Fixes null grantor issue

src/backend/distributed/commands/role.c

@@ -1241,12 +1241,6 @@ PreprocessGrantRoleStmt(Node *node, const char *queryString,
 		return NIL;
 	}
 
-	/*
-	 * Postgres don't seem to use the grantor. Even dropping the grantor doesn't
-	 * seem to affect the membership. If this changes, we might need to add grantors
-	 * to the dependency resolution too. For now we just don't propagate it.
-	 */
-	stmt->grantor = NULL;
 	stmt->grantee_roles = distributedGranteeRoles;
 	char *sql = DeparseTreeNode((Node *) stmt);
 	stmt->grantee_roles = allGranteeRoles;

src/backend/distributed/commands/utility_hook.c

@@ -170,6 +170,12 @@ citus_ProcessUtility(PlannedStmt *pstmt,
 
 	Node *parsetree = pstmt->utilityStmt;
 
+	if (IsA(parsetree, GrantRoleStmt))
+	{
+		GrantRoleStmt *grantRoleStmt = (GrantRoleStmt *) parsetree;
+		elog(LOG, "GrantRoleStmt: ");
+	}
+
 	if (IsA(parsetree, TransactionStmt))
 	{
 		TransactionStmt *transactionStmt = (TransactionStmt *) parsetree;

src/test/regress/expected/create_role_propagation.out

@@ -252,7 +252,7 @@ SELECT result FROM run_command_on_all_nodes(
  [{"member":"dist_role_4","role":"dist_role_3","grantor":"test_admin_role","admin_option":false},     +
   {"member":"non_dist_role_3","role":"dist_role_3","grantor":"test_admin_role","admin_option":false}, +
   {"member":"test_admin_role","role":"dist_role_3","grantor":"postgres","admin_option":true}]
- [{"member":"dist_role_4","role":"dist_role_3","grantor":"postgres","admin_option":false},            +
+ [{"member":"dist_role_4","role":"dist_role_3","grantor":"test_admin_role","admin_option":false},     +
   {"member":"test_admin_role","role":"dist_role_3","grantor":"postgres","admin_option":true}]
  [{"member":"dist_role_4","role":"dist_role_3","grantor":"postgres","admin_option":false},            +
   {"member":"test_admin_role","role":"dist_role_3","grantor":"postgres","admin_option":true}]
@@ -280,6 +280,7 @@ SELECT objid::regrole FROM pg_catalog.pg_dist_object WHERE classid='pg_authid'::
 (5 rows)
 
 REVOKE dist_role_3 from non_dist_role_3 granted by test_admin_role;
+revoke dist_role_3 from test_admin_role cascade;
 drop role test_admin_role;
 \c - - - :worker_1_port
 SELECT roleid::regrole::text AS role, member::regrole::text, grantor::regrole::text, admin_option FROM pg_auth_members WHERE roleid::regrole::text LIKE '%dist\_%' ORDER BY 1, 2;

src/test/regress/sql/create_role_propagation.sql

@@ -131,6 +131,8 @@ SELECT roleid::regrole::text AS role, member::regrole::text, (grantor::regrole::
 SELECT objid::regrole FROM pg_catalog.pg_dist_object WHERE classid='pg_authid'::regclass::oid AND objid::regrole::text LIKE '%dist\_%' ORDER BY 1;
 
 REVOKE dist_role_3 from non_dist_role_3 granted by test_admin_role;
+
+revoke dist_role_3 from test_admin_role cascade;
 drop role test_admin_role;
 
 \c - - - :worker_1_port