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10 changes: 10 additions & 0 deletions UPGRADE.md
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The class `Doctrine\ORM\Mapping\Driver\DatabaseDriver` is deprecated without replacement.

## Add `Doctrine\ORM\Query\OutputWalker` interface, deprecate `Doctrine\ORM\Query\SqlWalker::getExecutor()`

Output walkers should implement the new `\Doctrine\ORM\Query\OutputWalker` interface and create
`Doctrine\ORM\Query\Exec\SqlFinalizer` instances instead of `Doctrine\ORM\Query\Exec\AbstractSqlExecutor`s.
The output walker must not base its workings on the query `firstResult`/`maxResult` values, so that the
`SqlFinalizer` can be kept in the query cache and used regardless of the actual `firstResult`/`maxResult` values.
Any operation dependent on `firstResult`/`maxResult` should take place within the `SqlFinalizer::createExecutor()`
method. Details can be found at https://github.com/doctrine/orm/pull/11188.


# Upgrade to 3.2

## Deprecate the `NotSupported` exception
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