On 2021-Nov-24, Robert Haas wrote: > Hmm. I think in my model an item and an item pointer and a line > pointer are all the same thing, but a TID is different. When I talk > about a TID, I mean the location of an item pointer, not its contents. > So a TID is what tells me that I want block 5 and the 4th slot in the > item pointer array. The item pointer tells me that the associate tuple > is at a certain position in the page and has a certain length.
OK, but you can have item pointers that don't have any item. LP_REDIRECT, LP_DEAD, LP_UNUSED item pointers don't have items. -- Álvaro Herrera Valdivia, Chile — https://www.EnterpriseDB.com/ "Nunca confiaré en un traidor. Ni siquiera si el traidor lo he creado yo" (Barón Vladimir Harkonnen)
