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Core support for "extensions", which are packages of SQL objects.

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This patch adds the server infrastructure to support extensions.
There is still one significant loose end, namely how to make it play nice
with pg_upgrade, so I am not yet committing the changes that would make
all the contrib modules depend on this feature.

In passing, fix a disturbingly large amount of breakage in
AlterObjectNamespace() and callers.

Dimitri Fontaine, reviewed by Anssi Kääriäinen,
Itagaki Takahiro, Tom Lane, and numerous others
This commit is contained in:
Tom Lane
2011-02-08 16:08:41 -05:00
parent 414c5a2ea6
commit d9572c4e3b
69 changed files with 4206 additions and 547 deletions
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doc/src/sgml/ref/alter_extension.sgml Normal file
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<!--
doc/src/sgml/ref/alter_extension.sgml
PostgreSQL documentation
-->
<refentry id="SQL-ALTEREXTENSION">
<refmeta>
<refentrytitle>ALTER EXTENSION</refentrytitle>
<manvolnum>7</manvolnum>
<refmiscinfo>SQL - Language Statements</refmiscinfo>
</refmeta>
<refnamediv>
<refname>ALTER EXTENSION</refname>
<refpurpose>
change the definition of an extension
</refpurpose>
</refnamediv>
<indexterm zone="sql-alterextension">
<primary>ALTER EXTENSION</primary>
</indexterm>
<refsynopsisdiv>
<synopsis>
ALTER EXTENSION <replaceable class="PARAMETER">name</replaceable> SET SCHEMA <replaceable class="PARAMETER">new_schema</replaceable>
</synopsis>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para>
<command>ALTER EXTENSION</command> changes the definition of an existing extension.
Currently there is only one subform:
<variablelist>
<varlistentry>
<term><literal>SET SCHEMA</literal></term>
<listitem>
<para>
This form moves the extension's objects into another schema. The
extension has to be <firstterm>relocatable</> for this command to
succeed. See <xref linkend="extend-extensions"> for details.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1>
<title>Parameters</title>
<para>
<variablelist>
<varlistentry>
<term><replaceable class="PARAMETER">name</replaceable></term>
<listitem>
<para>
The name of an installed extension.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable class="PARAMETER">new_schema</replaceable></term>
<listitem>
<para>
The new schema for the extension.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1>
<title>Examples</title>
<para>
To change the schema of the extension <literal>hstore</literal>
to <literal>utils</literal>:
<programlisting>
ALTER EXTENSION hstore SET SCHEMA utils;
</programlisting>
</para>
</refsect1>
<refsect1 id="SQL-ALTEREXTENSION-see-also">
<title>See Also</title>
<simplelist type="inline">
<member><xref linkend="sql-createextension"></member>
<member><xref linkend="sql-dropextension"></member>
</simplelist>
</refsect1>
</refentry>