/**
* Given one correct XMLDBField and the new name, returns the SQL statements
* to rename it (inside one array)
* MSSQL is special, so we overload the function here. It needs to
* drop the constraints BEFORE renaming the field
*/
function getRenameFieldSQL($xmldb_table, $xmldb_field, $newname)
{
$results = array();
//Array where all the sentences will be stored
/// Although this is checked in ddllib - rename_field() - double check
/// that we aren't trying to rename one "id" field. Although it could be
/// implemented (if adding the necessary code to rename sequences, defaults,
/// triggers... and so on under each getRenameFieldExtraSQL() function, it's
/// better to forbide it, mainly because this field is the default PK and
/// in the future, a lot of FKs can be pointing here. So, this field, more
/// or less, must be considered inmutable!
if ($xmldb_field->getName() == 'id') {
return array();
}
/// Drop the check constraint if exists
if ($xmldb_field->getEnum()) {
$results = array_merge($results, $this->getDropEnumSQL($xmldb_table, $xmldb_field));
}
/// Call to standard (parent) getRenameFieldSQL() function
$results = array_merge($results, parent::getRenameFieldSQL($xmldb_table, $xmldb_field, $newname));
return $results;
}
