yiisoft/yii2 · error · yii\base\NotSupportedException

Connection does not support reading schema information for '

Error message

Connection does not support reading schema information for '$driver' DBMS.

What it means

Error "Connection does not support reading schema information for '$driver' DBMS." thrown in yiisoft/yii2.

Source

Thrown at framework/db/Connection.php:878

     */
    public function getSchema()
    {
        if ($this->_schema !== null) {
            return $this->_schema;
        }

        $driver = $this->getDriverName();
        if (isset($this->schemaMap[$driver])) {
            $config = !is_array($this->schemaMap[$driver]) ? ['class' => $this->schemaMap[$driver]] : $this->schemaMap[$driver];
            $config['db'] = $this;

            $this->_schema = Yii::createObject($config);
            $this->restoreQueryBuilderConfiguration();

            return $this->_schema;
        }

        throw new NotSupportedException("Connection does not support reading schema information for '$driver' DBMS.");
    }

    /**
     * Returns the query builder for the current DB connection.
     * @return TQueryBuilder the query builder for the current DB connection.
     */
    public function getQueryBuilder()
    {
        return $this->getSchema()->getQueryBuilder();
    }

    /**
     * Can be used to set [[QueryBuilder]] configuration via Connection configuration array.
     *
     * @param array $value the [[QueryBuilder]] properties to be configured.
     * @since 2.0.14
     */
    public function setQueryBuilder($value)

View on GitHub (pinned to 66f00d18a2)

When it happens

Trigger: Thrown at framework/db/Connection.php:878 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of yiisoft/yii2@66f00d18a2 (2026-08-17). Data as JSON: /api/errors/a412d8071fe60d8b. Report an issue: GitHub.