6 Commits (2e8b4bf80473d0e4a4254b417424e79195a9ce6a)

Author	SHA1	Message	Date
Kevin Grittner	a343e223a5	Revert no-op changes to BufferGetPage() ... The reverted changes were intended to force a choice of whether any newly-added BufferGetPage() calls needed to be accompanied by a test of the snapshot age, to support the "snapshot too old" feature. Such an accompanying test is needed in about 7% of the cases, where the page is being used as part of a scan rather than positioning for other purposes (such as DML or vacuuming). The additional effort required for back-patching, and the doubt whether the intended benefit would really be there, have indicated it is best just to rely on developers to do the right thing based on comments and existing usage, as we do with many other conventions. This change should have little or no effect on generated executable code. Motivated by the back-patching pain of Tom Lane and Robert Haas	9 years ago
Tom Lane	5713f03973	Improve API of GenericXLogRegister(). ... Rename this function to GenericXLogRegisterBuffer() to make it clearer what it does, and leave room for other sorts of "register" actions in future. Also, replace its "bool isNew" argument with an integer flags argument, so as to allow adding more flags in future without an API break. Alexander Korotkov, adjusted slightly by me	9 years ago
Tom Lane	80cf18910c	Get rid of blinsert()'s use of GenericXLogUnregister(). ... That routine is dangerous, and unnecessary once we get rid of this one caller. In passing, fix failure to clean up temp memory context, or switch back to caller's context, during slowest exit path.	9 years ago
Kevin Grittner	8b65cf4c5e	Modify BufferGetPage() to prepare for "snapshot too old" feature ... This patch is a no-op patch which is intended to reduce the chances of failures of omission once the functional part of the "snapshot too old" patch goes in. It adds parameters for snapshot, relation, and an enum to specify whether the snapshot age check needs to be done for the page at this point. This initial patch passes NULL for the first two new parameters and BGP_NO_SNAPSHOT_TEST for the third. The follow-on patch will change the places where the test needs to be made.	9 years ago
Tom Lane	a9284849b4	Clean up some stuff in new contrib/bloom module. ... Coverity complained about implicit sign-extension in the BloomPageGetFreeSpace macro, probably because sizeOfBloomTuple isn't wide enough for size calculations. No overflow is really possible as long as maxoff and sizeOfBloomTuple are small enough to represent a realistic situation, but it seems like a good idea to declare sizeOfBloomTuple as Size not int32. Add missing check on BloomPageAddItem() result, again from Coverity. Avoid core dump due to not allocating so->sign array when scan->numberOfKeys is zero. Also thanks to Coverity. Use FLEXIBLE_ARRAY_MEMBER rather than declaring an array as size 1 when it isn't necessarily. Very minor beautification of related code. Unfortunately, none of the Coverity-detected mistakes look like they could account for the remaining buildfarm unhappiness with this module. It's barely possible that the FLEXIBLE_ARRAY_MEMBER mistake does account for that, if it's enabling bogus compiler optimizations; but I'm not terribly optimistic. We probably still have bugs to find here.	9 years ago
Teodor Sigaev	9ee014fc89	Bloom index contrib module ... Module provides new access method. It is actually a simple Bloom filter implemented as pgsql's index. It could give some benefits on search with large number of columns. Module is a single way to test generic WAL interface committed earlier. Author: Teodor Sigaev, Alexander Korotkov Reviewers: Aleksander Alekseev, Michael Paquier, Jim Nasby	9 years ago