pgq

pig repo add pgdg -u          # 添加 PGDG 仓库并更新缓存

CREATE EXTENSION pgq;

CREATE EXTENSION pgq;

-- Create a queue
SELECT pgq.create_queue('myqueue');

-- Drop a queue
SELECT pgq.drop_queue('myqueue');

-- Get queue info
SELECT * FROM pgq.get_queue_info();
SELECT * FROM pgq.get_queue_info('myqueue');

-- Register a consumer on a queue
SELECT pgq.register_consumer('myqueue', 'myconsumer');

-- Unregister a consumer
SELECT pgq.unregister_consumer('myqueue', 'myconsumer');

-- Get consumer info
SELECT * FROM pgq.get_consumer_info('myqueue');

-- Insert an event into a queue
SELECT pgq.insert_event('myqueue', 'event_type', 'event_data');

-- Insert with extra fields
SELECT pgq.insert_event('myqueue', 'event_type', 'event_data',
                         'extra1', 'extra2', 'extra3', 'extra4');

-- Get the next batch of events (returns batch_id or NULL if no new batches)
SELECT pgq.next_batch('myqueue', 'myconsumer');

-- Get events from the batch
SELECT * FROM pgq.get_batch_events(:batch_id);

-- Retry a failed event (will reappear after the specified interval)
SELECT pgq.event_retry(:batch_id, :event_id, :retry_seconds);

-- Mark batch as done
SELECT pgq.finish_batch(:batch_id);

-- 1. Get next batch
SELECT pgq.next_batch('myqueue', 'myconsumer') AS batch_id;

-- 2. If batch_id is not NULL, get events
SELECT * FROM pgq.get_batch_events(:batch_id);

-- 3. Process events, retry failures
SELECT pgq.event_retry(:batch_id, :event_id, 60);

-- 4. Finish the batch
SELECT pgq.finish_batch(:batch_id);