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* Add pg_xlogdump contrib programAlvaro Herrera2013-02-22
| | | | | | | | This program relies on rm_desc backend routines and the xlogreader infrastructure to emit human-readable rendering of WAL records. Author: Andres Freund, with many reworks by Álvaro Reviewed (in a much earlier version) by Peter Eisentraut
* Fix some planning oversights in postgres_fdw.Tom Lane2013-02-22
| | | | | | | | | | | Include eval costs of local conditions in remote-estimate mode, and don't assume the remote eval cost is zero in local-estimate mode. (The best we can do with that at the moment is to assume a seqscan, which may well be wildly pessimistic ... but zero won't do at all.) To get a reasonable local estimate, we need to know the relpages count for the remote rel, so improve the ANALYZE code to fetch that rather than just setting the foreign table's relpages field to zero.
* Blind attempt at fixing the non-MSVC Windows buildsAlvaro Herrera2013-02-22
| | | | | Apparently, they need -DBUILDING_DLL for the Assert() declarations to work correctly.
* Fix whole-row references in postgres_fdw.Tom Lane2013-02-22
| | | | | The optimization to not retrieve unnecessary columns wasn't smart enough. Noted by Thom Brown.
* Change postgres_fdw to show casts as casts, not underlying function calls.Tom Lane2013-02-22
| | | | | | | | | | | On reflection this method seems to be exposing an unreasonable amount of implementation detail. It wouldn't matter when talking to a remote server of the identical Postgres version, but it seems likely to make things worse not better if the remote is a different version with different casting infrastructure. Instead adopt ruleutils.c's policy of regurgitating the cast as it was originally specified; including not showing it at all, if it was implicit to start with. (We must do that because for some datatypes explicit and implicit casts have different semantics.)
* Get rid of postgres_fdw's assumption that remote type OIDs match ours.Tom Lane2013-02-22
| | | | | | | | The only place we depended on that was in sending numeric type OIDs in PQexecParams; but we can replace that usage with explicitly casting each Param symbol in the query string, so that the types are specified to the remote by name not OID. This makes no immediate difference but will be essential if we ever hope to support use of non-builtin types.
* Fix thinko in previous commit.Heikki Linnakangas2013-02-22
| | | | | | We must still initialize minRecoveryPoint if we start straight with archive recovery, e.g when recovering from a normal base backup taken with pg_start/stop_backup. Otherwise we never consider the system consistent.
* Adjust postgres_fdw's search path handling.Tom Lane2013-02-22
| | | | | | | | | | | Set the remote session's search path to exactly "pg_catalog" at session start, then schema-qualify only names that aren't in that schema. This greatly reduces clutter in the generated SQL commands, as seen in the regression test changes. Per discussion. Also, rethink use of FirstNormalObjectId as the "built-in object" cutoff --- FirstBootstrapObjectId is safer, since the former will accept objects in information_schema for instance.
* If recovery.conf is created after "pg_ctl stop -m i", do crash recovery.Heikki Linnakangas2013-02-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If you create a base backup using an atomic filesystem snapshot, and try to perform PITR starting from that base backup, or if you just kill a master server and create recovery.conf to put it into standby mode, we don't know how far we need to recover before reaching consistency. Normally in crash recovery, we replay all the WAL present in pg_xlog, and assume that we're consistent after that. And normally in archive recovery, minRecoveryPoint, backupEndRequired, or backupEndPoint is set in the control file, indicating how far we need to replay to reach consistency. But if the server was previously up and running normally, and you kill -9 it or take an atomic filesystem snapshot, none of those fields are set in the control file. The solution is to perform crash recovery first, replaying all the WAL in pg_xlog. After that's done, we assume that the system is consistent like in normal crash recovery, and switch to archive recovery mode after that. Per report from Kyotaro HORIGUCHI. In his scenario, recovery.conf was created after "pg_ctl stop -m i". I'm not sure we need to support that exact scenario, but we should support backing up using a filesystem snapshot, which looks identical. This issue goes back to at least 9.0, where hot standby was introduced and we started to track when consistency is reached. In 9.1 and 9.2, we would open up for hot standby too early, and queries could briefly see an inconsistent state. But 9.2 made it more visible, as we started to PANIC if we see a reference to a non-existing page during recovery, if we've already reached consistency. This is a fairly big patch, so back-patch to 9.2 only, where the issue is more visible. We can consider back-patching further after this has received some more testing in 9.2 and master.
* Move relpath() to libpgcommonAlvaro Herrera2013-02-21
| | | | | | | This enables non-backend code, such as pg_xlogdump, to use it easily. The previous location, in src/backend/catalog/catalog.c, made that essentially impossible because that file depends on many backend-only facilities; so this needs to live separately.
* Remove useless variableAlvaro Herrera2013-02-21
| | | | Per Jeff Janes
* Need to decorate XactIsoLevel as PGDLLIMPORT for postgres_fdw.Tom Lane2013-02-21
| | | | Per buildfarm.
* Teach MSVC build system about postgres_fdw.Tom Lane2013-02-21
| | | | Per buildfarm.
* Add postgres_fdw contrib module.Tom Lane2013-02-21
| | | | | | | | There's still a lot of room for improvement, but it basically works, and we need this to be present before we can do anything much with the writable-foreign-tables patch. So let's commit it and get on with testing. Shigeru Hanada, reviewed by KaiGai Kohei and Tom Lane
* Fix pg_dumpall with database names containing =Heikki Linnakangas2013-02-20
| | | | | | | | | | | | If a database name contained a '=' character, pg_dumpall failed. The problem was in the way pg_dumpall passes the database name to pg_dump on the command line. If it contained a '=' character, pg_dump would interpret it as a libpq connection string instead of a plain database name. To fix, pass the database name to pg_dump as a connection string, "dbname=foo", with the database name escaped if necessary. Back-patch to all supported branches.
* Don't pass NULL to fprintf, if a bogus connection string is given to pg_dump.Heikki Linnakangas2013-02-20
| | | | Back-patch to all supported branches.
* Fix yet another typo in comment.Heikki Linnakangas2013-02-20
| | | | Etsuro Fujita
* Move ExceptionalCondition back to postgres.hAlvaro Herrera2013-02-18
| | | | | | | | It needs to be defined in the backend even when assertions are not enabled. It's cleaner to put it back, than create a separate #ifdef section in c.h. Per trouble report from Jeff Janes
* Split pgstat file in smaller piecesAlvaro Herrera2013-02-18
| | | | | | | | | | | | | | | | We now write one file per database and one global file, instead of having the whole thing in a single huge file. This reduces the I/O that must be done when partial data is required -- which is all the time, because each process only needs information on its own database anyway. Also, the autovacuum launcher does not need data about tables and functions in each database; having the global stats for all DBs is enough. Catalog version bumped because we have a new subdir under PGDATA. Author: Tomas Vondra. Some rework by Álvaro Testing by Jeff Janes Other discussion by Heikki Linnakangas, Tom Lane.
* Add ALTER ROLE ALL SET commandPeter Eisentraut2013-02-17
| | | | | | | | This generalizes the existing ALTER ROLE ... SET and ALTER DATABASE ... SET functionality to allow creating settings that apply to all users in all databases. reviewed by Pavel Stehule
* Warn about initdb using mount-pointsBruce Momjian2013-02-16
| | | | | Add code to detect and warn about trying to initdb or create pg_xlog on mount points.
* Better fix for "unarchived WAL files get deleted on crash recovery" bug.Heikki Linnakangas2013-02-15
| | | | | | | | | | Revert my earlier fix for the bug that unarchived WAL files get deleted on crash recovery, commit c9cc7e05c6d82a9781883a016c70d95aa4923122. We create a .done file for files streamed or restored from archive, so the WAL file recycling logic used during normal operation works just as well during archive recovery. Per Fujii Masao's suggestion.
* Force archive_status of .done for xlogs created by dearchival/replication.Simon Riggs2013-02-15
| | | | | | | | | This is a forward-patch of commit 6f4b8a4f4f7a2d683ff79ab59d3693714b965e3d, applied to 9.2 back in August. The plan was to do something else in master, but it looks like it's not going to happen, so let's just apply the 9.2 solution to master as well. Fujii Masao
* Don't delete unarchived WAL files during crash recovery.Heikki Linnakangas2013-02-15
| | | | | Bug reported by Jehan-Guillaume (ioguix) de Rorthais. This was introduced with the change to keep WAL files restored from archive in pg_xlog, in 9.2.
* pgindent: Fix order in instructionsPeter Eisentraut2013-02-14
| | | | | | The previous order of steps didn't literally work, because git clean -fdx would delete the downloaded typedefs.list. Also, pgindent needs to be called with a path when one is in at the top of the build tree.
* Invent pre-commit/pre-prepare/pre-subcommit events for xact callbacks.Tom Lane2013-02-14
| | | | | | | | | | | | | | Currently it's only possible for loadable modules to get control during post-commit cleanup of a transaction. That doesn't work too well if they want to do something that could throw an error; for example, an FDW might need to issue a remote commit, which could well fail. To improve matters, extend the existing APIs for XactCallback and SubXactCallback functions to provide new pre-commit events for this purpose. The release notes will need to mention that existing callback functions should be checked to make sure they don't do something unwanted when one of the new event types occurs. In the examples within our source tree, contrib/sepgsql was fine but plpgsql had been a bit too cute.
* pg_upgrade: conditionally create cluster delete scriptBruce Momjian2013-02-14
| | | | | | If users create tablespaces inside the old cluster directory, it is impossible for the delete script to delete _only_ the old cluster files, so don't create a script in that case, and issue a message to the user.
* Fix pg_upgrade log file cleanup codeBruce Momjian2013-02-14
| | | | | Recent pg_upgrade parallel improvements introduced a bug that prevented cleanup of per-database log files.
* doc: Add make target to produce EPUB from DocBookPeter Eisentraut2013-02-13
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* Fix CVE-2013-0255 properly.Tom Lane2013-02-13
| | | | | | | | | | | | Revert commit ab0f7b6089fd215f6ce6081e2e222c38d643a526 (in HEAD only) in favor of the proper solution, which is to declare enum_recv() correctly in the system catalogs. It should be declared to take type "internal" not "cstring". Also improve the type_sanity regression test, which should have caught this typo, so that it actually would. Most of the relevant checks on the signature of type I/O functions should not have been restricted to basetypes/pseudotypes, as they should apply to any type's I/O functions.
* Fix contrib/pg_trgm's similarity() function for trigram-free strings.Tom Lane2013-02-13
| | | | | | | | | | | Cases such as similarity('', '') produced a NaN result due to computing 0/0. Per discussion, make it return zero instead. This appears to be the basic cause of bug #7867 from Michele Baravalle, although it remains unclear why her installation doesn't think Cyrillic letters are letters. Back-patch to all active branches.
* Fix bogus when-to-deregister-from-listener-array logic.Tom Lane2013-02-13
| | | | | | | | | | | | | | | | | | Since a backend adds itself to the global listener array during Exec_ListenPreCommit, it's inappropriate for it to remove itself during Exec_UnlistenCommit or Exec_UnlistenAllCommit --- that leads to failure when committing a transaction that did UNLISTEN then LISTEN, since we end up not registered though we should be. (This leads to missing later notifications, or to Assert failures in assert-enabled builds.) Instead deal with deregistering at the bottom of AtCommit_Notify, when we know the final state of the listenChannels list. Also, simplify the representation of registration status by replacing the transient backendHasExecutedInitialListen flag with an amRegisteredListener flag. Per report from Greg Sabino Mullane. Back-patch to 9.0, where the problem was introduced during the LISTEN/NOTIFY rewrite.
* Update visibility map in the second phase of vacuum.Heikki Linnakangas2013-02-13
| | | | | | | | There's a high chance that a page becomes all-visible when the second phase of vacuum removes all the dead tuples on it, so it makes sense to check for that. Otherwise the visibility map won't get updated until the next vacuum. Pavan Deolasee, reviewed by Jeff Janes.
* Rename "string" pstrdup argument to "in"Alvaro Herrera2013-02-12
| | | | | The former name collides with a symbol also used in the isolation test's parser, causing assorted failures in certain platforms.
* Don't build libpgcommon_srv.a just yetAlvaro Herrera2013-02-12
| | | | It's empty, and some archivers do not support that case.
* Create libpgcommon, and move pg_malloc et al to itAlvaro Herrera2013-02-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | libpgcommon is a new static library to allow sharing code among the various frontend programs and backend; this lets us eliminate duplicate implementations of common routines. We avoid libpgport, because that's intended as a place for porting issues; per discussion, it seems better to keep them separate. The first use case, and the only implemented by this patch, is pg_malloc and friends, which many frontend programs were already using. At the same time, we can use this to provide palloc emulation functions for the frontend; this way, some palloc-using files in the backend can also be used by the frontend cleanly. To do this, we change palloc() in the backend to be a function instead of a macro on top of MemoryContextAlloc(). This was previously believed to cause loss of performance, but this implementation has been tweaked by Tom and Andres so that on modern compilers it provides a slight improvement over the previous one. This lets us clean up some places that were already with localized hacks. Most of the pg_malloc/palloc changes in this patch were authored by Andres Freund. Zoltán Böszörményi also independently provided a form of that. libpgcommon infrastructure was authored by Álvaro.
* Add noreturn attributes to some error reporting functionsPeter Eisentraut2013-02-12
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* Support unlogged GiST index.Heikki Linnakangas2013-02-11
| | | | | | | | | | | | | | | The reason this wasn't supported before was that GiST indexes need an increasing sequence to detect concurrent page-splits. In a regular WAL- logged GiST index, the LSN of the page-split record is used for that purpose, and in a temporary index, we can get away with a backend-local counter. Neither of those methods works for an unlogged relation. To provide such an increasing sequence of numbers, create a "fake LSN" counter that is saved and restored across shutdowns. On recovery, unlogged relations are blown away, so the counter doesn't need to survive that either. Jeevan Chalke, based on discussions with Robert Haas, Tom Lane and me.
* Fix checkpoint after fast promotion.Heikki Linnakangas2013-02-11
| | | | | | | | | | The intention was to request a regular online checkpoint immediately after end of recovery, when performing "fast promotion". However, because the checkpoint was requested before other backends were allowed to write WAL, the checkpointer process performed a restartpoint rather than a checkpoint. Delay the RequestCheckPoint call until after recovery has truly ended, so that you get a real checkpoint.
* Include previous TLI in end-of-recovery and shutdown checkpoint records.Heikki Linnakangas2013-02-11
| | | | | | This isn't used for anything but a sanity check at the moment, but it could be highly valuable for debugging purposes. It could also be used to recreate timeline history by traversing WAL, which seems useful.
* Further cleanup of gistsplit.c.Tom Lane2013-02-10
| | | | | | | | | | | | | | | | | | | | After further reflection I was unconvinced that the existing coding is guaranteed to return valid union datums in every code path for multi-column indexes. Fix that by forcing a gistunionsubkey() call at the end of the recursion. Having done that, we can remove some clearly-redundant calls elsewhere. This should be a little faster for multi-column indexes (since the previous coding would uselessly do such a call for each column while unwinding the recursion), as well as much harder to break. Also, simplify the handling of cases where one side or the other of a primary split contains only don't-care tuples. The previous coding used a very ugly hack in removeDontCares() that essentially forced one random tuple to be treated as non-don't-care, providing a random initial choice of seed datum for the secondary split. It seems unlikely that that method will give better-than-random splits. Instead, treat such a split as degenerate and just let the next column determine the split, the same way that we handle fully degenerate cases where the two sides produce identical union datums.
* Remove useless picksplit-doesn't-support-secondary-split log spam.Tom Lane2013-02-10
| | | | | | | | | | | | | | This LOG message was put in over five years ago with the evident expectation that we'd make all GiST opclasses support secondary split directly. However, no such thing ever happened, and indeed the number of opclasses supporting it decreased to zero in 9.2. The reason is that improving on the default implementation isn't that easy --- the opclass-specific code that did exist, before 9.2, doesn't appear to have been any improvement over the default. Hence, remove the message altogether. There's certainly no point in nagging users about this in released branches, but I doubt that we'll ever implement complete opclass-specific support anyway.
* Remove vestigial secondary-split support in gist_box_picksplit().Tom Lane2013-02-10
| | | | | | | | | | | | | | | | | | | | | | | Not only is this implementation of secondary-split not better than the default implementation in gistsplit.c, it's actually worse. The gistsplit.c code at least looks to see if switching the left and right sides would make a better merge with the previously-split tuples, while this doesn't. In any case it's rather useless to support secondary split only in an edge case. There used to be more complete support for it here (in chooseLR()), but that was removed in commit 7f3bd86843e5aad84585a57d3f6b80db3c609916. It appears to me though that the chooseLR() code was really isomorphic to the default implementation, since it was still based on choosing the cheaper way of adding two sub-split vectors that had been chosen without regard to the primary split initially. I think an implementation of secondary split that could beat the default implementation would have to be pretty fully integrated into the split algorithm, not plastered on at the end. Back-patch to 9.2, but not further; previous branches have the chooseLR() code which I don't feel a great need to mess with. This is mainly so we just have two behaviors and not three among the various branches (IOW, this patch is cleanup for commit 7f3bd86843e5aad84585a57d3f6b80db3c609916's incomplete removal of secondary-split support).
* Document and clean up gistsplit.c.Tom Lane2013-02-10
| | | | | | | | | | Improve comments, rename some variables and functions, slightly simplify a couple of APIs, in an attempt to make this code readable by people other than its original author. Even though this is essentially just cosmetic, back-patch to all active branches, because otherwise it's going to make back-patching future fixes in this file very painful.
* Reduce log level of picksplit-doesn't-support-secondary-split whining.Tom Lane2013-02-09
| | | | | | This was agreed to back in 2007, but never actually done. Josh Hansen
* Add an example of attaching a default value to an updatable view.Tom Lane2013-02-09
| | | | | | This is probably the single most useful thing that ALTER VIEW can do, particularly now that we have auto-updatable views. So show an explicit example.
* psql: Improve unaligned expanded output for zero rowsPeter Eisentraut2013-02-09
| | | | This used to erroneously print an empty line. Now it prints nothing.
* psql: Improve expanded print output in tuples-only modePeter Eisentraut2013-02-09
| | | | | | When there are zero result rows, in expanded mode, "(No rows)" is printed. So far, there was no way to turn this off. Now, when tuples-only mode is turned on, nothing is printed in this case.
* Add support for ALTER RULE ... RENAME TO.Tom Lane2013-02-08
| | | | Ali Dar, reviewed by Dean Rasheed.
* Simplify box_overlap computations.Tom Lane2013-02-08
| | | | | | | | | | | | Given the assumption that a box's high coordinates are not less than its low coordinates, the tests in box_ov() are overly complicated and can be reduced to about half as much work. Since many other functions in geo_ops.c rely on that assumption, there doesn't seem to be a good reason not to use it here. Per discussion of Alexander Korotkov's GiST fix, which was already using the simplified logic (in a non-fuzzy form, but the equivalence holds just as well for fuzzy).
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