i have a project where inheritance could be used, i think. but after
going through the lists and having read the FM's, i realize that i beter
use another approach. i just describe the project in short :
users have to fill in forms, that mainly exists of different lists
and/or textboxes. Users are part of teams ( kind of groups) , and every
team is allowed to have its extra listitems, which should be added to
the global lists ( as i said, this could be solved with inheritance...).
The teams should be able to insert their extra listitems in a table,
without touching the global listitems. This could be solved by using a
different schema for each team, and each team has its own listitems
table. The selected items will end up in a registration table, also
specific per team.
public.listitems
id serial
id_up int
priority int2
label text
teamX.listitems
like public.listitems
teamY.listitems
like public.listitems
teamX.registration
reg_id serial
time_registration date
list_id foreign ....
i can create the composed listitems for a team by using a select and
UNION of the two tables. I am a little bit stuck how i should implement
the foreign key in the registration table as the list_id can reference a
listitem of the public schema as well of the teams schema.
1-maybe i should use triggers, and all listiteems inserts by the teams
should be inserted in the public.listitems as well
2- create a new table that consists of union of both tables
3- other solution
jef peeraer
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