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create or replace function execute_on_all_nodes(query varchar)
returns setof record language plpgsql as $D$
declare
node_sql varchar;
nodename varchar;
nodenames_query varchar;
res record;
begin
nodenames_query := 'SELECT node_name FROM pgxc_node';
for nodename in execute nodenames_query loop
node_sql = 'EXECUTE DIRECT ON (' || nodename || ') $$ ' || 'SELECT ''' ||
nodename || '''::text AS nodename, subquery.* FROM (' || query || ') subquery $$';
-- raise notice '%', node_sql;
FOR res IN EXECUTE node_sql LOOP
RETURN NEXT res;
END LOOP;
end loop;
end;
$D$;
SELECT r.nodename, r.status
FROM execute_on_all_nodes('SELECT pg_msgmodule_set(121, -1, -1, ''LOG'')')
AS r(nodename text, status bool);
nodename | status
------------+--------
coord1 | t
coord2 | t
datanode_1 | t
datanode_2 | t
(4 rows)
SELECT r.nodename, r.status
FROM execute_on_all_nodes('SELECT pg_msgmodule_set(97, -1, -1, ''LOG'')')
AS r(nodename text, status bool);
nodename | status
------------+--------
coord1 | t
coord2 | t
datanode_1 | t
datanode_2 | t
(4 rows)
SELECT r.nodename, r.status
FROM execute_on_all_nodes('SELECT pg_msgmodule_set(98, -1, -1, ''LOG'')')
AS r(nodename text, status bool);
nodename | status
------------+--------
coord1 | t
coord2 | t
datanode_1 | t
datanode_2 | t
(4 rows)
SELECT r.nodename, r.status
FROM execute_on_all_nodes('SELECT pg_msgmodule_set(99, -1, -1, ''LOG'')')
AS r(nodename text, status bool);
nodename | status
------------+--------
coord1 | t
coord2 | t
datanode_1 | t
datanode_2 | t
(4 rows)
SELECT r.nodename, r.status
FROM execute_on_all_nodes('SELECT pg_msgmodule_enable_all(true)')
AS r(nodename text, status bool);
nodename | status
------------+--------
coord1 | t
coord2 | t
datanode_1 | t
datanode_2 | t
(4 rows)
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