join - query recursive and others tables in postgresql? -


i have little problem make recursive query , can’t extract data need.

i have 3 tables (menu, type_role, privilege)

 menu ---------------------------------------------------------- | id| parent_id |    tittle      | controller | action   | | 1 |           | users          |            |          | | 2 |    1      | create user    |  users     |  create  | | 3 |    1      | edit user      |  users     |  edit    | | 4 |    1      | show users     |  users     |  show    | | 5 |           | contacts       |            |          | | 6 |    5      | create contacs |  contacts  |  create  | | 7 |    5      | edit contacts  |  contacts  |  edit    | | 8 |           | inventory      |            |          | | 9 |    8      | register piece |  pieces    | register | | 10|    8      | show pieces    |  pieces    | show     |  
 type_role --------------------- | id|    role       |      | 1 | administrator |  | 2 | technical     |  | 3 | operator      |   
 privilege --------------------- | role_id |  menu_id |      |    1    |    2     |   |    1    |    3     |  |    1    |    4     | |    1    |    6     | |    1    |    7     | |    1    |    9     |  |    1    |   10     | |    2    |    9     |  |    2    |   10     | |    3    |    6     |  |    3    |    7     | |    3    |   10     |

i need extract:

id, parent_id, controller, action id of type of role equals 1

i made query , data, query extract parents not related type of user , don't need this.

i want extract menu items , parent user type

select menu.id,menu.parent_id,menu.controller,menu.action   privilege inner join menu on menu.id = privilege.menu_id inner join type_role on  type_role.id = privilege.role_id type_role.id = 1 union select menu_recur.id,menu_recur.parent_id,menu_recur.menu_recur,menu_recur.action  menu menu_recur inner join menu menutwo on  menu_recur.id = menutwo.parent_id

i think should use recursive have not worked kind of recursive queries

here's recursive query loops parent entries.

with    recursive list         (         select  menu.id, parent_id, tittle, controller, action            menu         join    privilege         on      menu.id = privilege.menu_id         join    type_role         on      type_role.id = privilege.role_id           type_role.role = 'technical'         union         select  menu.id, menu.parent_id, menu.tittle, menu.controller, menu.action            list         join    menu         on      menu.id = list.parent_id         ) select  distinct *    list order         id ;

this prints:

 id | parent_id |     tittle     | controller |  action   ----+-----------+----------------+------------+----------   8 |           | inventory      |            |    9 |         8 | register piece | pieces     | register  10 |         8 | show pieces    | pieces     | show (3 rows)

see working @ sql fiddle. example technical, administrator includes every row.


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