54 Commits (f9ccf92e16fc4d831d324c7f7ef347a0acdaef0a)

Author	SHA1	Message	Date
Tom Lane	25bf7f8b9b	Fix possible failures when a tuplestore switches from in-memory to on-disk ... mode while callers hold pointers to in-memory tuples. I reported this for the case of nodeWindowAgg's primary scan tuple, but inspection of the code shows that all of the calls in nodeWindowAgg and nodeCtescan are at risk. For the moment, fix it with a rather brute-force approach of copying whenever one of the at-risk callers requests a tuple. Later we might think of some sort of reference-count approach to reduce tuple copying.	17 years ago
Bruce Momjian	511db38ace	Update copyright for 2009.	17 years ago
Tom Lane	8e8854daa2	Add some basic support for window frame clauses to the window-functions ... patch. This includes the ability to force the frame to cover the whole partition, and the ability to make the frame end exactly on the current row rather than its last ORDER BY peer. Supporting any more of the full SQL frame-clause syntax will require nontrivial hacking on the window aggregate code, so it'll have to wait for 8.5 or beyond.	17 years ago
Tom Lane	95b07bc7f5	Support window functions a la SQL:2008. ... Hitoshi Harada, with some kibitzing from Heikki and Tom.	17 years ago