[firebird-support] GBAK - validation error for column X, value "*** null ***"
Hi! What would be a proper way of dealing with GBAK restore error 'validation error for column X, value "*** null ***"'? This error appears in one table, where X is the primary key. The database is Firebird 2.5.4 in the superserver mode. 1) How do I properly restore this backup? Neither -INACTIVE nor -NO_VALIDITY (nor both at the same time) help, the restore stops as soon as the first error is encountered. -ONE_AT_A_TIME gets me to the end of table data, but then I get another error at the "restoring privilege for user Y" "action cancelled by trigger (3) to preserve data integrity" "table/procedure has non-SQL security class defined". 2) Why doesn't GBAK complain during backup? I would expect that if a backup is successfully made, I will be able to restore it. Thanks, Josef
Re: [firebird-support] GBAK - validation error for column X, value "*** null ***"
Hi Josef, Such error is the consequence of the corruption - in the original database there was a NULL in the field (most likely, all fields in that record are NULL). gbak does not check constraints when reading. The best way to fix it is to find record with NULLs in the original database and delete it, then repeat backup/restore. If you don't have original records, it can be a problem. Try to restore database till the privileges error and then pump data from partially restored database to the new empty database with the same structure - you can use free tool IBDataPump for it. If problems continue, you can export data using our proprietary IBBackupSurgeon tool (http://ib-aid.com/en/ibbackupsurgeon/), which can export data on low-level. Regards, Alexey Kovyazin IBSurgeon Hi! What would be a proper way of dealing with GBAK restore error 'validation error for column X, value "*** null ***"'? This error appears in one table, where X is the primary key. The database is Firebird 2.5.4 in the superserver mode. 1) How do I properly restore this backup? Neither -INACTIVE nor -NO_VALIDITY (nor both at the same time) help, the restore stops as soon as the first error is encountered. -ONE_AT_A_TIME gets me to the end of table data, but then I get another error at the "restoring privilege for user Y" "action cancelled by trigger (3) to preserve data integrity" "table/procedure has non-SQL security class defined". 2) Why doesn't GBAK complain during backup? I would expect that if a backup is successfully made, I will be able to restore it. Thanks, Josef
Re: [firebird-support] GBAK - validation error for column X, value "*** null ***"
Hi! Thanks for the answer. Luckily, I still have the FDB file, so I can get rid of the bad records easily. What has me concerned is, what if I only had the backup? Your trick with pumping seems plausible, I will have to give it a try. IBBackupSurgeon looks promising, too. Josef On 15.5.2015 9:14, Alexey Kovyazin a...@ib-aid.com [firebird-support] wrote: > > Hi Josef, > > Such error is the consequence of the corruption - in the original > database there was a NULL in the field (most likely, all fields in > that record are NULL). > gbak does not check constraints when reading. > > The best way to fix it is to find record with NULLs in the original > database and delete it, then repeat backup/restore. > If you don't have original records, it can be a problem. > Try to restore database till the privileges error and then pump data > from partially restored database to the new empty database with the > same structure - you can use free tool IBDataPump for it. > If problems continue, you can export data using our proprietary > IBBackupSurgeon tool (http://ib-aid.com/en/ibbackupsurgeon/), which > can export data on low-level. > > Regards, > Alexey Kovyazin > IBSurgeon
Re: [firebird-support] GBAK - validation error for column X, value "*** null ***"
If you only have a backup and the backup is corrupted then very bad news. The best politic is always to do a backup/restore cycle inmediatly. So, if an error is detected when the backup is being restored you can take actions at that right moment. If your operating system is Windows, you can open a command window and write: *GBAK -b -user SYSDBA -password masterkey MyDataBase.FDB stdout | GBAK -user SYSDBA -password masterkey -r stdin MyRestoredDatabase.FDB* Any error will be inmediatly detected. And, if you can read Spanish, the following page has more info about this subject: https://firebird21.wordpress.com/2013/03/05/backup-y-restauracion-al-mismo-tiempo/ Greetings. Walter. On Fri, May 15, 2015 at 4:41 AM, Josef Kokeš j.ko...@apatykaservis.cz [firebird-support] wrote: > > > Hi! > > Thanks for the answer. Luckily, I still have the FDB file, so I can get > rid of the bad records easily. What has me concerned is, what if I only > had the backup? Your trick with pumping seems plausible, I will have to > give it a try. IBBackupSurgeon looks promising, too. > > Josef > > On 15.5.2015 9:14, Alexey Kovyazin a...@ib-aid.com [firebird-support] wrote: > > > > Hi Josef, > > > > Such error is the consequence of the corruption - in the original > > database there was a NULL in the field (most likely, all fields in > > that record are NULL). > > gbak does not check constraints when reading. > > > > The best way to fix it is to find record with NULLs in the original > > database and delete it, then repeat backup/restore. > > If you don't have original records, it can be a problem. > > Try to restore database till the privileges error and then pump data > > from partially restored database to the new empty database with the > > same structure - you can use free tool IBDataPump for it. > > If problems continue, you can export data using our proprietary > > IBBackupSurgeon tool (http://ib-aid.com/en/ibbackupsurgeon/), which > > can export data on low-level. > > > > Regards, > > Alexey Kovyazin > > IBSurgeon > > >
