altertableconfiguretriggers(integer)

Slony-I 2.0.4 Documentation
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# 1.23. altertableconfiguretriggers(integer)

Function Properties

Language: PLPGSQL

Return Type: integer

alterTableConfigureTriggers (tab_id) Set the enable/disable configuration for the replication triggers according to the origin of the set.

    declare
    	p_tab_id			alias for $1;
    	v_no_id				int4;
    	v_tab_row			record;
    	v_tab_fqname		text;
    	v_n					int4;
    begin
    	-- ----
    	-- Grab the central configuration lock
    	-- ----
    	lock table sl_config_lock;

    	-- ----
    	-- Get our local node ID
    	-- ----
    	v_no_id := getLocalNodeId('_schemadoc');

    	-- ----
    	-- Get the sl_table row and the current tables origin.
    	-- ----
    	select T.tab_reloid, T.tab_set,
    			S.set_origin, PGX.indexrelid,
    			slon_quote_brute(PGN.nspname) || '.' ||
    			slon_quote_brute(PGC.relname) as tab_fqname
    			into v_tab_row
    			from sl_table T, sl_set S,
    				"pg_catalog".pg_class PGC, "pg_catalog".pg_namespace PGN,
    				"pg_catalog".pg_index PGX, "pg_catalog".pg_class PGXC
    			where T.tab_id = p_tab_id
    				and T.tab_set = S.set_id
    				and T.tab_reloid = PGC.oid
    				and PGC.relnamespace = PGN.oid
    				and PGX.indrelid = T.tab_reloid
    				and PGX.indexrelid = PGXC.oid
    				and PGXC.relname = T.tab_idxname
    				for update;
    	if not found then
    		raise exception 'Slony-I: alterTableConfigureTriggers(): Table with id % not found', p_tab_id;
    	end if;
    	v_tab_fqname = v_tab_row.tab_fqname;

    	-- ----
    	-- Configuration depends on the origin of the table
    	-- ----
    	if v_tab_row.set_origin = v_no_id then
    		-- ----
    		-- On the origin the log trigger is configured like a default
    		-- user trigger and the deny access trigger is disabled.
    		-- ----
    		execute 'alter table ' || v_tab_fqname ||
    				' enable trigger "_schemadoc_logtrigger"';
    		execute 'alter table ' || v_tab_fqname ||
    				' disable trigger "_schemadoc_denyaccess"';
    	else
    		-- ----
    		-- On a replica the log trigger is disabled and the
    		-- deny access trigger fires in origin session role.
    		-- ----
    		execute 'alter table ' || v_tab_fqname ||
    				' disable trigger "_schemadoc_logtrigger"';
    		execute 'alter table ' || v_tab_fqname ||
    				' enable trigger "_schemadoc_denyaccess"';

    	end if;

    	return p_tab_id;
    end;

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