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sqlite-ulid Documentation

A full reference to every function and module that sqlite-ulid offers.

As a reminder, sqlite-ulid follows semver and is pre v1, so breaking changes are to be expected.

API Reference

ulid([id])

When no arguments are given, then ulid() generates a new lower-cased 26-character ULID string.

select ulid(); -- '01gqrdes0hyscqpxf1yjm6m3r9'
select ulid(); -- '01gqrdeseemx2mwnfg932phz1k'
select ulid(); -- '01gqrdessdnxd9pf2p2vp3jfpp'

If the id argument is given, it is assumed that it's a BLOB return from the ulid_bytes() function. Then it'll return the TEXT representation of that BLOB, which is typically more human-readable at the expense of slightly more storage (26 bytes vs 10).

select ulid(ulid_bytes()); -- '01gqrdr8z1z1fadk6c11zkk7cw'
select ulid(X'0185f0dc8ec7613cfa43034128935a60'); -- '01gqrds3p7c4yfmgr384m96pk0'

Keep in mind, while sqlite-ulid uses lowercase ULIDs, technically ULIDs are case-insensitive. If you're comparing or sorting text ULIDs, consider using the nocase collation for accurate results.

select '01GMP2G8ZG6PMKWYVKS62TTA41' == '01gmp2g8zg6pmkwyvks62tta41'; -- 0
select '01GMP2G8ZG6PMKWYVKS62TTA41' == '01gmp2g8zg6pmkwyvks62tta41' collate nocase; -- 1

ulid_bytes([id])

If no arguments are given, then ulid_bytes() generates a new blob ULID. This is slightly faster to generate than a string ULID, and more compact than the ulid() counterpart.

select ulid_bytes(); -- X'0185d0c5362761312e0483e4c9e3ec5d'
select ulid_bytes(); -- X'0185d0c538679350f9262bf16fd575f7'

If the id argument is given, it's assumed to be an text ULID, in which ulid_bytes() will generate the BLOB representation of that ULID.

select ulid_bytes('01gqrdes0hyscqpxf1yjm6m3r9'); -- X'0185f0d76411f6597b75e1f4a86a0f09'
select ulid_bytes('01gqrdeseemx2mwnfg932phz1k'); -- X'0185f0d765cea7454e55f048c568fc33'

Note: the id argument cannot be a ULID generated with ulid_with_prefix(), as there's no straightforward way to make a binary representation of that.

ulid_with_prefix(prefix)

Generates a new ULID string with the given prefix, with an underscore between. A nice utility to have when you want to discern the difference between multiple ULIDs of different items, like Stripe's many ID types.

select ulid_with_prefix('invoice'); -- 'invoice_01gqre8x2efy50mz28b238dh2a'
select ulid_with_prefix('invoice'); -- 'invoice_01gqre8xc36045w1qekg404g0m'

select ulid_with_prefix('cus'); -- 'cus_01gqre97xwey5jd694tkg3ncg9'
select ulid_with_prefix('card'); -- 'card_01gqre9c6az7835tdk00wc0gfp'

ulid_with_datetime(datetime)

Generates a new ULID string based on the datetime. This can be helpful for giving ULIDs to elements that already have a created time property. The input datetime should be in the YYYY-MM-DD HH:MM:SS.SSS format.

select ulid_datetime('2023-01-20 20:00:00.400'); -- '01GQ8C8FWG0W1B5H3W5304049S'

ulid_datetime(ulid)

Extract the timestamp component from the given ULID. The ulid parameter can be a string from the ulid() function, a string from the ulid_with_prefix() function, or a blob from the ulid_bytes function. Returns a text timestamp with YYYY-MM-DD HH:MM:SS.SSS format, which can be used with the builtin datetime() function.

select ulid_datetime('01GQ8C8FWG0W1B5H3W5304049S'); -- '2023-01-20 20:00:00.400'
select ulid_datetime(X'0185d0c5362761312e0483e4c9e3ec5d'); -- '2023-01-20 20:01:03.527'
select ulid_datetime('invoice_01gqre8x2efy50mz28b238dh2a'); -- '2023-01-27 01:43:01.966'

ulid_version()

Returns the semver version string of the current version of sqlite-ulid.

select ulid_version(); -- 'v0.1.0'

ulid_debug()

Returns a debug string of various info about sqlite-ulid, including the version string, build date, and commit hash.

select ulid_debug();
'Version: v0.1.0
Source: 247dca8f4cea1abdc30ed3e852c3e5b71374c177'