[HACKERS] ALTER SUBSCRIPTION ..SET PUBLICATION refresh is notthrowing error.

Hi,

ALTER SUBSCRIPTION ..SET PUBLICATION <no name> refresh  is removing all 
the attached subscription('s).

X Machine -

s=# create table t(n int);
CREATE TABLE
s=# create table t1(n int);
CREATE TABLE
s=# create publication pub for table  t,t1;
CREATE PUBLICATION
s=#

Y Machine -

s=# create table t(n int);
CREATE TABLE
s=# create table t1(n int);
CREATE TABLE
s=# create subscription s1 connection 'dbname=s port=5432 user=centos 
host=localhost' publication pub;
NOTICE:  synchronized table states
NOTICE:  created replication slot "s1" on publisher
CREATE SUBSCRIPTION

s=# alter subscription s1 set publication  skip refresh ;
NOTICE:  removed subscription for table public.t
NOTICE:  removed subscription for table public.t1
ALTER SUBSCRIPTION
s=#

I think - this is probably due to not given publication NAME in the sql 
query .

we are doing a syntax check at the time of REFRESH but not with SKIP 
REFRESH

s=# alter subscription s1 set publication   refresh ;
ERROR:  syntax error at or near ";"
LINE 1: alter subscription s1 set publication   refresh ;                                                        ^
s=# alter subscription s1 set publication  skip refresh ;
ALTER SUBSCRIPTION
s=#

-- 
regards,tushar
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