postgres

Commit Graph

Author	SHA1	Message	Date
Tom Lane	3c5232ae83	Check block number against the correct fork in get_raw_page(). get_raw_page tried to validate the supplied block number against RelationGetNumberOfBlocks(), which of course is only right when accessing the main fork. In most cases, the main fork is longer than the others, so that the check was too weak (allowing a lower-level error to be reported, but no real harm to be done). However, very small tables could have an FSM larger than their heap, in which case the mistake prevented access to some FSM pages. Per report from Torsten Foertsch. In passing, make the bad-block-number error into an ereport not elog (since it's certainly not an internal error); and fix sloppily maintained comment for RelationGetNumberOfBlocksInFork. This has been wrong since we invented relation forks, so back-patch to all supported branches.	12 years ago
Robert Haas	0d692a0dc9	Basic foreign table support. Foreign tables are a core component of SQL/MED. This commit does not provide a working SQL/MED infrastructure, because foreign tables cannot yet be queried. Support for foreign table scans will need to be added in a future patch. However, this patch creates the necessary system catalog structure, syntax support, and support for ancillary operations such as COMMENT and SECURITY LABEL. Shigeru Hanada, heavily revised by Robert Haas	15 years ago
Bruce Momjian	5d950e3b0c	Stamp copyrights for year 2011.	15 years ago
Magnus Hagander	9f2e211386	Remove cvs keywords from all files.	15 years ago
Bruce Momjian	0239800893	Update copyright for the year 2010.	16 years ago
Bruce Momjian	d747140279	8.4 pgindent run, with new combined Linux/FreeBSD/MinGW typedef list provided by Andrew.	17 years ago
Tom Lane	a1fd650d2b	Fix contrib/pageinspect to not create an ABI breakage between 8.3 and 8.4. The original implementation of the 3-argument form of get_raw_page() risked core dumps if the 8.3 SQL function definition was mistakenly used with the 8.4 module, which is entirely likely after a dump-and-reload upgrade. To protect 8.4 beta testers against upgrade problems, add a check on PG_NARGS. In passing, fix missed additions to the uninstall script, and polish the docs a trifle.	17 years ago
Tom Lane	c029a6a49e	Fix contrib/pgstattuple and contrib/pageinspect to prevent attempts to read temporary tables of other sessions; that is unsafe because of the way our buffer management works. Per report from Stuart Bishop. This is redundant with the bufmgr.c checks in HEAD, but not at all redundant in the back branches.	17 years ago
Bruce Momjian	511db38ace	Update copyright for 2009.	17 years ago
Heikki Linnakangas	19c8dc839b	Unite ReadBufferWithFork, ReadBufferWithStrategy, and ZeroOrReadBuffer functions into one ReadBufferExtended function, that takes the strategy and mode as argument. There's three modes, RBM_NORMAL which is the default used by plain ReadBuffer(), RBM_ZERO, which replaces ZeroOrReadBuffer, and a new mode RBM_ZERO_ON_ERROR, which allows callers to read corrupt pages without throwing an error. The FSM needs the new mode to recover from corrupt pages, which could happend if we crash after extending an FSM file, and the new page is "torn". Add fork number to some error messages in bufmgr.c, that still lacked it.	17 years ago
Heikki Linnakangas	5f853c6556	Use fork names instead of numbers in the file names for additional relation forks. While the file names are not visible to users, for those that do peek into the data directory, it's nice to have more descriptive names. Per Greg Stark's suggestion.	17 years ago
Heikki Linnakangas	15c121b3ed	Rewrite the FSM. Instead of relying on a fixed-size shared memory segment, the free space information is stored in a dedicated FSM relation fork, with each relation (except for hash indexes; they don't use FSM). This eliminates the max_fsm_relations and max_fsm_pages GUC options; remove any trace of them from the backend, initdb, and documentation. Rewrite contrib/pg_freespacemap to match the new FSM implementation. Also introduce a new variant of the get_raw_page(regclass, int4, int4) function in contrib/pageinspect that let's you to return pages from any relation fork, and a new fsm_page_contents() function to inspect the new FSM pages.	17 years ago
Alvaro Herrera	f8c4d7db60	Restructure some header files a bit, in particular heapam.h, by removing some unnecessary #include lines in it. Also, move some tuple routine prototypes and macros to htup.h, which allows removal of heapam.h inclusion from some .c files. For this to work, a new header file access/sysattr.h needed to be created, initially containing attribute numbers of system columns, for pg_dump usage. While at it, make contrib ltree, intarray and hstore header files more consistent with our header style.	18 years ago
Tom Lane	220db7ccd8	Simplify and standardize conversions between TEXT datums and ordinary C strings. This patch introduces four support functions cstring_to_text, cstring_to_text_with_len, text_to_cstring, and text_to_cstring_buffer, and two macros CStringGetTextDatum and TextDatumGetCString. A number of existing macros that provided variants on these themes were removed. Most of the places that need to make such conversions now require just one function or macro call, in place of the multiple notational layers that used to be needed. There are no longer any direct calls of textout or textin, and we got most of the places that were using handmade conversions via memcpy (there may be a few still lurking, though). This commit doesn't make any serious effort to eliminate transient memory leaks caused by detoasting toasted text objects before they reach text_to_cstring. We changed PG_GETARG_TEXT_P to PG_GETARG_TEXT_PP in a few places where it was easy, but much more could be done. Brendan Jurd and Tom Lane	18 years ago
Tom Lane	ce9baa06f0	Fix some missed copyright updates.	18 years ago
Bruce Momjian	fdf5a5efb7	pgindent run for 8.3.	18 years ago
Tom Lane	cc59049daf	Improve handling of prune/no-prune decisions by storing a page's oldest unpruned XMAX in its header. At the cost of 4 bytes per page, this keeps us from performing heap_page_prune when there's no chance of pruning anything. Seems to be necessary per Heikki's preliminary performance testing.	19 years ago
Bruce Momjian	64058429c5	Add database page inspection /contrib module. Simon and Heikki	19 years ago

18 Commits (REL9_1_STABLE)