1.103.  subscribeset( integer, integer, integer, boolean )

Function Properties
Language: PLPGSQL
Return Type: bigint

subscribeSet (sub_set, sub_provider, sub_receiver, sub_forward) Makes sure that the receiver is not the provider, then stores the subscription, and publishes the SUBSCRIBE_SET event to other nodes.

declare
	p_sub_set			alias for $1;
	p_sub_provider		alias for $2;
	p_sub_receiver		alias for $3;
	p_sub_forward		alias for $4;
	v_set_origin		int4;
	v_ev_seqno			int8;
begin
	-- ----
	-- Grab the central configuration lock
	-- ----
	lock table sl_config_lock;

	-- ----
	-- Check that this is called on the receiver node
	-- ----
	if p_sub_provider != getLocalNodeId('_schemadoc') then
		raise exception 'Slony-I: subscribeSet() must be called on provider';
	end if;

	-- ----
	-- Check that the origin and provider of the set are remote
	-- ----
	select set_origin into v_set_origin
			from sl_set
			where set_id = p_sub_set;
	if not found then
		raise exception 'Slony-I: set % not found', p_sub_set;
	end if;
	if v_set_origin = p_sub_receiver then
		raise exception 
				'Slony-I: set origin and receiver cannot be identical';
	end if;
	if p_sub_receiver = p_sub_provider then
		raise exception 
				'Slony-I: set provider and receiver cannot be identical';
	end if;


	-- ---
	-- Check to see if the set contains any tables - gripe if not - bug #1226
	-- ---
	if not exists (select true 
		from sl_table
		where tab_set = p_sub_set) then
		raise notice 'subscribeSet:: set % has no tables - risk of problems - see bug 1226', p_sub_set;
		raise notice 'http://gborg.postgresql.org/project/slony1/bugs/bugupdate.php?1226';
	end if;

	-- ----
	-- Create the SUBSCRIBE_SET event
	-- ----
	v_ev_seqno :=  createEvent('_schemadoc', 'SUBSCRIBE_SET', 
			p_sub_set, p_sub_provider, p_sub_receiver, 
			case p_sub_forward when true then 't' else 'f' end);

	-- ----
	-- Call the internal procedure to store the subscription
	-- ----
	perform subscribeSet_int(p_sub_set, p_sub_provider,
			p_sub_receiver, p_sub_forward);

	-- ----
	-- Submit listen management events
	-- ----
	perform RebuildListenEntries();

	return v_ev_seqno;
end;