fix: a problem of parser async

source/libs/parser/src/parAstParser.c

@@ -179,6 +179,10 @@ static int32_t collectMetaKeyFromSelect(SCollectMetaKeyCxt* pCxt, SSelectStmt* p
   return cxt.errCode;
 }
 
+static int32_t collectMetaKeyFromAlterDatabase(SCollectMetaKeyCxt* pCxt, SAlterDatabaseStmt* pStmt) {
+  return reserveDbCfgInCache(pCxt->pParseCxt->acctId, pStmt->dbName, pCxt->pMetaCache);
+}
+
 static int32_t collectMetaKeyFromCreateTable(SCollectMetaKeyCxt* pCxt, SCreateTableStmt* pStmt) {
   int32_t code = reserveDbCfgInCache(pCxt->pParseCxt->acctId, pStmt->dbName, pCxt->pMetaCache);
   if (TSDB_CODE_SUCCESS == code && NULL == pStmt->pTags) {
@@ -376,6 +380,8 @@ static int32_t collectMetaKeyFromQuery(SCollectMetaKeyCxt* pCxt, SNode* pStmt) {
       return collectMetaKeyFromSetOperator(pCxt, (SSetOperator*)pStmt);
     case QUERY_NODE_SELECT_STMT:
       return collectMetaKeyFromSelect(pCxt, (SSelectStmt*)pStmt);
+    case QUERY_NODE_ALTER_DATABASE_STMT:
+      return collectMetaKeyFromAlterDatabase(pCxt, (SAlterDatabaseStmt*)pStmt);
     case QUERY_NODE_CREATE_TABLE_STMT:
       return collectMetaKeyFromCreateTable(pCxt, (SCreateTableStmt*)pStmt);
     case QUERY_NODE_CREATE_MULTI_TABLE_STMT:

source/libs/parser/test/parInitialATest.cpp

@@ -39,6 +39,8 @@ TEST_F(ParserInitialATest, alterDatabase) {
   useDb("root", "test");
 
   run("ALTER DATABASE wxy_db CACHELAST 1 FSYNC 200 WAL 1");
+
+  run("ALTER DATABASE wxy_db KEEP 2400");
 }
 
 // todo ALTER local