Enable allow_vertical_merges_from_compact_to_wide_parts by default

src/Storages/MergeTree/MergeTreeSettings.h

@@ -160,7 +160,7 @@ struct Settings;
     M(UInt64, min_marks_to_honor_max_concurrent_queries, 0, "Minimal number of marks to honor the MergeTree-level's max_concurrent_queries (0 - disabled). Queries will still be limited by other max_concurrent_queries settings.", 0) \
     M(UInt64, min_bytes_to_rebalance_partition_over_jbod, 0, "Minimal amount of bytes to enable part rebalance over JBOD array (0 - disabled).", 0) \
     M(Bool, check_sample_column_is_correct, true, "Check columns or columns by hash for sampling are unsigned integer.", 0) \
-    M(Bool, allow_vertical_merges_from_compact_to_wide_parts, false, "Allows vertical merges from compact to wide parts. This settings must have the same value on all replicas", 0) \
+    M(Bool, allow_vertical_merges_from_compact_to_wide_parts, true, "Allows vertical merges from compact to wide parts. This settings must have the same value on all replicas", 0) \
     M(Bool, enable_the_endpoint_id_with_zookeeper_name_prefix, false, "Enable the endpoint id with zookeeper name prefix for the replicated merge tree table", 0) \
     M(UInt64, zero_copy_merge_mutation_min_parts_size_sleep_before_lock, 1ULL * 1024 * 1024 * 1024, "If zero copy replication is enabled sleep random amount of time before trying to lock depending on parts size for merge or mutation", 0) \
     \
@@ -169,8 +169,9 @@ struct Settings;
     M(UInt64, part_moves_between_shards_delay_seconds, 30, "Time to wait before/after moving parts between shards.", 0) \
     M(Bool, use_metadata_cache, false, "Experimental feature to speed up parts loading process by using MergeTree metadata cache", 0) \
     M(Bool, allow_remote_fs_zero_copy_replication, false, "Don't use this setting in production, because it is not ready.", 0) \
-    M(String, remote_fs_zero_copy_zookeeper_path, "/clickhouse/zero_copy", "ZooKeeper path for Zero-copy table-independet info.", 0) \
+    M(String, remote_fs_zero_copy_zookeeper_path, "/clickhouse/zero_copy", "ZooKeeper path for zero-copy table-independent info.", 0) \
     M(Bool, remote_fs_zero_copy_path_compatible_mode, false, "Run zero-copy in compatible mode during conversion process.", 0) \
+    \
     /** Compress marks and primary key. */ \
     M(Bool, compress_marks, true, "Marks support compression, reduce mark file size and speed up network transmission.", 0) \
     M(Bool, compress_primary_key, true, "Primary key support compression, reduce primary key file size and speed up network transmission.", 0) \

tests/integration/test_backward_compatibility/configs/no_allow_vertical_merges_from_compact_to_wide_parts.xml

@@ -0,0 +1,5 @@
+<clickhouse>
+    <merge_tree>
+        <allow_vertical_merges_from_compact_to_wide_parts>0</allow_vertical_merges_from_compact_to_wide_parts>
+    </merge_tree>
+</clickhouse>

tests/integration/test_backward_compatibility/test_vertical_merges_from_compact_parts.py

@@ -15,7 +15,10 @@
 )
 node_new = cluster.add_instance(
     "node2",
-    main_configs=["configs/no_compress_marks.xml"],
+    main_configs=[
+        "configs/no_compress_marks.xml",
+        "configs/no_allow_vertical_merges_from_compact_to_wide_parts.xml",
+    ],
     with_zookeeper=True,
     stay_alive=True,
     allow_analyzer=False,