fix: fix show database result error

source/common/src/systable.c

@@ -354,11 +354,19 @@ static const SSysTableMeta perfsMeta[] = {
     {TSDB_PERFS_TABLE_APPS, appSchema, tListLen(appSchema)}};
 
 void getInfosDbMeta(const SSysTableMeta** pInfosTableMeta, size_t* size) {
-  *pInfosTableMeta = infosMeta;
-  *size = tListLen(infosMeta);
+  if (pInfosTableMeta) {
+    *pInfosTableMeta = infosMeta;
+  }
+  if (size) {
+    *size = tListLen(infosMeta);
+  }
 }
 
 void getPerfDbMeta(const SSysTableMeta** pPerfsTableMeta, size_t* size) {
-  *pPerfsTableMeta = perfsMeta;
-  *size = tListLen(perfsMeta);
+  if (pPerfsTableMeta) {
+    *pPerfsTableMeta = perfsMeta;
+  }
+  if (size) {
+    *size = tListLen(perfsMeta);
+  }
 }

source/dnode/mnode/impl/src/mndDb.c

@@ -1691,13 +1691,17 @@ static int32_t mndRetrieveDbs(SRpcMsg *pReq, SShowObj *pShow, SSDataBlock *pBloc
   if (!pShow->sysDbRsp) {
     SDbObj infoschemaDb = {0};
     setInformationSchemaDbCfg(&infoschemaDb);
-    dumpDbInfoData(pBlock, &infoschemaDb, pShow, numOfRows, 14, true, 0, 1);
+    size_t numOfTables = 0;
+    getInfosDbMeta(NULL, &numOfTables);
+    dumpDbInfoData(pBlock, &infoschemaDb, pShow, numOfRows, numOfTables, true, 0, 1);
 
     numOfRows += 1;
 
     SDbObj perfschemaDb = {0};
     setPerfSchemaDbCfg(&perfschemaDb);
-    dumpDbInfoData(pBlock, &perfschemaDb, pShow, numOfRows, 3, true, 0, 1);
+    numOfTables = 0;
+    getPerfDbMeta(NULL, &numOfTables);
+    dumpDbInfoData(pBlock, &perfschemaDb, pShow, numOfRows, numOfTables, true, 0, 1);
 
     numOfRows += 1;
     pShow->sysDbRsp = true;