| protected _process_primary_keys ( string $table ) : string | ||
| $table | string | Table name |
| return | string | |
protected function _process_primary_keys($table)
{
$sql = '';
for ($i = 0, $c = count($this->primary_keys); $i < $c; $i++) {
if (!isset($this->fields[$this->primary_keys[$i]])) {
unset($this->primary_keys[$i]);
}
}
if (count($this->primary_keys) > 0) {
$sql .= ",\n\tCONSTRAINT " . $this->db->escape_identifiers('pk_' . $table) . ' PRIMARY KEY(' . implode(', ', $this->db->escape_identifiers($this->primary_keys)) . ')';
}
return $sql;
}