blob: 484e5d9b11a1521e65ac5871f7f7450530bbd03c (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
|
<!--
doc/src/sgml/ref/drop_extension.sgml
PostgreSQL documentation
-->
<refentry id="sql-dropextension">
<indexterm zone="sql-dropextension">
<primary>DROP EXTENSION</primary>
</indexterm>
<refmeta>
<refentrytitle>DROP EXTENSION</refentrytitle>
<manvolnum>7</manvolnum>
<refmiscinfo>SQL - Language Statements</refmiscinfo>
</refmeta>
<refnamediv>
<refname>DROP EXTENSION</refname>
<refpurpose>remove an extension</refpurpose>
</refnamediv>
<refsynopsisdiv>
<synopsis>
DROP EXTENSION [ IF EXISTS ] <replaceable class="parameter">name</replaceable> [, ...] [ CASCADE | RESTRICT ]
</synopsis>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para>
<command>DROP EXTENSION</command> removes extensions from the database.
Dropping an extension causes its member objects, and other explicitly
dependent routines (see <xref linkend="sql-alterroutine"/>,
the <literal>DEPENDS ON EXTENSION <replaceable>extension_name</replaceable>
</literal> action), to be dropped as well.
</para>
<para>
You must own the extension to use <command>DROP EXTENSION</command>.
</para>
</refsect1>
<refsect1>
<title>Parameters</title>
<variablelist>
<varlistentry>
<term><literal>IF EXISTS</literal></term>
<listitem>
<para>
Do not throw an error if the extension does not exist. A notice is issued
in this case.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable class="parameter">name</replaceable></term>
<listitem>
<para>
The name of an installed extension.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>CASCADE</literal></term>
<listitem>
<para>
Automatically drop objects that depend on the extension,
and in turn all objects that depend on those objects
(see <xref linkend="ddl-depend"/>).
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>RESTRICT</literal></term>
<listitem>
<para>
This option prevents the specified extensions from being dropped if
other objects, besides these extensions, their members, and their
explicitly dependent routines, depend on them. This is the default.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Examples</title>
<para>
To remove the extension <literal>hstore</literal> from the current
database:
<programlisting>
DROP EXTENSION hstore;
</programlisting>
This command will fail if any of <literal>hstore</literal>'s objects
are in use in the database, for example if any tables have columns
of the <type>hstore</type> type. Add the <literal>CASCADE</literal> option to
forcibly remove those dependent objects as well.
</para>
</refsect1>
<refsect1>
<title>Compatibility</title>
<para>
<command>DROP EXTENSION</command> is a <productname>PostgreSQL</productname>
extension.
</para>
</refsect1>
<refsect1>
<title>See Also</title>
<simplelist type="inline">
<member><xref linkend="sql-createextension"/></member>
<member><xref linkend="sql-alterextension"/></member>
</simplelist>
</refsect1>
</refentry>
|
