8 files declare their use of DatabaseException in Zircon Profile 8

Connection.php in core/lib/Drupal/Core/Database/Driver/mysql/Connection.php

Contains \Drupal\Core\Database\Driver\mysql\Connection.

DbLog.php in core/modules/dblog/src/Logger/DbLog.php

Contains \Drupal\dblog\Logger\DbLog.

FieldsOverlapException.php in core/lib/Drupal/Core/Database/Query/FieldsOverlapException.php

Contains \Drupal\Core\Database\Query\FieldsOverlapException.

InvalidMergeQueryException.php in core/lib/Drupal/Core/Database/Query/InvalidMergeQueryException.php

Contains \Drupal\Core\Database\Query\InvalidMergeQueryException.

LargeQueryTest.php in core/modules/system/src/Tests/Database/LargeQueryTest.php

Contains \Drupal\system\Tests\Database\LargeQueryTest.

NoFieldsException.php in core/lib/Drupal/Core/Database/Query/NoFieldsException.php

Contains \Drupal\Core\Database\Query\NoFieldsException.

NoUniqueFieldException.php in core/lib/Drupal/Core/Database/Query/NoUniqueFieldException.php

Contains \Drupal\Core\Database\Query\NoUniqueFieldException.

SqlContentEntityStorageSchema.php in core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorageSchema.php

Contains \Drupal\Core\Entity\Sql\SqlContentEntityStorageSchema.