--> trace_test() start.  trace = 256, passed 'SQL'
EXECUTE select id from t where id = $1 (
$1: 10
);

10

--> trace_test() start.  trace = 0, passed 'undef'
11

--> trace_test() start.  trace = 0, passed '0'
12

--> trace_test() start.  trace = 256, passed 'SQL'
EXECUTE dbdpg_p15160_1 (
$1: 1000
);