Rules puzzle with "current" keyword.

Hi,

Looking at a previous bug report I noticed a strange behaviour
in rule creation and display.

postgres=> CREATE RULE rule1 AS ON UPDATE TO test1 DO INSERT INTO test2 SELECT * FROM
postgres-> test1 WHERE oid=current.oid;
ERROR: current: Table does not exist.

Above we do not recognise "current" as a special case.

If I substitute "old" for "current" the definition is accepted.

postgres=> CREATE RULE rule1 AS ON UPDATE TO test1 DO INSERT INTO test2 SELECT * FROM
postgres-> test1 WHERE oid=old.oid;
CREATE

Things get spooky when pg_rules shows the keyword "current" where I said "old".

postgres=> select * from pg_rules where rulename like '%rule1%';
tablename|rulename|definition
---------+--------+------------------------------------------------------------------------------------------------------------------
-----------------------------------------
test1 |rule1 |CREATE RULE "rule1" AS ON UPDATE TO "test1" DO INSERT INTO "test2" ("field1", "field2") SELECT "field1", "field2"
FROM "test1" WHERE "oid" = current."oid";
(1 row)

It could be that just the parser and rule decoder are out of step?

I'm not sure which is correct now "old" or "current", anyone care to comment?

Keith.