Fix issue ydb-platform#9461 with altering CDC streams

ydb/core/kqp/ut/service/kqp_qs_queries_ut.cpp

@@ -3127,7 +3127,7 @@ Y_UNIT_TEST_SUITE(KqpQueryService) {
             )", NYdb::NQuery::TTxControl::BeginTx().CommitTx()).ExtractValueSync();
             UNIT_ASSERT_C(result.IsSuccess(), result.GetIssues().ToString());
         }
-        
+
         {
             auto result = client.ExecuteQuery(R"(
                 SELECT COUNT(*) FROM `/Root/DataShard` WHERE Col3 = 1;
@@ -4737,6 +4737,7 @@ Y_UNIT_TEST_SUITE(KqpQueryService) {
             CheckDirEntry(kikimr, entriesToCheck);
         }
     }
+
     Y_UNIT_TEST(CreateOrDropTopicOverTable) {
         NKikimrConfig::TAppConfig appConfig;
         appConfig.MutableTableServiceConfig()->SetEnablePreparedDdl(true);
@@ -4808,6 +4809,65 @@ Y_UNIT_TEST_SUITE(KqpQueryService) {
         }
     }
 
+    Y_UNIT_TEST(AlterCdcTopic) {
+        NKikimrConfig::TAppConfig appConfig;
+        appConfig.MutableTableServiceConfig()->SetEnablePreparedDdl(true);
+        auto setting = NKikimrKqp::TKqpSetting();
+        auto serverSettings = TKikimrSettings()
+            .SetAppConfig(appConfig)
+            .SetKqpSettings({setting});
+        TKikimrRunner kikimr{serverSettings};
+        auto tableClient = kikimr.GetTableClient();
+
+        {
+            auto tcSession = tableClient.CreateSession().GetValueSync().GetSession();
+            UNIT_ASSERT(tcSession.ExecuteSchemeQuery(R"(
+                CREATE TABLE `/Root/TmpTable` (
+                    Key Uint64,
+                    Value String,
+                    PRIMARY KEY (Key)
+                );
+            )").GetValueSync().IsSuccess());
+
+            UNIT_ASSERT(tcSession.ExecuteSchemeQuery(R"(
+                ALTER TABLE `/Root/TmpTable` ADD CHANGEFEED `feed` WITH (
+                    MODE = 'KEYS_ONLY', FORMAT = 'JSON'
+                    );
+            )").GetValueSync().IsSuccess());
+            tcSession.Close();
+        }
+
+        auto pq = NYdb::NTopic::TTopicClient(kikimr.GetDriver(),
+                                            NYdb::NTopic::TTopicClientSettings().Database("/Root").AuthToken("root@builtin"));
+
+        auto client = kikimr.GetQueryClient(NYdb::NQuery::TClientSettings{}.AuthToken("root@builtin"));
+        auto session = client.GetSession().GetValueSync().GetSession();
+        {
+
+            const auto query = Q_(R"(
+                --!syntax_v1
+                ALTER TOPIC `/Root/TmpTable/feed` ADD CONSUMER consumer21;
+            )");
+
+            RunQuery(query, session);
+            auto desc = pq.DescribeTopic("/Root/TmpTable/feed").ExtractValueSync();
+            const auto& consumers = desc.GetTopicDescription().GetConsumers();
+            UNIT_ASSERT_VALUES_EQUAL(consumers.size(), 1);
+            UNIT_ASSERT_VALUES_EQUAL(consumers[0].GetConsumerName(), "consumer21");
+
+        }
+        {
+            const auto query = Q_(R"(
+                --!syntax_v1
+                ALTER TOPIC `/Root/TmpTable/feed` SET (min_active_partitions = 10);
+            )");
+            RunQuery(query, session, false);
+            auto desc = pq.DescribeTopic("/Root/TmpTable/feed").ExtractValueSync();
+            UNIT_ASSERT_VALUES_EQUAL(desc.GetTopicDescription().GetPartitioningSettings().GetMinActivePartitions(), 1);
+        }
+
+    }
+
     Y_UNIT_TEST(TableSink_OlapRWQueries) {
         NKikimrConfig::TAppConfig appConfig;
         appConfig.MutableTableServiceConfig()->SetEnableOlapSink(true);
@@ -4914,7 +4974,7 @@ Y_UNIT_TEST_SUITE(KqpQueryService) {
             auto it = client.StreamExecuteQuery(R"sql(
                 SELECT r.Col3
                 FROM `/Root/DataShard` AS r
-                JOIN `/Root/ColumnShard` AS c 
+                JOIN `/Root/ColumnShard` AS c
                 ON r.Col1 = c.Col1;
             )sql", NYdb::NQuery::TTxControl::BeginTx().CommitTx()).ExtractValueSync();
             UNIT_ASSERT_VALUES_EQUAL_C(it.GetStatus(), EStatus::SUCCESS, it.GetIssues().ToString());

ydb/services/lib/actors/pq_schema_actor.h

@@ -548,6 +548,10 @@ namespace NKikimr::NGRpcProxy::V1 {
             return path;
         }
 
+        const TMaybe<TString>& GetCdcStreamName() const {
+            return CdcStreamName;
+        }
+
         void SendDescribeProposeRequest(bool showPrivate = false) {
             return TBase::SendDescribeProposeRequest(this->ActorContext(), showPrivate);
         }
@@ -603,6 +607,10 @@ namespace NKikimr::NGRpcProxy::V1 {
                 if (static_cast<TDerived*>(this)->IsCdcStreamCompatible()) {
                     Y_ABORT_UNLESS(response.ListNodeEntry->Children.size() == 1);
                     PrivateTopicName = response.ListNodeEntry->Children.at(0).Name;
+
+                    if (response.Self) {
+                        CdcStreamName = response.Self->Info.GetName();
+                    }
                     SendDescribeProposeRequest(true);
                     return true;
                 }
@@ -620,6 +628,8 @@ namespace NKikimr::NGRpcProxy::V1 {
         TIntrusiveConstPtr<NSchemeCache::TSchemeCacheNavigate::TPQGroupInfo> PQGroupInfo;
         TIntrusiveConstPtr<NSchemeCache::TSchemeCacheNavigate::TDirEntryInfo> Self;
         TMaybe<TString> PrivateTopicName;
+        TMaybe<TString> CdcStreamName;
+
     };
 
 }

ydb/services/persqueue_v1/actors/schema_actors.cpp

@@ -1587,7 +1587,18 @@ void TAlterTopicActorInternal::HandleCacheNavigateResponse(TEvTxProxySchemeCache
     }
     TUpdateSchemeBase::HandleCacheNavigateResponse(ev);
     auto& schemeTx = Response->Response.ModifyScheme;
-    FillModifyScheme(schemeTx, ActorContext(), GetRequest().WorkingDir, GetRequest().Name);
+    std::pair <TString, TString> pathPair;
+    try {
+        pathPair = NKikimr::NGRpcService::SplitPath(GetTopicPath());
+    } catch (const std::exception &ex) {
+        Response->Response.Issues.AddIssue(NYql::ExceptionToIssue(ex));
+        RespondWithCode(Ydb::StatusIds::BAD_REQUEST);
+        return;
+    }
+
+    const auto& workingDir = pathPair.first;
+    const auto& name = pathPair.second;
+    FillModifyScheme(schemeTx, ActorContext(), workingDir, name);
 }
 
 void TAlterTopicActorInternal::ModifyPersqueueConfig(
@@ -1601,7 +1612,7 @@ void TAlterTopicActorInternal::ModifyPersqueueConfig(
     TString error;
     Y_UNUSED(selfInfo);
 
-    auto status = FillProposeRequestImpl(GetRequest().Request, groupConfig, appData, error, false);
+    auto status = FillProposeRequestImpl(GetRequest().Request, groupConfig, appData, error, GetCdcStreamName().Defined());
     if (!error.empty()) {
         Response->Response.Issues.AddIssue(error);
     }