[td-13039] add the show command.

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

@@ -116,7 +116,7 @@ static const SInfosTableSchema userUsersSchema[] = {{.name = "name",           .
                                                     {.name = "account",        .bytes = TSDB_USER_LEN + VARSTR_HEADER_SIZE,    .type = TSDB_DATA_TYPE_BINARY},
                                                    };
 static const SInfosTableSchema vgroupsSchema[] = {{.name = "vgroup_id",        .bytes = 4,   .type = TSDB_DATA_TYPE_INT},
-                                                  {.name = "db_name",          .bytes = 32,   .type = TSDB_DATA_TYPE_BINARY},
+                                                  {.name = "db_name",          .bytes = (TSDB_DB_NAME_LEN - 1) + VARSTR_HEADER_SIZE,   .type = TSDB_DATA_TYPE_BINARY},
                                                   {.name = "tables",           .bytes = 4,   .type = TSDB_DATA_TYPE_INT},
                                                   {.name = "status",           .bytes = 10,  .type = TSDB_DATA_TYPE_BINARY},
                                                   {.name = "onlines",          .bytes = 4,   .type = TSDB_DATA_TYPE_INT},

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

@@ -1576,7 +1576,10 @@ static int32_t mndRetrieveStb(SMnodeMsg *pReq, SShowObj *pShow, char *data, int3
     sdbRelease(pSdb, pStb);
   }
 
-  mndReleaseDb(pMnode, pDb);
+  if (pDb != NULL) {
+    mndReleaseDb(pMnode, pDb);
+  }
+
   pShow->numOfReads += numOfRows;
   mndVacuumResult(data, pShow->numOfColumns, numOfRows, rows, pShow);
   return numOfRows;

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

@@ -559,41 +559,72 @@ static int32_t mndRetrieveVgroups(SMnodeMsg *pReq, SShowObj *pShow, char *data,
   int32_t cols = 0;
   char   *pWrite;
 
-  SDbObj *pDb = mndAcquireDb(pMnode, pShow->db);
-  if (pDb == NULL) return 0;
+  SDbObj *pDb = NULL;
+  if (strlen(pShow->db) > 0) {
+    pDb = mndAcquireDb(pMnode, pShow->db);
+    if (pDb == NULL) {
+      return 0;
+    }
+  }
 
   while (numOfRows < rows) {
     pShow->pIter = sdbFetch(pSdb, SDB_VGROUP, pShow->pIter, (void **)&pVgroup);
     if (pShow->pIter == NULL) break;
 
-    if (pVgroup->dbUid == pDb->uid) {
-      cols = 0;
+    if (pDb != NULL && pVgroup->dbUid != pDb->uid) {
+      continue;
+    }
+
+    cols = 0;
+
+//    mndGetVgroupMaxReplica(pMnode, pShow->db, &pShow->replica, &pShow->numOfRows);
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int32_t *)pWrite = pVgroup->vgId;
+    cols++;
+
+    SName name = {0};
+    char  db[TSDB_DB_NAME_LEN] = {0};
+    tNameFromString(&name, pVgroup->dbName, T_NAME_ACCT|T_NAME_DB);
+    tNameGetDbName(&name, db);
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    STR_TO_VARSTR(pWrite, db);
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int32_t *)pWrite = pVgroup->numOfTables;
+    cols++;
 
+    //status
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    STR_TO_VARSTR(pWrite, "ready"); // TODO
+    cols++;
+
+    //onlines
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int32_t *)pWrite = pVgroup->replica;
+    cols++;
+
+
+    for (int32_t i = 0; i < pVgroup->replica; ++i) {
       pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
-      *(int32_t *)pWrite = pVgroup->vgId;
+      *(int16_t *)pWrite = pVgroup->vnodeGid[i].dnodeId;
       cols++;
 
+      const char *role = mndGetRoleStr(pVgroup->vnodeGid[i].role);
       pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
-      *(int32_t *)pWrite = pVgroup->numOfTables;
+      STR_WITH_MAXSIZE_TO_VARSTR(pWrite, role, pShow->bytes[cols]);
       cols++;
-
-      for (int32_t i = 0; i < pShow->replica; ++i) {
-        pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
-        *(int16_t *)pWrite = pVgroup->vnodeGid[i].dnodeId;
-        cols++;
-
-        const char *role = mndGetRoleStr(pVgroup->vnodeGid[i].role);
-        pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
-        STR_WITH_MAXSIZE_TO_VARSTR(pWrite, role, pShow->bytes[cols]);
-        cols++;
-      }
-      numOfRows++;
     }
 
+    numOfRows++;
     sdbRelease(pSdb, pVgroup);
   }
 
-  mndReleaseDb(pMnode, pDb);
+  if (pDb != NULL) {
+    mndReleaseDb(pMnode, pDb);
+  }
+
   mndVacuumResult(data, pShow->numOfColumns, numOfRows, rows, pShow);
   pShow->numOfReads += numOfRows;
   return numOfRows;