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<?xml version="1.0" encoding="ISO-8859-1"?>
<!--
-
- This file is part of the OpenLink Software Virtuoso Open-Source (VOS)
- project.
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- Copyright (C) 1998-2018 OpenLink Software
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- 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
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- WITHOUT ANY WARRANTY; without even the implied warranty of
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- General Public License for more details.
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- 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
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-->
<!-- REMOVE FROM INDEX bug 1690 -->
<refentry id="fn__row">
<refmeta>
<refentrytitle>_ROW</refentrytitle>
<refmiscinfo>sql</refmiscinfo>
</refmeta>
<refnamediv>
<refname>_ROW</refname>
<refpurpose>Special column consisting of a copy of the row's internal representation.</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis id="fsyn__row">
<funcprototype id="fproto__row">
<funcdef><function>_ROW</function></funcdef>
<paramdef></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1 id="desc_row"><title>Description</title>
<para>
There is a special column <parameter>_ROW</parameter> that can be selected from any table.
The value of this column is a special string that contains all the column
values; i.e., a copy of the row's internal representation.
This string can then be decomposed into the table and columns with the
<function>row_table()</function> and <function>row_column()</function> functions.
</para>
<para>
If the user does not have table-wide select privileges to the table
mentioned in the FROM clause of the SELECT that is accessing
<parameter>_ROW</parameter>, the code <programlisting>Diagnostics
42000</programlisting> is returned as the SQL STATE for all operations
involving <parameter>_ROW</parameter>. Separate privileges on all columns
do not suffice.
</para>
<para>
The <parameter>_ROW</parameter> is not updatable.
</para>
<example id="ex__row">
<!-- <title>Example:</title> -->
<programlisting>
select _ROW from FOO;
select T1._ROW from XX, YY T1 where ....
</programlisting>
</example>
</refsect1>
<refsect1 id="seealso__row">
<title>See Also</title>
<para>
<link linkend="fn_row_column"><function>row_column()</function></link>
<link linkend="fn_row_identity"><function>row_identity()</function></link>
<link linkend="fn_row_table"><function>row_table()</function></link>
</para>
</refsect1>
</refentry>
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