doctrine / orm

                $sql .= $this->walkPathExpression($expr);

                break;

            case ($expr instanceof AST\Subselect):

                $alias = $simpleSelectExpression->fieldIdentificationVariable ?: $this->scalarResultCounter++;

                $columnAlias = 'sclr' . $this->aliasCounter++;

                $this->scalarResultAliasMap[$alias] = $columnAlias;

                $sql .= '(' . $this->walkSubselect($expr) . ') AS ' . $columnAlias;

                break;

            case ($expr instanceof AST\Functions\FunctionNode):

            case ($expr instanceof AST\SimpleArithmeticExpression):

            case ($expr instanceof AST\NullIfExpression):

            case ($expr instanceof AST\CoalesceExpression):

            case ($expr instanceof AST\GeneralCaseExpression):

            case ($expr instanceof AST\SimpleCaseExpression):

                $alias = $simpleSelectExpression->fieldIdentificationVariable ?: $this->scalarResultCounter++;

                $columnAlias = $this->getSQLColumnAlias('sclr');

                $this->scalarResultAliasMap[$alias] = $columnAlias;

                $sql .= $expr->dispatch($this) . ' AS ' . $columnAlias;

                break;

            case ($expr instanceof AST\ParenthesisExpression):

                $sql .= $this->walkParenthesisExpression($expr);