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How to get single table data from backup 6+ messages / 4 participants [nested] [flat]
* How to get single table data from backup @ 2025-12-19 12:41 Andrus <[email protected]> 0 siblings, 3 replies; 6+ messages in thread From: Andrus @ 2025-12-19 12:41 UTC (permalink / raw) To: pgsql-general Hi! Large database backup is created using pg_dump -b -f backup.backup -F c How to restore single table in schema firma2 from it in Windows? Created database recovery and tried pg_restore --schema-only --n firma2 -d recovery backup.backup pg_restore -n firma2 -t tabletorecover -d recovery backup.backup This fails since tabletorecover contains lot foreign key references. Foreign keys refer to other tables which have foreign keys to another tables etc. making huge graph. All tables contain also data. I need to get table data only. Using PostgresSql 17 in windows. Andrus. ^ permalink raw reply [nested|flat] 6+ messages in thread
* Re: How to get single table data from backup @ 2025-12-19 16:12 Adrian Klaver <[email protected]> parent: Andrus <[email protected]> 2 siblings, 1 reply; 6+ messages in thread From: Adrian Klaver @ 2025-12-19 16:12 UTC (permalink / raw) To: Andrus <[email protected]>; pgsql-general On 12/19/25 04:41, Andrus wrote: > Hi! > > Large database backup is created using > > pg_dump -b -f backup.backup -F c > > How to restore single table in schema firma2 from it in Windows? > > Created database recovery and tried > > pg_restore --schema-only --n firma2 -d recovery backup.backup > pg_restore -n firma2 -t tabletorecover -d recovery backup.backup > > This fails since tabletorecover contains lot foreign key references. > Foreign keys refer to other tables which have foreign keys to another > tables etc. making huge graph. All tables contain also data. > > I need to get table data only. Using PostgresSql 17 in windows. 1) Does the table name tabletorecover occur in more then one SCHEMA? 2) Do you want only the table data for tabletorecover? Assuming 1 is one SCHEMA only and 2 is tabletorecover data only then maybe something like: 1) pg_restore --schema-only --table=tabletorecover -d recovery backup.backup 2) In psql ALTER TABLE tabletorecover DROP CONSTRAINT the FK references in tabletorecover. 3) pg_restore --data-only --table=tabletorecover -d recovery backup.backup > > Andrus. > > -- Adrian Klaver [email protected] ^ permalink raw reply [nested|flat] 6+ messages in thread
* Re: How to get single table data from backup @ 2025-12-19 16:12 Ray O'Donnell <[email protected]> parent: Andrus <[email protected]> 2 siblings, 0 replies; 6+ messages in thread From: Ray O'Donnell @ 2025-12-19 16:12 UTC (permalink / raw) To: Andrus <[email protected]>; pgsql-general On 19/12/2025 12:41, Andrus wrote: > Hi! > > Large database backup is created using > > pg_dump -b -f backup.backup -F c > > How to restore single table in schema firma2 from it in Windows? > > Created database recovery and tried > > pg_restore --schema-only --n firma2 -d recovery backup.backup > pg_restore -n firma2 -t tabletorecover -d recovery backup.backup > > This fails since tabletorecover contains lot foreign key references. > Foreign keys refer to other tables which have foreign keys to another > tables etc. making huge graph. All tables contain also data. > I haven't tried it, but - off the top of my head - how about: (i) Create the table separately by hand, without the FK references. (ii) Do a data-only restore, using the -a and -t options to pg_restore Ray. > I need to get table data only. Using PostgresSql 17 in windows. > > Andrus. > > -- Ray O'Donnell // Galway // Ireland [email protected] ^ permalink raw reply [nested|flat] 6+ messages in thread
* Re: How to get single table data from backup @ 2025-12-19 16:23 Adrian Klaver <[email protected]> parent: Adrian Klaver <[email protected]> 0 siblings, 0 replies; 6+ messages in thread From: Adrian Klaver @ 2025-12-19 16:23 UTC (permalink / raw) To: Andrus <[email protected]>; pgsql-general On 12/19/25 08:12, Adrian Klaver wrote: > On 12/19/25 04:41, Andrus wrote: >> Hi! >> >> Large database backup is created using >> >> pg_dump -b -f backup.backup -F c >> >> How to restore single table in schema firma2 from it in Windows? >> >> Created database recovery and tried >> >> pg_restore --schema-only --n firma2 -d recovery backup.backup >> pg_restore -n firma2 -t tabletorecover -d recovery backup.backup >> >> This fails since tabletorecover contains lot foreign key references. >> Foreign keys refer to other tables which have foreign keys to another >> tables etc. making huge graph. All tables contain also data. >> >> I need to get table data only. Using PostgresSql 17 in windows. > > 1) Does the table name tabletorecover occur in more then one SCHEMA? > > 2) Do you want only the table data for tabletorecover? > > Assuming 1 is one SCHEMA only and 2 is tabletorecover data only then > maybe something like: > > 1) pg_restore --schema-only --table=tabletorecover -d recovery > backup.backup > > 2) In psql ALTER TABLE tabletorecover DROP CONSTRAINT the FK references > in tabletorecover. > > 3) pg_restore --data-only --table=tabletorecover -d recovery backup.backup > An alternate method: 1) pg_restore --table=tabletorecover --file recovery.sql backup.backup Here you are restoring the table structure and data to a text file. 2) Open the text file and remove the FK references from the table definition. 3) Then do psql -f recovery.sql -d recovery If the amount of data is large and you don't want to deal with that in a text file then in step 1 add --schema to get just the table definition. Then do pg_restore --data-only --table=tabletorecover -d recovery backup.backup as step 4. >> >> Andrus. >> >> > > -- Adrian Klaver [email protected] ^ permalink raw reply [nested|flat] 6+ messages in thread
* Re: How to get single table data from backup @ 2025-12-19 17:05 Christoph Moench-Tegeder <[email protected]> parent: Andrus <[email protected]> 2 siblings, 1 reply; 6+ messages in thread From: Christoph Moench-Tegeder @ 2025-12-19 17:05 UTC (permalink / raw) To: Andrus <[email protected]>; +Cc: pgsql-general ## Andrus ([email protected]): > This fails since tabletorecover contains lot foreign key references. Check pg_restore options "--section=pre-data" and "--section=data" - pre-data is the schema without indexes, contraints, etc. (those would be in section post-data). Regards, Christoph -- Spare Space ^ permalink raw reply [nested|flat] 6+ messages in thread
* Re: How to get single table data from backup @ 2025-12-19 21:08 Andrus <[email protected]> parent: Christoph Moench-Tegeder <[email protected]> 0 siblings, 0 replies; 6+ messages in thread From: Andrus @ 2025-12-19 21:08 UTC (permalink / raw) To: Christoph Moench-Tegeder <[email protected]>; +Cc: pgsql-general Hi! Geat answer since doesnt require manual sql editing. It worked. Thank you. Andrus. 19.12.2025 19:05 Christoph Moench-Tegeder kirjutas: > ## Andrus ([email protected]): > >> This fails since tabletorecover contains lot foreign key references. > Check pg_restore options "--section=pre-data" and "--section=data" - > pre-data is the schema without indexes, contraints, etc. (those > would be in section post-data). > > Regards, > Christoph > ^ permalink raw reply [nested|flat] 6+ messages in thread
end of thread, other threads:[~2025-12-19 21:08 UTC | newest] Thread overview: 6+ messages (download: mbox mbox.gz follow: Atom feed) -- links below jump to the message on this page -- 2025-12-19 12:41 How to get single table data from backup Andrus <[email protected]> 2025-12-19 16:12 ` Adrian Klaver <[email protected]> 2025-12-19 16:23 ` Adrian Klaver <[email protected]> 2025-12-19 16:12 ` Ray O'Donnell <[email protected]> 2025-12-19 17:05 ` Christoph Moench-Tegeder <[email protected]> 2025-12-19 21:08 ` Andrus <[email protected]>
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