While trying to help somebody on IRC with slow queries against
information_schema i stumbled across the following EXPLAIN buglet (much
reduced from the original one and does not make a lot of sense therefore):
foo=# explain SELECT * FROM information_schema.constraint_column_usage
JOIN information_schema.key_column_usage ON
key_column_usage.constraint_name = constraint_column_usage.constraint_name;
ERROR: record type has not been registered
Stefan
