Nikolay Samokhvalov

Nikolay Samokhvalov

of a multi-statement simple-Query message.  This bug goes all the way
back, but unfortunately is not nearly so easy to fix in existing releases;
it is only the recent ProcessUtility API change that makes it fixable in
HEAD.  Per report from William Garrison.

SIGQUIT signal, rather than waiting for PGSTAT_RESTART_INTERVAL.

doesn't exist.  This allows DROP to be used to clean out the pg_tablespace
catalog entry in a situation where a previous DROP attempt failed before
committing but after having removed the directories and symlink.

Per report from William Garrison.  Even though his test case depends on an
unrelated bug in PreventTransactionChain, it's certainly possible for this
situation to arise due to other problems, eg a system crash at just the
right time.

full words support, per report from Mark Stosberg.

of palloc instead of malloc, which means a list can be freed simply by deleting
the memory context that contains it.

sizeof(wchar_t) = 2 instead of 4.

First, genericcostestimate() was being way too liberal about including
partial-index conditions in its selectivity estimate, resulting in
substantial underestimates for situations such as an indexqual "x = 42"
used with an index on x "WHERE x >= 40 AND x < 50".  While the code is
intentionally set up to favor selecting partial indexes when available,
this was too much...

Second, choose_bitmap_and() was likewise easily fooled by cases of this
type, since it would similarly think that the partial index had selectivity
independent of the indexqual.

Fixed by using predicate_implied_by() rather than simple equality checks
to determine redundancy.  This is a good deal more expensive but I don't
see much alternative.  At least the extra cost is only paid when there's
actually a partial index under consideration.

Per report from Jeff Davis.  I'm not going to risk back-patching this,
though.

<
<
> 	o During index creation, pre-sort the tuples to improve build speed
>
> 	  http://archives.postgresql.org/pgsql-hackers/2007-03/msg01199.php
>

< * Add NUMERIC division operator that doesn't round?
<
<   Currently NUMERIC _rounds_ the result to the specified precision.
<   This means division can return a result that multiplied by the
<   divisor is greater than the dividend, e.g. this returns a value > 10:
<
<     SELECT (10::numeric(2,0) / 6::numeric(2,0))::numeric(2,0) * 6;
<
<   The positive modulus result returned by NUMERICs might be considered
<   inaccurate, in one sense.
<

* Add locale-aware MONEY type, and support multiple currencies
  http://archives.postgresql.org/pgsql-hackers/2007-03/msg01181.php

Uses same underlying tech as before, but not the sysv emulation layer.

* Allow accurate statistics to be collected on indexes with more than
  one column or expression indexes, perhaps using per-index statistics
>   http://archives.postgresql.org/pgsql-hackers/2007-03/msg01131.php

< 	o -Allow commenting of variables in postgresql.conf to restore them
> 	o Allow commenting of variables in postgresql.conf to restore them

> 	o -Allow commenting of variables in postgresql.conf to restore them
< 	  http://archives.postgresql.org/pgsql-hackers/2006-09/msg01481.php

and regexp_split_to_table. These functions provide access to the
capture groups resulting from a POSIX regular expression match,
and provide the ability to split a string on a POSIX regular
expression, respectively. Patch from Jeremy Drake; code review by
Neil Conway, additional comments and suggestions from Tom and
Peter E.

This patch bumps the catversion, adds some regression tests,
and updates the docs.

BTW, the comment in this file says that we hope we never have more than
10 catversion changes per day, but to even make this possible we should
start counting at zero, shouldn't we?


Jan

rules to be defined with different, per session controllable, behaviors
for replication purposes.

This will allow replication systems like Slony-I and, as has been stated
on pgsql-hackers, other products to control the firing mechanism of
triggers and rewrite rules without modifying the system catalog directly.

The firing mechanisms are controlled by a new superuser-only GUC
variable, session_replication_role, together with a change to
pg_trigger.tgenabled and a new column pg_rewrite.ev_enabled. Both
columns are a single char data type now (tgenabled was a bool before).
The possible values in these attributes are:

     'O' - Trigger/Rule fires when session_replication_role is "origin"
           (default) or "local". This is the default behavior.

     'D' - Trigger/Rule is disabled and fires never

     'A' - Trigger/Rule fires always regardless of the setting of
           session_replication_role

     'R' - Trigger/Rule fires when session_replication_role is "replica"

The GUC variable can only be changed as long as the system does not have
any cached query plans. This will prevent changing the session role and
accidentally executing stored procedures or functions that have plans
cached that expand to the wrong query set due to differences in the rule
firing semantics.

The SQL syntax for changing a triggers/rules firing semantics is

     ALTER TABLE <tabname> <when> TRIGGER|RULE <name>;

     <when> ::= ENABLE | ENABLE ALWAYS | ENABLE REPLICA | DISABLE

psql's \d command as well as pg_dump are extended in a backward
compatible fashion.

Jan

"If the patch is not BSD-licensed, it will be rejected."

test in parallel with the rules test at all, because the former wants to
create a couple of temp views, which can sometimes show up in the latter's
output.  Let's try it in the next parallel group instead.

to cover it.  Per report from Anton Pikhteryev.

* Simplify ability to create partitioned tables
>   http://archives.postgresql.org/pgsql-hackers/2007-03/msg00375.php

* Allow sequential scans to take advantage of other concurrent
  sequential scans, also called "Synchronised Scanning"

  http://archives.postgresql.org/pgsql-hackers/2007-03/msg00415.php

on preproc.h, else make may try to build it before preproc.h is ready.
Per failures seen here and in buildfarm.

are initialized with a string literal. Patch from Stefan Huehner.

to ANSI-style, and change "()" -> "(void)". Patch from Stefan Huehner.

- Made some chars const as proposed by Stefan Huehner <stefan@huehner.org>.
- Synced parser and keyword lists.
- Copied two token parsing from backend parser to ecpg parser.
- Also added a test case for this.