protected function checkDatatype(\Database\Datatype $datatype)
{
$type = $datatype->getDatatype();
if ($type == 'blob' || $type == 'text') {
throw new \Exception(t('Constraint column may not be a blob'));
}
if (!is_a($datatype, '\\Database\\Datatype')) {
throw new \Exception(t('Constraint column is not a data type'));
}
}
private function alterColumnParameters(\Database\Datatype $new)
{
$table_name = $this->getFullName();
$column_name = $new->getName();
$datatype = $new->getDatatype();
$q[] = $datatype;
$size = $new->getSize();
if (!empty($size)) {
$q[] = '(' . $new->getSize() . ')';
}
$q[] = $new->getExtraInfo();
$new_column_parameters = implode(' ', $q);
$query = <<<EOF
ALTER TABLE {$table_name} ALTER COLUMN {$column_name} TYPE {$new_column_parameters}
EOF;
$this->db->exec($query);
}