framework/db/QueryBuilder.php
public function init()
    {
        parent::init();

        $this->expressionBuilders = array_merge($this->defaultExpressionBuilders(), $this->expressionBuilders);
        $this->conditionClasses = array_merge($this->defaultConditionClasses(), $this->conditionClasses);
    }
public function init()
    {
        parent::init();

        $this->expressionBuilders = array_merge($this->defaultExpressionBuilders(), $this->expressionBuilders);
        $this->conditionClasses = array_merge($this->defaultConditionClasses(), $this->conditionClasses);
    }
{@inheritdoc}