From b3ea93c2ec01ee8b6d45a449cff96943e7677404 Mon Sep 17 00:00:00 2001
From: vlad-gogov <vlad-gogov@ydb.tech>
Date: Wed, 11 Sep 2024 14:08:54 +0300
Subject: [PATCH] added test with disabled feature flag "EnableOlapCompression"

---
 ydb/core/kqp/ut/common/kqp_ut_common.cpp |  5 ++++-
 ydb/core/kqp/ut/olap/sys_view_ut.cpp     | 11 +++++++++++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/ydb/core/kqp/ut/common/kqp_ut_common.cpp b/ydb/core/kqp/ut/common/kqp_ut_common.cpp
index a6a965850e56..1d11334e8811 100644
--- a/ydb/core/kqp/ut/common/kqp_ut_common.cpp
+++ b/ydb/core/kqp/ut/common/kqp_ut_common.cpp
@@ -133,9 +133,12 @@ TKikimrRunner::TKikimrRunner(const TKikimrSettings& settings) {
     ServerSettings->SetUseRealThreads(settings.UseRealThreads);
     ServerSettings->SetEnableTablePgTypes(true);
     ServerSettings->SetEnablePgSyntax(true);
-    ServerSettings->SetEnableOlapCompression(true);
     ServerSettings->S3ActorsFactory = settings.S3ActorsFactory;
 
+    if (!settings.FeatureFlags.HasEnableOlapCompression()) {
+        ServerSettings->SetEnableOlapCompression(true);
+    }
+
     if (settings.Storage) {
         ServerSettings->SetCustomDiskParams(*settings.Storage);
         ServerSettings->SetEnableMockOnSingleNode(false);
diff --git a/ydb/core/kqp/ut/olap/sys_view_ut.cpp b/ydb/core/kqp/ut/olap/sys_view_ut.cpp
index 27820452542e..581384ba4450 100644
--- a/ydb/core/kqp/ut/olap/sys_view_ut.cpp
+++ b/ydb/core/kqp/ut/olap/sys_view_ut.cpp
@@ -219,6 +219,17 @@ Y_UNIT_TEST_SUITE(KqpOlapSysView) {
         }
     }
 
+    Y_UNIT_TEST(DisabledAlterCompression) {
+        TKikimrSettings settings = TKikimrSettings().SetWithSampleTables(false).SetEnableOlapCompression(false);
+        TKikimrRunner kikimr(settings);
+        TTypedLocalHelper helper("", kikimr, "olapTable", "olapStore");
+        helper.CreateTestOlapTable();
+        helper.FillPKOnly(0, 1);
+        helper.ExecuteSchemeQuery(
+            "ALTER OBJECT `/Root/olapStore` (TYPE TABLESTORE) SET (ACTION=ALTER_COLUMN, NAME=pk_int, "
+            "`SERIALIZER.CLASS_NAME`=`ARROW_SERIALIZER`, `COMPRESSION.TYPE`=`zstd`);", NYdb::EStatus::PRECONDITION_FAILED);
+    }
+
     Y_UNIT_TEST(StatsSysViewBytesColumnActualization) {
         ui64 rawBytes1;
         ui64 bytes1;