Remove TTL settings from backup tables KIKIMR-14874

ref:a4e4733ce371719ba70d348afbd73d12588d04ed

2 files changed, 44 insertions, 1 deletions

diff --git a/ydb/core/tx/schemeshard/schemeshard__operation_copy_table.cpp b/ydb/core/tx/schemeshard/schemeshard__operation_copy_table.cpp
index 5d1e83187f..b143938797 100644
--- a/ydb/core/tx/schemeshard/schemeshard__operation_copy_table.cpp
+++ b/ydb/core/tx/schemeshard/schemeshard__operation_copy_table.cpp
@@ -482,11 +482,17 @@ public:
         auto schema = Transaction.GetCreateTable();
         const bool omitFollowers = schema.GetOmitFollowers();
         const bool isBackup = schema.GetIsBackup();
+
         PrepareScheme(&schema, name, srcTableInfo, context);
+        schema.SetIsBackup(isBackup);
+
         if (omitFollowers) {
             schema.MutablePartitionConfig()->AddFollowerGroups()->Clear();
         }
-        schema.SetIsBackup(isBackup);
+
+        if (isBackup) {
+            schema.ClearTTLSettings();
+        }
 
         NKikimrSchemeOp::TPartitionConfig compilationPartitionConfig;
         if (!TPartitionConfigMerger::ApplyChanges(compilationPartitionConfig, srcTableInfo->PartitionConfig(), schema.GetPartitionConfig(), AppData(), errStr)
diff --git a/ydb/core/tx/schemeshard/ut_ttl.cpp b/ydb/core/tx/schemeshard/ut_ttl.cpp
index 970e7c4bb9..82a554c66e 100644
--- a/ydb/core/tx/schemeshard/ut_ttl.cpp
+++ b/ydb/core/tx/schemeshard/ut_ttl.cpp
@@ -662,6 +662,43 @@ Y_UNIT_TEST_SUITE(TSchemeShardTTLTests) {
         }
     }
 
+    Y_UNIT_TEST(BackupCopyHasNoTtlSettings) {
+        TTestBasicRuntime runtime;
+        TTestEnv env(runtime);
+        ui64 txId = 100;
+
+        TestCreateTable(runtime, ++txId, "/MyRoot", R"(
+            Name: "TTLEnabledTable"
+            Columns { Name: "key" Type: "Uint64" }
+            Columns { Name: "ts" Type: "Timestamp" }
+            KeyColumnNames: ["key"]
+            TTLSettings {
+              Enabled {
+                ColumnName: "ts"
+              }
+            }
+        )");
+        env.TestWaitNotification(runtime, txId);
+
+        TestConsistentCopyTables(runtime, ++txId, "/", R"(
+            CopyTableDescriptions {
+              SrcPath: "/MyRoot/TTLEnabledTable"
+              DstPath: "/MyRoot/TTLEnabledTableCopy"
+              IsBackup: true
+            }
+        )");
+        env.TestWaitNotification(runtime, txId);
+
+        TestDescribeResult(
+            DescribePath(runtime, "/MyRoot/TTLEnabledTableCopy"), {
+                NLs::PathExist,
+                NLs::Finished, [=] (const NKikimrScheme::TEvDescribeSchemeResult& record) {
+                    UNIT_ASSERT(!record.GetPathDescription().GetTable().HasTTLSettings());
+                }
+            }
+        );
+    }
+
     Y_UNIT_TEST(RacyAlterTableAndConditionalErase) {
         TTestBasicRuntime runtime;
         TTestEnv env(runtime);