Description:
------------
PDOStatement::getColumnMeta() should allow a parameter (be it the same parameter as -1 or some other option) to return all columns.


Reproduce code:
---------------
$array = array();
for ($i = 0; $i < PDOStatement::columnCount(); $i++) {
  $array[] = PDOStatement::getColumnMeta($i);
}

could easily be replaced with a two-dimensional array that will return all columns.

The primary advantage would be avoiding $i function calls to getColumnMeta and $i to columnCount, which could be substantial versus returning the whole table meta data.

Returning a table's meta-data is nice to know the schema that's being returned.  A quick way to get the field names back.