Csaba Nagy wrote: > On Mon, 2007-10-08 at 09:40 +0100, Heikki Linnakangas wrote: >> This idea has been discussed to death many times before. Please search >> the archives. > > Somewhat related to the "visibility in index" thing: would it be > possible to have a kind of index-table ? We do have here some tables > which have 2-4 fields, and the combination of them forms the primary key > of the table. There are usually no other indexes on the table, and the > net result is that the PK index duplicates the heap. So it would be cool > if the index would be THE heap somehow...
The clustered index patch I worked on for 8.3, but didn't make it in, would have helped that use case a lot. A column-store kind of mechanism would be nice. Some columns could be stored in index-like structures, while other would be in the heap. I haven't seen any practical proposal on how to do it though. -- Heikki Linnakangas EnterpriseDB http://www.enterprisedb.com ---------------------------(end of broadcast)--------------------------- TIP 9: In versions below 8.0, the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match
