We encountered problem, during upgrade to newest version.
INSERTs suddenly stopped working., after some digging, we found following:

1. INSERTs on their own work correctly
2. problem is when trying to get lastInsertId()
   Nette\Database\Selection::764

$primaryKey = $this->context->getInsertId(
    !empty($primarySequenceName)
        ? $this->context->getConnection()->getSupplementalDriver()->delimite($primarySequenceName)
        : $primarySequenceName
);

3. This throws following error: SQLSTATE[42P01]: Undefined table: 7 ERROR: relation "web.product_id_seq" does not exist
4. When I modified delimite function to work same way as delimiteFQN function in PgSqlDriver, all problems disappeared.

Solution
In identifier names should'nt be any . characters. Move delimiteFQN logic into delimite function.
When asking for delimition of not FQN identifier, it won't cause any problem.