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
|
<?xml version="1.0" encoding="ISO-8859-1"?>
<!--
-
- This file is part of the OpenLink Software Virtuoso Open-Source (VOS)
- project.
-
- Copyright (C) 1998-2018 OpenLink Software
-
- This project is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by the
- Free Software Foundation; only version 2 of the License, dated June 1991.
-
- This program is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License along
- with this program; if not, write to the Free Software Foundation, Inc.,
- 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-
-
-->
<refentry id="fn_regexp_like">
<refmeta>
<refentrytitle>regexp_like</refentrytitle>
<refmiscinfo>string</refmiscinfo>
</refmeta>
<refnamediv>
<refname>regexp_like</refname>
<refpurpose>Allows a like comparison using regular-expression.</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis id="fsyn_regexp_like">
<funcprototype id="fproto_regexp_like">
<funcdef>integer <function>regexp_like</function></funcdef>
<paramdef>in <parameter>source_string</parameter> any</paramdef>
<paramdef>in <parameter>pattern</parameter> any</paramdef>
<paramdef><optional>in <parameter>match_parameter</parameter> integer</optional></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1 id="desc_regexp_like"><title>Description</title>
<para>The source_string supports character datatypes (CHAR, VARCHAR2, CLOB,
NCHAR, NVARCHAR2, and NCLOB but not LONG). The pattern parameter is another
name for the regular expression. match_parameter allows optional parameters such
as handling the newline character, retaining multiline formatting, and providing
control over case-sensitivity. </para>
</refsect1>
<refsect1 id="params_regexp_like"><title>Parameters</title>
<refsect2><title>source_string</title>
<para>Source string</para>
</refsect2>
<refsect2><title>pattern</title>
<para>The regular expression to match. The following special classes are supported:</para>
<simplelist>
<member>[:alpha:] Alphabetic characters</member>
<member>[:lower:] Lowercase alphabetic characters</member>
<member>[:upper:] Uppercase alphabetic characters</member>
<member>[:digit:] Numeric digits</member>
<member>[:alnum:] Alphanumeric characters</member>
<member>[:space:] Space characters (nonprinting), such as carriage return, newline, vertical tab, and form feed</member>
<member>[:punct:] Punctuation characters</member>
<member>[:cntrl:] Control characters (nonprinting)</member>
<member>[:print:] Printable characters</member>
</simplelist>
</refsect2>
<refsect2><title>match_parameter</title>
<para>This is null by default.</para></refsect2>
</refsect1>
<refsect1 id="examples_regexp_like"><title>Examples</title>
<example id="ex_regexp_like">
<title>Simple Use</title>
<para>The following SQL query's WHERE clause shows the REGEXP_LIKE operator,
which searches the ZIP column for a pattern that satisfies the regular expression
[^[:digit:]]. It will retrieve those rows in the ZIPCODE table for which the ZIP
column values contain any character that is not a numeric digit.</para>
<programlisting><![CDATA[
SELECT postalcode FROM demo.demo.customers
WHERE REGEXP_LIKE(postalcode, '[^[:digit:]]')
PostalCode
==========
WA1 1DP
S-958 22
T2F 8M4
EC2 5NT
05432-043
.
.
]]></programlisting>
</example>
</refsect1>
<refsect1 id="seealso_regexp_like"><title>See Also</title>
<para><link linkend="fn_regexp_match"><function>regexp_match()</function></link></para>
<para><link linkend="fn_regexp_parse"><function>regexp_parse()</function></link></para>
<para><link linkend="fn_regexp_instr"><function>regexp_instr()</function></link></para>
<para><link linkend="fn_regexp_replace"><function>regexp_replace()</function></link></para>
<para><link linkend="fn_regexp_substr"><function>regexp_substr()</function></link></para>
</refsect1>
</refentry>
|
