-- 0.6.0: how a reader reads is part of what it is.
\set VERBOSITY terse
CREATE EXTENSION pg_phasevec;
-- a pooled reader as phasevec-reader --register writes it
SELECT phasevec.reader_register('q@cpu', repeat('b', 64), 1024, NULL,
    '{"pooling": "last", "ctx": 1024, "query_prefix": "Instruct: find\nQuery: ", "tokens": "t"}',
    jsonb_build_object('backend', 'cpu', 'device', 'd', 'libs', repeat('c', 64))) > 0 AS registered;
 registered 
------------
 t
(1 row)

-- the same model asking questions another way is another reader
SELECT phasevec.reader_register('q-plain@cpu', repeat('b', 64), 1024, NULL,
    '{"pooling": "last", "ctx": 1024, "query_prefix": "", "tokens": "t"}',
    jsonb_build_object('backend', 'cpu', 'device', 'd', 'libs', repeat('c', 64))) > 0 AS another_reader;
 another_reader 
----------------
 t
(1 row)

-- and cut at another context, another again
SELECT phasevec.reader_register('q-512@cpu', repeat('b', 64), 1024, NULL,
    '{"pooling": "last", "ctx": 512, "query_prefix": "", "tokens": "t"}',
    jsonb_build_object('backend', 'cpu', 'device', 'd', 'libs', repeat('c', 64))) > 0 AS another_again;
 another_again 
---------------
 t
(1 row)

-- but the same reading under another name is refused
SELECT phasevec.reader_register('q-renamed@cpu', repeat('b', 64), 1024, NULL,
    '{"pooling": "last", "ctx": 1024, "query_prefix": "", "tokens": "t", "note": "a label is not a reader"}',
    jsonb_build_object('backend', 'cpu', 'device', 'd', 'libs', repeat('c', 64)));
ERROR:  duplicate key value violates unique constraint "readers_seal_key"
SELECT name, reads FROM phasevec.readers ORDER BY id;
    name     |                                           reads                                            
-------------+--------------------------------------------------------------------------------------------
 q@cpu       | {"ctx": 1024, "tokens": "t", "pooling": "last", "query_prefix": "Instruct: find\nQuery: "}
 q-plain@cpu | {"ctx": 1024, "tokens": "t", "pooling": "last", "query_prefix": ""}
 q-512@cpu   | {"ctx": 512, "tokens": "t", "pooling": "last", "query_prefix": ""}
(3 rows)

DROP EXTENSION pg_phasevec;