How to implement automatic partitioning in PostgreSQL 15?

To implement automatic partitioning in PostgreSQL 15, you can follow these steps:

 1: Enable the necessary extensions

• First, ensure that the required extensions are enabled in your PostgreSQL installation. Specifically, enable both the pg_partman and pg_partman_bgw extensions. To do this, run the following commands as a superuser:

CREATE EXTENSION pg_partman;
CREATE EXTENSION pg_partman_bgw;

 2: Create a partitioned table

• Next, create a partitioned table using the pg_partman extension. This table will act as the parent table for your partitions. You can define the partition key and any additional columns as per your requirements. Here’s an example:

CREATE TABLE orders (
    order_id SERIAL PRIMARY KEY,
    order_date DATE,
    customer_id INT,
    -- additional columns
)
PARTITION BY RANGE (order_date);

 3: Create partition templates

• Now, you need to create partition templates for your table. Partition templates define the structure of individual partitions. You can create different templates for different ranges of values. Here’s an example:

SELECT partman.create_parent('public.orders', 'order_date', 'native', 'daily');
SELECT partman.create_interval_partition('public.orders', 'order_date', 'native', 'daily', INTERVAL '1 day', 'future');

The first command creates a template for daily partitions, while the second command creates a template for future partitions.

 4: Set up automatic partition management

• To enable automatic partitioning, you need to set up partition management jobs using the pg_partman_bgw extension. This extension provides a background worker process that automatically creates and manages partitions based on your defined templates. Here’s an example:

SELECT partman_bgw.register_bgw();

 5: Verify and monitor

• Finally, verify that automatic partitioning works correctly by checking the created partitions with this SQL query:

SELECT * FROM partman.show_partitions('public.orders');

Additionally, you can monitor the partition management process by querying the partman_bgw.bgw_log table.

That’s it! You have now implemented automatic partitioning in PostgreSQL 15 using the pg_partman and pg_partman_bgw extensions.

For any further assistance or guidance, feel free to contact our PostgreSQL experts at contact@minervadb.com or call us at (844) 588-7287.