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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE section PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
<section id="db_row_t" xmlns:xi="http://www.w3.org/2001/XInclude">
<sectioninfo>
<revhistory>
<revision>
<revnumber>$Revision$</revnumber>
<date>$Date$</date>
</revision>
</revhistory>
</sectioninfo>
<title>Type <type>db_row_t</type></title>
<para>
This type represents one row in a database table. In other words, the
row is an array of <type>db_val_t</type> variables, where each
<type>db_val_t</type> variable represents exactly one cell in the
table.
</para>
<programlisting>
typedef struct db_row {
db_val_t* values; /* Array of values in the row */
int n; /* Number of values in the row */
} db_val_t;
</programlisting>
<itemizedlist>
<listitem>
<para>
<function>ROW_VALUES(row)</function> Macro.
</para>
<para>
Use this macro to get pointer to array of <type>db_val_t</type>
structures.
</para>
<example>
<title>ROW_VALUES Macro</title>
<programlisting>
...
db_val_t* v = ROW_VALUES(row);
if (VAL_TYPE(v) == DB_INT)
...
</programlisting>
</example>
</listitem>
<listitem>
<para>
<function>ROW_N(row)</function> Macro.
</para>
<para>
Use this macro to get number of cells in a row.
</para>
<example>
<title>ROW_N Macro</title>
<programlisting>
<![CDATA[
...
db_val_t* val = ROW_VALUES(row);
for(i = 0; i < ROW_N(row); i++) {
switch(VAL_TYPE(val + i)) {
case DB_INT: ...; break;
case DB_DOUBLE: ...; break;
...
}
}
...
]]>
</programlisting>
</example>
</listitem>
</itemizedlist>
</section>
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