I wrote: > ... I'm not even real sure what > all the issues would be, but I'm pretty sure that subplans are just the > tip of the iceberg.
Another issue is that ruleutils responds to column aliasing, as indeed it must to generate correct output for rules: regression=# explain select * from tenk1 a where a.unique1 = 42; QUERY PLAN ------------------------------------------------------------------------------- Index Scan using tenk1_unique1 on tenk1 a (cost=0.00..8.27 rows=1 width=244) Index Cond: (unique1 = 42) (2 rows) regression=# explain select * from tenk1 a(foo) where a.foo = 42; QUERY PLAN ------------------------------------------------------------------------------- Index Scan using tenk1_unique1 on tenk1 a (cost=0.00..8.27 rows=1 width=244) Index Cond: (foo = 42) (2 rows) This would be a bit of a problem for dblink or similar functions, which would have no way at all to know how the column names that they are dealing in got renamed. regards, tom lane -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers