fix: a privilege problem of show tables

source/libs/parser/src/parAstCreater.c

@@ -1251,7 +1251,8 @@ SNode* createUseDatabaseStmt(SAstCreateContext* pCxt, SToken* pDbName) {
 
 static bool needDbShowStmt(ENodeType type) {
   return QUERY_NODE_SHOW_TABLES_STMT == type || QUERY_NODE_SHOW_STABLES_STMT == type ||
-         QUERY_NODE_SHOW_VGROUPS_STMT == type;
+         QUERY_NODE_SHOW_VGROUPS_STMT == type || QUERY_NODE_SHOW_INDEXES_STMT == type ||
+         QUERY_NODE_SHOW_TAGS_STMT == type;
 }
 
 SNode* createShowStmt(SAstCreateContext* pCxt, ENodeType type) {
@@ -1264,7 +1265,7 @@ SNode* createShowStmt(SAstCreateContext* pCxt, ENodeType type) {
 SNode* createShowStmtWithCond(SAstCreateContext* pCxt, ENodeType type, SNode* pDbName, SNode* pTbName,
                               EOperatorType tableCondType) {
   CHECK_PARSER_STATUS(pCxt);
-  if (needDbShowStmt(type) && NULL == pDbName && NULL == pCxt->pQueryCxt->db) {
+  if (needDbShowStmt(type) && NULL == pDbName) {
     snprintf(pCxt->pQueryCxt->pMsg, pCxt->pQueryCxt->msgLen, "db not specified");
     pCxt->errCode = TSDB_CODE_PAR_SYNTAX_ERROR;
     return NULL;

source/libs/parser/src/parAstParser.c

@@ -374,8 +374,13 @@ static int32_t collectMetaKeyFromShowIndexes(SCollectMetaKeyCxt* pCxt, SShowStmt
 }
 
 static int32_t collectMetaKeyFromShowStables(SCollectMetaKeyCxt* pCxt, SShowStmt* pStmt) {
-  return reserveTableMetaInCache(pCxt->pParseCxt->acctId, TSDB_INFORMATION_SCHEMA_DB, TSDB_INS_TABLE_STABLES,
-                                 pCxt->pMetaCache);
+  int32_t code = reserveTableMetaInCache(pCxt->pParseCxt->acctId, TSDB_INFORMATION_SCHEMA_DB, TSDB_INS_TABLE_STABLES,
+                                         pCxt->pMetaCache);
+  if (TSDB_CODE_SUCCESS == code) {
+    code = reserveUserAuthInCache(pCxt->pParseCxt->acctId, pCxt->pParseCxt->pUser,
+                                  ((SValueNode*)pStmt->pDbName)->literal, AUTH_TYPE_READ, pCxt->pMetaCache);
+  }
+  return code;
 }
 
 static int32_t collectMetaKeyFromShowStreams(SCollectMetaKeyCxt* pCxt, SShowStmt* pStmt) {
@@ -387,11 +392,11 @@ static int32_t collectMetaKeyFromShowTables(SCollectMetaKeyCxt* pCxt, SShowStmt*
   int32_t code = reserveTableMetaInCache(pCxt->pParseCxt->acctId, TSDB_INFORMATION_SCHEMA_DB, TSDB_INS_TABLE_TABLES,
                                          pCxt->pMetaCache);
   if (TSDB_CODE_SUCCESS == code) {
-    if (NULL != pStmt->pDbName) {
-      code = reserveDbVgInfoInCache(pCxt->pParseCxt->acctId, ((SValueNode*)pStmt->pDbName)->literal, pCxt->pMetaCache);
-    } else {
-      code = reserveDbVgInfoInCache(pCxt->pParseCxt->acctId, TSDB_INFORMATION_SCHEMA_DB, pCxt->pMetaCache);
-    }
+    code = reserveDbVgInfoInCache(pCxt->pParseCxt->acctId, ((SValueNode*)pStmt->pDbName)->literal, pCxt->pMetaCache);
+  }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = reserveUserAuthInCache(pCxt->pParseCxt->acctId, pCxt->pParseCxt->pUser,
+                                  ((SValueNode*)pStmt->pDbName)->literal, AUTH_TYPE_READ, pCxt->pMetaCache);
   }
   return code;
 }
@@ -400,11 +405,7 @@ static int32_t collectMetaKeyFromShowTags(SCollectMetaKeyCxt* pCxt, SShowStmt* p
   int32_t code = reserveTableMetaInCache(pCxt->pParseCxt->acctId, TSDB_INFORMATION_SCHEMA_DB, TSDB_INS_TABLE_TAGS,
                                          pCxt->pMetaCache);
   if (TSDB_CODE_SUCCESS == code) {
-    if (NULL != pStmt->pDbName) {
-      code = reserveDbVgInfoInCache(pCxt->pParseCxt->acctId, ((SValueNode*)pStmt->pDbName)->literal, pCxt->pMetaCache);
-    } else {
-      code = reserveDbVgInfoInCache(pCxt->pParseCxt->acctId, TSDB_INFORMATION_SCHEMA_DB, pCxt->pMetaCache);
-    }
+    code = reserveDbVgInfoInCache(pCxt->pParseCxt->acctId, ((SValueNode*)pStmt->pDbName)->literal, pCxt->pMetaCache);
   }
   return code;
 }

source/libs/parser/src/parAuthenticator.c

@@ -96,6 +96,10 @@ static int32_t authInsert(SAuthCxt* pCxt, SInsertStmt* pInsert) {
   return code;
 }
 
+static int32_t authShowTables(SAuthCxt* pCxt, SShowStmt* pStmt) {
+  return checkAuth(pCxt, ((SValueNode*)pStmt->pDbName)->literal, AUTH_TYPE_READ);
+}
+
 static int32_t authShowCreateTable(SAuthCxt* pCxt, SShowCreateTableStmt* pStmt) {
   return checkAuth(pCxt, pStmt->dbName, AUTH_TYPE_READ);
 }
@@ -127,6 +131,9 @@ static int32_t authQuery(SAuthCxt* pCxt, SNode* pStmt) {
     case QUERY_NODE_SHOW_VNODES_STMT:
     case QUERY_NODE_SHOW_SCORES_STMT:
       return !pCxt->pParseCxt->enableSysInfo ? TSDB_CODE_PAR_PERMISSION_DENIED : TSDB_CODE_SUCCESS;
+    case QUERY_NODE_SHOW_TABLES_STMT:
+    case QUERY_NODE_SHOW_STABLES_STMT:
+      return authShowTables(pCxt, (SShowStmt*)pStmt);
     case QUERY_NODE_SHOW_CREATE_TABLE_STMT:
     case QUERY_NODE_SHOW_CREATE_STABLE_STMT:
       return authShowCreateTable(pCxt, (SShowCreateTableStmt*)pStmt);

tests/system-test/0-others/user_control.py

@@ -282,12 +282,12 @@ class TDTestCase:
                 use.error(f"insert into {DBNAME}.{CTBNAME} (ts) values (now())")
             elif check_priv == PRIVILEGES_WRITE:
                 use.query(f"use {DBNAME}")
-                use.query(f"show {DBNAME}.tables")
+                use.error(f"show {DBNAME}.tables")
                 use.error(f"select * from {DBNAME}.{CTBNAME}")
                 use.query(f"insert into {DBNAME}.{CTBNAME} (ts) values (now())")
             elif check_priv is None:
                 use.error(f"use {DBNAME}")
-                # use.error(f"show {DBNAME}.tables")
+                use.error(f"show {DBNAME}.tables")
                 use.error(f"show tables")
                 use.error(f"select * from {DBNAME}.{CTBNAME}")
                 use.error(f"insert into {DBNAME}.{CTBNAME} (ts) values (now())")