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Postgres FD Implementation
Commit e9c9a920 authored by Tom Lane's avatar Tom Lane
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Update 9.1 release notes to reflect commits through today. 

Also do some desultory copy-editing on the notes.
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doc/src/sgml/extend.sgml
View file @ e9c9a920
......@@ -354,7 +354,7 @@
considered members of the extension.
</para>
<sect2 id="extension">
<sect2>
<title>Extension Files</title>
<indexterm>
......
doc/src/sgml/release-9.1.sgml
View file @ e9c9a920
......@@ -9,7 +9,7 @@
<simpara>2011-??-??</simpara>
</note>
<para>CURRENT AS OF 2011-03-15</para>
<para>CURRENT AS OF 2011-06-09</para>
<sect2>
<title>Overview</title>
......@@ -87,6 +87,9 @@
For example, disallow
<literal><replaceable>composite_value</>.text</literal> and
<literal>text(<replaceable>composite_value</>)</literal>.
Unintentional uses of this syntax have frequently resulted in bug
reports; although it was not a bug, it seems better to go back to
rejecting such expressions.
The <literal>CAST</> and <literal>::</> syntaxes are still available
for use when a cast of an entire composite value is actually intended.
</para>
......@@ -106,12 +109,6 @@
rechecking the domain type's constraints, whereas before the checks
were skipped.
</para>
<para>
Also, such a domain type is no longer allowed to match an
<type>anyarray</> parameter of a polymorphic function, except by
explicitly downcasting it to the base array type.
</para>
</listitem>
</itemizedlist>
......@@ -236,7 +233,7 @@
<listitem>
<para>
Adjust PL/pgSQL's error line reporting code to be consistent
Adjust PL/pgSQL's error line numbering code to be consistent
with other PLs (Pavel Stehule)
</para>
......@@ -247,6 +244,34 @@
</para>
</listitem>
<listitem>
<para>
Make PL/pgSQL complain about conflicting IN and OUT parameter names
(Tom Lane)
</para>
<para>
Formerly, the collision was not detected, and the name would just
silently refer to only the OUT parameter.
</para>
</listitem>
<listitem>
<para>
Type modifiers of PL/pgSQL variables are now visible to the SQL parser
(Tom Lane)
</para>
<para>
A type modifier (such as a varchar length limit) attached to a PL/pgSQL
variable was formerly enforced during assignments, but was ignored for
all other purposes. Such variables will now behave more like table
columns declared with the same modifier. This is not expected to make
any visible difference in most cases, but it could result in subtle
changes for some SQL commands issued by PL/pgSQL functions.
</para>
</listitem>
</itemizedlist>
</sect3>
......@@ -258,7 +283,7 @@
<listitem>
<para>
Have <link
Make <link
linkend="monitoring-stats-funcs-table"><function>pg_stat_reset()</></link>
reset all database-level statistics (Tomas Vondra)
</para>
......@@ -303,15 +328,17 @@
<listitem>
<para>
Allow unlogged tables using the <link
Support unlogged tables using the <link
linkend="SQL-CREATETABLE-description"><literal>UNLOGGED</></link>
clause in <link linkend="SQL-CREATETABLE"><command>CREATE
option in <link linkend="SQL-CREATETABLE"><command>CREATE
TABLE</></link> (Robert Haas)
</para>
<para>
These tables are optimized for performance but are cleared in
case of a server crash.
Such tables provide better update performance than regular tables,
but are not crash-safe: their contents are automatically cleared in
case of a server crash. Their contents do not propagate to
replication slaves, either.
</para>
</listitem>
......@@ -369,37 +396,26 @@
<listitem>
<para>
Allow inheritance table queries to return meaningfully-sorted
results (Greg Stark, Hans-Jurgen Schonig, Robert Haas, Tom
Lane)
</para>
<para>
This allows optimization of <literal>ORDER BY</> and
<literal>LIMIT</> clauses in inheritance table queries.
Allow inheritance table scans to return meaningfully-sorted
results (Greg Stark, Hans-Jurgen Schonig, Robert Haas, Tom Lane)
</para>
</listitem>
<listitem>
<para>
Allow optimizations of <literal>MIN</>/<literal>MAX</> for
inheritance table queries (Tom Lane)
This allows better optimization of queries that use <literal>ORDER
BY</>, <literal>LIMIT</>, or <literal>MIN</>/<literal>MAX</> with
inherited tables.
</para>
</listitem>
<listitem>
<para>
Support hashing array values (Tom Lane)
</para>
<para>
This provides additional query optimization possibilities.
Improve GIN index scan cost estimation (Teodor Sigaev)
</para>
</listitem>
<listitem>
<para>
Improve GIN index scan cost estimation (Teodor Sigaev)
Improve cost estimation for aggregates and window functions (Tom Lane)
</para>
</listitem>
......@@ -439,6 +455,20 @@
</para>
</listitem>
<listitem>
<para>
Reject <literal>local</> lines in <link
linkend="auth-pg-hba-conf"><filename>pg_hba.conf</></link>
on platforms that don't support Unix-socket connections
(Magnus Hagander)
</para>
<para>
Formerly, such lines were silently ignored, which could be surprising.
This makes the behavior more like other unsupported cases.
</para>
</listitem>
<listitem>
<para>
Allow <link linkend="gssapi-auth"><acronym>GSSAPI</></link>
......@@ -452,6 +482,34 @@
</para>
</listitem>
<listitem>
<para>
<link linkend="auth-ident"><literal>ident</literal></link>
authentication over local sockets is now known as
<link linkend="auth-peer"><literal>peer</literal></link>
(Magnus Hagander)
</para>
<para>
The old term is still accepted for backward compatibility.
</para>
</listitem>
<listitem>
<para>
Rewrite <link linkend="auth-peer"><acronym>peer</></link>
authentication to avoid use of credential control messages (Tom Lane)
</para>
<para>
This change makes the peer authentication code simpler and
better-performing. However, it requires the platform to provide the
<function>getpeereid</> function or an equivalent socket operation.
So far as is known, the only platform for which peer authentication
worked before and now will not is pre-5.0 NetBSD.
</para>
</listitem>
</itemizedlist>
</sect4>
......@@ -625,7 +683,23 @@
<para>
This avoids the requirement of manually transferring a file
system backup when creating a standby server.
system backup when setting up a standby server.
</para>
</listitem>
<listitem>
<para>
Add
<link linkend="guc-replication-timeout"><varname>replication_timeout</></link>
setting (Fujii Masao, Heikki Linnakangas)
</para>
<para>
Replication connections that are idle for more than the
<varname>replication_timeout</> interval will be terminated
automatically. Formerly, a failed connection was typically not
detected until the TCP timeout elapsed, which is inconveniently
long in many situations.
</para>
</listitem>
......@@ -645,23 +719,10 @@
</para>
<para>
This is a read-only permission used for streaming replication
and allows non-superusers to initiate replication connections.
This is a read-only permission used for streaming replication.
It allows a non-superuser role to be used for replication connections.
Previously only superusers could initiate replication
connections; superusers have this permission by default.
</para>
</listitem>
<listitem>
<para>
<link linkend="auth-ident"><literal>ident</literal></link>
authentication over local sockets is now known as
<link linkend="auth-peer"><literal>peer</literal></link>
(Magnus Hagander)
</para>
<para>
The old term is still accepted for backward compatibility.
connections; superusers still have this permission by default.
</para>
</listitem>
......@@ -695,7 +756,7 @@
</para>
<para>
This returns the time on the primary that generated the most
This returns the time at which the primary generated the most
recent commit or abort record applied on the standby.
</para>
</listitem>
......@@ -822,7 +883,7 @@
<para>
These named restore points can be specified as recovery
targets using the new <filename>recovery.conf</> setting
<link linkend="recovery-target-name"><varname>recovery_target_name</></link>
<link linkend="recovery-target-name"><varname>recovery_target_name</></link>.
</para>
</listitem>
......@@ -842,8 +903,8 @@
<para>
Add <link
linkend="guc-restart-after-crash"><varname>restart_after_crash</></link>
which disables server restart after a backend crash (Robert
Haas)
setting which disables automatic server restart after a backend
crash (Robert Haas)
</para>
<para>
......@@ -987,6 +1048,23 @@
<itemizedlist>
<listitem>
<para>
Add <link linkend="extend-extensions">extensions</link> which
simplify packaging of additions to <productname>PostgreSQL</>
(Dimitri Fontaine, Tom Lane)
</para>
<para>
Extensions are controlled by the new <link
linkend="SQL-CREATEEXTENSION"><command>CREATE</></link>/<link
linkend="SQL-ALTEREXTENSION"><command>ALTER</></link>/<link
linkend="SQL-DROPEXTENSION"><command>DROP EXTENSION</></link>
commands. This replaces ad-hoc methods of grouping objects that
are added to a <productname>PostgreSQL</> installation.
</para>
</listitem>
<listitem>
<para>
Add support for <link linkend="SQL-CREATEFOREIGNTABLE">foreign
......@@ -1041,6 +1119,19 @@
</para>
</listitem>
<listitem>
<para>
Support <literal>ALTER TABLE <replaceable>name</> {OF | NOT OF}
<replaceable>type</></literal>
(Noah Misch)
</para>
<para>
This syntax allows a standalone table to be made into a typed table,
or a typed table to be made standalone.
</para>
</listitem>
<listitem>
<para>
Add support for more object types in <command>ALTER ... SET
......@@ -1049,7 +1140,7 @@
<para>
This command is now supported for conversions, operators, operator
classes, operator families, text search configurations, and text search
classes, operator families, text search configurations, text search
dictionaries, text search parsers, and text search templates.
</para>
</listitem>
......@@ -1071,7 +1162,7 @@
</para>
<para>
This allows a primary key or unique constraint to be added using an
This allows a primary key or unique constraint to be defined using an
existing unique index, including a concurrently created unique index.
</para>
</listitem>
......@@ -1120,8 +1211,8 @@
<listitem>
<para>
Fix possible <quote>tuple concurrently updated</quote> error
when two server backends attempted to add an inheritance
parent to the same table at the same time (Robert Haas)
when two backends attempted to add an inheritance
child to the same table at the same time (Robert Haas)
</para>
<para>
......@@ -1356,7 +1447,7 @@
<listitem>
<para>
Allow <type>numeric</> to use a more compact, two-byte header
in many cases (Robert Haas)
in common cases (Robert Haas)
</para>
<para>
......@@ -1388,6 +1479,30 @@
</para>
</listitem>
<listitem>
<para>
Support hashing array values (Tom Lane)
</para>
<para>
This provides additional query optimization possibilities.
</para>
</listitem>
<listitem>
<para>
Don't treat a composite type as sortable unless all its column types
are sortable (Tom Lane)
</para>
<para>
This avoids possible <quote>could not identify a comparison function</>
failures at runtime, if it is possible to implement the query without
sorting. Also, <command>ANALYZE</> won't try to use inappropriate
statistics-gathering methods for columns of such composite types.
</para>
</listitem>
</itemizedlist>
<sect4>
......@@ -1402,6 +1517,13 @@
</para>
</listitem>
<listitem>
<para>
Add support for casting from <type>int4</> and <type>int8</>
to <type>numeric</> (Joey Adams)
</para>
</listitem>
<listitem>
<para>
Allow casting a table's row type to the table's supertype if
......@@ -1538,9 +1660,12 @@
</para>
<para>
This function is used to obtain a human-readable string describing an
object, based on the <link linkend="catalog-pg-class"><structname>pg_class</structname></link> OID, object OID, and sub-object OID. It can be used to
help interpret the contents of <link linkend="catalog-pg-depend"><structname>pg_depend</structname></link>.
This function is used to obtain a human-readable string describing
an object, based on the <link
linkend="catalog-pg-class"><structname>pg_class</structname></link>
OID, object OID, and sub-object ID. It can be used to help
interpret the contents of <link
linkend="catalog-pg-depend"><structname>pg_depend</structname></link>.
</para>
</listitem>
......@@ -1549,6 +1674,11 @@
Update comments for built-in operators and their underlying
functions (Tom Lane)
</para>
<para>
Functions that are meant to be used via an associated operator
are now commented as such.
</para>
</listitem>
<listitem>
......@@ -1603,7 +1733,7 @@
<listitem>
<para>
Allow <link linkend="SQL-CREATETRIGGER"><literal>INSTEAD
Support <link linkend="SQL-CREATETRIGGER"><literal>INSTEAD
OF</></link> triggers on views (Dean Rasheed)
</para>
......@@ -1772,6 +1902,12 @@
</para>
</listitem>
<listitem>
<para>
Add traceback information to PL/Python errors (Jan Urbanski)
</para>
</listitem>
<listitem>
<para>
Report PL/Python errors from iterators with <literal>PLy_elog</> (Jan
......@@ -1820,7 +1956,7 @@
<listitem>
<para>
Add the <literal>\conninfo</> command to <application>psql</>,
Add <application>psql</> command <literal>\conninfo</>
to show current connection information (David Christensen)
</para>
</listitem>
......@@ -1841,8 +1977,8 @@
<listitem>
<para>
Add system table <option>S</> option to <application>psql</>
<literal>\dn</> (schemas) (Tom Lane)
Add <option>S</> (<quote>system</>) option to <application>psql</>'s
<literal>\dn</> (list schemas) command (Tom Lane)
</para>
<para>
......@@ -1859,8 +1995,8 @@
</para>
<para>
This is passed to the editor using the
<envar>EDITOR_LINENUMBER_SWITCH</> environment variable.
This is passed to the editor according to the
<envar>EDITOR_LINENUMBER_SWITCH</> psql variable.
</para>
</listitem>
......@@ -1878,11 +2014,24 @@
<listitem>
<para>
Make <application>psql</application> distinguish between unique
Make <literal>\d</literal> distinguish between unique
indexes and unique constraints (Josh Kupershmidt)
</para>
</listitem>
<listitem>
<para>
Make <literal>\dt+</literal> report <function>pg_table_size</>
instead of <function>pg_relation_size</> when talking to 9.0 or
later servers (Bernd Helmle)
</para>
<para>
This is a more useful measure of table size, but note that it is
not identical to what was previously reported in the same display.
</para>
</listitem>
<listitem>
<para>
Additional tab completion support (Itagaki Takahiro, Pavel Stehule,
......@@ -1946,9 +2095,14 @@
<listitem>
<para>
Improve <application>pg_ctl</> start's <quote>wait</quote>
(<option>-w</>) mode to handle non-standard port numbers,
non-standard Unix-domain socket locations, permission
problems, and stale postmaster lock files (Bruce Momjian)
(<option>-w</>) option (Bruce Momjian, Tom Lane)
</para>
<para>
The wait mode is now significantly more robust. It will not get
confused by non-default postmaster port numbers, non-default
Unix-domain socket locations, permission problems, or stale
postmaster lock files.
</para>
</listitem>
......@@ -2002,15 +2156,16 @@
<listitem>
<para>
Allow libpq database clients to use Unix-domain sockets to
Allow libpq database clients to
check the user name of the server process using <link
linkend="libpq-connect-requirepeer"><literal>requirepeer</></link>
when connecting via Unix-domain sockets
(Peter Eisentraut)
</para>
<para>
<productname>PostgreSQL</> already allowed servers to determine
the client user name via Unix-domain sockets.
<productname>PostgreSQL</> already allowed servers to check
the client user name when connecting via Unix-domain sockets.
</para>
</listitem>
......@@ -2023,8 +2178,8 @@
</para>
<para>
The allow detection of the server's status without creating
a new session.
These functions allow detection of the server's status without
trying to open a new session.
</para>
</listitem>
......@@ -2056,18 +2211,13 @@
<listitem>
<para>
Add <link linkend="extension">extensions</link> which simplify
packaging of additions to <productname>PostgreSQL</> (Dimitri
Fontaine, Tom Lane)
Use <literal>+Olibmerrno</> compile flag with HP-UX C compilers
that accept it (Ibrar Ahmed)
</para>
<para>
This is controlled by the new <link
linkend="SQL-CREATEEXTENSION"><command>CREATE</></link>/<link
linkend="SQL-ALTEREXTENSION"><command>ALTER</></link>/<link
linkend="SQL-DROPEXTENSION"><command>DROP EXTENSION </></link>
command; this replaces a more manual method of adding features
to <productname>PostgreSQL</>.
This avoids possible misbehavior of math library calls on recent
HP platforms.
</para>
</listitem>
......@@ -2085,7 +2235,7 @@
<para>
This allows for faster compiles. Also, <literal>make -k</>
now works properly.
now works more consistently.
</para>
</listitem>
......@@ -2101,6 +2251,33 @@
</para>
</listitem>
<listitem>
<para>
Add <literal>make maintainer-check</> target
(Peter Eisentraut)
</para>
<para>
This target performs various source code checks that are not
appropriate for either the build or the regression tests. Currently:
duplicate_oids, SGML syntax and tabs check, NLS syntax check.
</para>
</listitem>
<listitem>
<para>
Support <literal>make check</> in <filename>contrib</>
(Peter Eisentraut)
</para>
<para>
Formerly only <literal>make installcheck</> worked, but now
there is support for testing in a temporary installation.
The top-level <literal>make check-world</> target now includes
testing <filename>contrib</> this way.
</para>
</listitem>
</itemizedlist>
</sect4>
......@@ -2137,7 +2314,7 @@
<para>
This allows building 64-bit Windows binaries even on non-Windows
platforms with cross-compiling.
platforms via cross-compiling.
</para>
</listitem>
......@@ -2152,6 +2329,19 @@
<itemizedlist>
<listitem>
<para>
Revise the API for GUC variable assign hooks (Tom Lane)
</para>
<para>
The previous functions of assign hooks are now split between check
hooks and assign hooks, where the former can fail but the latter
shouldn't. This change will impact add-on modules that define custom
GUC parameters.
</para>
</listitem>
<listitem>
<para>
Add latches to the source code to wait for events (Heikki
......@@ -2267,13 +2457,9 @@
<para>
Modify <filename>contrib</> modules and stored procedure
languages to install via the new <link
linkend="extension">extension</link> mechanism (Tom Lane,
linkend="extend-extensions">extension</link> mechanism (Tom Lane,
Dimitri Fontaine)
</para>
<para>
This replaces a more manual method of installation.
</para>
</listitem>
<listitem>
......@@ -2307,9 +2493,9 @@
<listitem>
<para>
Allow <link
Fix <link
linkend="fuzzystrmatch"><filename>contrib/fuzzystrmatch</></link>'s
<function>levenshtein()</> function handle multibyte characters
<function>levenshtein()</> function to handle multibyte characters
(Alexander Korotkov)
</para>
</listitem>
......@@ -2569,7 +2755,7 @@
</para>
<para>
This parameter shows table storage options.
This function shows table storage options in a readable form.
</para>
</listitem>
......
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