CREATE TABLE session (
    id           TEXT PRIMARY KEY,
    project_id   TEXT NOT NULL,
    parent_id    TEXT,
    slug         TEXT NOT NULL,
    directory    TEXT NOT NULL,
    title        TEXT NOT NULL,
    version      TEXT NOT NULL,
    time_created INTEGER NOT NULL,
    time_updated INTEGER NOT NULL
);

CREATE TABLE message (
    id           TEXT PRIMARY KEY,
    session_id   TEXT NOT NULL,
    time_created INTEGER NOT NULL,
    time_updated INTEGER NOT NULL,
    data         TEXT NOT NULL
);

CREATE TABLE part (
    id           TEXT PRIMARY KEY,
    message_id   TEXT NOT NULL,
    session_id   TEXT NOT NULL,
    time_created INTEGER NOT NULL,
    time_updated INTEGER NOT NULL,
    data         TEXT NOT NULL
);

CREATE INDEX part_session_idx ON part (session_id);
CREATE INDEX session_project_idx ON session (project_id);