Merge pull request #18437 from taosdata/fix/TD-20674

fix(meta): return invalid message if cannot getting value from uididx

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

@@ -981,6 +981,11 @@ static int metaUpdateTableTagVal(SMeta *pMeta, int64_t version, SVAlterTbReq *pA
 
   /* get stbEntry*/
   tdbTbGet(pMeta->pUidIdx, &ctbEntry.ctbEntry.suid, sizeof(tb_uid_t), &pVal, &nVal);
+  if (!pVal) {
+    terrno = TSDB_CODE_INVALID_MSG;
+    goto _err;
+  }
+
   tdbTbGet(pMeta->pTbDb, &((STbDbKey){.uid = ctbEntry.ctbEntry.suid, .version = ((SUidIdxVal *)pVal)[0].version}),
            sizeof(STbDbKey), (void **)&stbEntry.pBuf, &nVal);
   tdbFree(pVal);