feat: add user tags system table

include/common/tmsg.h

@@ -99,6 +99,7 @@ typedef enum _mgmt_table {
   TSDB_MGMT_TABLE_STB,
   TSDB_MGMT_TABLE_STREAMS,
   TSDB_MGMT_TABLE_TABLE,
+  TSDB_MGMT_TABLE_TAG,
   TSDB_MGMT_TABLE_USER,
   TSDB_MGMT_TABLE_GRANTS,
   TSDB_MGMT_TABLE_VGROUP,

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

@@ -76,6 +76,8 @@ static int32_t convertToRetrieveType(char *name, int32_t len) {
     type = TSDB_MGMT_TABLE_STB;
   } else if (strncasecmp(name, TSDB_INS_TABLE_USER_TABLES, len) == 0) {
     type = TSDB_MGMT_TABLE_TABLE;
+  } else if (strncasecmp(name, TSDB_INS_TABLE_USER_TAGS, len) == 0) {
+    type = TSDB_MGMT_TABLE_TAG;
   } else if (strncasecmp(name, TSDB_INS_TABLE_USER_TABLE_DISTRIBUTED, len) == 0) {
     //    type = TSDB_MGMT_TABLE_DIST;
   } else if (strncasecmp(name, TSDB_INS_TABLE_USER_USERS, len) == 0) {

source/libs/executor/src/scanoperator.c

@@ -1595,7 +1595,9 @@ static void destroySysScanOperator(void* param, int32_t numOfOutput) {
   blockDataDestroy(pInfo->pRes);
 
   const char* name = tNameGetTableName(&pInfo->name);
-  if (strncasecmp(name, TSDB_INS_TABLE_USER_TABLES, TSDB_TABLE_FNAME_LEN) == 0 || pInfo->pCur != NULL) {
+  if (strncasecmp(name, TSDB_INS_TABLE_USER_TABLES, TSDB_TABLE_FNAME_LEN) == 0 ||
+      strncasecmp(name, TSDB_INS_TABLE_USER_TAGS, TSDB_TABLE_FNAME_LEN) == 0 ||
+      pInfo->pCur != NULL) {
     metaCloseTbCursor(pInfo->pCur);
     pInfo->pCur = NULL;
   }
@@ -2247,7 +2249,8 @@ SOperatorInfo* createSysTableScanOperatorInfo(void* readHandle, SSystemTableScan
   tNameAssign(&pInfo->name, &pScanNode->tableName);
   const char* name = tNameGetTableName(&pInfo->name);
 
-  if (strncasecmp(name, TSDB_INS_TABLE_USER_TABLES, TSDB_TABLE_FNAME_LEN) == 0) {
+  if (strncasecmp(name, TSDB_INS_TABLE_USER_TABLES, TSDB_TABLE_FNAME_LEN) == 0 ||
+      strncasecmp(name, TSDB_INS_TABLE_USER_TAGS, TSDB_TABLE_FNAME_LEN) == 0) {
     pInfo->readHandle = *(SReadHandle*)readHandle;
     blockDataEnsureCapacity(pInfo->pRes, pOperator->resultInfo.capacity);
   } else {