422 merge db tool

scripts/merge_db.py

@@ -0,0 +1,32 @@
+import plyvel
+import sys
+
+def merge_databases(source_db_paths, target_db_path):
+    try:
+        target_db = plyvel.DB(target_db_path, create_if_missing=True)
+
+        with target_db.write_batch() as batch:
+            for source_db_path in source_db_paths:
+                source_db = plyvel.DB(source_db_path, create_if_missing=False)
+                for key, value in source_db:
+                    batch.put(key, value)
+                source_db.close()
+
+        print("Merge successful!")
+
+    except Exception as e:
+        print("Error:", e)
+
+    finally:
+        if target_db:
+            target_db.close()
+
+if __name__ == "__main__":
+    if len(sys.argv) < 4:
+        print("Usage: python merge_leveldb.py source_db_path1 source_db_path2 ... target_db_path")
+        sys.exit(1)
+
+    source_db_paths = sys.argv[1:-1]
+    target_db_path = sys.argv[-1]
+
+    merge_databases(source_db_paths, target_db_path)