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<?xml version="1.0" encoding="ISO-8859-1"?>
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<refentry id="fn_md5">
<refmeta>
<refentrytitle>md5</refentrytitle>
<refmiscinfo>hash</refmiscinfo>
</refmeta>
<refnamediv>
<refname>md5</refname>
<refpurpose>returns the md5 checksum of its argument</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis id="fsyn_md5">
<funcprototype id="fproto_md5">
<funcdef>checksum <function>md5</function></funcdef>
<paramdef>in <parameter>str</parameter> varchar</paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1 id="desc_md5"><title>Description</title>
<para><function>md5</function> calculates the MD5 checksum of its argument.
The md5 message digest algorithm is defined in
<ulink url="http://www.ietf.org/rfc/rfc1321.txt">RFC1321</ulink>.</para>
</refsect1>
<refsect1 id="params_md5"><title>Parameters</title>
<refsect2><title>str</title>
<para>A <type>string</type> or <type>string_output</type> containing the data
for calculating the message digest.</para>
</refsect2>
</refsect1>
<refsect1 id="ret_md5"><title>Return Types</title>
<para>A <type>string</type> of 32 lowercase alphanumeric characters.</para>
</refsect1>
<refsect1 id="errors_md5"><title>Errors</title>
<table><title>Errors signalled by</title>
<tgroup cols="4">
<thead><row><entry>SQLState</entry><entry>Error Code</entry><entry>Error Text</entry><entry>Description</entry></row></thead>
<tbody>
<row>
<entry><errorcode></errorcode></entry>
<entry><errorcode></errorcode></entry>
<entry><errorname></errorname></entry>
<entry></entry>
</row>
</tbody>
</tgroup>
</table>
</refsect1>
<refsect1 id="examples_md5"><title>Examples</title>
<example id="ex_md5"><title>Simple example</title>
<screen>SQL> select md5 ('blah blah');
callret
VARCHAR
_______________________________________________________________________________
ae661d08d1ca1576a6efcb82b7bc502f
1 Rows. -- 4 msec.
</screen>
</example>
</refsect1>
<refsect1 id="seealso_md5"><title>See Also</title>
<para><ulink url="http://www.ietf.org/rfc/rfc1321.txt">RFC1321</ulink></para>
</refsect1>
</refentry>
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