diff --git a/src/memos/graph_dbs/neo4j.py b/src/memos/graph_dbs/neo4j.py
index 88b95b536..126e974a3 100644
--- a/src/memos/graph_dbs/neo4j.py
+++ b/src/memos/graph_dbs/neo4j.py
@@ -1588,7 +1588,7 @@ def delete_node_by_prams(
                 file_id_and_conditions.append(f"${param_name} IN n.file_ids")
             if file_id_and_conditions:
                 # Use AND to require all file_ids to be present
-                where_clauses.append(f"({' AND '.join(file_id_and_conditions)})")
+                where_clauses.append(f"({' OR '.join(file_id_and_conditions)})")
 
         # Query nodes by filter if provided
         filter_ids = []
diff --git a/src/memos/graph_dbs/neo4j_community.py b/src/memos/graph_dbs/neo4j_community.py
index ff7d5f50b..e943616da 100644
--- a/src/memos/graph_dbs/neo4j_community.py
+++ b/src/memos/graph_dbs/neo4j_community.py
@@ -706,6 +706,136 @@ def build_filter_condition(
             result = session.run(query, params)
             return [record["id"] for record in result]
 
+    def delete_node_by_prams(
+        self,
+        writable_cube_ids: list[str],
+        memory_ids: list[str] | None = None,
+        file_ids: list[str] | None = None,
+        filter: dict | None = None,
+    ) -> int:
+        """
+        Delete nodes by memory_ids, file_ids, or filter.
+
+        Args:
+            writable_cube_ids (list[str]): List of cube IDs (user_name) to filter nodes. Required parameter.
+            memory_ids (list[str], optional): List of memory node IDs to delete.
+            file_ids (list[str], optional): List of file node IDs to delete.
+            filter (dict, optional): Filter dictionary to query matching nodes for deletion.
+
+        Returns:
+            int: Number of nodes deleted.
+        """
+        logger.info(
+            f"[delete_node_by_prams] memory_ids: {memory_ids}, file_ids: {file_ids}, filter: {filter}, writable_cube_ids: {writable_cube_ids}"
+        )
+        print(
+            f"[delete_node_by_prams] memory_ids: {memory_ids}, file_ids: {file_ids}, filter: {filter}, writable_cube_ids: {writable_cube_ids}"
+        )
+
+        # Validate writable_cube_ids
+        if not writable_cube_ids or len(writable_cube_ids) == 0:
+            raise ValueError("writable_cube_ids is required and cannot be empty")
+
+        # Build WHERE conditions separately for memory_ids and file_ids
+        where_clauses = []
+        params = {}
+
+        # Build user_name condition from writable_cube_ids (OR relationship - match any cube_id)
+        user_name_conditions = []
+        for idx, cube_id in enumerate(writable_cube_ids):
+            param_name = f"cube_id_{idx}"
+            user_name_conditions.append(f"n.user_name = ${param_name}")
+            params[param_name] = cube_id
+
+        # Handle memory_ids: query n.id
+        if memory_ids and len(memory_ids) > 0:
+            where_clauses.append("n.id IN $memory_ids")
+            params["memory_ids"] = memory_ids
+
+        # Handle file_ids: query n.file_ids field
+        # All file_ids must be present in the array field (AND relationship)
+        if file_ids and len(file_ids) > 0:
+            file_id_and_conditions = []
+            for idx, file_id in enumerate(file_ids):
+                param_name = f"file_id_{idx}"
+                params[param_name] = file_id
+                # Check if this file_id is in the file_ids array field
+                file_id_and_conditions.append(f"${param_name} IN n.file_ids")
+            if file_id_and_conditions:
+                # Use AND to require all file_ids to be present
+                where_clauses.append(f"({' AND '.join(file_id_and_conditions)})")
+
+        # Query nodes by filter if provided
+        filter_ids = []
+        if filter:
+            # Use get_by_metadata with empty filters list and filter
+            filter_ids = self.get_by_metadata(
+                filters=[],
+                user_name=None,
+                filter=filter,
+                knowledgebase_ids=writable_cube_ids,
+            )
+
+        # If filter returned IDs, add condition for them
+        if filter_ids:
+            where_clauses.append("n.id IN $filter_ids")
+            params["filter_ids"] = filter_ids
+
+        # If no conditions (except user_name), return 0
+        if not where_clauses:
+            logger.warning(
+                "[delete_node_by_prams] No nodes to delete (no memory_ids, file_ids, or filter provided)"
+            )
+            return 0
+
+        # Build WHERE clause
+        # First, combine memory_ids, file_ids, and filter conditions with OR (any condition can match)
+        data_conditions = " OR ".join([f"({clause})" for clause in where_clauses])
+
+        # Then, combine with user_name condition using AND (must match user_name AND one of the data conditions)
+        user_name_where = " OR ".join(user_name_conditions)
+        ids_where = f"({user_name_where}) AND ({data_conditions})"
+
+        logger.info(
+            f"[delete_node_by_prams] Deleting nodes - memory_ids: {memory_ids}, file_ids: {file_ids}, filter: {filter}"
+        )
+        print(
+            f"[delete_node_by_prams] Deleting nodes - memory_ids: {memory_ids}, file_ids: {file_ids}, filter: {filter}"
+        )
+
+        # First count matching nodes to get accurate count
+        count_query = f"MATCH (n:Memory) WHERE {ids_where} RETURN count(n) AS node_count"
+        logger.info(f"[delete_node_by_prams] count_query: {count_query}")
+        print(f"[delete_node_by_prams] count_query: {count_query}")
+
+        # Then delete nodes
+        delete_query = f"MATCH (n:Memory) WHERE {ids_where} DETACH DELETE n"
+        logger.info(f"[delete_node_by_prams] delete_query: {delete_query}")
+        print(f"[delete_node_by_prams] delete_query: {delete_query}")
+        print(f"[delete_node_by_prams] params: {params}")
+
+        deleted_count = 0
+        try:
+            with self.driver.session(database=self.db_name) as session:
+                # Count nodes before deletion
+                count_result = session.run(count_query, **params)
+                count_record = count_result.single()
+                expected_count = 0
+                if count_record:
+                    expected_count = count_record["node_count"] or 0
+
+                # Delete nodes
+                session.run(delete_query, **params)
+                # Use the count from before deletion as the actual deleted count
+                deleted_count = expected_count
+
+        except Exception as e:
+            logger.error(f"[delete_node_by_prams] Failed to delete nodes: {e}", exc_info=True)
+            raise
+
+        logger.info(f"[delete_node_by_prams] Successfully deleted {deleted_count} nodes")
+        return deleted_count
+
     def clear(self, user_name: str | None = None) -> None:
         """
         Clear the entire graph if the target database exists.
diff --git a/src/memos/graph_dbs/polardb.py b/src/memos/graph_dbs/polardb.py
index 638eac9c2..d3dc1b4f9 100644
--- a/src/memos/graph_dbs/polardb.py
+++ b/src/memos/graph_dbs/polardb.py
@@ -4113,6 +4113,7 @@ def parse_filter(
             "memory_type",
             "node_type",
             "info",
+            "source",
         }
 
         def process_condition(condition):
@@ -4216,7 +4217,7 @@ def delete_node_by_prams(
                 file_id_and_conditions.append(f"'{escaped_id}' IN n.file_ids")
             if file_id_and_conditions:
                 # Use AND to require all file_ids to be present
-                where_conditions.append(f"({' AND '.join(file_id_and_conditions)})")
+                where_conditions.append(f"({' OR '.join(file_id_and_conditions)})")
 
         # Query nodes by filter if provided
         filter_ids = set()