/**
* @param QOM\QueryObjectModelInterface $qom
*
* @return string
*/
public function walkQOMQuery(QueryObjectModel $qom)
{
$source = $qom->getSource();
$selectors = $this->validateSource($source);
$sourceSql = " " . $this->walkSource($source);
$constraintSql = '';
if ($constraint = $qom->getConstraint()) {
$constraintSql = " AND " . $this->walkConstraint($constraint);
}
$orderingSql = '';
if ($orderings = $qom->getOrderings()) {
$orderingSql = " " . $this->walkOrderings($orderings);
}
$sql = "SELECT " . $this->getColumns();
$sql .= $sourceSql;
$sql .= $constraintSql;
$sql .= $orderingSql;
$limit = $qom->getLimit();
$offset = $qom->getOffset();
if (null !== $offset && null == $limit && ($this->platform instanceof MySqlPlatform || $this->platform instanceof SqlitePlatform)) {
$limit = PHP_INT_MAX;
}
$sql = $this->platform->modifyLimitQuery($sql, $limit, $offset);
return array($selectors, $this->alias, $sql);
}
