/**
* Returns the SELECT clauses ready for inserting into a query.
*
* @param SQLSelect $query The expression object to build from
* @param array $parameters Out parameter for the resulting query parameters
* @return string Completed select part of statement
*/
protected function buildSelectFragment(SQLSelect $query, array &$parameters)
{
$distinct = $query->getDistinct();
$select = $query->getSelect();
$clauses = array();
foreach ($select as $alias => $field) {
// Don't include redundant aliases.
$fieldAlias = "\"{$alias}\"";
if ($alias === $field || substr($field, -strlen($fieldAlias)) === $fieldAlias) {
$clauses[] = $field;
} else {
$clauses[] = "{$field} AS {$fieldAlias}";
}
}
$text = 'SELECT ';
if ($distinct) {
$text .= 'DISTINCT ';
}
return $text .= implode(', ', $clauses);
}
