9 files declare their use of DatabaseExceptionWrapper in Zircon Profile 8

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

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

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

Contains \Drupal\system\Tests\Database\ConnectionTest.

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

Contains \Drupal\system\Tests\Database\DatabaseExceptionWrapperTest.

EntityDefinitionUpdateTest.php in core/modules/system/src/Tests/Entity/EntityDefinitionUpdateTest.php

Contains \Drupal\system\Tests\Entity\EntityDefinitionUpdateTest.

Error.php in core/lib/Drupal/Core/Utility/Error.php

Contains \Drupal\Core\Utility\Error.

install.core.inc in core/includes/install.core.inc

API functions for installing Drupal.

Sql.php in core/modules/views/src/Plugin/views/query/Sql.php

Contains \Drupal\views\Plugin\views\query\Sql.

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

Contains \Drupal\Core\Entity\Sql\SqlContentEntityStorage.

ViewsSqlExceptionTest.php in core/modules/views/src/Tests/Plugin/ViewsSqlExceptionTest.php

Contains \Drupal\views\Tests\Plugin\ViewsSqlExceptionTest.