blob: 544a9663d77278a6970b2ac3dd3d8b4b9a88c979 (
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
127
128
|
<!--
doc/src/sgml/ref/drop_transform.sgml
PostgreSQL documentation
-->
<refentry id="sql-droptransform">
<indexterm zone="sql-droptransform">
<primary>DROP TRANSFORM</primary>
</indexterm>
<refmeta>
<refentrytitle>DROP TRANSFORM</refentrytitle>
<manvolnum>7</manvolnum>
<refmiscinfo>SQL - Language Statements</refmiscinfo>
</refmeta>
<refnamediv>
<refname>DROP TRANSFORM</refname>
<refpurpose>remove a transform</refpurpose>
</refnamediv>
<refsynopsisdiv>
<synopsis>
DROP TRANSFORM [ IF EXISTS ] FOR <replaceable>type_name</replaceable> LANGUAGE <replaceable>lang_name</replaceable> [ CASCADE | RESTRICT ]
</synopsis>
</refsynopsisdiv>
<refsect1 id="sql-droptransform-description">
<title>Description</title>
<para>
<command>DROP TRANSFORM</command> removes a previously defined transform.
</para>
<para>
To be able to drop a transform, you must own the type and the language.
These are the same privileges that are required to create a transform.
</para>
</refsect1>
<refsect1>
<title>Parameters</title>
<variablelist>
<varlistentry>
<term><literal>IF EXISTS</literal></term>
<listitem>
<para>
Do not throw an error if the transform does not exist. A notice is issued
in this case.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable>type_name</replaceable></term>
<listitem>
<para>
The name of the data type of the transform.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable>lang_name</replaceable></term>
<listitem>
<para>
The name of the language of the transform.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>CASCADE</literal></term>
<listitem>
<para>
Automatically drop objects that depend on the transform,
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 transform if any objects depend on it. This is the
default.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1 id="sql-droptransform-examples">
<title>Examples</title>
<para>
To drop the transform for type <type>hstore</type> and language
<literal>plpython3u</literal>:
<programlisting>
DROP TRANSFORM FOR hstore LANGUAGE plpython3u;
</programlisting></para>
</refsect1>
<refsect1 id="sql-droptransform-compat">
<title>Compatibility</title>
<para>
This form of <command>DROP TRANSFORM</command> is a
<productname>PostgreSQL</productname> extension. See <xref
linkend="sql-createtransform"/> for details.
</para>
</refsect1>
<refsect1>
<title>See Also</title>
<simplelist type="inline">
<member><xref linkend="sql-createtransform"/></member>
</simplelist>
</refsect1>
</refentry>
|
