From b702af8ac08d2d2b7ebdf84b603268557412dc9c Mon Sep 17 00:00:00 2001
From: Jussi Saurio <jussi.saurio@gmail.com>
Date: Wed, 24 Sep 2025 08:05:53 +0300
Subject: [PATCH] mvcc: add truncate method to logical log

---
 core/mvcc/persistent_storage/logical_log.rs | 11 +++++++++++
 core/mvcc/persistent_storage/mod.rs         |  4 ++++
 2 files changed, 15 insertions(+)

diff --git a/core/mvcc/persistent_storage/logical_log.rs b/core/mvcc/persistent_storage/logical_log.rs
index 1ba1a07d1..a2b2f50c9 100644
--- a/core/mvcc/persistent_storage/logical_log.rs
+++ b/core/mvcc/persistent_storage/logical_log.rs
@@ -184,4 +184,15 @@ impl LogicalLog {
         let c = self.file.sync(completion)?;
         Ok(IOResult::IO(IOCompletions::Single(c)))
     }
+
+    pub fn truncate(&mut self) -> Result<IOResult<()>> {
+        let completion = Completion::new_trunc(move |result| {
+            if let Err(err) = result {
+                tracing::error!("logical_log_truncate failed: {}", err);
+            }
+        });
+        let c = self.file.truncate(0, completion)?;
+        self.offset = 0;
+        Ok(IOResult::IO(IOCompletions::Single(c)))
+    }
 }
diff --git a/core/mvcc/persistent_storage/mod.rs b/core/mvcc/persistent_storage/mod.rs
index cfe977a5f..58af1b849 100644
--- a/core/mvcc/persistent_storage/mod.rs
+++ b/core/mvcc/persistent_storage/mod.rs
@@ -31,6 +31,10 @@ impl Storage {
     pub fn sync(&self) -> Result<IOResult<()>> {
         self.logical_log.write().unwrap().sync()
     }
+
+    pub fn truncate(&self) -> Result<IOResult<()>> {
+        self.logical_log.write().unwrap().truncate()
+    }
 }
 
 impl Debug for Storage {