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https://github.com/sigmasternchen/php-doc-en
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c030e2adf7
- All id attributes are now xml:id - Add docbook namespace to all root elements - Replace <ulink /> with <link xlink:href /> - Minor markup fixes here and there git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@238160 c90b9560-bf6c-de11-be94-00142212c4b1
106 lines
3.2 KiB
XML
106 lines
3.2 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!-- $Revision: 1.11 $ -->
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<refentry xml:id="function.mysql-unbuffered-query" xmlns="http://docbook.org/ns/docbook">
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<refnamediv>
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<refname>mysql_unbuffered_query</refname>
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<refpurpose>Send an SQL query to MySQL, without fetching and buffering the result rows</refpurpose>
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</refnamediv>
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<refsect1 role="description">
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&reftitle.description;
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<methodsynopsis>
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<type>resource</type><methodname>mysql_unbuffered_query</methodname>
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<methodparam><type>string</type><parameter>query</parameter></methodparam>
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<methodparam choice="opt"><type>resource</type><parameter>link_identifier</parameter></methodparam>
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</methodsynopsis>
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<para>
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<function>mysql_unbuffered_query</function> sends a SQL query
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<parameter>query</parameter> to MySQL, without fetching and
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buffering the result rows automatically, as
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<function>mysql_query</function> does. On the one hand, this
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saves a considerable amount of memory with SQL queries that
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produce large result sets. On the other hand, you can start
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working on the result set immediately after the first row has
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been retrieved: you don't have to wait until the complete SQL
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query has been performed. When using multiple DB-connects, you
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have to specify the optional parameter
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<parameter>link_identifier</parameter>.
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</para>
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</refsect1>
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<refsect1 role="parameters">
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&reftitle.parameters;
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<para>
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<variablelist>
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<varlistentry>
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<term><parameter>query</parameter></term>
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<listitem>
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<para>
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A SQL query
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</para>
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</listitem>
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</varlistentry>
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&mysql.linkid.description;
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</variablelist>
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</para>
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</refsect1>
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<refsect1 role="returnvalues">
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&reftitle.returnvalues;
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<para>
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For SELECT, SHOW, DESCRIBE or EXPLAIN statements,
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<function>mysql_unbuffered_query</function>
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returns a <type>resource</type> on success, or &false; on
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error.
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</para>
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<para>
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For other type of SQL statements, UPDATE, DELETE, DROP, etc,
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<function>mysql_unbuffered_query</function> returns &true; on success
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or &false; on error.
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</para>
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</refsect1>
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<refsect1 role="notes">
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&reftitle.notes;
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<note>
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<para>
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The benefits of <function>mysql_unbuffered_query</function> come
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at a cost: You cannot use <function>mysql_num_rows</function> and
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<function>mysql_data_seek</function> on a result set returned from
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<function>mysql_unbuffered_query</function>. You also have to
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fetch all result rows from an unbuffered SQL query, before you
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can send a new SQL query to MySQL.
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</para>
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</note>
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</refsect1>
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<refsect1 role="seealso">
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&reftitle.seealso;
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<para>
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<simplelist>
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<member><function>mysql_query</function></member>
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</simplelist>
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</para>
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</refsect1>
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</refentry>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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indent-tabs-mode:nil
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sgml-parent-document:nil
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sgml-default-dtd-file:"../../../../manual.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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vim600: syn=xml fen fdm=syntax fdl=2 si
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vim: et tw=78 syn=sgml
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vi: ts=1 sw=1
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-->
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