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Postgres FD Implementation
Commit e9eb4f40 authored by Peter Eisentraut's avatar Peter Eisentraut
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Release notes for 9.1alpha2

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doc/src/sgml/release-9.1.sgml
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<!-- This is up-to-date with commits through 2010-09-01 --> <!-- This is up-to-date with commits through 2010-10-26 -->
<sect1 id="release-9-1-alpha"> <sect1 id="release-9-1-alpha">
<title>Release 9.1alpha1</title> <title>Release 9.1alpha1</title>
...@@ -72,8 +72,49 @@ ...@@ -72,8 +72,49 @@
<listitem> <listitem>
<para> <para>
<emphasis>Recognize functional dependency on primary <emphasis>Add ALTER TYPE ... ADD/DROP/ALTER/RENAME ATTRIBUTE</emphasis>
keys</emphasis> </para>
</listitem>
<listitem>
<para>
<emphasis>Support triggers on views</emphasis>
</para>
<para>
This adds the SQL-standard concept of an INSTEAD OF trigger,
which is fired instead of performing a physical
insert/update/delete. The trigger function is passed the
entire old and/or new rows of the view, and must figure out
what to do to the underlying tables to implement the update.
So this feature can be used to implement updatable views
using trigger programming style rather than rule hacking.
</para>
</listitem>
<listitem>
<para>
<emphasis>Allow WITH clauses to be attached to INSERT, UPDATE, DELETE
statements</emphasis>
</para>
<para>
This is not the hoped-for facility of using
INSERT/UPDATE/DELETE inside a WITH, but rather the other way
around.
</para>
</listitem>
<listitem>
<para>
<emphasis>Allow new values to be added to an existing enum type</emphasis>
</para>
</listitem>
<listitem>
<para>
Recognize functional dependency on primary
keys
</para> </para>
<para> <para>
This allows a table's other columns to be referenced without listing This allows a table's other columns to be referenced without listing
...@@ -84,7 +125,7 @@ ...@@ -84,7 +125,7 @@
<listitem> <listitem>
<para> <para>
<emphasis>Add CREATE TABLE IF NOT EXISTS</emphasis> Add CREATE TABLE IF NOT EXISTS
</para> </para>
</listitem> </listitem>
...@@ -96,22 +137,61 @@ ...@@ -96,22 +137,61 @@
<listitem> <listitem>
<para> <para>
<emphasis>Reduce lock levels of CREATE TRIGGER and some ALTER <emphasis>Support MergeAppend plans, to allow sorted output
TABLE, CREATE RULE actions</emphasis> from append relations</emphasis>
</para>
<para>
This eliminates the former need to sort the output of an
Append scan when an ordered scan of an inheritance tree is
wanted. This should be particularly useful for fast-start
cases such as queries with LIMIT.
</para>
</listitem>
<listitem>
<para>
<emphasis>Reduce the memory requirement for large ispell dictionaries</emphasis>
</para>
</listitem>
<listitem>
<para>
<emphasis>Teach CLUSTER to use seqscan-and-sort when it's faster than
indexscan</emphasis>
</para> </para>
</listitem> </listitem>
<listitem> <listitem>
<para> <para>
<emphasis>Add some knowledge about prefix matches to <emphasis>Improve GIN indexscan cost estimation</emphasis>
tsmatchsel()</emphasis>
</para> </para>
</listitem> </listitem>
<listitem> <listitem>
<para> <para>
<emphasis>Replace the naive HYPOT() macro with a <emphasis>Performance improvements in pg_upgrade for uses with many tables</emphasis>
standards-conformant hypotenuse function</emphasis> </para>
</listitem>
<listitem>
<para>
Reduce lock levels of CREATE TRIGGER and some ALTER
TABLE, CREATE RULE actions
</para>
</listitem>
<listitem>
<para>
Add some knowledge about prefix matches to
tsmatchsel()
</para>
</listitem>
<listitem>
<para>
Replace the naive HYPOT() macro with a
standards-conformant hypotenuse function
</para> </para>
</listitem> </listitem>
...@@ -123,9 +203,9 @@ ...@@ -123,9 +203,9 @@
<listitem> <listitem>
<para> <para>
<emphasis>Change the default value of Change the default value of
<literal>standard_conforming_strings</> to <literal>standard_conforming_strings</> to
<literal>on</></emphasis> <literal>on</>
</para> </para>
<warning> <warning>
<para> <para>
...@@ -137,7 +217,7 @@ ...@@ -137,7 +217,7 @@
<listitem> <listitem>
<para> <para>
<emphasis>Add <literal>log_file_mode</> parameter</emphasis> Add <literal>log_file_mode</> parameter
</para> </para>
<para> <para>
This allows control of the file permissions set on log files created This allows control of the file permissions set on log files created
...@@ -147,7 +227,7 @@ ...@@ -147,7 +227,7 @@
<listitem> <listitem>
<para> <para>
<emphasis>Add <literal>restart_after_crash</> parameter</emphasis> Add <literal>restart_after_crash</> parameter
</para> </para>
<para> <para>
Normally, we automatically restart after a backend crash, but in Normally, we automatically restart after a backend crash, but in
...@@ -165,29 +245,44 @@ ...@@ -165,29 +245,44 @@
<listitem> <listitem>
<para> <para>
<emphasis>Make EXPLAIN show the function call expression of a <emphasis>Allow pg_ctl to register the service in either AUTO or DEMAND start
FunctionScan plan node, but only in VERBOSE mode</emphasis> type</emphasis>
</para>
</listitem>
<listitem>
<para>
<emphasis>Support host names and host key
word <literal>all</literal>
in <filename>pg_hba.conf</filename></emphasis>
</para>
</listitem>
<listitem>
<para>
Make EXPLAIN show the function call expression of a
FunctionScan plan node, but only in VERBOSE mode
</para> </para>
</listitem> </listitem>
<listitem> <listitem>
<para> <para>
<emphasis>Make EXPLAIN print PARAM_EXEC Params as Make EXPLAIN print PARAM_EXEC Params as
the referenced expressions, rather than just $N</emphasis> the referenced expressions, rather than just $N
</para> </para>
</listitem> </listitem>
<listitem> <listitem>
<para> <para>
<emphasis>Add vacuum and analyze counters to pg_stat_*_tables Add vacuum and analyze counters to pg_stat_*_tables
views</emphasis> views
</para> </para>
</listitem> </listitem>
<listitem> <listitem>
<para> <para>
<emphasis>Add stats functions and views to provide access to a Add stats functions and views to provide access to a
transaction's own statistics counts</emphasis> transaction's own statistics counts
</para> </para>
</listitem> </listitem>
...@@ -199,8 +294,19 @@ ...@@ -199,8 +294,19 @@
<listitem> <listitem>
<para> <para>
<emphasis>Add server authentication over Unix-domain <emphasis>Add SECURITY LABEL command</emphasis>
sockets</emphasis> </para>
<para>
This is intended as infrastructure to support integration
with label-based mandatory access control systems such as
SE-Linux.
</para>
</listitem>
<listitem>
<para>
Add server authentication over Unix-domain
sockets
</para> </para>
<para> <para>
This adds a libpq connection parameter <literal>requirepeer</> that This adds a libpq connection parameter <literal>requirepeer</> that
...@@ -217,27 +323,36 @@ ...@@ -217,27 +323,36 @@
<listitem> <listitem>
<para> <para>
<emphasis>Add string functions: concat(), concat_ws(), left(), <emphasis>Accept <literal>public</literal> as a pseudo-role
right(), and reverse()</emphasis> name in <literal>has_table_privilege()</literal> and friends
to see if a particular privilege has been granted to
<literal>PUBLIC</literal></emphasis>
</para> </para>
</listitem> </listitem>
<listitem> <listitem>
<para> <para>
<emphasis>Add three-parameter forms of array_to_string and Add string functions: concat(), concat_ws(), left(),
string_to_array</emphasis> right(), and reverse()
</para> </para>
</listitem> </listitem>
<listitem> <listitem>
<para> <para>
<emphasis>Add XMLEXISTS function</emphasis> Add three-parameter forms of array_to_string and
string_to_array
</para> </para>
</listitem> </listitem>
<listitem> <listitem>
<para> <para>
<emphasis>Add xpath_exists() function</emphasis> Add XMLEXISTS function
</para>
</listitem>
<listitem>
<para>
Add xpath_exists() function
</para> </para>
<para> <para>
This is equivalent to XMLEXISTS except that it offers support for This is equivalent to XMLEXISTS except that it offers support for
...@@ -247,9 +362,9 @@ ...@@ -247,9 +362,9 @@
<listitem> <listitem>
<para> <para>
<emphasis>Add xml_is_well_formed, xml_is_well_formed_document, Add xml_is_well_formed, xml_is_well_formed_document,
xml_is_well_formed_content functions to the core XML xml_is_well_formed_content functions to the core XML
code</emphasis> code
</para> </para>
<para> <para>
These supersede a version previously offered by contrib/xml2. These supersede a version previously offered by contrib/xml2.
...@@ -264,15 +379,15 @@ ...@@ -264,15 +379,15 @@
<listitem> <listitem>
<para> <para>
<emphasis>Allow numeric to use a more compact, 2-byte header in Allow numeric to use a more compact, 2-byte header in
many cases</emphasis> many cases
</para> </para>
</listitem> </listitem>
<listitem> <listitem>
<para> <para>
<emphasis>Add support for dividing money by money (yielding a Add support for dividing money by money (yielding a
float8 result) and for casting between money and numeric</emphasis> float8 result) and for casting between money and numeric
</para> </para>
</listitem> </listitem>
...@@ -284,8 +399,8 @@ ...@@ -284,8 +399,8 @@
<listitem> <listitem>
<para> <para>
<emphasis>Add options to force quoting of all Add options to force quoting of all
identifiers</emphasis> identifiers
</para> </para>
<para> <para>
This includes a quote_all_identifiers parameter which affects the This includes a quote_all_identifiers parameter which affects the
...@@ -303,16 +418,16 @@ ...@@ -303,16 +418,16 @@
<listitem> <listitem>
<para> <para>
<emphasis>Add \conninfo command to psql, to show current connection Add \conninfo command to psql, to show current connection
info</emphasis> info
</para> </para>
</listitem> </listitem>
<listitem> <listitem>
<para> <para>
<emphasis>Extend psql's \e and \ef commands so that a line number Extend psql's \e and \ef commands so that a line number
can be specified, and the editor's cursor will be initially placed can be specified, and the editor's cursor will be initially placed
on that line</emphasis> on that line
</para> </para>
<para> <para>
To avoid assumptions about what switch the user's editor takes for To avoid assumptions about what switch the user's editor takes for
...@@ -323,16 +438,16 @@ ...@@ -323,16 +438,16 @@
<listitem> <listitem>
<para> <para>
<emphasis>Add a \sf (show function) command to psql, for those Add a \sf (show function) command to psql, for those
times when you need to look at a function but don't wish to fire up times when you need to look at a function but don't wish to fire up
an editor</emphasis> an editor
</para> </para>
</listitem> </listitem>
<listitem> <listitem>
<para> <para>
<emphasis>Make psql distinguish between unique indices and unique Make psql distinguish between unique indices and unique
constraints in \d printout</emphasis> constraints in \d printout
</para> </para>
</listitem> </listitem>
...@@ -346,9 +461,9 @@ ...@@ -346,9 +461,9 @@
<listitem> <listitem>
<para> <para>
<emphasis>Modify the handling of RAISE without parameters so that Modify the handling of RAISE without parameters so that
the error it throws can be caught in the same places that could the error it throws can be caught in the same places that could
catch an ordinary RAISE ERROR in the same location</emphasis> catch an ordinary RAISE ERROR in the same location
</para> </para>
<para> <para>
The previous coding insisted on throwing the error from the block The previous coding insisted on throwing the error from the block
...@@ -359,7 +474,7 @@ ...@@ -359,7 +474,7 @@
<listitem> <listitem>
<para> <para>
<emphasis>Remove ancient PL/pgSQL line numbering hack</emphasis> Remove ancient PL/pgSQL line numbering hack
</para> </para>
<para> <para>
PL/pgSQL used to count the second line of the function body as PL/pgSQL used to count the second line of the function body as
...@@ -381,37 +496,43 @@ ...@@ -381,37 +496,43 @@
<listitem> <listitem>
<para> <para>
<emphasis>Add the ability to compute per-statement latencies (ie, <emphasis>Updates to contrib/isn ISBN tables</emphasis>
average execution times) to pgbench</emphasis> </para>
</listitem>
<listitem>
<para>
Add the ability to compute per-statement latencies (ie,
average execution times) to pgbench
</para> </para>
</listitem> </listitem>
<listitem> <listitem>
<para> <para>
<emphasis>Teach levenshtein() about multi-byte Teach levenshtein() about multi-byte
characters</emphasis> characters
</para> </para>
</listitem> </listitem>
<listitem> <listitem>
<para> <para>
<emphasis>Add btree_gist support for searching on <quote>not Add btree_gist support for searching on <quote>not
equals</quote></emphasis> equals</quote>
</para> </para>
</listitem> </listitem>
<listitem> <listitem>
<para> <para>
<emphasis>Add ssl_cipher() and ssl_version() functions to Add ssl_cipher() and ssl_version() functions to
contrib/sslinfo</emphasis> contrib/sslinfo
</para> </para>
</listitem> </listitem>
<listitem> <listitem>
<para> <para>
<emphasis>Remove the arbitrary (and undocumented) limit on the Remove the arbitrary (and undocumented) limit on the
number of parameter=value pairs that can be handled by number of parameter=value pairs that can be handled by
xslt_process()</emphasis> xslt_process()
</para> </para>
</listitem> </listitem>
...@@ -423,8 +544,8 @@ ...@@ -423,8 +544,8 @@
<listitem> <listitem>
<para> <para>
<emphasis>Include the backend ID in the relpath of temporary Include the backend ID in the relpath of temporary
relations</emphasis> relations
</para> </para>
<para> <para>
This allows us to reliably remove all leftover temporary relation This allows us to reliably remove all leftover temporary relation
...@@ -436,45 +557,45 @@ ...@@ -436,45 +557,45 @@
<listitem> <listitem>
<para> <para>
<emphasis>Rewrite COMMENT ON <replaceable>object</> code for better Rewrite COMMENT ON <replaceable>object</> code for better
modularity, and add necessary locking</emphasis> modularity, and add necessary locking
</para> </para>
</listitem> </listitem>
<listitem> <listitem>
<para> <para>
<emphasis>Add a hook in ExecCheckRTPerms() for eventual use by Add a hook in ExecCheckRTPerms() for eventual use by
external security-checking modules</emphasis> external security-checking modules
</para> </para>
</listitem> </listitem>
<listitem> <listitem>
<para> <para>
<emphasis>Standardize names and calling conventions of Standardize names and calling conventions of
get_whatever_oid functions</emphasis> get_whatever_oid functions
</para> </para>
</listitem> </listitem>
<listitem> <listitem>
<para> <para>
<emphasis>Make NestLoop plan nodes pass outer-relation variables Make NestLoop plan nodes pass outer-relation variables
into their inner relation using the general PARAM_EXEC executor into their inner relation using the general PARAM_EXEC executor
parameter mechanism, rather than the ad-hoc kluge of passing the parameter mechanism, rather than the ad-hoc kluge of passing the
outer tuple down through ExecReScan</emphasis> outer tuple down through ExecReScan
</para> </para>
</listitem> </listitem>
<listitem> <listitem>
<para> <para>
<emphasis>Make details of the Numeric representation private to Make details of the Numeric representation private to
numeric.c</emphasis> numeric.c
</para> </para>
</listitem> </listitem>
<listitem> <listitem>
<para> <para>
<emphasis>Suppress some compiler warnings from Suppress some compiler warnings from
<literal>clang</></emphasis> <literal>clang</>
</para> </para>
</listitem> </listitem>
......
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