Re: To take backup of Postgresql Database without large objects

On 4/11/25 05:55, sivapostgres@yahoo.com wrote:
> Hello,
> 
> Using PostgreSQL 15.1, compiled by Visual C++ build 1914, 64-bit in 
> Windows 10.
> 
> Trying to take backup of a database, using pg_dump, where one table 
> contains bytea datatype, which I don't want to include in the backup.
> 
> My command was:
> "E:\DBBackup\bin\pg_dump.exe"  -h 192.168.1.1 -p 5432 -U <username> 
> --no-blobs -F c -v -f "E:\DBBackup\demo6_110420251637.bak" demo6
> 
> the backup includes the bytea field also.
> 
> I tried with
> "E:\DBBackup\bin\pg_dump.exe"  -h 192.168.1.1 -p 5432 -U <username> -B 
> -F c -v -f "E:\DBBackup\demo6_110420251637.bak" demo6
> 
> also, which also included the bytea field.

1) Short version

Short version bytea fields != large objects.

2) Long version

 From here:

https://www.postgresql.org/docs/current/app-pgdump.html

-B
--no-large-objects
--no-blobs (deprecated)

     Exclude large objects in the dump.

     When both -b and -B are given, the behavior is to output large 
objects, when data is being dumped, see the -b documentation.

Where large objects are defined here:

https://www.postgresql.org/docs/current/largeobjects.html




> 
> What wrong I'm doing?  Couldn't figure it out.   Any help is appreciated.
> 
> Happiness Always
> BKR Sivaprakash
> 

-- 
Adrian Klaver
adrian.klaver@aklaver.com