src/Db/Conditions/SimpleConditionBuilder.php
public function build($expression, array &$params = [])
    {
        $operator = $expression->getOperator();
        $column = $expression->getColumn();
        $value = $expression->getValue();

        if (strpos($column, '(') === false) {
            $column = $this->queryBuilder->db->quoteColumnName($column);
        }

        if ($value === null) {
            return "$column $operator NULL";
        }
        if ($value instanceof ExpressionInterface) {
            return "$column $operator {$this->queryBuilder->buildExpression($value, $params)}";
        }

        $phName = $this->queryBuilder->bindParam($value, $params);
        return "$column $operator $phName";
    }
public function build($expression, array &$params = [])
    {
        $operator = $expression->getOperator();
        $column = $expression->getColumn();
        $value = $expression->getValue();

        if (strpos($column, '(') === false) {
            $column = $this->queryBuilder->db->quoteColumnName($column);
        }

        if ($value === null) {
            return "$column $operator NULL";
        }
        if ($value instanceof ExpressionInterface) {
            return "$column $operator {$this->queryBuilder->buildExpression($value, $params)}";
        }

        $phName = $this->queryBuilder->bindParam($value, $params);
        return "$column $operator $phName";
    }
Method builds the raw SQL from the $expression that will not be additionally
escaped or quoted.

@param SimpleCondition $expression the expression to be built.
@param array $params the binding parameters.
@return string the raw SQL that will not be additionally escaped or quoted.