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Re: feature request: pg_restore renaming target schema - Mailing list pgsql-admin

From Shreeyansh Dba
Subject Re: feature request: pg_restore renaming target schema
Date
Msg-id CAGDYbUNK2tQZz4SfFBZit8o5wqHgy3Hz3SOgVhxkHh3aZ1DOwg@mail.gmail.com
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In response to feature request: pg_restore renaming target schema  (CN <cnliou9@fastmail.fm>)
Responses Re: feature request: pg_restore renaming target schema
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Hi CN,

The procedure you have followed in the beginning is right.

But if you are trying to do with second option like from source schema(s1) of db1 to target schema(t1) of db2, it is not possible with pg_restore because while restoring from backup dump, it follows the sequence of commands like 
"CREATE SCHEMA s1"
"SET SEARCH_PATH=s1"
"CREATE TABLE table_name(id int)"
"INSERT INTO table_name VALUES(1)"

2: If you are taking the dump in plan text format you can edit the plain text file and replace schema old name to new name and then you can restore the file using psql -d <db> -U <user> -f <path of plain text file>.


--
Thanks & Regards
Venkataramana Aitla
Database Administrator
Shreeyansh Technologies 

On Thu, Dec 17, 2015 at 1:14 PM, CN <cnliou9@fastmail.fm> wrote:
Hi!

I need to restore one source schema to multiple target schema currently.
For example,

source database: db1
source schema: s1
target database: db2

The existing approach I know is following these steps:

(1) pg_dump -n s1 -Fc -f source.db db1
(2a) pg_restore -d db2 -n s1 source.db
(2b) psql -c "ALTER SCHEMA s1 RENAME TO t1" db2
(3a) pg_restore -d db2 -n s1 source.db
(3b) psql -c "ALTER SCHEMA s1 RENAME TO t2" db2

So far so good.
However, with existing tool I know, obviously step groups (2) and (3)
can only run sequentially.

If pg_restore allows "redirecting" source schema to target schema, then
I can concurrently issue some imaginary commands like these:

pg_restore -d db2 -n s1 --target-schema=t1 source.db
pg_restore -d db2 -n s1 --target-schema=t2 source.db
pg_restore -d db2 -n s1 --target-schema=t3 source.db

Best Regards,
CN

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