Neil Conway [Wed, 10 Jan 2007 04:02:05 +0000 (04:02 +0000)]
Attached patch fixes two problems:
1) gendef works from inside visual studio - use a tempfile instead of
redirection, because for some reason you can't redirect dumpbin from
inside (patch from Joachim Wieland)
2) gendef must process only *.obj, or you get weird errors in some build
scenarios when it tries to process a logfile
Neil Conway [Wed, 10 Jan 2007 03:54:35 +0000 (03:54 +0000)]
This patch enables verbose output when building all projects. This is
the same output level that was used when building a single project
before, and really needed to get reasonable information about what
happens (non-verbose just says "starting build of foo" and "done
building foo", more or less).
Tom Lane [Tue, 9 Jan 2007 16:59:20 +0000 (16:59 +0000)]
Marginal tweaks in the documentation for ORDER BY; in particular point
out the common error that ORDER BY x, y DESC does not mean the same as
ORDER BY x DESC, y DESC.
Tom Lane [Tue, 9 Jan 2007 07:30:49 +0000 (07:30 +0000)]
Add a citation to Seltzer and Yigit's Usenix '91 paper about hash table
management. The paper clearly describes many of the ideas embodied in
our current hashing code, but as far as I could find out there is not
a direct code heritage. (Mike Olsen recalls discussion of this paper
at Postgres meetings but believes it "informed the Postgres implementation
probably just at the design level". Margo herself says she wasn't
involved with Postgres' hash code.) Credit where credit is due 'n all
that, even if fifteen years after the fact.
Bruce Momjian [Tue, 9 Jan 2007 03:43:32 +0000 (03:43 +0000)]
Done:
< * Allow the creation of indexes with mixed ascending/descending
> * -Allow the creation of indexes with mixed ascending/descending
<
< This is possible now by creating an operator class with reversed sort
< operators. One complexity is that NULLs would then appear at the start
< of the result set, and this might affect certain sort types, like
< merge join.
<
Tom Lane [Tue, 9 Jan 2007 02:14:16 +0000 (02:14 +0000)]
Support ORDER BY ... NULLS FIRST/LAST, and add ASC/DESC/NULLS FIRST/NULLS LAST
per-column options for btree indexes. The planner's support for this is still
pretty rudimentary; it does not yet know how to plan mergejoins with
nondefault ordering options. The documentation is pretty rudimentary, too.
I'll work on improving that stuff later.
Note incompatible change from prior behavior: ORDER BY ... USING will now be
rejected if the operator is not a less-than or greater-than member of some
btree opclass. This prevents less-than-sane behavior if an operator that
doesn't actually define a proper sort ordering is selected.
Tom Lane [Mon, 8 Jan 2007 16:47:30 +0000 (16:47 +0000)]
Tweak joinlist creation to avoid generating useless one-element subproblems
when collapsing of JOIN trees is stopped by join_collapse_limit. For instance
a list of 11 LEFT JOINs with limit 8 now produces something like
((1 2 3 4 5 6 7 8) 9 10 11 12)
instead of
(((1 2 3 4 5 6 7 8) (9)) 10 11 12)
The latter structure is really only required for a FULL JOIN.
Noted while studying an example from Shane Ambler.
Tom Lane [Mon, 8 Jan 2007 16:09:22 +0000 (16:09 +0000)]
Remove cost_hashjoin's very ancient hack to discourage (once, entirely forbid)
hash joins with the estimated-larger relation on the inside. There are
several cases where doing that makes perfect sense, and in cases where it
doesn't, the regular cost computation really ought to be able to figure that
out. Make some marginal tweaks in said computation to try to get results
approximating reality a bit better. Per an example from Shane Ambler.
Also, fix an oversight in the original patch to add seq_page_cost: the costs
of spilling a hash join to disk should be scaled by seq_page_cost.
Allow XML fragment to contain a XML declaration. For that, we need a small
hand-crafted parser for the XML declaration, because libxml doesn't seem
to allow this.
Bruce Momjian [Sat, 6 Jan 2007 22:24:16 +0000 (22:24 +0000)]
Updates for MONEY data type:
< * Improve the MONEY data type
> * -Make 64-bit version of the MONEY data type
> * Add locale-aware MONEY type, and support multiple currencies
< Change the MONEY data type to use DECIMAL internally, with special
< locale-aware output formatting.
< http://archives.postgresql.org/pgsql-hackers/2006-09/msg01107.php
Bruce Momjian [Sat, 6 Jan 2007 22:18:24 +0000 (22:18 +0000)]
Add:
>
> * Make consistent use of long/short command options --- pg_ctl needs
> long ones, pg_config doesn't have short ones, postgres doesn't have
> enough long ones, etc.
Bruce Momjian [Sat, 6 Jan 2007 21:58:22 +0000 (21:58 +0000)]
Add:
> o Consider parsing the -c string into individual queries so each
> is run in its own transaction
>
> o Consider disallowing multiple queries in PQexec() as an
> additional barrier to SQL injection attacks
Bruce Momjian [Sat, 6 Jan 2007 20:00:10 +0000 (20:00 +0000)]
Move INDEX inheritance out into a separate section:
< * Allow inherited tables to inherit index, UNIQUE constraint, and primary
< key, foreign key
< * UNIQUE INDEX on base column not honored on INSERTs/UPDATEs from
< inherited table: INSERT INTO inherit_table (unique_index_col) VALUES
< (dup) should fail
<
< The main difficulty with this item is the problem of creating an index
< that can span more than one table.
<
< * Allow SELECT ... FOR UPDATE on inherited tables
> * Inheritance
>
> o Allow inherited tables to inherit indexes, UNIQUE constraints,
> and primary/foreign keys
> o Honor UNIQUE INDEX on base column in INSERTs/UPDATEs
> on inherited table, e.g. INSERT INTO inherit_table
> (unique_index_col) VALUES (dup) should fail
>
> The main difficulty with this item is the problem of
> creating an index that can span multiple tables.
>
> o Allow SELECT ... FOR UPDATE on inherited tables
>
>
>
Replace xmlroot with a properly functioning version that parses the value,
sets the items, and serializes the value back (rather than adding an
arbitrary number of XML preambles as before).
The libxml memory management via palloc had to be disabled because it
crashes when libxml tries to access memory that was helpfully freed
earlier by PostgreSQL. This needs further thought.
Tom Lane [Sat, 6 Jan 2007 19:14:17 +0000 (19:14 +0000)]
Fix filtered_base_yylex() to save and restore base_yylval and base_yylloc
properly when doing a lookahead. The lack of this was causing various
interesting misbehaviors when one tries to use "with" as a plain identifier.
Tom Lane [Thu, 4 Jan 2007 17:49:37 +0000 (17:49 +0000)]
Tweak pg_dumpall to add GRANT CONNECT ON DATABASE ... TO PUBLIC when dumping
database privileges from a pre-8.2 server. This ensures that the reloaded
database will maintain the same behavior it had in the previous installation,
ie, everybody has connect privilege. Per gripe from L Bayuk.
Tom Lane [Thu, 4 Jan 2007 00:57:51 +0000 (00:57 +0000)]
Fix erroneous implementation of -s in postmaster.c (the switch doesn't take
an optarg). Add some comments noting that code in three different files has
to be kept in sync. Fix erroneous description of -S switch (it sets work_mem
not silent_mode), and do some light copy-editing elsewhere in postgres-ref.
Tom Lane [Wed, 3 Jan 2007 22:39:26 +0000 (22:39 +0000)]
Fix regex_fixed_prefix() to cope reasonably well with regex patterns of the
form '^(foo)$'. Before, these could never be optimized into indexscans.
The recent changes to make psql and pg_dump generate such patterns (for \d
commands and -t and related switches, respectively) therefore represented
a big performance hit for people with large pg_class catalogs, as seen in
recent gripe from Erik Jones. While at it, be more paranoid about
case-sensitivity checking in multibyte encodings, and fix some other
corner cases in which a regex might be interpreted too liberally.
Tom Lane [Wed, 3 Jan 2007 18:11:01 +0000 (18:11 +0000)]
Clean up smgr.c/md.c APIs as per discussion a couple months ago. Instead of
having md.c return a success/failure boolean to smgr.c, which was just going
to elog anyway, let md.c issue the elog messages itself. This allows better
error reporting, particularly in cases such as "short read" or "short write"
which Peter was complaining of. Also, remove the kluge of allowing mdread()
to return zeroes from a read-beyond-EOF: this is now an error condition
except when InRecovery or zero_damaged_pages = true. (Hash indexes used to
require that behavior, but no more.) Also, enforce that mdwrite() is to be
used for rewriting existing blocks while mdextend() is to be used for
extending the relation EOF. This restriction lets us get rid of the old
ad-hoc defense against creating huge files by an accidental reference to
a bogus block number: we'll only create new segments in mdextend() not
mdwrite() or mdread(). (Again, when InRecovery we allow it anyway, since
we need to allow updates of blocks that were later truncated away.)
Also, clean up the original makeshift patch for bug #2737: move the
responsibility for padding relation segments to full length into md.c.
Bruce Momjian [Wed, 3 Jan 2007 04:21:47 +0000 (04:21 +0000)]
For float4/8, remove errno checks for pow() and exp() because only some
platforms set errno, and we already have a check macro that detects
under/overflow, so there is no reason for platform-specific code
anymore.
Bruce Momjian [Tue, 2 Jan 2007 20:00:50 +0000 (20:00 +0000)]
Fix float4/8 to handle Infinity and Nan consistently, e.g. Infinity is a
valid result from a computation if one of the input values was infinity.
The previous code assumed an operation that returned infinity was an
overflow.
Handle underflow/overflow consistently, and add checks for aggregate
overflow.
Consistently prevent Inf/Nan from being cast to integer data types.
Tom Lane [Sun, 31 Dec 2006 20:32:04 +0000 (20:32 +0000)]
Found the problem with my operator-family changes: by fetching from
pg_opclass during LookupOpclassInfo(), I'd turned pg_opclass_oid_index
into a critical system index. However the problem could only manifest
during a backend's first attempt to load opclass data, and then only
if it had successfully loaded pg_internal.init and subsequently received
a relcache flush; which made it impossible to reproduce in sequential
tests and darn hard even in parallel tests. Memo to self: when
exercising cache flush scenarios, must disable LookupOpclassInfo's
internal cache too.
Tom Lane [Sat, 30 Dec 2006 21:21:56 +0000 (21:21 +0000)]
Support type modifiers for user-defined types, and pull most knowledge
about typmod representation for standard types out into type-specific
typmod I/O functions. Teodor Sigaev, with some editorialization by
Tom Lane.
Tom Lane [Thu, 28 Dec 2006 23:16:39 +0000 (23:16 +0000)]
Fix up btree's initial scankey processing to be able to detect redundant
or contradictory keys even in cross-data-type scenarios. This is another
benefit of the opfamily rewrite: we can find the needed comparison
operators now.
Tom Lane [Thu, 28 Dec 2006 19:53:05 +0000 (19:53 +0000)]
Enable btree_predicate_proof() to make proofs involving cross-data-type
predicate operators. The hard stuff turns out to be already done in the
previous commit, we need merely open the floodgates...
Bruce Momjian [Thu, 28 Dec 2006 18:01:20 +0000 (18:01 +0000)]
Done:
< * Move some /contrib modules out to their own project sites
<
< Particularly, move GPL-licensed /contrib/userlock and
< /contrib/dbmirror/clean_pending.pl.
<
Tom Lane [Thu, 28 Dec 2006 01:09:01 +0000 (01:09 +0000)]
Add a defense to prevent core dumps if 8.2 version of rank_cd() is used with
the 8.1 SQL function definition for it. Per report from Rajesh Kumar Mallah,
such a DBA error doesn't seem at all improbable, and the cost of checking for
it is not very high compared to the cost of running this function. (It would
have been better to change the C name of the function so it wouldn't be called
by the old SQL definition, but it's too late for that now in the 8.2 branch.)
Tom Lane [Thu, 28 Dec 2006 00:29:13 +0000 (00:29 +0000)]
fflush the \o file, if any, after each backslash command. We already
do this for ordinary SQL commands, so it seems consistent to do it for
backslash commands too. Per gripe from Rajesh Kumar Mallah.
Tom Lane [Wed, 27 Dec 2006 22:31:54 +0000 (22:31 +0000)]
Modify local buffer management to request memory for local buffers in blocks
of increasing size, instead of one at a time. This reduces the memory
management overhead when num_temp_buffers is large: in the previous coding
we would actually waste 50% of the space used for temp buffers, because aset.c
would round the individual requests up to 16K. Problem noted while studying
a performance issue reported by Steven Flatt.
Back-patch as far as 8.1 --- older versions used few enough local buffers
that the issue isn't significant for them.
Tom Lane [Wed, 27 Dec 2006 22:30:48 +0000 (22:30 +0000)]
Improve memory management code to avoid inefficient behavior when a context
has a small maxBlockSize: the maximum request size that we will treat as a
"chunk" needs to be limited to fit in maxBlockSize. Otherwise we will round
up the request size to the next power of 2, wasting space, which is a bit
pointless if we aren't going to make the blocks big enough to fit additional
stuff in them. The example motivating this is local buffer management, which
makes repeated allocations of 8K (one BLCKSZ buffer) in TopMemoryContext,
which has maxBlockSize = 8K because for the most part allocations there are
small. This leads to each local buffer actually eating 16K of space, which
adds up when there are thousands of them. I intend to change localbuf.c to
aggregate its requests, which will prevent this particular misbehavior, but
it seems likely that similar scenarios could arise elsewhere, so fixing the
core problem seems wise as well.
Tom Lane [Wed, 27 Dec 2006 19:45:36 +0000 (19:45 +0000)]
Print combining characters (those reported as having zero width by
PQdsplen()) normally, instead of replacing them by \uXXXX sequences.
Assume that they in fact occupy zero screen space for formatting purposes.
Per gripe from Michael Fuhr and ensuing discussion.