What is UUID OSSP extension?
The uuid-ossp module provides functions to generate universally unique identifiers (UUIDs) using one of several standard algorithms. There are also functions to produce certain special UUID constants.
What are Postgres extensions?
PostgreSQL extension functionality allows for bundling multiple SQL objects together in a single package that can be loaded or removed from your database. Once you load it into your database, extensions can function as built-in features.
What algorithm does BCrypt use?
Blowfish block cipher cryptomatic algorithm
BCrypt is based on the Blowfish block cipher cryptomatic algorithm and takes the form of an adaptive hash function.
Is Pgcrypto secure?
The message is encrypted with a symmetric key. The message is public-key encrypted, but the key ID has been removed. That means you will need to try all your secret keys on it to see which one decrypts it. pgcrypto itself does not produce such messages.
What is the UUID function in PostgreSQL?
PostgreSQL includes one function to generate a UUID: gen_random_uuid () → uuid. This function returns a version 4 (random) UUID. This is the most commonly used type of UUID and is appropriate for most applications. The uuid-ossp module provides additional functions that implement other standard algorithms for generating UUIDs.
How to install the UUID-OSSP module in PostgreSQL?
To install the uuid-ossp module, you use the CREATE EXTENSION statement as follows: CREATE EXTENSION IF NOT EXISTS “uuid-ossp” ; Code language: SQL (Structured Query Language) (sql) The IF NOT EXISTS clause allows you to avoid re-installing the module.
How to promote varchar to UUID in PostgreSQL?
You might need to add explicit type casts. So we need to create a CAST. This promotes varchar to uuid when needed. Though you could go the other way if you really wanted. If you do this you need to create the cast (uuid AS text).
What kind of Uuid do I need for pgcrypto?
Note: If you only need randomly-generated (version 4) UUIDs, consider using the gen_random_uuid () function from the pgcrypto module instead. This function returns a version 4 (random) UUID. This is the most commonly used type of UUID and is appropriate for most applications.