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<refentry id="vc_expression">
<refmeta>
<refentrytitle>expression</refentrytitle>
<refmiscinfo>vspx_control</refmiscinfo>
</refmeta>
<refnamediv>
<refname>expression</refname>
<refpurpose>An SQL statement that generates a rowset for v:data-source.</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis id="vc_syn_expression">
<funcprototype id="vc_proto_expression">
<funcdef>
<<function>expression</function> <attribute>
<parameter>language</parameter> (optional) </attribute>
<attribute>
<parameter>debug-srcfile</parameter> (optional) </attribute>
<attribute>
<parameter>debug-srcline</parameter> (optional) </attribute>
<attribute>
<parameter>debug-log</parameter> (optional) </attribute>
/></funcdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1 id="vc_desc_expression">
<title>Description</title>
<para>A container for SQL statement generating a rowset or table name (see data-source).</para>
</refsect1>
<refsect1 id="vc_attrs_expression">
<title>Attributes</title>
<formalpara>
<title>language = <link linkend="vc_type_SqlName">SqlName</link>
</title>
<para>Denotes the type of language,
currently only SQL expressions are supported, see 'expression-type' attribute
of the data-source control.</para>
</formalpara>
<formalpara>
<title>debug-srcfile</title>
<para>URI of the source document where the tag comes from.</para>
</formalpara>
<formalpara>
<title>debug-srcline</title>
<para>Line number in the source document where the tag comes from.</para>
</formalpara>
<formalpara>
<title>debug-log</title>
<para>This defines what sort of data are saved to the debugging log.
</para>
</formalpara>
</refsect1>
</refentry>
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