ba441a15cc
- Allowed adding ephemeral(ish) views and functions - Moved message_count to a concrete database field - Moved most proxy logic to a stored procedure - Moved database files around and refactored schema manager
33 lines
1.3 KiB
PL/PgSQL
33 lines
1.3 KiB
PL/PgSQL
-- SCHEMA VERSION 7: 2020-06-12
|
|
-- (in-db message count row)
|
|
|
|
-- Add message count row to members table, initialize it with the correct data
|
|
alter table members add column message_count int not null default 0;
|
|
update members set message_count = (select count(*) from messages where messages.member = members.id);
|
|
|
|
|
|
-- Create a trigger function to increment the message count on inserting to the messages table
|
|
create function trg_msgcount_increment() returns trigger as $$
|
|
begin
|
|
update members set message_count = message_count + 1 where id = NEW.member;
|
|
return NEW;
|
|
end;
|
|
$$ language plpgsql;
|
|
|
|
create trigger increment_member_message_count before insert on messages for each row execute procedure trg_msgcount_increment();
|
|
|
|
|
|
-- Create a trigger function to decrement the message count on deleting from the messages table
|
|
create function trg_msgcount_decrement() returns trigger as $$
|
|
begin
|
|
-- Don't decrement if count <= zero (shouldn't happen, but we don't want negative message counts)
|
|
update members set message_count = message_count - 1 where id = OLD.member and message_count > 0;
|
|
return OLD;
|
|
end;
|
|
$$ language plpgsql;
|
|
|
|
create trigger decrement_member_message_count before delete on messages for each row execute procedure trg_msgcount_decrement();
|
|
|
|
|
|
-- (update schema ver)
|
|
update info set schema_version = 7; |