---
title: "Breaking: #82421 - Dropped old DB related configuration options"
manual: "TYPO3 Core Changelog"
version: "main"
permalink: "https://docs.typo3.org/permalink/changelog:breaking-82421"
source: "Changelog/9.0/Breaking-82421-DroppedOldDBRelatedConfigurationOptions.rst"
typo3-version: "9.0"
typo3-major: 9
type: "breaking"
issue: 82421
forge: "https://forge.typo3.org/issues/82421"
tags: ["Database", "LocalConfiguration", "PHP-API", "FullyScanned"]
rendered: "2026-09-20T18:31:11+00:00"
---

# Breaking: #82421 - Dropped old DB related configuration options {#breaking-82421}

See [forge#82421](https://forge.typo3.org/issues/82421)

## Description {#description}

Some configuration options related to pre-doctrine era have been removed
from `$GLOBALS['TYPO3_CONF_VARS']`:

-   `SYS/sqlDebug` \- Obsolete since core version 8, no substitution
-   `SYS/setDBinit` \- Obsolete since core version 8 and migrated automatically
-   `SYS/no_pconnect` \- Obsolete since core version 8 and migrated automatically
-   `SYS/dbClientCompress` \- Obsolete since core version 8 and migrated automatically

## Impact {#impact}

Extension code usually shouldn't rely on these settings.

## Affected Installations {#affected-installations}

Instances with extension code using these array entries in `$GLOBALS['TYPO3_CONF_VARS']`
are found by the install tool extension scanner.

## Migration {#migration}

Extension code should not rely on these core framework internal settings.