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create or replace function pgq_ext.is_event_done(
a_consumer text,
a_batch_id bigint, a_event_id bigint)
returns boolean as $$
declare
res bigint;
begin
perform 1 from pgq_ext.completed_event
where consumer_id = a_consumer
and batch_id = a_batch_id
and event_id = a_event_id;
return found;
end;
$$ language plpgsql security definer;
create or replace function pgq_ext.set_event_done(
a_consumer text, a_batch_id bigint, a_event_id bigint)
returns boolean as $$
declare
old_batch bigint;
begin
-- check if done
perform 1 from pgq_ext.completed_event
where consumer_id = a_consumer
and batch_id = a_batch_id
and event_id = a_event_id;
if found then
return false;
end if;
-- if batch changed, do cleanup
select cur_batch_id into old_batch
from pgq_ext.partial_batch
where consumer_id = a_consumer;
if not found then
-- first time here
insert into pgq_ext.partial_batch
(consumer_id, cur_batch_id)
values (a_consumer, a_batch_id);
elsif old_batch <> a_batch_id then
-- batch changed, that means old is finished on queue db
-- thus the tagged events are not needed anymore
delete from pgq_ext.completed_event
where consumer_id = a_consumer
and batch_id = old_batch;
-- remember current one
update pgq_ext.partial_batch
set cur_batch_id = a_batch_id
where consumer_id = a_consumer;
end if;
-- tag as done
insert into pgq_ext.completed_event (consumer_id, batch_id, event_id)
values (a_consumer, a_batch_id, a_event_id);
return true;
end;
$$ language plpgsql security definer;
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