Allow to alter cdc topic's retention period (#8264)

Author: CyberROFL

ydb/core/kqp/ut/scheme/kqp_scheme_ut.cpp

@@ -4213,6 +4213,22 @@ Y_UNIT_TEST_SUITE(KqpScheme) {
             UNIT_ASSERT_VALUES_EQUAL(desc.GetTopicDescription().GetRetentionPeriod(), TDuration::Hours(1));
         }
 
+        { // alter
+            auto query = R"(
+                --!syntax_v1
+                ALTER TOPIC `/Root/table/feed_2` SET (
+                    RETENTION_PERIOD = Interval("PT2H")
+                );
+            )";
+
+            const auto result = session.ExecuteSchemeQuery(query).GetValueSync();
+            UNIT_ASSERT_VALUES_EQUAL_C(result.GetStatus(), EStatus::SUCCESS, result.GetIssues().ToString());
+
+            auto desc = pq.DescribeTopic("/Root/table/feed_2").ExtractValueSync();
+            UNIT_ASSERT_C(desc.IsSuccess(), desc.GetIssues().ToString());
+            UNIT_ASSERT_VALUES_EQUAL(desc.GetTopicDescription().GetRetentionPeriod(), TDuration::Hours(2));
+        }
+
         { // non-positive (invalid)
             auto query = R"(
                 --!syntax_v1

ydb/core/tx/datashard/datashard_ut_change_exchange.cpp

@@ -1825,18 +1825,13 @@ Y_UNIT_TEST_SUITE(Cdc) {
             UNIT_ASSERT_VALUES_EQUAL(res.GetStatus(), NYdb::EStatus::BAD_REQUEST);
         }
 
-        // try to update retention period
-        {
-            auto res = client.AlterTopic("/Root/Table/Stream", NYdb::NTopic::TAlterTopicSettings()
-                .SetRetentionPeriod(TDuration::Hours(48))).ExtractValueSync();
-            UNIT_ASSERT_VALUES_EQUAL(res.GetStatus(), NYdb::EStatus::BAD_REQUEST);
-        }
         // try to update supported codecs
         {
             auto res = client.AlterTopic("/Root/Table/Stream", NYdb::NTopic::TAlterTopicSettings()
                 .AppendSetSupportedCodecs(NYdb::NTopic::ECodec(5))).ExtractValueSync();
             UNIT_ASSERT_VALUES_EQUAL(res.GetStatus(), NYdb::EStatus::BAD_REQUEST);
         }
+
         // try to update retention storage
         {
             auto res = client.AlterTopic("/Root/Table/Stream", NYdb::NTopic::TAlterTopicSettings()

ydb/services/lib/actors/pq_schema_actor.cpp

@@ -1321,7 +1321,6 @@ namespace NKikimr::NGRpcProxy::V1 {
         }
 
         if (request.has_set_retention_period()) {
-            CHECK_CDC;
             partConfig->SetLifetimeSeconds(request.set_retention_period().seconds());
         }