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Add ALTER TABLESPACE ... MOVE command

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This adds a 'MOVE' sub-command to ALTER TABLESPACE which allows moving sets of
objects from one tablespace to another.  This can be extremely handy and avoids
a lot of error-prone scripting.  ALTER TABLESPACE ... MOVE will only move
objects the user owns, will notify the user if no objects were found, and can
be used to move ALL objects or specific types of objects (TABLES, INDEXES, or
MATERIALIZED VIEWS).
This commit is contained in:
Stephen Frost
2014-01-18 18:56:40 -05:00
parent 6f25c62d78
commit 76e91b38ba
13 changed files with 340 additions and 8 deletions
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59
doc/src/sgml/ref/alter_tablespace.sgml
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@ -12,7 +12,7 @@ PostgreSQL documentation
<refnamediv>
<refname>ALTER TABLESPACE</refname>
<refpurpose>change the definition of a tablespace</refpurpose>
<refpurpose>change the definition of a tablespace or affect objects of a tablespace</refpurpose>
</refnamediv>
<indexterm zone="sql-altertablespace">
@ -25,6 +25,7 @@ ALTER TABLESPACE <replaceable>name</replaceable> RENAME TO <replaceable>new_name
ALTER TABLESPACE <replaceable>name</replaceable> OWNER TO <replaceable>new_owner</replaceable>
ALTER TABLESPACE <replaceable>name</replaceable> SET ( <replaceable class="PARAMETER">tablespace_option</replaceable> = <replaceable class="PARAMETER">value</replaceable> [, ... ] )
ALTER TABLESPACE <replaceable>name</replaceable> RESET ( <replaceable class="PARAMETER">tablespace_option</replaceable> [, ... ] )
ALTER TABLESPACE <replaceable>name</replaceable> MOVE { ALL | TABLES | INDEXES | MATERIALIZED VIEWS } TO <replaceable>new_tablespace</replaceable> [ NOWAIT ]
</synopsis>
</refsynopsisdiv>
@ -32,15 +33,34 @@ ALTER TABLESPACE <replaceable>name</replaceable> RESET ( <replaceable class="PAR
<title>Description</title>
<para>
<command>ALTER TABLESPACE</command> changes the definition of
a tablespace.
<command>ALTER TABLESPACE</command> can be used to change the definition of
a tablespace or to migrate all of the objects in the current database which
are owned by the user out of a given tablespace.
</para>
<para>
You must own the tablespace to use <command>ALTER TABLESPACE</>.
You must own the tablespace to change the definition of a tablespace.
To alter the owner, you must also be a direct or indirect member of the new
owning role.
(Note that superusers have these privileges automatically.)
Users may use ALTER TABLESPACE ... MOVE to move either ALL of their objects,
or just TABLES, INDEXES, or MATERIALIZED VIEWS, but they must have CREATE
rights on the new tablespace and only objects, directly or indirectly, owned
by the user will be moved. Note that the superuser is considered an owner
of all objects and therefore an ALTER TABLESPACE ... MOVE ALL issued by the
superuser will move all objects in the current database which are in the
tablespace.
All objects to be moved will be locked immediately by the command. The
NOWAIT option, if specified, will cause the command to fail if it is unable
to acquire the locks.
System catalogs will not be moved by this command- individuals wishing to
move a whole database should use ALTER DATABASE, or call ALTER TABLE on the
individual system catalogs. Note that relations in <literal>information_schema</literal>
will be moved, just as any other normal database objects, if the user is the
superuser or considered an owner of the relations in <literal>information_schema</literal>.
</para>
</refsect1>
@ -94,6 +114,30 @@ ALTER TABLESPACE <replaceable>name</replaceable> RESET ( <replaceable class="PAR
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable class="parameter">new_tablespace</replaceable></term>
<listitem>
<para>
The name of the tablespace to move objects into. The user must have
CREATE rights on the new tablespace to move objects into that
tablespace, unless the tablespace being moved into is the default
tablespace for the database connected to.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable class="parameter">NOWAIT</replaceable></term>
<listitem>
<para>
The NOWAIT option causes the ALTER TABLESPACE command to fail immediately
if it is unable to acquire the necessary lock on all of the objects being
move.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
@ -111,6 +155,13 @@ ALTER TABLESPACE index_space RENAME TO fast_raid;
Change the owner of tablespace <literal>index_space</literal>:
<programlisting>
ALTER TABLESPACE index_space OWNER TO mary;
</programlisting></para>
<para>
Move all of the objects which I own from the default tablespace to
the <literal>fast_raid</literal> tablespace:
<programlisting>
ALTER TABLESPACE pg_default MOVE ALL TO fast_raid;
</programlisting></para>
</refsect1>