typedef struct required_key_def DB_KEY_DEF;
typedef struct required_key_def * PDB_KEY_DEF;
struct required_key_def {
  struct {
    BIT_FIELD bPrimary : 1;
    BIT_FIELD bUnique : 1;
  } flags;
  CTEXTSTR name;
  CTEXTSTR colnames[MAX_KEY_COLUMNS];
  CTEXTSTR null;
};
required_key_def(int bPrimary, int bUnique, CTEXTSTR _name, CTEXTSTR colname1);
required_key_def(int bPrimary, int bUnique, CTEXTSTR _name, CTEXTSTR colname1, CTEXTSTR colname2);