SYNOPSIS
#include <util/wdb.h>
NEOERR * wdb_keys (WDB *wdb, char **primary_key, ULIST **data);
ARGUMENTS
wdb - open database
DESCRIPTION
this function returns the key and column names for the current database
RETURN VALUE
primary_key - pointer to the primary keydata - pointer to a ULIST of the columns.
both of these are allocated structures, you can clear data
with uListDestroy (data, ULIST_FREE)