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supabase/apps/docs/content/guides/queues/api.mdx

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---
title: API
---
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When you create a Queue in Supabase, you can choose to create helper database functions in the `pgmq_public` schema. This schema exposes operations to manage Queue Messages to consumers client-side, but does not expose functions for creating or dropping Queues.
Database functions in `pgmq_public` can be exposed via Supabase Data API so consumers client-side can call them. Visit the [Quickstart](/docs/guides/queues/quickstart) for an example.
### `pgmq_public.pop(queue_name)`
Retrieves the next available message and deletes it from the specified Queue.
- `queue_name` (`text`): Queue name
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### `pgmq_public.send(queue_name, message, sleep_seconds)`
Adds a Message to the specified Queue, optionally delaying its visibility to all consumers by a number of seconds.
- `queue_name` (`text`): Queue name
- `message` (`jsonb`): Message payload to send
- `sleep_seconds` (`integer`, optional): Delay message visibility by specified seconds. Defaults to 0
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### `pgmq_public.send_batch(queue_name, messages, sleep_seconds)`
Adds a batch of Messages to the specified Queue, optionally delaying their availability to all consumers by a number of seconds.
- `queue_name` (`text`): Queue name
- `messages` (`jsonb[]`): Array of message payloads to send
- `sleep_seconds` (`integer`, optional): Delay messages visibility by specified seconds. Defaults to 0
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### `pgmq_public.archive(queue_name, message_id)`
Archives a Message by moving it from the Queue table to the Queue's archive table.
- `queue_name` (`text`): Queue name
- `message_id` (`bigint`): ID of the Message to archive
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### `pgmq_public.delete(queue_name, message_id)`
Permanently deletes a Message from the specified Queue.
- `queue_name` (`text`): Queue name
- `message_id` (`bigint`): ID of the Message to delete
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### `pgmq_public.read(queue_name, sleep_seconds, n)`
Reads up to "n" Messages from the specified Queue with an optional "sleep_seconds" (visibility timeout).
- `queue_name` (`text`): Queue name
- `sleep_seconds` (`integer`): Visibility timeout in seconds
- `n` (`integer`): Maximum number of Messages to read