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Postgres FD Implementation
Commit 85c25fdb authored by Tom Lane's avatar Tom Lane
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Desultory review of 9.5 release notes. 

Minor corrections and clarifications.  Notably, for stuff that got moved
out of contrib, make sure it's documented somewhere other than "Additional
Modules".

I'm sure these need more work, but that's all I have time for today.
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doc/src/sgml/release-9.5.sgml
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......@@ -54,75 +54,90 @@
<listitem>
<para>
Adjust <link linkend="functions-comparison">operator precedence</>
Adjust <link linkend="sql-precedence">operator precedence</>
to match the <acronym>SQL</> standard (Tom Lane)
</para>
<para>
"&lt;" and "&gt;" now have the same precedence as "&lt;="
"&gt;=" and "&lt;&gt;", and <literal>IS</> now has lower
precedence. <literal>NOT</> now also has symmetric precedence.
The <acronym>GUC</> <varname>operator_precedence_warning</> can be
enabled to warn about queries where the precedence has changed.
The precedence of <literal>&lt;=</literal>, <literal>&gt;=</literal>
and <literal>&lt;&gt;</literal> has been reduced to match that of
<literal>&lt;</literal>, <literal>&gt;</literal>
and <literal>=</literal>. The precedence of <literal>IS</> tests
(e.g., <replaceable>x</> <literal>IS NULL</>) has been reduced to be
just below these six comparison operators.
Also, multi-keyword operators beginning with <literal>NOT</> now have
the precedence of their base operator (for example, <literal>NOT
BETWEEN</> now has the same precedence as <literal>BETWEEN</>) whereas
before they had inconsistent precedence, behaving like <literal>NOT</>
with respect to their left operand but like their base operator with
respect to their right operand. The new configuration
parameter <xref linkend="guc-operator-precedence-warning"> can be
enabled to warn about queries in which these precedence changes result
in different parsing choices.
</para>
</listitem>
<listitem>
<para>
Use cast conversions for <application>PL/pgSQL</> type conversions,
rather than converting to and from text (Tom Lane)
Use assignment cast behavior for data type conversions
in <application>PL/pgSQL</> assignments, rather than converting to and
from text (Tom Lane)
</para>
<para>
This causes conversions of booleans to strings to
return <literal>true</> or <literal>false</>, not
<literal>t</>/<literal>f</>.
This change causes conversions of booleans to strings to
produce <literal>true</> or <literal>false</>, not <literal>t</>
or <literal>f</>. Other type conversions may succeed in more cases
than before; for example, assigning a numeric value <literal>3.9</> to
an integer variable will now assign 4 rather than failing. If no
assignment-grade cast is defined for the particular source and
destination types, <application>PL/pgSQL</> will fall back to its old
I/O conversion behavior.
</para>
</listitem>
<listitem>
<para>
Allow special characters in <link linkend="libpq-envars">server
startup option values</> to be escaped with a backslash (Andres
Freund)
Allow characters in <link linkend="libpq-connect-options">server
command-line options</> to be escaped with a backslash (Andres Freund)
</para>
<para>
This allows characters like spaces to be passed inside option values.
Passing a backslash now requires supplying a double-backslash.
Formerly, spaces in the options string always separated options, so
there was no way to include a space in an option value. Including
a backslash in an option value now requires writing <literal>\\</>.
</para>
</listitem>
<listitem>
<para>
Set the default value of <link
linkend="gssapi-auth"><varname>include_realm</></> to not remove
the <acronym>GSS</> and <acronym>SSPI</> realm from the principal
(Stephen Frost)
Change the default value of <link
linkend="gssapi-auth"><varname>include_realm</></> to 1, so that
by default the realm is not removed from a <acronym>GSS</>
or <acronym>SSPI</> principal name (Stephen Frost)
</para>
</listitem>
<listitem>
<para>
Fix <link linkend="SQL-REASSIGN-OWNED"><command>REASSIGN</></>
and <link linkend="SQL-ALTERTABLE"><command>ALTER OWNER TO</></>
to properly reassign ownership of types, foreign data wrappers,
and foreign servers (Bruce Momjian)
Fix <link linkend="SQL-REASSIGN-OWNED"><command>REASSIGN OWNED</></>
and <link linkend="SQL-ALTERTYPE"><command>ALTER OWNER TO</></>
to properly update permissions lists (ACLs) when changing ownership of
types, foreign data wrappers, and foreign servers (Bruce Momjian)
</para>
</listitem>
<listitem>
<para>
Remove server-side <acronym>GUC</> <varname>autocommit</>, which
Remove server configuration parameter <varname>autocommit</>, which
was already deprecated and non-operational (Tom Lane)
</para>
</listitem>
<listitem>
<para>
Remove <link
linkend="catalog-pg-authid"><structname>pg_authid</>.<structname>rolcatupdate</></>,
as it had no purpose (Adam Brightwell)
Remove <link linkend="catalog-pg-authid"><structname>pg_authid</></>'s
<structfield>rolcatupdate</> field, as it had no value (Adam Brightwell)
</para>
</listitem>
......@@ -134,9 +149,9 @@
<title>Changes</title>
<para>
Below you will find a detailed account of the changes between
Below you will find a detailed account of the changes between
<productname>PostgreSQL</productname> 9.5 and the previous major
release.
release.
</para>
<sect3>
......@@ -184,22 +199,21 @@
<listitem>
<para>
Add <acronym>GUC</> <link
linkend="guc-gin-pending-list-limit"><varname>gin_pending_list_limit</></>
Add configuration parameter <xref linkend="guc-gin-pending-list-limit">
to control the size of <acronym>GIN</> pending lists (Fujii Masao)
</para>
<para>
Previously this was controlled by <link
linkend="guc-work-mem"><varname>work_mem</></>. This can also
be set as an index storage parameter.
Previously the list size was controlled
by <xref linkend="guc-work-mem">. This can also be set as an index
storage parameter.
</para>
</listitem>
<listitem>
<para>
Issue a warning during the creation of <link
linkend="SQL-CREATEINDEX">hash</> indexes because they are not
linkend="indexes-types">hash</> indexes because they are not
crash-safe (Bruce Momjian)
</para>
</listitem>
......@@ -237,8 +251,8 @@
<listitem>
<para>
Improve concurrency of <link linkend="guc-shared-buffers">shared
buffer</> replacement (Robert Haas, Amit Kapila)
Improve concurrency of shared buffer replacement
(Robert Haas, Amit Kapila)
</para>
</listitem>
......@@ -269,11 +283,6 @@
Speed up <acronym>CRC</> (cyclic redundancy check) computations
(Abhijit Menon-Sen, Heikki Linnakangas)
</para>
<para>
Also use <acronym>CPU</> instructions for <acronym>CRC</>
calculations, if supported
</para>
</listitem>
</itemizedlist>
......@@ -298,25 +307,23 @@
<listitem>
<para>
Add <acronym>GUC</> variable <link
linkend="guc-cluster-name"><varname>cluster_name</></> (Thomas
Munro)
Add new configuration parameter <xref linkend="guc-cluster-name">
(Thomas Munro)
</para>
<para>
This string, set in <link
This string, typically set in <link
linkend="config-setting-configuration-file"><filename>postgresql.conf</></>,
allows clients to query the cluster name. This name also appears
in the process title, allowing for easier grouping of processes
belonging to the same cluster.
allows clients to identify the cluster. This name also appears
in the process title of all server processes, allowing for easier
identification of processes belonging to the same cluster.
</para>
</listitem>
<listitem>
<para>
Prevent non-superusers from changing <link
linkend="guc-log-disconnections"><varname>log_disconnections</></>
on connection startup (Fujii Masao)
Prevent non-superusers from changing <xref
linkend="guc-log-disconnections"> on connection startup (Fujii Masao)
</para>
</listitem>
......@@ -337,7 +344,7 @@
</para>
<para>
Their presence replaces checks against the certificate's
When they are present, this replaces checks against the certificate's
<quote>Common Name</>.
</para>
</listitem>
......@@ -359,7 +366,7 @@
<para>
While <link linkend="libpq-pqgetssl"><function>PQgetssl()</></>
can still be used to then call <productname>OpenSSL</>
can still be used to call <productname>OpenSSL</>
functions, <function>PQsslAttribute()</> returns <acronym>SSL</>
information in an <acronym>SSL</>-implementation-independent way.
(Future versions of libpq might support other <acronym>SSL</>
......@@ -369,7 +376,7 @@
<listitem>
<para>
Have <application>libpq</> honor any <productname>OpenSSL</>
Make <application>libpq</> honor any <productname>OpenSSL</>
thread callbacks (Jan Urbanski)
</para>
......@@ -389,10 +396,9 @@
<listitem>
<para>
Replace <varname>checkpoint_segments</> with <link
linkend="guc-min-wal-size"><varname>min_wal_size</></> and
<link linkend="guc-max-wal-size"><varname>max_wal_size</></>
(Heikki Linnakangas)
Replace configuration parameter <varname>checkpoint_segments</>
with <xref linkend="guc-min-wal-size">
and <xref linkend="guc-max-wal-size"> (Heikki Linnakangas)
</para>
<para>
......@@ -403,18 +409,17 @@
<listitem>
<para>
Add <acronym>GUC</> <link
linkend="guc-wal-compression"><varname>wal_compression</></> to
enable compression of full page images stored in <acronym>WAL</>
Add configuration parameter <xref linkend="guc-wal-compression"> to
control compression of full page images stored in <acronym>WAL</>
(Rahila Syed, Michael Paquier)
</para>
</listitem>
<listitem>
<para>
Allow the recording of transaction
commit timestamps when <acronym>GUC</> <link
linkend="guc-track-commit-timestamp"><varname>track_commit_timestamp</></>
Allow recording of transaction
commit timestamps when configuration parameter <xref
linkend="guc-track-commit-timestamp">
is enabled (&Aacute;lvaro Herrera, Petr Jel&iacute;nek)
</para>
......@@ -427,10 +432,8 @@
<listitem>
<para>
Allow <link
linkend="guc-local-preload-libraries"><varname>local_preload_libraries</></>
to be set by <command>ALTER ROLE SET</> (Peter Eisentraut,
Kyotaro Horiguchi)
Allow <xref linkend="guc-local-preload-libraries"> to be set
by <command>ALTER ROLE SET</> (Peter Eisentraut, Kyotaro Horiguchi)
</para>
</listitem>
......@@ -443,24 +446,22 @@
<listitem>
<para>
Make <acronym>GUC</> <link
linkend="guc-debug-assertions"><varname>debug_assertions</></>
Make configuration parameter <xref linkend="guc-debug-assertions">
read-only (Andres Freund)
</para>
<para>
This means that assertions can no longer be turned
off once enabled at compile-time, allowing for more
efficient code optimization. This also removed the <link
off if they were enabled at compile time, allowing for more
efficient code optimization. This change also removed the <link
linkend="app-postgres-options">postgres</> <option>-A</> option.
</para>
</listitem>
<listitem>
<para>
Allow setting <link
linkend="guc-effective-io-concurrency"><varname>effective_io_concurrency</></>
on systems where it has no effect (Peter Eisentraut)
Allow setting <xref linkend="guc-effective-io-concurrency"> on
systems where it has no effect (Peter Eisentraut)
</para>
</listitem>
......@@ -470,12 +471,12 @@
linkend="linux-memory-overcommit"><envar>PG_OOM_ADJUST_FILE</></>
and <link
linkend="linux-memory-overcommit"><envar>PG_OOM_ADJUST_VALUE</></>
to control Linux <acronym>OOM</> killer (Gurjeet Singh)
to help control the Linux <acronym>OOM</> killer (Gurjeet Singh)
</para>
<para>
The previous <acronym>OOM</> control involved a compile-time
option.
The previous <acronym>OOM</> control infrastructure involved a
compile-time option.
</para>
</listitem>
......@@ -528,15 +529,13 @@
</para>
<para>
<acronym>GUC</> <varname>pause_at_recovery_target</> was also
removed.
This replaces the old parameter <varname>pause_at_recovery_target</>.
</para>
</listitem>
<listitem>
<para>
Add <link linkend="guc-archive-mode"><varname>archive_mode</></>
Add new <xref linkend="guc-archive-mode"> value
<literal>always</> to allow standbys to always archive received
<acronym>WAL</> files (Fujii Masao)
</para>
......@@ -544,10 +543,10 @@
<listitem>
<para>
Add <acronym>GUC</> <link
linkend="guc-wal-retrieve-retry-interval"><varname>wal_retrieve_retry_interval</></>
to control <acronym>WAL</> read retry after failure (Alexey
Vasiliev, Michael Paquier)
Add configuration
parameter <xref linkend="guc-wal-retrieve-retry-interval"> to
control <acronym>WAL</> read retry after failure
(Alexey Vasiliev, Michael Paquier)
</para>
<para>
......@@ -564,23 +563,22 @@
<listitem>
<para>
Add <acronym>GUC</> <link
linkend="guc-log-replication-commands"><varname>log_replication_commands</></>
Add configuration parameter <xref
linkend="guc-log-replication-commands">
to log replication commands (Fujii Masao)
</para>
<para>
By default, replication commands, e.g. <link
linkend="protocol-replication"><literal>IDENTIFY_SYSTEM</></>,
are not logged, even when <link
linkend="guc-log-statement"><varname>log_statement</></> is set
are not logged, even when <xref linkend="guc-log-statement"> is set
to <literal>all</>.
</para>
</listitem>
<listitem>
<para>
Allow the <link linkend="pg-replication-origin-create">labeling</>
Allow <link linkend="pg-replication-origin-create">labeling</>
of the origin of logical replication changes (Andres Freund)
</para>
......@@ -591,7 +589,7 @@
<listitem>
<para>
Report the backends holding replication slots in <link
Report the processes holding replication slots in <link
linkend="catalog-pg-replication-slots"><structname>pg_replication_slots</></>
(Craig Ringer)
</para>
......@@ -896,10 +894,8 @@
</para>
<para>
This allows the creation of local foreign tables definitions
that match the remote table structure. Currently, only the
<link linkend="postgres-fdw"><application>postgres_fdw</></>
foreign data wrapper supports this feature.
This command allows automatic creation of local foreign tables
that match the structure of existing tables on a remote server.
</para>
</listitem>
......@@ -922,9 +918,11 @@
</para>
<para>
These checks are assumed to be enforced on the remote server,
and are not checked locally. However, they are considered for
optimization and constraint-exclusion checking.
These constraints are assumed to be enforced on the remote server,
and are not enforced locally. However, they are assumed to hold for
purposes of query optimization, such
as <link linkend="ddl-partitioning-constraint-exclusion">constraint
exclusion</>.
</para>
</listitem>
......@@ -946,9 +944,8 @@
<listitem>
<para>
Add <link
linkend="pg-event-trigger-ddl-command-end-functions"><function>pg_event_trigger_ddl_commands</></>
set-returning function, which returns <acronym>DDL</> activity
Add a set-returning function <link
linkend="pg-event-trigger-ddl-command-end-functions"><function>pg_event_trigger_ddl_commands()</></>, which returns <acronym>DDL</> activity
associated with event triggers (&Aacute;lvaro Herrera)
</para>
</listitem>
......@@ -1015,8 +1012,8 @@
</para>
<para>
Previously the namespace was not returned, leading to invalid
<type>XML</>.
Previously the namespace was not returned, potentially leading to
invalid <type>XML</>.
</para>
</listitem>
......@@ -1029,7 +1026,7 @@
<listitem>
<para>
Tighten specification of <link
Tighten syntax of <link
linkend="datatype-interval-input"><type>INTERVAL</></> precision
specifications (Bruce Momjian)
</para>
......@@ -1061,19 +1058,19 @@
Add <type>JSONB</> functions <link
linkend="functions-json-processing-table"><function>jsonb_set()</></>
and <link
linkend="functions-json-processing-table"><function>jsonb_pretty</></>
linkend="functions-json-processing-table"><function>jsonb_pretty()</></>
(Dmitry Dolgov, Andrew Dunstan, Petr Jel&iacute;nek)
</para>
</listitem>
<listitem>
<para>
Add several generator functions for <type>JSONB</> that exist
for <type>JSON</> (Andrew Dunstan)
Add several generator functions for <type>JSONB</> that already
existed for <type>JSON</> (Andrew Dunstan)
</para>
<para>
The functions are <link
These are <link
linkend="functions-json-creation-table"><function>to_jsonb()</></>,
<link
linkend="functions-json-creation-table"><function>jsonb_object()</></>,
......@@ -1182,10 +1179,10 @@
<listitem>
<para>
Add <link
Add a <link
linkend="functions-math-func-table"><function>width_bucket()</></>
which supports any sortable data type and non-uniform bucket widths
(Petr Jel&iacute;nek)
variant that supports any sortable data type and non-uniform bucket
widths (Petr Jel&iacute;nek)
</para>
</listitem>
......@@ -1196,9 +1193,10 @@
</para>
<para>
User-defined <literal>=&gt;</> operators have been issuing
warnings since Postgres 9.0, and were removed in hstore in 9.2.
Previously only <literal>:=</> could be used.
Previously only <literal>:=</> could be used. This requires removing
the possibility for <literal>=&gt;</> to be a user-defined operator.
Creation of user-defined <literal>=&gt;</> operators has been issuing
warnings since Postgres 9.0.
</para>
</listitem>
......@@ -1236,18 +1234,18 @@
<listitem>
<para>
Loosen security checks for viewing <link
Loosen security checks for viewing queries in <link
linkend="pg-stat-activity-view"><structname>pg_stat_activity</></>,
<link
executing <link
linkend="functions-admin-signal-table"><function>pg_cancel_backend()</></>,
and <link
linkend="functions-admin-signal-table"><function>pg_terminate_backend</></>
and executing <link
linkend="functions-admin-signal-table"><function>pg_terminate_backend()</></>
(Stephen Frost)
</para>
<para>
Now, role membership is sufficient; previously only the same
role could perform such operations.
Now, role membership is sufficient; previously only the same
role could perform these operations.
</para>
</listitem>
......@@ -1347,17 +1345,17 @@
<listitem>
<para>
Add specification of conversion routines to/from <acronym>SQL</>
data types to procedural languages data types (Peter Eisentraut)
Allow specification of conversion routines between <acronym>SQL</>
data types and data types of procedural languages (Peter Eisentraut)
</para>
<para>
This adds new commands <link
This change adds new commands <link
linkend="SQL-CREATETRANSFORM"><command>CREATE</></>/<link
linkend="SQL-DROPTRANSFORM"><command>DROP TRANSFORM</></>.
This also adds transformations between <link
This also adds optional transformations between the <link
linkend="hstore"><application>hstore</></> and <link
linkend="ltree"><application>ltree</></> to/from <link
linkend="ltree"><application>ltree</></> types to/from <link
linkend="plperl"><application>PL/Perl</></> and <link
linkend="plpython"><application>PL/Python</></>.
</para>
......@@ -1413,6 +1411,14 @@
</para>
</listitem>
<listitem>
<para>
Add <link linkend="app-pgrewind"><application>pg_rewind</></>,
which allows re-synchronizing a master server after failback
(Heikki Linnakangas)
</para>
</listitem>
<listitem>
<para>
Allow <link
......@@ -1456,11 +1462,17 @@
<listitem>
<para>
Have <link
linkend="app-pgbasebackup"><application>pg_basebackup</></> use
a tablespace mapping file with the <application>tar</> format,
to handle file paths of 100+ characters in length and sybolic
links on <systemitem class="osname">MS Windows</> (Amit Kapila)
Make <link linkend="app-pgbasebackup"><application>pg_basebackup</></>
use a tablespace mapping file when using <application>tar</> format,
to support symbolic links and file paths of 100+ characters in length
on <systemitem class="osname">MS Windows</> (Amit Kapila)
</para>
</listitem>
<listitem>
<para>
Add <link linkend="pgxlogdump"><application>pg_xlogdump</></> option
<option>--stats</> to display summary statistics (Abhijit Menon-Sen)
</para>
</listitem>
......@@ -1515,7 +1527,7 @@
<para>
Add <application>psql</> setting <link
linkend="APP-PSQL-meta-commands"><varname>pager_min_lines</></>
setting to control pager invocation (Andrew Dunstan)
to control pager invocation (Andrew Dunstan)
</para>
</listitem>
......@@ -1529,7 +1541,7 @@
<listitem>
<para>
Add <application>psql</> tab completion when setting the
<varname>search_path</> variable (Jeff Janes)
<xref linkend="guc-search-path"> variable (Jeff Janes)
</para>
<para>
......@@ -1539,7 +1551,7 @@
<listitem>
<para>
Improve <application>psql</> tab-completion for triggers and rules
Improve <application>psql</>'s tab completion for triggers and rules
(Andreas Karlsson)
</para>
</listitem>
......@@ -1581,7 +1593,7 @@
<listitem>
<para>
Allow <application>psql</> <command>\watch</> to output
Allow <application>psql</>'s <command>\watch</> to output
<command>\timing</> information (Fujii Masao)
</para>
......@@ -1608,8 +1620,8 @@
<listitem>
<para>
Allow tab completion of <application>psql</> <literal>\c</>
role names (Ian Barwick)
Allow tab completion of role names
in <application>psql</> <literal>\c</> commands (Ian Barwick)
</para>
</listitem>
......@@ -1662,7 +1674,7 @@
<listitem>
<para>
Change <application>pg_ctl</> default shutdown mode from
Change <application>pg_ctl</>'s default shutdown mode from
<literal>smart</> to <literal>fast</> (Bruce Momjian)
</para>
</listitem>
......@@ -1740,6 +1752,47 @@
</sect4>
<sect4>
<title><xref linkend="pgbench"></title>
<itemizedlist>
<listitem>
<para>
Move pgbench from <filename>contrib</> to <filename>src/bin</>
(Peter Eisentraut)
</para>
</listitem>
<listitem>
<para>
Allow counting of pgbench transactions that take over a specified
amount of time (Fabien Coelho)
</para>
<para>
This is controlled by new <option>--latency-limit</> option.
</para>
</listitem>
<listitem>
<para>
Allow pgbench to generate Gaussian/exponential distributions
using <command>\setrandom</> (Kondo Mitsumasa, Fabien Coelho)
</para>
</listitem>
<listitem>
<para>
Allow <application>pgbench</>'s <command>\set</> command to handle
multi-operator expressions (Robert Haas, Fabien Coelho)
</para>
</listitem>
</itemizedlist>
</sect4>
</sect3>
<sect3>
......@@ -1797,7 +1850,8 @@
<listitem>
<para>
Improve dynahash capabilities (Teodor Sigaev, Tom Lane)
Improve <function>hash_create()</>'s API for selecting
simple-binary-key hash functions (Teodor Sigaev, Tom Lane)
</para>
</listitem>
......@@ -1841,15 +1895,16 @@
<listitem>
<para>
Change columns <link
Change index opclass for columns <link
linkend="catalog-pg-seclabel"><structname>pg_seclabel</></>.<structname>provider</>
and <link
linkend="catalog-pg-seclabel"><structname>pg_shseclabel</></>.<structname>provider</>
to <type>TEXT</> (Tom Lane)
linkend="catalog-pg-shseclabel"><structname>pg_shseclabel</></>.<structname>provider</>
to be <literal>text_pattern_ops</> (Tom Lane)
</para>
<para>
This allows these columns to store 64+ characters.
This avoids possible problems with these indexes when different
databases of a cluster have different default collations.
</para>
</listitem>
......@@ -1933,14 +1988,6 @@
<itemizedlist>
<listitem>
<para>
Add <link linkend="app-pgrewind"><application>pg_rewind</></>,
which allows re-synchronizing a master server after failback
(Heikki Linnakangas)
</para>
</listitem>
<listitem>
<para>
Add statistics for minimum, maximum,
......@@ -1994,14 +2041,7 @@
<listitem>
<para>
Add <link linkend="pgxlogdump"><application>pg_xlogdump</></> option
<option>--stats</> to display summary statistics (Abhijit Menon-Sen)
</para>
</listitem>
<listitem>
<para>
Allow <link linkend="GIN"><acronym>GIN</></>
Add <link linkend="GIN"><acronym>GIN</></>
index inspection functions to <link
linkend="pageinspect"><application>pageinspect</></> (Heikki
Linnakangas, Peter Geoghegan, Michael Paquier)
......@@ -2031,51 +2071,15 @@
from <filename>contrib</> to <filename>src/test/modules</>
(&Aacute;lvaro Herrera)
</para>
<para>
These modules are only meant for server testing, so they do not need
to be built or installed when packaging <productname>PostgreSQL</>.
</para>
</listitem>
</itemizedlist>
<sect4>
<title><xref linkend="pgbench"></title>
<itemizedlist>
<listitem>
<para>
Move pgbench from <filename>contrib</> to <filename>src/bin</>
(Peter Eisentraut)
</para>
</listitem>
<listitem>
<para>
Allow counting of pgbench transactions that take over a specified
amount of time (Fabien Coelho)
</para>
<para>
This is controlled by new <option>--latency-limit</> option.
</para>
</listitem>
<listitem>
<para>
Allow pgbench to generate Gaussian/exponential distributions
using <command>\setrandom</> (Kondo Mitsumasa, Fabien Coelho)
</para>
</listitem>
<listitem>
<para>
Allow <application>pgbench</>'s <command>\set</> command to handle
multi-operator expressions (Robert Haas, Fabien Coelho)
</para>
</listitem>
</itemizedlist>
</sect4>
</sect3>
</sect2>
......
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