rollback works incorrect for some metadata changes
--------------------------------------------------
Key: CORE-4636
URL: http://tracker.firebirdsql.org/browse/CORE-4636
Project: Firebird Core
Issue Type: Bug
Components: Engine
Affects Versions: 3.0 Beta 2
Environment: 3.0.0.31455 embedded
Reporter: Nick Dee
(1):
-------
DECLARE EXTERNAL FUNCTION F RETURNS INTEGER BY VALUE ENTRY_POINT 'F'
MODULE_NAME 'MyUdf';
commit;
-------
(2):
-------
CREATE TABLE T (ID INTEGER NOT NULL);
alter table T add constraint PK_T primary key (ID);
create or alter trigger TR for T active after insert position 0
as
declare H Integer;
begin
H = F();
end;
commit;
-------
Invalid token.
invalid request BLR at offset 18.
function F is not defined.
module name or entrypoint could not be found
(3):
-------
make full disconnect.
copy MyUdf.dll to udf folder,
connect and try again (2).
-------
This operation is not defined for system tables.
unsuccessful metadata update.
cannot create index PK_T.
I see 2 bugs:
1. database is in inconsistent state after rollback on step (2) .
2. checking for existance of udf library on ddl statement is serious
restriction (maybe we need to create parameter in dbconfig for it).
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