fix: sql command 'show cluster' error

source/client/src/clientMain.c

@@ -657,12 +657,17 @@ typedef struct SqlParseWrapper {
   SQuery        *pQuery;
 } SqlParseWrapper;
 
+static void destoryTablesReq(void *p) {
+  STablesReq *pRes = (STablesReq *)p;
+  taosArrayDestroy(pRes->pTables);
+}
+
 static void destorySqlParseWrapper(SqlParseWrapper *pWrapper) {
   taosArrayDestroy(pWrapper->catalogReq.pDbVgroup);
   taosArrayDestroy(pWrapper->catalogReq.pDbCfg);
   taosArrayDestroy(pWrapper->catalogReq.pDbInfo);
-  taosArrayDestroy(pWrapper->catalogReq.pTableMeta);
-  taosArrayDestroy(pWrapper->catalogReq.pTableHash);
+  taosArrayDestroyEx(pWrapper->catalogReq.pTableMeta, destoryTablesReq);
+  taosArrayDestroyEx(pWrapper->catalogReq.pTableHash, destoryTablesReq);
   taosArrayDestroy(pWrapper->catalogReq.pUdf);
   taosArrayDestroy(pWrapper->catalogReq.pIndex);
   taosArrayDestroy(pWrapper->catalogReq.pUser);

source/libs/parser/src/parAstParser.c

@@ -339,6 +339,11 @@ static int32_t collectMetaKeyFromShowBnodes(SCollectMetaKeyCxt* pCxt, SShowStmt*
                                  pCxt->pMetaCache);
 }
 
+static int32_t collectMetaKeyFromShowCluster(SCollectMetaKeyCxt* pCxt, SShowStmt* pStmt) {
+  return reserveTableMetaInCache(pCxt->pParseCxt->acctId, TSDB_INFORMATION_SCHEMA_DB, TSDB_INS_TABLE_CLUSTER,
+                                 pCxt->pMetaCache);
+}
+
 static int32_t collectMetaKeyFromShowDatabases(SCollectMetaKeyCxt* pCxt, SShowStmt* pStmt) {
   return reserveTableMetaInCache(pCxt->pParseCxt->acctId, TSDB_INFORMATION_SCHEMA_DB, TSDB_INS_TABLE_DATABASES,
                                  pCxt->pMetaCache);
@@ -547,6 +552,8 @@ static int32_t collectMetaKeyFromQuery(SCollectMetaKeyCxt* pCxt, SNode* pStmt) {
       return collectMetaKeyFromShowSnodes(pCxt, (SShowStmt*)pStmt);
     case QUERY_NODE_SHOW_BNODES_STMT:
       return collectMetaKeyFromShowBnodes(pCxt, (SShowStmt*)pStmt);
+    case QUERY_NODE_SHOW_CLUSTER_STMT:
+      return collectMetaKeyFromShowCluster(pCxt, (SShowStmt*)pStmt);
     case QUERY_NODE_SHOW_DATABASES_STMT:
       return collectMetaKeyFromShowDatabases(pCxt, (SShowStmt*)pStmt);
     case QUERY_NODE_SHOW_FUNCTIONS_STMT:

source/libs/parser/test/mockCatalog.cpp

@@ -119,6 +119,12 @@ void generateInformationSchema(MockCatalogService* mcs) {
             .addColumn("dnode_id", TSDB_DATA_TYPE_INT);
     builder.done();
   }
+  {
+    ITableBuilder& builder =
+        mcs->createTableBuilder(TSDB_INFORMATION_SCHEMA_DB, TSDB_INS_TABLE_CLUSTER, TSDB_SYSTEM_TABLE, 1)
+            .addColumn("id", TSDB_DATA_TYPE_BIGINT);
+    builder.done();
+  }
 }
 
 void generatePerformanceSchema(MockCatalogService* mcs) {

source/libs/parser/test/parShowToUse.cpp

@@ -25,6 +25,15 @@ class ParserShowToUseTest : public ParserDdlTest {};
 // todo SHOW apps
 // todo SHOW connections
 
+TEST_F(ParserShowToUseTest, showCluster) {
+  useDb("root", "test");
+
+  setCheckDdlFunc(
+      [&](const SQuery* pQuery, ParserStage stage) { ASSERT_EQ(nodeType(pQuery->pRoot), QUERY_NODE_SELECT_STMT); });
+
+  run("SHOW CLUSTER");
+}
+
 TEST_F(ParserShowToUseTest, showConsumers) {
   useDb("root", "test");