651 100644
--- a/src/query/src/sql.c
+++ b/src/query/src/sql.c
@@ -2682,7 +2682,7 @@ static YYACTIONTYPE yy_reduce(
 { yymsp[-1].minor.yy0 = yymsp[0].minor.yy0; }
         break;
       case 93: /* db_optr ::= */
-{setDefaultCreateDbOption(&yymsp[1].minor.yy100);}
+{setDefaultCreateDbOption(&yymsp[1].minor.yy100); yymsp[1].minor.yy100.dbType = TSDB_DB_TYPE_DEFAULT;}
         break;
       case 94: /* db_optr ::= db_optr cache */
 { yylhsminor.yy100 = yymsp[-1].minor.yy100; yylhsminor.yy100.cacheBlockSize = strtol(yymsp[0].minor.yy0.z, NULL, 10); }
@@ -2764,7 +2764,7 @@ static YYACTIONTYPE yy_reduce(
   yymsp[-1].minor.yy100 = yylhsminor.yy100;
         break;
       case 111: /* alter_db_optr ::= */
-{ setDefaultCreateDbOption(&yymsp[1].minor.yy100);}
+{ setDefaultCreateDbOption(&yymsp[1].minor.yy100); yymsp[1].minor.yy100.dbType = TSDB_DB_TYPE_DEFAULT;}
         break;
       case 123: /* typename ::= ids */
 {