Subject why does it fail?
Hi, using FB 2.5.1 on Debian stable (FB is from unstable, tried also
with FB 2.5.0 from stable with the same results).

Example taken from
http://www.firebirdsql.org/file/documentation/reference_manuals/reference_material/html/langrefupd25-bigint.html

In a newly created database, using isql connected as SYSDBA:

SQL> create table WholeLottaRecords (
CON> id bigint not null primary key,
CON> description varchar(32)
CON> );
Statement failed, SQLSTATE = 42000
unsuccessful metadata update
-cannot create index RDB$PRIMARY27
SQL>

Why does it fail?

Thanks...
EB