feat all: add new ydb::TransactionMode values

commit_hash:081028e6f7bcc75ffc67494219a5a0c71ae57e0d

Author: romankoshelev

ydb/include/userver/ydb/settings.hpp

@@ -13,7 +13,7 @@ USERVER_NAMESPACE_BEGIN
 
 namespace ydb {
 
-enum class TransactionMode { kSerializableRW, kOnlineRO, kStaleRO };
+enum class TransactionMode { kSerializableRW, kOnlineRO, kStaleRO, kSnapshotRO, kSnapshotRW };
 
 struct OperationSettings final {
     std::optional<std::uint32_t> retries{std::nullopt};

ydb/src/ydb/table.cpp

@@ -29,6 +29,12 @@ NYdb::NTable::TTxSettings PrepareTxSettings(const OperationSettings& settings) {
         case TransactionMode::kStaleRO: {
             return NYdb::NTable::TTxSettings::StaleRO();
         }
+        case TransactionMode::kSnapshotRO: {
+            return NYdb::NTable::TTxSettings::SnapshotRO();
+        }
+        case TransactionMode::kSnapshotRW: {
+            return NYdb::NTable::TTxSettings::SnapshotRW();
+        }
     }
 }
 
@@ -43,6 +49,12 @@ NYdb::NQuery::TTxSettings PrepareQueryTxSettings(const OperationSettings& settin
         case TransactionMode::kStaleRO: {
             return NYdb::NQuery::TTxSettings::StaleRO();
         }
+        case TransactionMode::kSnapshotRO: {
+            return NYdb::NQuery::TTxSettings::SnapshotRO();
+        }
+        case TransactionMode::kSnapshotRW: {
+            return NYdb::NQuery::TTxSettings::SnapshotRW();
+        }
     }
 }