blob: b18faf391752d5f9aeb4fbef41fe2fb607148820 (
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
|
<!--
doc/src/sgml/ref/drop_domain.sgml
PostgreSQL documentation
-->
<refentry id="sql-dropdomain">
<indexterm zone="sql-dropdomain">
<primary>DROP DOMAIN</primary>
</indexterm>
<refmeta>
<refentrytitle>DROP DOMAIN</refentrytitle>
<manvolnum>7</manvolnum>
<refmiscinfo>SQL - Language Statements</refmiscinfo>
</refmeta>
<refnamediv>
<refname>DROP DOMAIN</refname>
<refpurpose>remove a domain</refpurpose>
</refnamediv>
<refsynopsisdiv>
<synopsis>
DROP DOMAIN [ IF EXISTS ] <replaceable class="parameter">name</replaceable> [, ...] [ CASCADE | RESTRICT ]
</synopsis>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para>
<command>DROP DOMAIN</command> removes a domain. Only the owner of
a domain can remove it.
</para>
</refsect1>
<refsect1>
<title>Parameters</title>
<variablelist>
<varlistentry>
<term><literal>IF EXISTS</literal></term>
<listitem>
<para>
Do not throw an error if the domain 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 (optionally schema-qualified) of an existing domain.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>CASCADE</literal></term>
<listitem>
<para>
Automatically drop objects that depend on the domain (such as
table columns),
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>
Refuse to drop the domain if any objects depend on it. This is
the default.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1 id="sql-dropdomain-examples">
<title>Examples</title>
<para>
To remove the domain <type>box</type>:
<programlisting>
DROP DOMAIN box;
</programlisting></para>
</refsect1>
<refsect1 id="sql-dropdomain-compatibility">
<title>Compatibility</title>
<para>
This command conforms to the SQL standard, except for the
<literal>IF EXISTS</literal> option, which is a <productname>PostgreSQL</productname>
extension.
</para>
</refsect1>
<refsect1 id="sql-dropdomain-see-also">
<title>See Also</title>
<simplelist type="inline">
<member><xref linkend="sql-createdomain"/></member>
<member><xref linkend="sql-alterdomain"/></member>
</simplelist>
</refsect1>
</refentry>
|
