fix: show create table privilege issue

source/libs/catalog/src/ctgUtil.c

@@ -1482,7 +1482,7 @@ int32_t ctgChkSetAuthRes(SCatalog* pCtg, SCtgAuthReq* req, SCtgAuthRsp* res) {
 
   switch (pReq->type) {
     case AUTH_TYPE_READ: {
-      if (pInfo->readTbs && taosHashGetSize(pInfo->readTbs) > 0) {
+      if (pReq->tbName.type == TSDB_TABLE_NAME_T && pInfo->readTbs && taosHashGetSize(pInfo->readTbs) > 0) {
         req->singleType = AUTH_TYPE_READ;
         CTG_ERR_RET(ctgChkSetTbAuthRes(pCtg, req, res));
         if (pRes->pass || res->metaNotExists) {
@@ -1498,7 +1498,7 @@ int32_t ctgChkSetAuthRes(SCatalog* pCtg, SCtgAuthReq* req, SCtgAuthRsp* res) {
       break;
     }
     case AUTH_TYPE_WRITE: {
-      if (pInfo->writeTbs && taosHashGetSize(pInfo->writeTbs) > 0) {
+      if (pReq->tbName.type == TSDB_TABLE_NAME_T && pInfo->writeTbs && taosHashGetSize(pInfo->writeTbs) > 0) {
         req->singleType = AUTH_TYPE_WRITE;
         CTG_ERR_RET(ctgChkSetTbAuthRes(pCtg, req, res));
         if (pRes->pass || res->metaNotExists) {

source/libs/parser/src/parAstParser.c

@@ -581,7 +581,7 @@ static int32_t collectMetaKeyFromShowCreateTable(SCollectMetaKeyCxt* pCxt, SShow
     code = reserveDbCfgInCache(pCxt->pParseCxt->acctId, pStmt->dbName, pCxt->pMetaCache);
   }
   if (TSDB_CODE_SUCCESS == code) {
-    code = reserveUserAuthInCache(pCxt->pParseCxt->acctId, pCxt->pParseCxt->pUser, pStmt->dbName, NULL, AUTH_TYPE_READ,
+    code = reserveUserAuthInCache(pCxt->pParseCxt->acctId, pCxt->pParseCxt->pUser, pStmt->dbName, pStmt->tableName, AUTH_TYPE_READ,
                                   pCxt->pMetaCache);
   }
   return code;

source/libs/parser/src/parAuthenticator.c

@@ -175,7 +175,7 @@ static int32_t authShowTables(SAuthCxt* pCxt, SShowStmt* pStmt) {
 static int32_t authShowCreateTable(SAuthCxt* pCxt, SShowCreateTableStmt* pStmt) {
   SNode* pTagCond = NULL;
   // todo check tag condition for subtable
-  return checkAuth(pCxt, pStmt->dbName, NULL, AUTH_TYPE_READ, &pTagCond);
+  return checkAuth(pCxt, pStmt->dbName, pStmt->tableName, AUTH_TYPE_READ, &pTagCond);
 }
 
 static int32_t authCreateTable(SAuthCxt* pCxt, SCreateTableStmt* pStmt) {

source/libs/parser/src/parUtil.c

@@ -498,7 +498,7 @@ int32_t getVnodeSysTableTargetName(int32_t acctId, SNode* pWhere, SName* pName)
 
 static int32_t userAuthToString(int32_t acctId, const char* pUser, const char* pDb, const char* pTable, AUTH_TYPE type,
                                 char* pStr) {
-  return sprintf(pStr, "%s*%d*%s*%s*%d", pUser, acctId, pDb, (NULL != pTable && '\0' == pTable[0]) ? NULL : pTable,
+  return sprintf(pStr, "%s*%d*%s*%s*%d", pUser, acctId, pDb, (NULL == pTable || '\0' == pTable[0]) ? "``" : pTable,
                  type);
 }
 
@@ -524,6 +524,9 @@ static void getStringFromAuthStr(const char* pStart, char* pStr, char** pNext) {
     strncpy(pStr, pStart, p - pStart);
     *pNext = ++p;
   }
+  if (*pStart == '`' && *(pStart + 1) == '`') {
+    *pStr = 0;
+  }
 }
 
 static void stringToUserAuth(const char* pStr, int32_t len, SUserAuthInfo* pUserAuth) {
@@ -532,7 +535,11 @@ static void stringToUserAuth(const char* pStr, int32_t len, SUserAuthInfo* pUser
   pUserAuth->tbName.acctId = getIntegerFromAuthStr(p, &p);
   getStringFromAuthStr(p, pUserAuth->tbName.dbname, &p);
   getStringFromAuthStr(p, pUserAuth->tbName.tname, &p);
-  pUserAuth->tbName.type = TSDB_TABLE_NAME_T;
+  if (pUserAuth->tbName.tname[0]) {
+    pUserAuth->tbName.type = TSDB_TABLE_NAME_T;
+  } else {
+    pUserAuth->tbName.type = TSDB_DB_NAME_T;
+  }
   pUserAuth->type = getIntegerFromAuthStr(p, &p);
 }