[TS-983]<feature>:create subtable to specific vgroups by _taos_meta_sync_table_name_taos_

src/common/inc/tglobal.h

@@ -64,6 +64,7 @@ extern int32_t  tsCompressMsgSize;
 extern int32_t  tsCompressColData;
 extern int32_t  tsMaxNumOfDistinctResults;
 extern char     tsTempDir[];
+extern int32_t  tsMetaSyncOption;
 
 // query buffer management
 extern int32_t tsQueryBufferSize;  // maximum allowed usage buffer size in MB for each data node during query processing
@@ -223,6 +224,12 @@ extern int32_t  debugFlag;
 
 extern int8_t tsClientMerge;
 
+// informal
+#define META_SYNC_TABLE_NAME "_taos_meta_sync_table_name_taos_"
+#define META_SYNC_TABLE_NAME_LEN 32
+extern int32_t tVgId;
+// informal
+
 #ifdef TD_TSZ
 // lossy
 extern char     lossyColumns[];

src/common/src/tglobal.c

@@ -65,6 +65,7 @@ char    tsLocale[TSDB_LOCALE_LEN] = {0};
 char    tsCharset[TSDB_LOCALE_LEN] = {0};  // default encode string
 int8_t  tsEnableCoreFile = 0;
 int32_t tsMaxBinaryDisplayWidth = 30;
+int32_t tsMetaSyncOption = 0;
 
 /*
  * denote if the server needs to compress response message at the application layer to client, including query rsp,
@@ -273,6 +274,10 @@ int32_t  fsDebugFlag = 135;
 
 int8_t tsClientMerge = 0;
 
+// informal
+int32_t tVgId = 0;  // vgroupd ID
+// informal
+
 #ifdef TD_TSZ
 //
 // lossy compress 6
@@ -1738,6 +1743,16 @@ static void doInitGlobalConfig(void) {
   cfg.unitType = TAOS_CFG_UTYPE_MB;
   taosInitConfigOption(cfg);
 
+  cfg.option = "metaSyncOption";
+  cfg.ptr = &tsMetaSyncOption;
+  cfg.valType = TAOS_CFG_VTYPE_INT32;
+  cfg.cfgType = TSDB_CFG_CTYPE_B_CONFIG | TSDB_CFG_CTYPE_B_SHOW;
+  cfg.minValue = 0;
+  cfg.maxValue = 1;
+  cfg.ptrLength = 0;
+  cfg.unitType = TAOS_CFG_UTYPE_NONE;
+  taosInitConfigOption(cfg);
+
 #ifdef TD_TSZ
   // lossy compress
   cfg.option = "lossyColumns";

src/mnode/src/mnodeTable.c

@@ -1726,6 +1726,9 @@ int32_t mnodeRetrieveShowSuperTables(SShowObj *pShow, char *data, int32_t rows,
     cols++;
 
     numOfRows++;
+
+    mDebug("stable: %s, uid: %" PRIu64, prefix, pTable->uid);
+
     mnodeDecTableRef(pTable);
   }
 
@@ -2227,9 +2230,27 @@ static int32_t mnodeProcessCreateChildTableMsg(SMnodeMsg *pMsg) {
     if (pMsg->pTable == NULL) {
       SVgObj *pVgroup = NULL;
       int32_t tid = 0;
+
+      if (tsMetaSyncOption) {
+        char tbName[TSDB_TABLE_NAME_LEN] = "\0";
+        strncpy(tbName, pCreate->tableName, TSDB_TABLE_NAME_LEN);
+        char *pTbName = strtok(tbName, ".");
+        if (pTbName) {
+          pTbName = strtok(NULL, ".");
+          if (pTbName) {
+            pTbName = strtok(NULL, ".");
+            if (pTbName) {
+              if (0 == strncmp(META_SYNC_TABLE_NAME, pTbName, META_SYNC_TABLE_NAME_LEN)) {
+                tVgId = atoi(pTbName + META_SYNC_TABLE_NAME_LEN);
+              }
+            }
+          }
+        }
+      }
+
       code = mnodeGetAvailableVgroup(pMsg, &pVgroup, &tid);
       if (code != TSDB_CODE_SUCCESS) {
-        mDebug("msg:%p, app:%p table:%s, failed to get available vgroup, reason:%s", pMsg, pMsg->rpcMsg.ahandle,
+        mError("msg:%p, app:%p table:%s, failed to get available vgroup, reason:%s", pMsg, pMsg->rpcMsg.ahandle,
                pCreate->tableName, tstrerror(code));
         return code;
       }

src/mnode/src/mnodeVgroup.c

@@ -432,6 +432,39 @@ int32_t mnodeGetAvailableVgroup(SMnodeMsg *pMsg, SVgObj **ppVgroup, int32_t *pSi
   SDbObj *pDb = pMsg->pDb;
   pthread_mutex_lock(&pDb->mutex);
 
+  if (tVgId > 0) {
+    for (int32_t v = 0; v < pDb->numOfVgroups; ++v) {
+      SVgObj *pVgroup = pDb->vgList[v];
+      if (pVgroup == NULL) {
+        mError("db:%s, vgroup: %d is null", pDb->name, v);
+        pthread_mutex_unlock(&pDb->mutex);
+        return TSDB_CODE_MND_APP_ERROR;
+      }
+
+      if (pVgroup->vgId != (uint32_t)tVgId) {  // find the target vgId
+        continue;
+      }
+
+      int32_t sid = taosAllocateId(pVgroup->idPool);
+      if (sid <= 0) {
+        mError("msg:%p, app:%p db:%s, no enough sid in vgId:%d", pMsg, pMsg->rpcMsg.ahandle, pDb->name, pVgroup->vgId);
+        pthread_mutex_unlock(&pDb->mutex);
+        return TSDB_CODE_MND_APP_ERROR;
+      }
+      mDebug("vgId:%d, alloc tid:%d", pVgroup->vgId, sid);
+
+      *pSid = sid;
+      *ppVgroup = pVgroup;
+      pDb->vgListIndex = v;
+
+      pthread_mutex_unlock(&pDb->mutex);
+      return TSDB_CODE_SUCCESS;
+    }
+    pthread_mutex_unlock(&pDb->mutex);
+    mError("db:%s, vgroup: %d not exist", pDb->name, tVgId);
+    return TSDB_CODE_MND_APP_ERROR;
+  }
+
   for (int32_t v = 0; v < pDb->numOfVgroups; ++v) {
     int vgIndex = (v + pDb->vgListIndex) % pDb->numOfVgroups;
     SVgObj *pVgroup = pDb->vgList[vgIndex];

src/util/inc/tconfig.h

@@ -20,7 +20,7 @@
 extern "C" {
 #endif
 
-#define TSDB_CFG_MAX_NUM    130
+#define TSDB_CFG_MAX_NUM    131
 #define TSDB_CFG_PRINT_LEN  23
 #define TSDB_CFG_OPTION_LEN 24
 #define TSDB_CFG_VALUE_LEN  41