feat: sql command 'show consumers' and 'show subscriptions'

source/libs/parser/src/parUtil.c

@@ -929,7 +929,7 @@ int32_t reserveDnodeRequiredInCache(SParseMetaCache* pMetaCache) {
 
 int32_t getDnodeListFromCache(SParseMetaCache* pMetaCache, SArray** pDnodes) {
   SMetaRes* pRes = taosArrayGet(pMetaCache->pDnodes, 0);
-  if (pRes->code) {
+  if (TSDB_CODE_SUCCESS != pRes->code) {
     return pRes->code;
   }
 

source/libs/parser/test/mockCatalogService.cpp

@@ -166,13 +166,10 @@ class MockCatalogServiceImpl {
   }
 
   int32_t catalogGetDnodeList(SArray** pDnodes) const {
-    SMetaRes res = {0};
-    res.pRes = taosArrayInit(dnode_.size(), sizeof(SEpSet));
+    *pDnodes = taosArrayInit(dnode_.size(), sizeof(SEpSet));
     for (const auto& dnode : dnode_) {
-      taosArrayPush((SArray*)res.pRes, &dnode.second);
+      taosArrayPush(*pDnodes, &dnode.second);
     }
-    *pDnodes = taosArrayInit(1, sizeof(SMetaRes));
-    taosArrayPush(*pDnodes, &res);
     return TSDB_CODE_SUCCESS;
   }
 
@@ -200,7 +197,7 @@ class MockCatalogServiceImpl {
       code = getAllTableIndex(pCatalogReq->pTableIndex, &pMetaData->pTableIndex);
     }
     if (TSDB_CODE_SUCCESS == code && pCatalogReq->dNodeRequired) {
-      code = catalogGetDnodeList(&pMetaData->pDnodeList);
+      code = getAllDnodeList(&pMetaData->pDnodeList);
     }
     if (TSDB_CODE_SUCCESS == code) {
       code = getAllTableCfg(pCatalogReq->pTableCfg, &pMetaData->pTableCfg);
@@ -565,6 +562,13 @@ class MockCatalogServiceImpl {
     return TSDB_CODE_SUCCESS;
   }
 
+  int32_t getAllDnodeList(SArray** pDnodes) const {
+    SMetaRes res = {0};
+    *pDnodes = taosArrayInit(1, sizeof(SMetaRes));
+    taosArrayPush(*pDnodes, &res);
+    return catalogGetDnodeList((SArray**)&res.pRes);
+  }
+
   uint64_t                      id_;
   std::unique_ptr<TableBuilder> builder_;
   DbMetaCache                   meta_;