Moved commit "Implementation of api which can return key_range -> nodeId mapping" from ydb repo

Author: dcherednik

include/ydb-cpp-sdk/client/table/table.h

@@ -424,6 +424,7 @@ bool operator!=(const TChangefeedDescription& lhs, const TChangefeedDescription&
 struct TPartitionStats {
     uint64_t Rows = 0;
     uint64_t Size = 0;
+    uint32_t LeaderNodeId = 0;
 };
 
 class TDateTypeColumnModeSettings {
@@ -1643,6 +1644,7 @@ struct TDescribeTableSettings : public TOperationRequestSettings<TDescribeTableS
     FLUENT_SETTING_DEFAULT(bool, WithTableStatistics, false);
     FLUENT_SETTING_DEFAULT(bool, WithPartitionStatistics, false);
     FLUENT_SETTING_DEFAULT(bool, WithSetVal, false);
+    FLUENT_SETTING_DEFAULT(bool, WithShardNodesInfo, false);
 };
 
 struct TExplainDataQuerySettings : public TOperationRequestSettings<TExplainDataQuerySettings> {

src/client/table/impl/table_client.cpp

@@ -529,6 +529,10 @@ TAsyncDescribeTableResult TTableClient::TImpl::DescribeTable(const std::string&
         request.set_include_set_val(true);
     }
 
+    if (settings.WithShardNodesInfo_) {
+        request.set_include_shard_nodes_info(true);
+    }
+
     auto promise = NewPromise<TDescribeTableResult>();
 
     auto extractor = [promise, settings]

src/client/table/table.cpp

@@ -422,7 +422,7 @@ class TTableDescription::TImpl {
 
         for (const auto& shardStats : Proto_.table_stats().partition_stats()) {
             PartitionStats_.emplace_back(
-                TPartitionStats{shardStats.rows_estimate(), shardStats.store_size()}
+                TPartitionStats{shardStats.rows_estimate(), shardStats.store_size(), shardStats.leader_node_id()}
             );
         }