doctrine / orm

                $owningClass   = (isset($assoc['inherited'])) ? $this->em->getClassMetadata($assoc['inherited']) : $class;

                $sqlTableAlias = $this->getSQLTableAlias($owningClass->getTableName(), $dqlAlias);

                foreach ($assoc['joinColumns'] as $joinColumn) {

                    $columnName  = $joinColumn['name'];

                    $columnAlias = $this->getSQLColumnAlias($columnName);

                    $columnType  = PersisterHelper::getTypeOfColumn($joinColumn['referencedColumnName'], $targetClass, $this->em);

                    $quotedColumnName       = $this->quoteStrategy->getJoinColumnName($joinColumn, $class, $this->platform);

                    $sqlSelectExpressions[] = $sqlTableAlias . '.' . $quotedColumnName . ' AS ' . $columnAlias;

                    $this->rsm->addMetaResult($dqlAlias, $columnAlias, $columnName, $isIdentifier, $columnType);

                }

            }

            // Add foreign key columns to SQL, if necessary

                    if ($assoc['isOwningSide'] && $assoc['type'] & ClassMetadata::TO_ONE) {

                        $targetClass = $this->em->getClassMetadata($assoc['targetEntity']);

                        foreach ($assoc['joinColumns'] as $joinColumn) {

                            $columnName  = $joinColumn['name'];

                            $columnAlias = $this->getSQLColumnAlias($columnName);

                            $columnType  = PersisterHelper::getTypeOfColumn($joinColumn['referencedColumnName'], $targetClass, $this->em);

                            $quotedColumnName       = $this->quoteStrategy->getJoinColumnName($joinColumn, $subClass, $this->platform);

                            $sqlSelectExpressions[] = $sqlTableAlias . '.' . $quotedColumnName . ' AS ' . $columnAlias;

                            $this->rsm->addMetaResult($dqlAlias, $columnAlias, $columnName, $subClass->isIdentifier($columnName), $columnType);

                        }

                    }

                }

            }