grant table privileges

DECLARE
BEGIN
FOR x in (SELECT owner, table_name FROM all_tables WHERE OWNER IN('user1'))
LOOP
EXECUTE IMMEDIATE 'GRANT SELECT ON ' || x.owner || '.' || x.table_name || ' TO user2';
EXECUTE IMMEDIATE 'GRANT INSERT ON ' || x.owner || '.' || x.table_name || ' TO user2';
EXECUTE IMMEDIATE 'GRANT UPDATE ON ' || x.owner || '.' || x.table_name || ' TO user2';
EXECUTE IMMEDIATE 'GRANT DELETE ON ' || x.owner || '.' || x.table_name || ' TO user2';
EXECUTE IMMEDIATE 'GRANT ALTER ON ' || x.owner || '.' || x.table_name || ' TO user2';
EXECUTE IMMEDIATE 'GRANT INDEX ON ' || x.owner || '.' || x.table_name || ' TO user2';
EXECUTE IMMEDIATE 'GRANT REFERENCES ON ' || x.owner || '.' || x.table_name || ' TO user2';

END LOOP;
END;