Sqids (pronounced "squids") is an open-source library that lets you generate short unique identifiers from numbers. These IDs are URL-safe, can encode several numbers, and do not contain common profanity words. Read more .
This is what they look like:
Quick encode & decode example:
select sqids.encode(array[1, 2, 3], 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789', 0); -- 86Rf07
select sqids.decode('86Rf07', 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'); -- {1,2,3}
If IDs are too short, you can pad them to a certain length:
select sqids.encode(array[1, 2, 3], 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789', 10); -- 86Rf07xd4z
select sqids.decode('86Rf07xd4z', 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'); -- {1,2,3}
Create unique IDs by shuffling the alphabet:
select sqids.encode(array[1, 2, 3], 'k3G7QAe51FCsPW92uEOyq4Bg6Sp8YzVTmnU0liwDdHXLajZrfxNhobJIRcMvKt', 0); -- XRKUdQ
select sqids.decode('XRKUdQ', 'k3G7QAe51FCsPW92uEOyq4Bg6Sp8YzVTmnU0liwDdHXLajZrfxNhobJIRcMvKt'); -- {1,2,3}
Full documentation is at https://github.com/sqids/sqids-plpgsql
If you're looking for the original Hashids PLpgSQL, you can find it here: https://github.com/array-analytics/plpg_hashids
The main use of Sqids is purely visual. If you'd like to use IDs instead of numbers in your project, Sqids could be a good choice.