Tom Lane [Thu, 3 Apr 2003 23:32:47 +0000 (23:32 +0000)]
Remove zero_damaged_pages from postgresql.conf.sample; the only way to
find out about it is to read the documentation that tells you how
dangerous it is. Add default_transaction_read_only to documentation;
seems to have been overlooked in patch that added read-only transactions.
Clean up check_guc comparison script, which has been suffering bit rot.
Tom Lane [Thu, 3 Apr 2003 22:35:48 +0000 (22:35 +0000)]
Prevent EXPLAIN (without ANALYZE) SELECT ... INTO from creating an INTO
table. Needed due to recent change that makes us call ExecutorStart
even when not planning to carry out the query.
Bruce Momjian [Mon, 31 Mar 2003 20:47:51 +0000 (20:47 +0000)]
The following patch cleans up the deferred trigger mechanism. There is
an unneeded memory context and some variables that are not used anymore.
It's pretty trivial and the regression tests pass fine. There's no
change in functionality, only deletion of unused code. I left an empty
function because maybe I'll need it for nested transactions.
Tom Lane [Mon, 31 Mar 2003 20:32:29 +0000 (20:32 +0000)]
TestConfiguration returns int, not bool. This mistake is relatively
harmless on signed-char machines but would lead to core dump in the
deadlock detection code if char is unsigned. Amazingly, this bug has
been here since 7.1 and yet wasn't reported till now. Thanks to Robert
Bruccoleri for providing the opportunity to track it down.
Bruce Momjian [Sat, 29 Mar 2003 03:56:44 +0000 (03:56 +0000)]
[ Backpatch to 7.3.X.]
typing error in src/backend/libpq/be-secure.c ???
Long Description
In src/backend/libpq/be-secure.c: secure_write
on SSL_ERROR_WANT_WRITE call secure_read instead
secure_write again. May be is this a typing error?
Sergey N. Yatskevich (syatskevich@n21lab.gosniias.msk.ru)
Tom Lane [Fri, 28 Mar 2003 20:17:13 +0000 (20:17 +0000)]
Add code to apply some simple sanity checks to the header fields of a
page when it's read in, per pghackers discussion around 17-Feb. Add a
GUC variable zero_damaged_pages that causes the response to be a WARNING
followed by zeroing the page, rather than the normal ERROR; this is per
Hiroshi's suggestion that there needs to be a way to get at the data
in the rest of the table.
Bruce Momjian [Thu, 27 Mar 2003 16:58:21 +0000 (16:58 +0000)]
It may not be obvious to you, but the plpython regression tests
include output that vary depending on the python build one is
running. Basically, the order of keys in a dictionary is
non-deterministic, and that part of the test fails for me regularly.
I rewrote the test to work around this problem, and include a patch
file with that change and the change to the expected otuput as well.
Bruce Momjian [Thu, 27 Mar 2003 16:57:39 +0000 (16:57 +0000)]
New \d format:
Example:
test=# \d test
Table "public.test"
Column | Type | Modifiers
--------+---------+-----------
a | integer | not null
Indexes:
"test_pkey" PRIMARY KEY btree (a)
Check Constraints:
"$2" CHECK (a > 1)
Foreign Key Constraints:
"$1" FOREIGN KEY (a) REFERENCES parent(b)
Rules:
myrule AS ON INSERT TO test DO INSTEAD NOTHING
Triggers:
"asdf asdf" AFTER INSERT OR DELETE ON test FOR EACH STATEMENT EXECUTE
PROCEDURE update_pg_pwd_and_pg_group(),
mytrigger AFTER INSERT OR DELETE ON test FOR EACH ROW EXECUTE PROCEDURE
update_pg_pwd_and_pg_group()
I have minimised the double quoting of identifiers as much as I could
easily, and I will submit another patch when I have time to work on it that
will use a 'fmtId' function to determine it exactly.
I think it's a significant improvement in legibility...
Obviously the table example above is slightly degenerate in that not many
tables in production have heaps of (non-constraint) triggers and rules.
Bruce Momjian [Thu, 27 Mar 2003 16:51:29 +0000 (16:51 +0000)]
This patch implements holdable cursors, following the proposal
(materialization into a tuple store) discussed on pgsql-hackers earlier.
I've updated the documentation and the regression tests.
Notes on the implementation:
- I needed to change the tuple store API slightly -- it assumes that it
won't be used to hold data across transaction boundaries, so the temp
files that it uses for on-disk storage are automatically reclaimed at
end-of-transaction. I added a flag to tuplestore_begin_heap() to control
this behavior. Is changing the tuple store API in this fashion OK?
- in order to store executor results in a tuple store, I added a new
CommandDest. This works well for the most part, with one exception: the
current DestFunction API doesn't provide enough information to allow the
Executor to store results into an arbitrary tuple store (where the
particular tuple store to use is chosen by the call site of
ExecutorRun). To workaround this, I've temporarily hacked up a solution
that works, but is not ideal: since the receiveTuple DestFunction is
passed the portal name, we can use that to lookup the Portal data
structure for the cursor and then use that to get at the tuple store the
Portal is using. This unnecessarily ties the Portal code with the
tupleReceiver code, but it works...
The proper fix for this is probably to change the DestFunction API --
Tom suggested passing the full QueryDesc to the receiveTuple function.
In that case, callers of ExecutorRun could "subclass" QueryDesc to add
any additional fields that their particular CommandDest needed to get
access to. This approach would work, but I'd like to think about it for
a little bit longer before deciding which route to go. In the mean time,
the code works fine, so I don't think a fix is urgent.
- (semi-related) I added a NO SCROLL keyword to DECLARE CURSOR, and
adjusted the behavior of SCROLL in accordance with the discussion on
-hackers.
- (unrelated) Cleaned up some SGML markup in sql.sgml, copy.sgml
Bruce Momjian [Thu, 27 Mar 2003 16:45:51 +0000 (16:45 +0000)]
* Make pg_get_triggerdef documentation consistent with other pg_get_
functions
* Document pg_conversion_is_visible() which was created in one of my
previous patches and didn't get documented for some reason
Bruce Momjian [Thu, 27 Mar 2003 16:45:01 +0000 (16:45 +0000)]
Attached are two patches for psql's tab-completion.c.
The first cleans up a couple of minor errors and ommissions
and adds tab completion support to more slash commands, e.g.
\dv.
The second is an attempt to add tab completion for schemas
and fully qualified relation names (e.g. public.mytable ).
I think this covers the TODO-item:
"Allow psql to do table completion for SELECT * FROM schema_part and table
completion for SELECT * FROM schema_name."
This happens via union selects querying:
- relation_name in current search path;
- schema_name;
- schema.relation_name
matching the current input string.
E.g:
SELECT p[TAB]
will produce a list of all appropriate relation names in the current search
path which begin with 'p', and also all schema names which begin with 'p';
\d pub[TAB]
will produce any relation names in the current search path and also
any schema names beginning with 'pub';
\d public.[TAB]
will produce a list of all relations in the schema 'public';
\d public.my[TAB]
produces all relation names beginning with 'my' in schema 'public'.
It seems to work for me; comments, suggestions, particularly regarding
the coding and queries, are very welcome.
Note that tables, indexes, views and sequences relations in the
'pg_catalog' namespace are excluded even though they are in
the current search path. I found not doing this produced annoying behaviour
when expanding names beginning with 'p'. People who work with system
tables a lot may not like this though; I can look for another solution
if necessary.
Tom Lane [Tue, 25 Mar 2003 03:16:41 +0000 (03:16 +0000)]
plpgsql can assign to subscripted variables now, e.g.
x[42] := whatever;
The facility is pretty primitive because it doesn't do array slicing and
it has the same semantics as array update in SQL (array must already
be non-null, etc). But it's a start.
Dave Cramer [Tue, 25 Mar 2003 02:28:45 +0000 (02:28 +0000)]
added DISTINCT to the query to get cross reference. This is required when two columns in a table are both foreign keys to another table. From Peter Royal proyal@pace2020.com
Tom Lane [Tue, 25 Mar 2003 00:34:24 +0000 (00:34 +0000)]
Factor out duplicate code for computing values of PLpgSQL_datum items.
This is to help localize the changes needed for adding a new kind of
PLpgSQL_datum (like, say, an array element...)
Tom Lane [Mon, 24 Mar 2003 22:40:14 +0000 (22:40 +0000)]
Ignore SIGXFSZ (if platform has it), so that ulimit violations work like
disk-full conditions instead of provoking a backend crash. Per suggestion
from Frederic Surleau.
Tom Lane [Mon, 24 Mar 2003 21:42:33 +0000 (21:42 +0000)]
Modify keys_are_unique optimization to release buffer pins before it
returns NULL. This avoids out-of-buffers failures during many-way
indexscans, as in Shraibman's complaint of 21-Mar.
Tom Lane [Sun, 23 Mar 2003 23:01:03 +0000 (23:01 +0000)]
Adjust amrescan code so that it's allowed to call index_rescan with a
NULL key pointer, indicating that the existing scan key should be reused.
This behavior isn't used yet but will be needed for my planned fix to
the keys_are_unique code.
Tom Lane [Sun, 23 Mar 2003 05:14:37 +0000 (05:14 +0000)]
Instead of storing pg_statistic stavalues entries as text strings, store
them as arrays of the internal datatype. This requires treating the
stavalues columns as 'anyarray' rather than 'text[]', which is not 100%
kosher but seems to work fine for the purposes we need for pg_statistic.
Perhaps in the future 'anyarray' will be allowed more generally.
Tom Lane [Sat, 22 Mar 2003 17:11:25 +0000 (17:11 +0000)]
Department of second thoughts: probably shouldn't use nth() to get the
appropriate targetlist entry out of the subquery. Use an explicit search
like we do everywhere else.
Tom Lane [Sat, 22 Mar 2003 01:49:38 +0000 (01:49 +0000)]
Adjust subquery qual pushdown rules to be more forgiving: if a qual
refers to a non-DISTINCT output column of a DISTINCT ON subquery, or
if it refers to a function-returning-set, we cannot push it down.
But the old implementation refused to push down *any* quals if the
subquery had any such 'dangerous' outputs. Now we just look at the
output columns actually referenced by each qual expression. More code
than before, but probably no slower since we don't make unnecessary checks.
Peter Eisentraut [Fri, 21 Mar 2003 17:18:34 +0000 (17:18 +0000)]
Make "win" a separate port from "cygwin". This means you can now
configure under native Windows (MinGW that is), but you won't get very far
compiling yet. The dynaloader files are from Jan Wieck's patch set.
Tom Lane [Fri, 21 Mar 2003 01:58:05 +0000 (01:58 +0000)]
Reimplement NUMERIC datatype using base-10000 arithmetic; also improve
some of the algorithms for higher functions. I see about a factor of ten
speedup on the 'numeric' regression test, but it's unlikely that that test
is representative of real-world applications.
initdb forced due to change of on-disk representation for NUMERIC.
Bruce Momjian [Thu, 20 Mar 2003 20:05:32 +0000 (20:05 +0000)]
This is not the only place in the system catalogs where NULL is
effectively used to mean a default value that could also be spelled
out explicitly. (ACLs behave that way, and useconfig/datconfig
do too IIRC.)
It's a bit of a hack, but it saves table space and backend code ---
without this convention the default would have to be inserted "manually"
since we have no mechanism to supply defaults when C code is forming a
new catalog tuple.
I'm inclined to leave the code alone. But Alvaro is right that it'd be
good to point out the 'infinity' option in the CREATE USER and ALTER
USER man pages. (Doc patch please?)
Bruce Momjian [Thu, 20 Mar 2003 19:00:01 +0000 (19:00 +0000)]
The documentation for SELECT is incorrect in a sense: the syntax for a
join is defined as:
from_item [ NATURAL ] join_type from_item
[ ON join_condition | USING ( join_column_list ) ]
However, if the join_type is an INNER or OUTER join, an ON, USING, or
NATURAL clause *must* be specified (it's not optional, as that segment
of the docs suggest).
I'm not exactly sure what the best way to fix this is, so I've attached
a patch adding a FIXME comment to the relevant section of the SGML. If
anyone has any ideas on the proper way to outline join syntax, please
speak up.
Neil Conway <neilc@samurai.com> || PGP Key ID: DB3C29FC
Bruce Momjian [Thu, 20 Mar 2003 18:53:18 +0000 (18:53 +0000)]
Now that the CLUSTER ALL machinery is in place, the clusterdb script can
be simplified (I'd thought that it can even be removed). This patch
does that.
Bruce Momjian [Thu, 20 Mar 2003 18:14:46 +0000 (18:14 +0000)]
I have updated my pg_autovacuum program (formerly pg_avd, the name
changed as per discussion on the patches list).
This version should be a good bit better. It addresses all the issues
pointed out by Neil Conway. Vacuum and Analyze are now handled
separately. It now monitors for xid wraparound. The number of database
connections and queries has been significantly reduced compared the
previous version. I have moved it from bin to contrib. More detail on
the changes are in the TODO file.
I have not tested the xid wraparound code as I have to let my AthlonXP
1600 run select 1 in a tight loop for approx. two days in order to
perform the required 500,000,000 xacts.