backend mysql

["DINH V. Hoa" <dinh@enseirb.fr>]

insert into ldap_oc_mappings (id,name,keytbl,keycol,create_proc,delete_proc,expect_return)
values (1,'inetOrgPerson','persons','id',"insert into persons (name) values ('');\n select last_insert_id();",NULL,0);

Some informations are not given in the backsql documentation.
I wonder where create_proc and delete_proc are used.
I wonder what is expect_return.

insert into ldap_attr_mappings (id,oc_map_id,name,sel_expr,from_tbls,join_where,add_proc,delete_proc,param_order,expect_return)
values (1,1,'cn','persons.name','persons',NULL,NULL,NULL,3,0);

Here, the same for add_proc and delete_proc.
I wonder what is param_order and expect_return.

Thanks.