bug: `postgres: unexpected number of rows: 1`

- Db url: `postgres://postgres:foo@localhost:5432/postgres?search_path=public&sslmode=disable`
- Cmd: `entimport -dsn`
- Postgres Server: 16.3 (Docker)
- SQL: 
```sql
CREATE TABLE IF NOT EXISTS foo(
    ID UUID UNIQUE DEFAULT GEN_RANDOM_UUID(),
    name VARCHAR(255) NOT NULL,
    PRIMARY KEY(ID)
);
```