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><H1
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>XCIX. MySQL Functions (PDO_MYSQL)</H1
><DIV
CLASS="PARTINTRO"
><A
NAME="AEN132044"
></A
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="pdo-mysql.intro"
>Introdução</A
></H1
><P
> PDO_MYSQL is a driver that implements the <A
HREF="ref.pdo.html"
>PHP
Data Objects (PDO) interface</A
>
to enable access from PHP to MySQL 3.x, 4.x and 5.x databases.
</P
><P
> PDO_MYSQL will take advantage of native prepared statement support
present in MySQL 4.1 and higher. If you're using an older version of the
mysql client libraries, PDO will emulate them for you.
</P
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>Atenção</B
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><P
> Beware: Some MySQL table types (storage engines) do not support transactions. When
writing transactional database code using a table type that does not support
transactions, MySQL will pretend that a transaction was initiated successfully.
In addition, any DDL queries issued will implicitly
commit any pending transactions.
</P
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><DIV
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><H1
CLASS="section"
><A
NAME="pdo-mysql.constants"
>Constantes pré-definidas</A
></H1
><P
>As constantes abaixo são definidas por
este drive, e somente estarão disponíveis quando esta extensão for compilada no
PHP ou carregada dinamicamente em tempo de execução. Em adição, estas
constantes especificas do drive somente devem ser usadas se você estive usando este drive.
Usar atributos especificos do mysql com o driver postgree pode resultar em
um funcionamento não esperado. <B
CLASS="function"
>PDO::getAttribute()</B
> deve ser usado para
obter o atributo <TT
CLASS="constant"
><B
>PDO_ATTR_DRIVER_NAME</B
></TT
> para se certificar do
driver, se o seu código puder ser usado com vários drivers.</P
><P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><TT
CLASS="constant"
><B
>PDO::MYSQL_ATTR_USE_BUFFERED_QUERY</B
></TT
>
(<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
> If this attribute is set to <TT
CLASS="constant"
><B
>TRUE</B
></TT
> on a
<B
CLASS="classname"
>PDOStatement</B
>, the MySQL driver will use the
buffered versions of the MySQL API. If you're writing portable code, you
should use <B
CLASS="function"
>PDOStatement::fetchAll()</B
> instead.
</P
><P
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><A
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></A
><P
><B
>Exemplo 1. Forcing queries to be buffered in mysql</B
></P
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><TD
><code><font color="#000000">
<font color="#0000BB"><?php<br /></font><font color="#007700">if (</font><font color="#0000BB">$db</font><font color="#007700">-></font><font color="#0000BB">getAttribute</font><font color="#007700">(</font><font color="#0000BB">PDO</font><font color="#007700">::</font><font color="#0000BB">ATTR_DRIVER_NAME</font><font color="#007700">) == </font><font color="#DD0000">'mysql'</font><font color="#007700">) {<br /> </font><font color="#0000BB">$stmt </font><font color="#007700">= </font><font color="#0000BB">$db</font><font color="#007700">-></font><font color="#0000BB">prepare</font><font color="#007700">(</font><font color="#DD0000">'select * from foo'</font><font color="#007700">,<br /> array(</font><font color="#0000BB">PDO</font><font color="#007700">::</font><font color="#0000BB">MYSQL_ATTR_USE_BUFFERED_QUERY </font><font color="#007700">=> </font><font color="#0000BB">true</font><font color="#007700">));<br />} else {<br /> die(</font><font color="#DD0000">"my application only works with mysql; I should use \$stmt->fetchAll() instead"</font><font color="#007700">);<br />}<br /></font><font color="#0000BB">?></font>
</font>
</code></TD
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></TD
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>
</P
></DD
><DT
><TT
CLASS="constant"
><B
>PDO::MYSQL_ATTR_LOCAL_INFILE</B
></TT
>
(<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
> Enable <TT
CLASS="literal"
>LOAD LOCAL INFILE</TT
>.
</P
></DD
><DT
><TT
CLASS="constant"
><B
>PDO::MYSQL_ATTR_INIT_COMMAND</B
></TT
>
(<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
> Command to execute when connecting to the MySQL server. Will
automatically be re-executed when reconnecting.
</P
></DD
><DT
><TT
CLASS="constant"
><B
>PDO::MYSQL_ATTR_READ_DEFAULT_FILE</B
></TT
>
(<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
> Read options from the named option file instead of from
<TT
CLASS="filename"
>my.cnf</TT
>.
</P
></DD
><DT
><TT
CLASS="constant"
><B
>PDO::MYSQL_ATTR_READ_DEFAULT_GROUP</B
></TT
>
(<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
> Read options from the named group from <TT
CLASS="filename"
>my.cnf</TT
> or the
file specified with <TT
CLASS="constant"
><B
>MYSQL_READ_DEFAULT_FILE</B
></TT
>.
</P
></DD
><DT
><TT
CLASS="constant"
><B
>PDO::MYSQL_ATTR_MAX_BUFFER_SIZE</B
></TT
>
(<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
> Maximum buffer size. Defaults to 1 MiB.
</P
></DD
><DT
><TT
CLASS="constant"
><B
>PDO::MYSQL_ATTR_DIRECT_QUERY</B
></TT
>
(<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
> Perform direct queries, don't use prepared statements.
</P
></DD
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><B
>Índice</B
></DT
><DT
><A
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>PDO_MYSQL DSN</A
> -- Connecting to MySQL databases</DT
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