to_uuidv7_boundary()

Create a UUIDv7 object from a Postgres timestamp for use in range queries.

ts is converted to a UNIX timestamp split into millisecond and sub-millisecond parts.

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The random bits of the UUID are set to zero in order to create a "lower" boundary UUID.

For example, you can use the returned UUIDvs to find all rows with UUIDs where the timestamp is less than the boundary UUID's timestamp.

• Create a boundary UUID from a timestamp:

  postgres=# SELECT to_uuidv7_boundary('2025-09-04 11:01');

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  Returns something like:

  to_uuidv7_boundary
  --------------------------------------
   019913f5-30e0-7000-8000-000000000000

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• Use a boundary UUID to find all UUIDs with a timestamp below '2025-09-04 10:00':

  SELECT * FROM uuid_events WHERE event_id < to_uuidv7_boundary('2025-09-04 10:00');

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