in the regression database:
-regression=> vacuum verbose analyze onek;
+regression=> VACUUM VERBOSE ANALYZE onek;
NOTICE: --Relation onek--
NOTICE: Pages 98: Changed 25, Reapped 74, Empty 0, New 0;
Tup 1000: Vac 3000, Crash 0, UnUsed 0, MinLen 188, MaxLen 188;
vac=> INSERT INTO a VALUES (execq('INSERT INTO a VALUES (0)',0));
INSERT 167631 1
-vac=> select execq('SELECT * FROM a',0);
+vac=> SELECT execq('SELECT * FROM a',0);
NOTICE:EXECQ: 0 <<< inserted by execq
NOTICE:EXECQ: 1 <<< value returned by execq and inserted by upper INSERT