log_planner_stats and prepared statements

I have found that log_planner_stats only outputs stats until the generic
plan is chosen. For example, if you run the following commands:

SET client_min_messages = 'log';
SET log_planner_stats = TRUE;

PREPARE e AS SELECT relkind FROM pg_class WHERE relname = $1 ORDER BY 1;

EXPLAIN ANALYZE VERBOSE EXECUTE e ('pg_class');
EXPLAIN ANALYZE VERBOSE EXECUTE e ('pg_class');
EXPLAIN ANALYZE VERBOSE EXECUTE e ('pg_class');
EXPLAIN ANALYZE VERBOSE EXECUTE e ('pg_class');
EXPLAIN ANALYZE VERBOSE EXECUTE e ('pg_class');
EXPLAIN ANALYZE VERBOSE EXECUTE e ('pg_class');
--> EXPLAIN ANALYZE VERBOSE EXECUTE e ('pg_class');

The last explain will _not_ show any log_planner_stats duration, though
it does show an EXPLAIN planning time:

Planning Time: 0.012 ms

It this expected behavior?

--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com

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