aboutsummaryrefslogtreecommitdiff
path: root/src/backend
Commit message (Collapse)AuthorAge
...
* Make startup process respond to signals to cancel waiting on latch.Simon Riggs2010-10-14
| | | | | | A tidy up for recently committed changes to startup latch. Fujii Masao
* Fix bug in comment of timeline history file.Simon Riggs2010-10-14
| | | | Fujii Masao
* Accept 'public' as a pseudo-role name in has_table_privilege() and friendsItagaki Takahiro2010-10-13
| | | | | | | to see if a particular privilege has been granted to PUBLIC. The issue was reported by Jim Nasby. Patch by Alvaro Herrera, and reviewed by KaiGai Kohei.
* Remove some unnecessary tests of pgstat_track_counts.Tom Lane2010-10-12
| | | | | | | | | | | | We may as well make pgstat_count_heap_scan() and related macros just count whenever rel->pgstat_info isn't null. Testing pgstat_track_counts buys nothing at all in the normal case where that flag is ON; and when it's OFF, the pgstat_info link will be null, so it's still a useless test. This change is unlikely to buy any noticeable performance improvement, but a cycle shaved is a cycle earned; and my investigations earlier today convinced me that we're down to the point where individual instructions in the inner execution loops are starting to matter.
* Fix assorted bugs in GIN's WAL replay logic.Tom Lane2010-10-11
| | | | | | | | | | | | | | The original coding was quite sloppy about handling the case where XLogReadBuffer fails (because the page has since been deleted). This would result in either "bad buffer id: 0" or an Assert failure during replay, if indeed the page were no longer there. In a couple of places it also neglected to check whether the change had already been applied, which would probably result in corrupted index contents. I believe that bug #5703 is an instance of the first problem. These issues could show up without replication, but only if you were unfortunate enough to crash between modification of a GIN index and the next checkpoint. Back-patch to 8.2, which is as far back as GIN has WAL support.
* Improve the planner's simplification of NOT constructs.Tom Lane2010-10-10
| | | | | | | | | | | | | | | | | This patch merges the responsibility for NOT-flattening into eval_const_expressions' processing. It wasn't done that way originally because prepqual.c is far older than eval_const_expressions. But putting this work into eval_const_expressions saves one pass over the qual trees, and in fact saves even more than that because we can exploit the knowledge that the subexpressions have already been recursively simplified. Doing it this way also lets us do it uniformly over all expressions, whereas prepqual.c formerly just did it at top level to save cycles. That should improve the planner's ability to recognize logically-equivalent constructs. While at it, also add the ability to fold a NOT into BooleanTest and NullTest constructs (the latter only for the scalar-datatype case). Per discussion of bug #5702.
* Support triggers on views.Tom Lane2010-10-10
| | | | | | | | | | | | | | | This patch adds the SQL-standard concept of an INSTEAD OF trigger, which is fired instead of performing a physical insert/update/delete. The trigger function is passed the entire old and/or new rows of the view, and must figure out what to do to the underlying tables to implement the update. So this feature can be used to implement updatable views using trigger programming style rather than rule hacking. In passing, this patch corrects the names of some columns in the information_schema.triggers view. It seems the SQL committee renamed them somewhere between SQL:99 and SQL:2003. Dean Rasheed, reviewed by Bernd Helmle; some additional hacking by me.
* Single-word clarification in postgresql.conf log_truncate_on_rotationBruce Momjian2010-10-08
| | | | comment.
* Fix sloppy usage of TRIGGER_FIRED_BEFORE/TRIGGER_FIRED_AFTER.Tom Lane2010-10-08
| | | | | | | | | | | | | | | | | | Various places were testing TRIGGER_FIRED_BEFORE() where what they really meant was !TRIGGER_FIRED_AFTER(), or vice versa. This needs to be cleaned up because there are about to be more than two possible states. We might want to note this in the 9.1 release notes as something for trigger authors to double-check. For consistency's sake I also changed some places that assumed that TRIGGER_FIRED_FOR_ROW and TRIGGER_FIRED_FOR_STATEMENT are necessarily mutually exclusive; that's not in immediate danger of breaking, but it's still sloppier than it should be. Extracted from Dean Rasheed's patch for triggers on views. I'm committing this separately since it's an identifiable separate issue, and is the only reason for the patch to touch most of these particular files.
* Improve logging in VACUUM FULL VERBOSE and CLUSTER VERBOSE.Tom Lane2010-10-07
| | | | | | | | | This patch resurrects some of the information that could be logged by the old, now-dead implementation of VACUUM FULL, in particular counts of live and dead tuples and the time taken for the table rebuild proper. There's still no logging about the ensuing index rebuilds, though. Itagaki Takahiro
* Eliminate some repetitive coding in tuplesort.c.Tom Lane2010-10-07
| | | | | | Use a macro LogicalTapeReadExact() to encapsulate the error check when we want to read an exact number of bytes from a "tape". Per a suggestion of Takahiro Itagaki.
* Teach CLUSTER to use seqscan-and-sort when it's faster than indexscan.Tom Lane2010-10-07
| | | | | | ... or at least, when the planner's cost estimates say it will be faster. Leonardo Francalanci, reviewed by Itagaki Takahiro and Tom Lane
* Reduce the memory requirement for large ispell dictionaries.Tom Lane2010-10-06
| | | | | | | | | | | This patch eliminates per-chunk palloc overhead for most small allocations needed in the representation of an ispell dictionary. This saves close to a factor of 2 on the current Czech ispell data. While it doesn't cover every last small allocation in the ispell code, we are at the point of diminishing returns, because about 95% of the allocations are covered already. Pavel Stehule, rather heavily revised by Tom
* Clean up temporary-memory management during ispell dictionary loading.Tom Lane2010-10-06
| | | | | | | | | | | Add explicit initialization and cleanup functions to spell.c, and keep all working state in the already-existing ISpellDict struct. This lets us get rid of a static variable along with some extremely shaky assumptions about usage of child memory contexts. This commit is just code beautification and has no impact on functionality or performance, but it opens the way to a less-grotty implementation of Pavel's memory-saving hack, which will follow shortly.
* Behave correctly if INSERT ... VALUES is decorated with additional clauses.Tom Lane2010-10-02
| | | | | | | | | | In versions 8.2 and up, the grammar allows attaching ORDER BY, LIMIT, FOR UPDATE, or WITH to VALUES, and hence to INSERT ... VALUES. But the special-case code for VALUES in transformInsertStmt() wasn't expecting any of those, and just ignored them, leading to unexpected results. Rather than complicate the special-case path, just ensure that the presence of any of those clauses makes us treat the query as if it had a general SELECT. Per report from Hitoshi Harada.
* Throw an appropriate error if ALTER COLUMN TYPE finds a dependent trigger.Tom Lane2010-10-02
| | | | | | | | | Actually making this case work, if the column is used in the trigger's WHEN condition, will take some new code that probably isn't appropriate to back-patch. For now, just throw a FEATURE_NOT_SUPPORTED error rather than allowing control to reach the "unexpected object" case. Per bug #5688 from Daniel Grace. Back-patch to 9.0 where the possibility of such a dependency was introduced.
* Improve messages for too many private files/dirs. Per Alexey Parshin.Tom Lane2010-09-28
|
* Fix PlaceHolderVar mechanism's interaction with outer joins.Tom Lane2010-09-28
| | | | | | | | | | | | | | The point of a PlaceHolderVar is to allow a non-strict expression to be evaluated below an outer join, after which its value bubbles up like a Var and can be forced to NULL when the outer join's semantics require that. However, there was a serious design oversight in that, namely that we didn't ensure that there was actually a correct place in the plan tree to evaluate the placeholder :-(. It may be necessary to delay evaluation of an outer join to ensure that a placeholder that should be evaluated below the join can be evaluated there. Per recent bug report from Kirill Simonov. Back-patch to 8.4 where the PlaceHolderVar mechanism was introduced.
* Add a SECURITY LABEL command.Robert Haas2010-09-27
| | | | | | | | This is intended as infrastructure to support integration with label-based mandatory access control systems such as SE-Linux. Further changes (mostly hooks) will be needed, but this is a big chunk of it. KaiGai Kohei and Robert Haas
* Add "(change requires restart)" note to some postgresql.conf parameters.Robert Haas2010-09-27
| | | | Devrim GÜNDÜZ
* Add ALTER TYPE ... ADD/DROP/ALTER/RENAME ATTRIBUTEPeter Eisentraut2010-09-26
| | | | | | | Like with tables, this also requires allowing the existence of composite types with zero attributes. reviewed by KaiGai Kohei
* Fix another join removal bug: the check on PlaceHolderVars was wrong.Tom Lane2010-09-25
| | | | | | | | The previous coding would decide that join removal was unsafe upon finding a PlaceHolderVar that needed to be evaluated at the inner rel and then used above the join. However, this fails to cover the case of PlaceHolderVars that refer to both the inner rel and some other rels. Per bug report from Andrus.
* ProcessIncomingNotify *must* reset notifyInterruptOccurred when called.Tom Lane2010-09-23
| | | | | This was broken in 9.0 by careless addition of an early-exit path. Bug report and diagnosis by Jeff Davis.
* Prevent show_session_authorization from crashing when session_authorizationTom Lane2010-09-23
| | | | | | | | | | | | | | | hasn't been set. The only known case where this can happen is when show_session_authorization is invoked in an autovacuum process, which is possible if an index function calls it, as for example in bug #5669 from Andrew Geery. We could perhaps try to return a sensible value, such as the name of the cluster-owning superuser; but that seems like much more trouble than the case is worth, and in any case it could create new possible failure modes. Simply returning an empty string seems like the most appropriate fix. Back-patch to all supported versions, even those before autovacuum, just in case there's another way to provoke this crash.
* Avoid sharing subpath list structure when flattening nested AppendRels.Tom Lane2010-09-23
| | | | | | | | | | | | | In some situations the original coding led to corrupting the child AppendRel's subpaths list, effectively adding other members of the parent's list to it. This was usually masked because we never made any further use of the child's list, but given the right combination of circumstances, we could do so. The visible symptom would be a relation getting scanned twice, as in bug #5673 from David Schmitt. Backpatch to 8.2, which is as far back as the risky coding appears. The example submitted by David only fails in 8.4 and later, but I'm not convinced that there aren't any even-more-obscure cases where 8.2 and 8.3 would fail.
* Make _outPathInfo print the relid set of the path's parent rel.Tom Lane2010-09-23
| | | | | | | We can't actually print the parent RelOptInfo in toto, because that would lead to infinite recursion. But it's safe enough to reach into the parent and print its identifying relids, and that makes it a whole lot easier to figure out what a Path represents. Should have done this years ago.
* Re-allow input of Julian dates prior to 0001-01-01 AD.Tom Lane2010-09-22
| | | | | | This was unintentionally broken in 8.4 while tightening up checking of ordinary non-Julian date inputs to forbid references to "year zero". Per bug #5672 from Benjamin Gigot.
* Convert cvsignore to gitignore, and add .gitignore for build targets.Magnus Hagander2010-09-22
|
* Typo fix. "CVS" is not the same thing as "CSV".Robert Haas2010-09-22
|
* Some more cleanup of CVS keyword noise.Tom Lane2010-09-21
| | | | | | | | Poking around for remaining occurrences of CVS keyword strings, I came across one that apparently reflects the use of a $Revision: ...$ string in the original input data. Dunno why anybody would be using that in an MTA's Received: lines, but there it is. Put it back to the way that it was originally, according to inspection of the CVS repo.
* The port/pg_latch.c symlink ought to be removed by make distclean.Tom Lane2010-09-21
| | | | | Not sure why these symlinks are removed here and not in the port/ Makefile, but I won't second-guess that choice right now.
* Remove cvs keywords from all files.Magnus Hagander2010-09-20
|
* Update HOT README about when single-page vacuums happen.Bruce Momjian2010-09-19
|
* Replace last remaining $Id$ with $PostgreSQL$.Tom Lane2010-09-19
|
* Make sure we wait for protocol-level EOF when ending binary COPY IN.Tom Lane2010-09-18
| | | | | | | | | | | | | | | The previous coding just terminated the COPY immediately after seeing the EOF marker (-1 where a row field count is expected). The expected CopyDone or CopyFail message just got thrown away later, since we weren't in COPY mode anymore. This behavior complicated matters for the JDBC driver, and arguably was the wrong thing in any case since a CopyFail message after the marker wouldn't be honored. Note that there is a behavioral change here: extra data after the EOF marker was silently ignored before, but now it will cause an error. Hence not back-patching, although this is arguably a bug. Per report and patch by Kris Jurka.
* Give a suitable HINT when an INSERT's data source is a RowExpr containingTom Lane2010-09-18
| | | | | | | | the same number of columns expected by the insert. This suggests that there were extra parentheses that converted the intended column list into a row expression. Original patch by Marko Tiikkaja, rather heavily editorialized by me.
* Remove duplicated code left behind by my recent refactoring of comment.cRobert Haas2010-09-17
| | | | | These checks are also present in objectaddress.c, so there's no need to recheck here.
* Add some documentation about how we WAL-log filesystem actions.Tom Lane2010-09-17
| | | | Per a question from Robert Haas.
* Treat exit code 128 (ERROR_WAIT_NO_CHILDREN) as non-fatal on Win32,Magnus Hagander2010-09-16
| | | | | | | | | | since it can happen when a process fails to start when the system is under high load. Per several bug reports and many peoples investigation. Back-patch to 8.4, which is as far back as the "deadman-switch" for shared memory access exists.
* Fix two typos in comments, spotted by Fujii Masao and Thom BrownHeikki Linnakangas2010-09-15
|
* Use a latch to make startup process wake up and replay immediately whenHeikki Linnakangas2010-09-15
| | | | | | | | | | new WAL arrives via streaming replication. This reduces the latency, and also allows us to use a longer polling interval, which is good for energy efficiency. We still need to poll to check for the appearance of a trigger file, but the interval is now 5 seconds (instead of 100ms), like when waiting for a new WAL segment to appear in WAL archive.
* Simplify Windows implementation of latches. There's no need to keep aHeikki Linnakangas2010-09-15
| | | | | | | | dynamic pool of event handles, we can permanently assign one for each shared latch. Thanks to that, we no longer need a separate shared memory block for latches, and we don't need to know in advance how many shared latches there is, so you no longer need to remember to update NumSharedLatches when you introduce a new latch to the system.
* Don't call OwnLatch while holding a spinlock. OwnLatch can elog() underHeikki Linnakangas2010-09-15
| | | | | some "can't happen" scenarios, and spinlocks should only be held for a few instructions anyway. As pointed out by Fujii Masao.
* Fix join-removal logic for pseudoconstant and outerjoin-delayed quals.Tom Lane2010-09-14
| | | | | | | | | | | | | | | | | | In these cases a qual can get marked with the removable rel in its required_relids, but this is just to schedule its evaluation correctly, not because it really depends on the rel. We were assuming that, in effect, we could throw away *all* quals so marked, which is nonsense. Tighten up the logic to be a little more paranoid about which quals belong to the outer join being considered for removal, and arrange for all quals that don't belong to be updated so they will still get evaluated correctly. Also fix another problem that happened to be exposed by this test case, which was that make_join_rel() was failing to notice some cases where a constant-false qual could be used to prove a join relation empty. If it's a pushed-down constant false, then the relation is empty even if it's an outer join, because the qual applies after the outer join expansion. Per report from Nathan Grange. Back-patch into 9.0.
* Oops, the timeout argument to WaitLatchOrSocket is in microseconds, notHeikki Linnakangas2010-09-14
| | | | milliseconds.
* Add a comment noting that the owner_pid test in OwnLatch is just a sanityHeikki Linnakangas2010-09-13
| | | | check, per request by Jeff Davis.
* Process options from the startup packed in walsender. Only few optionsHeikki Linnakangas2010-09-13
| | | | | | | | make sense for walsender, but for example application_name and client_encoding do. We still don't apply per-role settings from pg_db_role_setting, because that would require connecting to a database to read the table. Fujii Masao
* SERIALIZABLE transactions are actually implemented beneath the covers withJoe Conway2010-09-11
| | | | | | | | | | | transaction snapshots, i.e. a snapshot registered at the beginning of a transaction. Change variable naming and comments to reflect this reality in preparation for a future, truly serializable mode, e.g. Serializable Snapshot Isolation (SSI). For the moment transaction snapshots are still used to implement SERIALIZABLE, but hopefully not for too much longer. Patch by Kevin Grittner and Dan Ports with review and some minor wording changes by me.
* Add missing #includes, needed on some platforms. This should makeHeikki Linnakangas2010-09-11
| | | | the unixware buildfarm animals happy again.
* Introduce latches. A latch is a boolean variable, with the capability toHeikki Linnakangas2010-09-11
| | | | | | | | | | | | | | | | | | wait until it is set. Latches can be used to reliably wait until a signal arrives, which is hard otherwise because signals don't interrupt select() on some platforms, and even when they do, there's race conditions. On Unix, latches use the so called self-pipe trick under the covers to implement the sleep until the latch is set, without race conditions. On Windows, Windows events are used. Use the new latch abstraction to sleep in walsender, so that as soon as a transaction finishes, walsender is woken up to immediately send the WAL to the standby. This reduces the latency between master and standby, which is good. Preliminary work by Fujii Masao. The latch implementation is by me, with helpful comments from many people.
generated by cgit v1.2.3 (git 2.25.1) at 2025-08-03 07:21:23 +0000