fix: update stb stats cache when creating/dropping child tables

source/dnode/vnode/src/inc/meta.h

@@ -70,6 +70,7 @@ int32_t metaCacheDrop(SMeta* pMeta, int64_t uid);
 int32_t metaStatsCacheUpsert(SMeta* pMeta, SMetaStbStats* pInfo);
 int32_t metaStatsCacheDrop(SMeta* pMeta, int64_t uid);
 int32_t metaStatsCacheGet(SMeta* pMeta, int64_t uid, SMetaStbStats* pInfo);
+void metaUpdateStbStats(SMeta *pMeta, int64_t uid, int64_t delta);
 
 struct SMeta {
   TdThreadRwlock lock;

source/dnode/vnode/src/meta/metaQuery.c

@@ -1445,3 +1445,13 @@ int32_t metaGetStbStats(SMeta *pMeta, int64_t uid, SMetaStbStats *pInfo) {
 _exit:
   return code;
 }
+
+void metaUpdateStbStats(SMeta *pMeta, int64_t uid, int64_t delta) {
+  SMetaStbStats stats = {0};
+
+  if (metaStatsCacheGet(pMeta, uid, &stats) == TSDB_CODE_SUCCESS) {
+    stats.ctbNum += delta;
+
+    metaStatsCacheUpsert(pMeta, &stats);
+  }
+}

source/dnode/vnode/src/meta/metaTable.c

@@ -371,7 +371,7 @@ int metaAlterSTable(SMeta *pMeta, int64_t version, SVCreateStbReq *pReq) {
   // update uid index
   metaUpdateUidIdx(pMeta, &nStbEntry);
 
-  metaStatsCacheDrop(pMeta, nStbEntry.uid);
+  // metaStatsCacheDrop(pMeta, nStbEntry.uid);
 
   metaULock(pMeta);
 
@@ -450,6 +450,10 @@ int metaCreateTable(SMeta *pMeta, int64_t version, SVCreateTbReq *pReq, STableMe
 #endif
 
     ++pMeta->pVnode->config.vndStats.numOfCTables;
+
+    metaWLock(pMeta);
+    metaUpdateStbStats(pMeta, me.ctbEntry.suid, 1);
+    metaULock(pMeta);
   } else {
     me.ntbEntry.ctime = pReq->ctime;
     me.ntbEntry.ttlDays = pReq->ttl;
@@ -670,6 +674,8 @@ static int metaDropTableByUid(SMeta *pMeta, tb_uid_t uid, int *type) {
     tdbTbDelete(pMeta->pCtbIdx, &(SCtbIdxKey){.suid = e.ctbEntry.suid, .uid = uid}, sizeof(SCtbIdxKey), &pMeta->txn);
 
     --pMeta->pVnode->config.vndStats.numOfCTables;
+
+    metaUpdateStbStats(pMeta, e.ctbEntry.suid, -1);
   } else if (e.type == TSDB_NORMAL_TABLE) {
     // drop schema.db (todo)