periodically rescan the archive for new timelines, while waiting for new WAL
segments to arrive. This allows you to set up a standby server that follows
the TLI change if another standby server is promoted to master. Before this,
you had to restart the standby server to make it notice the new timeline.
This patch only scans the archive for TLI changes, it won't follow a TLI
change in streaming replication. That is much needed too, but it would be a
much bigger patch than I dare to sneak in this late in the release cycle.
There was discussion on improving the sanity checking of the WAL segments so
that the system would notice more reliably if the new timeline isn't an
ancestor of the current one, but that is not included in this patch.
Reviewed by Fujii Masao.
If a standby is broadcasting reply messages and we have named
one or more standbys in synchronous_standby_names then allow
users who set synchronous_replication to wait for commit, which
then provides strict data integrity guarantees. Design avoids
sending and receiving transaction state information so minimises
bookkeeping overheads. We synchronize with the highest priority
standby that is connected and ready to synchronize. Other standbys
can be defined to takeover in case of standby failure.
This version has very strict behaviour; more relaxed options
may be added at a later date.
Simon Riggs and Fujii Masao, with reviews by Yeb Havinga, Jaime
Casanova, Heikki Linnakangas and Robert Haas, plus the assistance
of many other design reviewers.
The original scheme for this was to symlink plpython.$DLSUFFIX to
plpython2.$DLSUFFIX, but that doesn't work on Windows, and only
accidentally failed to fail because of the way that CREATE LANGUAGE created
or didn't create new C functions. My changes of yesterday exposed the
weakness of that approach. To fix, get rid of the symlink and make
pg_pltemplate show what's really going on.
In createlang this is a one-line change. In droplang there's a whole
lot of cruft that can be discarded since the extension mechanism now
manages removal of the language's support functions.
Also, add deprecation notices to these two programs' reference pages,
since per discussion we may toss them overboard altogether in a release
or two.
Remove the unconditional superuser permissions check in CREATE EXTENSION,
and instead define a "superuser" extension property, which when false
(not the default) skips the superuser permissions check. In this case
the calling user only needs enough permissions to execute the commands
in the extension's installation script. The superuser property is also
enforced in the same way for ALTER EXTENSION UPDATE cases.
In other ALTER EXTENSION cases and DROP EXTENSION, test ownership of
the extension rather than superuserness. ALTER EXTENSION ADD/DROP needs
to insist on ownership of the target object as well; to do that without
duplicating code, refactor comment.c's big switch for permissions checks
into a separate function in objectaddress.c.
I also removed the superuserness checks in pg_available_extensions and
related functions; there's no strong reason why everybody shouldn't
be able to see that info.
Also invent an IF NOT EXISTS variant of CREATE EXTENSION, and use that
in pg_dump, so that dumps won't fail for installed-by-default extensions.
We don't have any of those yet, but we will soon.
This is all per discussion of wrapping the standard procedural languages
into extensions. I'll make those changes in a separate commit; this is
just putting the core infrastructure in place.
The grammar requires a specific ordering of the clauses, but the
documentation showed a different order. This error was introduced in
commit b47953f9c69d48a9261bd643e3170017b93f6337, which merged the CREATE
CONSTRAINT TRIGGER documentation into the CREATE TRIGGER page. There is
no code bug AFAICS.
Time spent executing AFTER triggers is not included in the runtime of the
associated ModifyTable node; in my patch of yesterday I confused queuing of
these triggers with their actual execution. Spotted by Marko Tiikkaja.
it a lot more useful for determining which standby is most up-to-date,
for example. There was long discussions on whether overwriting existing
existing WAL makes sense to begin with, and whether we should do some more
extensive variable renaming, but this change nevertheless seems quite
uncontroversial.
Fujii Masao, reviewed by Jeff Janes, Robert Haas, Stephen Frost.
Without this patch, when wal_receiver_status_interval=0, indicating that no
status messages should be sent, Hot Standby feedback messages are instead sent
extremely frequently.
Fujii Masao, with documentation changes by me.
This provides a separate exception class for each error code that the
backend defines, as well as the ability to get the SQLSTATE from the
exception object.
Jan Urbański, reviewed by Steve Singer
Adds a context manager, obtainable by plpy.subtransaction(), to run a
group of statements in a subtransaction.
Jan Urbański, reviewed by Steve Singer, additional scribbling by me
This allows functions with multiple OUT parameters returning both one
or multiple records (RECORD or SETOF RECORD).
Jan Urbański, reviewed by Hitoshi Harada
Emit a log message when creating a named restore point, and improve
documentation for pg_create_restore_point().
Euler Taveira de Oliveira, per suggestions from Thom Brown, with some
additional wordsmithing by me.
Add functions plpy.quote_ident, plpy.quote_literal,
plpy.quote_nullable, which wrap the equivalent SQL functions.
To be able to propagate char * constness properly, make the argument
of quote_literal_cstr() const char *. This also makes it more
consistent with quote_identifier().
Jan Urbański, reviewed by Hitoshi Harada, some refinements by Peter
Eisentraut
"SELECT ... INTO UNLOGGED tabname" works, but wasn't documented; CREATE
UNLOGGED SEQUENCE and CREATE UNLOGGED VIEW failed an assertion, instead
of throwing a sensible error.
Latter issue reported by Itagaki Takahiro; patch review by Tom Lane.
