clean graph with cleaning data folder (#4215)

.changelog/4215.yml

@@ -0,0 +1,4 @@
+changes:
+- description: Fixed an issue where the graph was not fully cleaned before import in **graph update**
+  type: fix
+pr_number: 4215

demisto_sdk/commands/content_graph/interface/neo4j/neo4j_graph.py

@@ -55,6 +55,7 @@
 from demisto_sdk.commands.content_graph.interface.neo4j.queries.relationships import (
     _match_relationships,
     create_relationships,
+    delete_all_graph_relationships,
     get_sources_by_path,
     get_targets_by_path,
 )
@@ -663,6 +664,7 @@ def export_graph(
 
     def clean_graph(self):
         with self.driver.session() as session:
+            session.execute_write(delete_all_graph_relationships)
             session.execute_write(delete_all_graph_nodes)
         self._id_to_obj = {}
 

demisto_sdk/commands/content_graph/interface/neo4j/queries/nodes.py

@@ -255,9 +255,12 @@ def get_list_properties(tx: Transaction) -> List[str]:
 
 
 def delete_all_graph_nodes(tx: Transaction) -> None:
-    query = """// Deletes all graph nodes and relationships
-MATCH (n)
-DETACH DELETE n"""
+    query = """// Deletes all graph nodes
+        MATCH (n)
+        CALL { WITH n
+        DETACH DELETE n
+        };
+    """
     run_query(tx, query)
 
 

demisto_sdk/commands/content_graph/interface/neo4j/queries/relationships.py

@@ -421,3 +421,13 @@ def get_targets_by_path(
     minDepth
 ORDER BY content_type, object_id"""
     return run_query(tx, query).data()
+
+
+def delete_all_graph_relationships(tx: Transaction) -> None:
+    query = """// Deletes all graph relationships
+        MATCH ()-[r]->()
+        CALL { WITH r
+        DELETE r
+        };
+    """
+    run_query(tx, query)