TYPO3 Core

// Mapping field name in SQL-functions like MIN(), MAX() or SUM()

if ($this->mapping[$t]['mapFieldNames']) {

$fieldArray = explode('.', $sqlPartArray[$k]['func_content']);

if (count($fieldArray) == 1 && is_array($this->mapping[$t]['mapFieldNames']) && isset($this->mapping[$t]['mapFieldNames'][$fieldArray[0]])) {

$sqlPartArray[$k]['func_content.'][0]['func_content'] = $this->mapping[$t]['mapFieldNames'][$fieldArray[0]];

$sqlPartArray[$k]['func_content'] = $this->mapping[$t]['mapFieldNames'][$fieldArray[0]];

}

elseif (count($fieldArray) == 2) {

// Map the external table

$table = $fieldArray[0];

if (isset($this->mapping[$fieldArray[0]]['mapTableName'])) {

$table = $this->mapping[$fieldArray[0]]['mapTableName'];

}

// Map the field itself

$field = $fieldArray[1];

if (is_array($this->mapping[$fieldArray[0]]['mapFieldNames']) && isset($this->mapping[$fieldArray[0]]['mapFieldNames'][$fieldArray[1]])) {

$field = $this->mapping[$fieldArray[0]]['mapFieldNames'][$fieldArray[1]];

}

$sqlPartArray[$k]['func_content.'][0]['func_content'] = $table . '.' . $field;

$sqlPartArray[$k]['func_content'] = $table . '.' . $field;

}

}