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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.2 $ -->
<refentry id="function.maxdb-query">
<refnamediv>
<refname>maxdb_query</refname>
<refname>maxdb->query</refname>
<refpurpose>Performs a query on the database</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<para>Procedural style:</para>
<methodsynopsis>
<type>mixed</type><methodname>maxdb_query</methodname>
<methodparam><type>resource</type><parameter>link</parameter></methodparam>
<methodparam><type>string</type><parameter>query</parameter></methodparam>
<methodparam choice='opt'><type>int</type><parameter>resultmode</parameter></methodparam>
</methodsynopsis>
<para>Object oriented style (method):</para>
<classsynopsis>
<ooclass><classname>maxdb</classname></ooclass>
<methodsynopsis>
<type>mixed</type>
<methodname>query</methodname>
<methodparam><type>string</type><parameter>query</parameter></methodparam>
</methodsynopsis>
</classsynopsis>
<para>
The <function>maxdb_query</function> function is used to simplify the
act of performing a query against the database represented by the
<parameter>link</parameter> parameter.
</para>
</refsect1>
<refsect1>
<title>Return values</title>
<para>
&return.success; For <literal>SELECT, SHOW, DESCRIBE</literal> or
<literal>EXPLAIN</literal> <function>maxdb_query</function> will return
a result resource.
</para>
</refsect1>
<refsect1>
<title>See also</title>
<para>
<function>maxdb_real_query</function>,
<function>maxdb_multi_query</function>,
<function>maxdb_free_result</function>
</para>
</refsect1>
<refsect1>
<title>Example</title>
<example>
<title>Object oriented style</title>
<programlisting role="php">
<![CDATA[
<?php
$maxdb = new maxdb("localhost", "MONA", "RED", "DEMODB");
/* check connection */
if (maxdb_connect_errno()) {
printf("Connect failed: %s\n", maxdb_connect_error());
exit();
}
/* Create table doesn't return a resultset */
if ($maxdb->query("CREATE TABLE temp.mycity LIKE hotel.city") === TRUE) {
printf("Table mycity successfully created.\n");
}
/* Select queries return a resultset */
if ($result = $maxdb->query("SELECT name FROM hotel.city")) {
printf("Select returned %d rows.\n", $result->num_rows);
/* free result set */
$result->close();
}
/* If we have to retrieve large amount of data we use MAXDB_USE_RESULT */
if ($result = $maxdb->query("SELECT * FROM hotel.city", MAXDB_USE_RESULT)) {
$result->close();
}
$maxdb->close();
?>
]]>
</programlisting>
</example>
<example>
<title>Procedural style</title>
<programlisting role="php">
<![CDATA[
<?php
$link = maxdb_connect("localhost", "MONA", "RED", "DEMODB");
/* check connection */
if (maxdb_connect_errno()) {
printf("Connect failed: %s\n", maxdb_connect_error());
exit();
}
/* Create table doesn't return a resultset */
if (maxdb_query($link, "CREATE TABLE temp.mycity LIKE hotel.city") === TRUE) {
printf("Table mycity successfully created.\n");
}
/* Select queries return a resultset */
if ($result = maxdb_query($link, "SELECT name FROM hotel.city")) {
printf("Select returned %d rows.\n", maxdb_num_rows($result));
/* free result set */
maxdb_free_result($result);
}
/* If we have to retrieve large amount of data we use MAXDB_USE_RESULT */
if ($result = maxdb_query($link, "SELECT * FROM hotel.city", MAXDB_USE_RESULT)) {
maxdb_free_result($result);
}
maxdb_close($link);
?>
]]>
</programlisting>
</example>
<para>
The above examples would produce the following output:
</para>
<screen>
<![CDATA[
Table mycity successfully created.
Select returned 25 rows.
]]>
</screen>
</refsect1>
</refentry>
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