Hello,

pg_dump ignores anything created under object name "pg_*" or
"information_schema". I guess you will not have any "CREATE TABLE"
definition  as well for information_schema.abc. Related code:

else if (strncmp(nsinfo->dobj.name, "pg_", 3) == 0 ||
             strcmp(nsinfo->dobj.name, "information_schema") == 0)
    {
        /* Other system schemas don't get dumped */
        nsinfo->dobj.dump_contains = nsinfo->dobj.dump = DUMP_COMPONENT_NONE;
    }

Hence, there is no point of creating publication for it in the dump.

On Mon, May 22, 2017 at 4:22 PM, tushar <tushar.ah...@enterprisedb.com> wrote:
> Hi,
>
> pg_dump is ignoring tables which created under information_schema schema
> for  CREATE PUBLICATION .
>
> postgres=# create database  test;
> CREATE DATABASE
> postgres=# \c test
> You are now connected to database "test" as user "centos".
> test=# create table information_schema.abc(n int);
> CREATE TABLE
> test=# create publication test for table information_schema.abc;
> CREATE PUBLICATION
> test=# select * from pg_publication_tables;
>  pubname |     schemaname     | tablename
> ---------+--------------------+-----------
>  test    | information_schema | abc
> (1 row)
>
> test=# \q
> [centos@centos-cpula regress]$ pg_dump -Fp  test > /tmp/a.a
> [centos@centos-cpula regress]$ cat /tmp/a.a|grep publication -i
> -- Name: test; Type: PUBLICATION; Schema: -; Owner: centos
> CREATE PUBLICATION test WITH (publish = 'insert, update, delete');
> ALTER PUBLICATION test OWNER TO centos;
> [centos@centos-cpula regress]$
>
> --
> regards,tushar
> EnterpriseDB  https://www.enterprisedb.com/
> The Enterprise PostgreSQL Company
>
>
>
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-- 
Thanks & Regards,
Kuntal Ghosh
EnterpriseDB: http://www.enterprisedb.com


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