-- Oracle 26ai setup for the in-database embedding backend (port 8002)
-- Run as SYSDBA connected to FREEPDB1
--
-- Prerequisites:
--   - CLIP_TXT and CLIP_IMG ONNX model files must be present in the Oracle
--     VEC_DUMP directory before loading (see notes below)
--   - vector_memory_size must be set in SGA (512M recommended)
--
-- Usage:
--   podman exec -it oracle.free sqlplus / as sysdba

ALTER SESSION SET CONTAINER=FREEPDB1;

-- Create VECTOR user
CREATE USER vector IDENTIFIED BY Vektor;
GRANT CONNECT, RESOURCE TO vector;
GRANT UNLIMITED TABLESPACE TO vector;
GRANT READ, WRITE ON DIRECTORY VEC_DUMP TO vector;

-- Load ONNX models (run as VECTOR user or SYSDBA)
-- The .onnx files must be placed in the VEC_DUMP directory on the Oracle host
-- beforehand (typically /opt/oracle/dbs/vec_dump/ inside the container).
--
-- CLIP_TXT: text encoder using CLS-token pooling (position 0).
-- Standard CLIP exports use EOS-token pooling (ArgMax), which Oracle rejects
-- because it introduces an ArgMax node on input_ids. This model must be
-- re-exported with CLS pooling to pass Oracle's ONNX validator.
--
EXEC DBMS_VECTOR.LOAD_ONNX_MODEL('VEC_DUMP', 'clip_txt.onnx', 'CLIP_TXT',
    JSON('{"function":"embedding","embeddingOutput":"output","input":{"input":["DATA"]}}'));

EXEC DBMS_VECTOR.LOAD_ONNX_MODEL('VEC_DUMP', 'clip_img.onnx', 'CLIP_IMG',
    JSON('{"function":"embedding","embeddingOutput":"output","input":{"input":["DATA"]}}'));

-- Photo table (stores filename, image BLOB, and vector)
CREATE TABLE vector.foto_vektor (
    id        NUMBER GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
    filename  VARCHAR2(100),
    foto      BLOB,
    foto_vek  VECTOR
);

-- Grant SELECT on FOTO_VEKTOR to vectors_user so both backends share one table
-- (optional — remove if the schemas should remain isolated)
GRANT SELECT ON vector.foto_vektor TO vectors_user;

EXIT;