Backport ClickHouse#92748 to 25.8: Do not attempt to delete temporary directories at startup if a MergeTree table is created over a readonly disk

Author: robot-clickhouse

src/Storages/StorageMergeTree.cpp

@@ -192,6 +192,10 @@ StorageMergeTree::StorageMergeTree(
 
 void StorageMergeTree::startup()
 {
+    /// Do not schedule any background jobs if current storage has static data files.
+    if (isStaticStorage())
+        return;
+
     clearEmptyParts();
 
     /// Temporary directories contain incomplete results of merges (after forced restart)
@@ -202,10 +206,6 @@ void StorageMergeTree::startup()
     time_after_previous_cleanup_parts.restart();
     time_after_previous_cleanup_temporary_directories.restart();
 
-    /// Do not schedule any background jobs if current storage has static data files.
-    if (isStaticStorage())
-        return;
-
     try
     {
         background_operations_assignee.start();