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Commitf0811a7

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Merge the last few variable.c configuration variables into the generic
GUC support. It's now possible to set datestyle, timezone, andclient_encoding from postgresql.conf and per-database or per-usersettings. Also, implement rollback of SET commands that occur in atransaction that later fails. Create a SET LOCAL var = value syntaxthat sets the variable only for the duration of the current transaction.All per previous discussions in pghackers.
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‎doc/src/sgml/ref/alter_database.sgml‎

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<!--
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/alter_database.sgml,v 1.2 2002/04/23 02:07:15 tgl Exp $
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/alter_database.sgml,v 1.3 2002/05/17 01:19:16 tgl Exp $
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PostgreSQL documentation
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-->
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@@ -28,10 +28,9 @@ ALTER DATABASE <replaceable class="PARAMETER">name</replaceable> RESET <replacea
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<command>ALTER DATABASE</command> is used to change the session
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default of a run-time configuration variable for a
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<productname>PostgreSQL</productname> database. Whenever a new
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session is subsequently started in that database, <literal>SET
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<replaceable>variable</replaceable> TO
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<replaceable>value</replaceable></literal> is effectively executed
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before the start of the session. The database-specific default
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session is subsequently started in that database, the specified
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value becomes the session default value.
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The database-specific default
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overrides whatever setting is present in <filename>postgresql.conf</>
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or has been received from the postmaster.
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</para>
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configuration variable to the given value. If
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<replaceable>value</replaceable> is <literal>DEFAULT</literal>
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or, equivalently, <literal>RESET</literal> is used, the
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database-specific variable setting is removed and the default
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database-specific variable setting is removed and the system-wide
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default
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setting will be inherited in new sessions. Use <literal>RESET
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ALL</literal> to clear all settings.
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</para>

‎doc/src/sgml/ref/alter_user.sgml‎

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<!--
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/alter_user.sgml,v 1.21 2002/03/2219:20:36 petere Exp $
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/alter_user.sgml,v 1.22 2002/05/17 01:19:16 tgl Exp $
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PostgreSQL documentation
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-->
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@@ -48,14 +48,13 @@ ALTER USER <replaceable class="PARAMETER">username</replaceable> RESET <replacea
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</para>
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<para>
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The second and the third variant change a user's session defaultof
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The second and the third variant change a user's session defaultfor
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a specified configuration variable. Whenever the user subsequently
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starts a new session, <literal>SET
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<replaceable>variable</replaceable> TO
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<replaceable>value</replaceable></literal> is effectively executed
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before the start of the session. Ordinary users can change their
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own session defaults. Superusers can change anyone's session
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defaults.
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starts a new session, the specified value becomes the session default,
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overriding whatever setting is present in <filename>postgresql.conf</>
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or has been received from the postmaster.
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Ordinary users can change their own session defaults.
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Superusers can change anyone's session defaults.
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</para>
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<refsect2>
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<term><replaceable>value</replaceable></term>
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<listitem>
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<para>
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Set this user's session defaultof the specified configuration
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Set this user's session defaultfor the specified configuration
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variable to the given value. If
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<replaceable>value</replaceable> is <literal>DEFAULT</literal>
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or, equivalently, <literal>RESET</literal> is used, the
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user-specific variable setting is removed and the user will
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inherit the default setting in new sessions. Use
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inherit thesystem-widedefault setting in new sessions. Use
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<literal>RESET ALL</literal> to clear all settings.
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</para>
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‎doc/src/sgml/ref/reset.sgml‎

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<!--
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/reset.sgml,v 1.13 2001/12/08 03:24:39 thomas Exp $
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/reset.sgml,v 1.14 2002/05/17 01:19:16 tgl Exp $
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PostgreSQL documentation
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-->
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<term>ALL</term>
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<listitem>
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<para>
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Resets all run-time parameters to default values.
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Resets allsettablerun-time parameters to default values.
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</para>
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</listitem>
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</varlistentry>
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<command>RESET</command> restores run-time parameters to their
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default values. Refer to
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<xref linkend="sql-set" endterm="sql-set-title">
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for details. <command>RESET</command> is an alternateform for
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for details. <command>RESET</command> is an alternatespelling for
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<synopsis>
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SET <replaceable class="parameter">variable</replaceable> TO DEFAULT
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</synopsis>
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The default value is defined as the value that the variable would
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have had, had no <command>SET</> ever been issued for it in the
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current session. The actual source of this value might be a
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compiled-in default, the postmaster's configuration file or command-line
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switches, or per-database or per-user default settings. See the
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<citetitle>Administrator's Guide</citetitle> for details.
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</para>
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</refsect1>
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