Postgres and Open Source Experts

by Hari Kiran

August 22, 2023

Data replication is an essential aspect of modern database management systems, ensuring data availability, fault tolerance, and scalability. In the PostgreSQL world, a groundbreaking extension called Spock has emerged, transforming the way multi-active replication is handled. Spock, based on the pglogical logical replication tool, brings in a host of new features, including conflict resolution and avoidance, asynchronous replication, and more. In this blog post, …

To use Postgres image in Docker, run Postgres container using this image. For Docker compose file, define services in compose file and run Postgres container.

LAST_VALUE() is one of the Window functions in Postgres that retrieves the last value in the sorted partition/window of a result set.

JSONB_SET() accepts a new value, a JSONB value, and a path as arguments, and inserts the new value at the specified path within the targeted JSONB value.

FIRST_VALUE() is one of the Window functions in Postgres that retrieves the first value in the sorted partition of a result set.

In PostgreSQL, a built-in function named “JSONB_ARRAY_LENGTH()” is used to determine the length of a JSONB array.

JSON_TYPEOF() is a built-in JSON function that accepts any valid SQL value and retrieves its data type in text format.

In PostgreSQL, the TO_JSONB() is a built-in JSON function that accepts any SQL value as an argument and converts it to JSONB format.

In PostgreSQL, the ROW_TO_JSON() is a built-in JSON function that accepts any valid SQL composite type value and converts it into a JSON object.

In PostgreSQL, the TO_JSON() is a built-in JSON function that accepts any SQL value as an argument and converts it to JSON format.