PDO_INFORMIX DSN
PDO is much better option for calling procedures, views or triggers of mysql 5.x versions from PHP instead of using mysqli extension. Following is a simple demo script which can help anybody on how to call and use mysql procedures through php
try {
$dbh = new PDO('mysql:host=xxx;port=xxx;dbname=xxx', 'xxx', 'xxx', array( PDO::ATTR_PERSISTENT => false));
$stmt = $dbh->prepare("CALL getname()");
// call the stored procedure
$stmt->execute();
echo "<B>outputting...</B><BR>";
while ($rs = $stmt->fetch(PDO::FETCH_OBJ)) {
echo "output: ".$rs->name."<BR>";
}
echo "<BR><B>".date("r")."</B>";
} catch (PDOException $e) {
print "Error!: " . $e->getMessage() . "<br/>";
die();
}
MySQL Functions (PDO_MYSQL)
Introdução
PDO_MYSQL é um driver que implementa a interface PHP Data Objects (PDO) para acesso do PHP ao MySQL 3.x, 4.x and 5.x.
PDO_MYSQL tem vantagens do nativo suporte a prepared statement presente no MySQL 4.1 e superior. Se você está usando um versão antiga da biblioteca do mysql client, PDO irá emular para você.
Aviso
Cuidado: Alguns tipos de table do MySQL (storage engines) não suportam transações. Quando escrevendo código para um banco de dados transacional onde o tipo de tabela não suporta transações, MySQL irá pretender que a transação foi inicializada com sucesso. Adicionalmente, qualquer DDL queries serão implicitamente aceitas sem pedir confirmação.
Constantes pré-definidas
As constantes abaixo são definidas por
este driver, e somente estarão disponíveis quando esta extensão for compilada no
PHP ou carregada dinamicamente em tempo de execução. Em adição, estas
constantes especificas do drive somente devem ser usadas se você estive usando este drive.
Usar atributos especificos do mysql com o driver postgree pode resultar em
um funcionamento não esperado. PDO::getAttribute() deve ser usado para
obter o atributo PDO_ATTR_DRIVER_NAME para se certificar do
driver, se o seu código puder ser usado com vários drivers.
-
PDO::MYSQL_ATTR_USE_BUFFERED_QUERY(integer) -
Se este atributo é definido para
TRUEem uma PDOStatement, o driver MySQL irá usar a versão bufferizada da MySQL API. Se você está escrevendo um código portável, você deveria usar PDOStatement::fetchAll().Exemplo #1 Forçando queries para ser bufferizadas no mysql
<?php
if ($db->getAttribute(PDO::ATTR_DRIVER_NAME) == 'mysql') {
$stmt = $db->prepare('select * from foo',
array(PDO::MYSQL_ATTR_USE_BUFFERED_QUERY => true));
} else {
die("my application only works with mysql; I should use \$stmt->fetchAll() instead");
}
?> -
PDO::MYSQL_ATTR_LOCAL_INFILE(integer) -
Enable LOAD LOCAL INFILE.
-
PDO::MYSQL_ATTR_INIT_COMMAND(integer) -
Comando para executar quando conectado ao servidor MySQL. Irá automaticamente ser reexecutado quando reconectar.
-
PDO::MYSQL_ATTR_READ_DEFAULT_FILE(integer) -
Lê opções do nomeado arquivo de opções ao invés do my.cnf.
-
PDO::MYSQL_ATTR_READ_DEFAULT_GROUP(integer) -
Lê opções do nomeado group para my.cnf ou o arquivo especificado com
MYSQL_READ_DEFAULT_FILE. -
PDO::MYSQL_ATTR_MAX_BUFFER_SIZE(integer) -
Tamanho máximo do buffer. Padrão é 1 MiB.
-
PDO::MYSQL_ATTR_DIRECT_QUERY(integer) -
Executa queries diretamente, não usa prepared statements.
Índice
- PDO_MYSQL DSN — Conectando a bancos de dados MySQL
add a note
User Contributed Notes
MySQL (PDO) - [11 notes]
dibakar at talash dot net ¶
6 years ago
konrads dot smelkovs at gmail dot com ¶
5 years ago
A note for the eager:
There is no way how to get returned row count from an executed prepared statement without fetching the rows.
davey at php dot net ¶
5 years ago
To use "PDO::MYSQL_ATTR_USE_BUFFERED_QUERY" you should call
PDO::setAttribute("PDO::MYSQL_ATTR_USE_BUFFERED_QUERY", true);
It will not work when passed into PDO::prepare()
- Davey
david at manifestwebdesign dot com ¶
1 year ago
The SSL options are silently ignored in PHP 5.3.8, see https://bugs.php.net/bug.php?id=55870
Looks like it's addressed upstream, I just want to save others the hour and a half I just wasted :)
curt at webmasterbond dot com ¶
2 years ago
Today's PHP snapshot now has SSL support for PDO. Follow the directions here ( http://dev.mysql.com/doc/refman/5.0/en/secure-create-certs.html ) to set up MySQL and then use the following connection options:
<?php
$pdo = new PDO(
'mysql:host=hostname;dbname=ssldb',
'username',
'password',
array(
PDO::MYSQL_ATTR_SSL_KEY =>'/path/to/client-key.pem',
PDO::MYSQL_ATTR_SSL_CERT=>'/path/to/client-cert.pem',
PDO::MYSQL_ATTR_SSL_CA =>'/path/to/ca-cert.pem'
)
);
?>
brian at diamondsea dot com ¶
4 years ago
SQLSTATE[HY000]: General error: 2014 Cannot execute queries while other unbuffered queries are active. ...
After spending hours trying to track down why we were getting this error on a new server, after the same code ran fine on other servers, we found the problem to be an old MySQL _client_ library running on our web server, and a latest-version MySQL _server_ running on the database server's box.
Upgraded the MySQL client on the web server to the current revision and the problem went away.
miller_kurt_e at yahoo dot com ¶
4 years ago
SQLSTATE[HY000]: General error: 2014 Cannot execute queries while other unbuffered queries are active. ...
This one can be a royal pain to deal with. Never stack statements to be executed in one go. Nobody ever mentions this possibility in all the posts I've seen dealing with this error.
This example is a Zend Framework example but the theory is the same.
As in:
<?php
$sql = <<<____SQL
CREATE TABLE IF NOT EXISTS `ticket_hist` (
`tid` int(11) NOT NULL,
`trqform` varchar(40) NOT NULL,
`trsform` varchar(40) NOT NULL,
`tgen` datetime NOT NULL,
`tterm` datetime,
`tstatus` tinyint(1) NOT NULL
) ENGINE=ARCHIVE COMMENT='ticket archive';
CREATE TABLE IF NOT EXISTS `request_hist` (
`rqid` int(11) NOT NULL,
`rqtid` int(11) NOT NULL,
`rqsid` int(11) NOT NULL,
`rqdate` datetime NOT NULL,
`rqcode` tinyint(1) NOT NULL,
`rssid` int(11) NOT NULL,
`rsdate` datetime,
`rscode` tinyint(1)
) ENGINE=ARCHIVE COMMENT='request archive';
CREATE TABLE IF NOT EXISTS `relay_hist` (
`rqid` int(5) NOT NULL,
`sdesc` varchar(40) NOT NULL,
`rqemail` varchar(40) NOT NULL,
`sid` int(11) NOT NULL,
`rlsid` int(11) NOT NULL,
`dcode` varchar(5) NOT NULL
) ENGINE=ARCHIVE COMMENT='relay archive';
____SQL;
$result = $this->db->getConnection()->exec($sql);
?>
This will run fine but PDO will balk with the 'unbuffered' error if you follow this with another query.
Instead do:
<?php
$sql = <<<____SQL
CREATE TABLE IF NOT EXISTS `ticket_hist` (
`tid` int(11) NOT NULL,
`trqform` varchar(40) NOT NULL,
`trsform` varchar(40) NOT NULL,
`tgen` datetime NOT NULL,
`tterm` datetime,
`tstatus` tinyint(1) NOT NULL
) ENGINE=ARCHIVE COMMENT='ticket archive';
____SQL;
$result = $this->db->getConnection()->exec($sql);
$sql = <<<____SQL
CREATE TABLE IF NOT EXISTS `request_hist` (
`rqid` int(11) NOT NULL,
`rqtid` int(11) NOT NULL,
`rqsid` int(11) NOT NULL,
`rqdate` datetime NOT NULL,
`rqcode` tinyint(1) NOT NULL,
`rssid` int(11) NOT NULL,
`rsdate` datetime,
`rscode` tinyint(1)
) ENGINE=ARCHIVE COMMENT='request archive';
____SQL;
$result = $this->db->getConnection()->exec($sql);
$sql = <<<____SQL
CREATE TABLE IF NOT EXISTS `relay_hist` (
`rqid` int(5) NOT NULL,
`sdesc` varchar(40) NOT NULL,
`rqemail` varchar(40) NOT NULL,
`sid` int(11) NOT NULL,
`rlsid` int(11) NOT NULL,
`dcode` varchar(5) NOT NULL
) ENGINE=ARCHIVE COMMENT='relay archive';
____SQL;
$result = $this->db->getConnection()->exec($sql);
?>
Chopping it into individual queries fixes the problem.
rmottey at gmail dot com ¶
5 years ago
I have been getting the error below when performing multiple queries within a single page.
Setting the attribute below did not seem to work for me.
So building on previous example i am initilizing my stmt variable on every query and a fetch all into an array. Seems to be working for me.
Error:
PDO Error 1.1: Array ( [0] => xxx[1] => yyy[2] => Lost connection to MySQL server during query )
Fix:
(PDO::setAttribute("PDO::MYSQL_ATTR_USE_BUFFERED_QUERY", true);)
<?
try {
$dbh = new PDO('mysql:host=xxx;port=xxx;dbname=xxx', 'xxx', 'xxx', array( PDO::ATTR_PERSISTENT => false));
$stmt = $dbh->prepare("CALL getname()");
// call the stored procedure
$stmt->execute();
// fetch all rows into an array.
$rows = $stmt->fetchAll();
foreach ($rows as $rs)
{
$id = $rs['id'];
}
//initilise the statement
unset($stmt);
$stmt = $dbh->prepare("call secondprocedure(?);");
$stmt->bindValue(1, $id);
if ( ! $stmt->execute() )
{
echo "PDO Error 1.1:\n";
print_r($stmt->errorInfo());
exit;
}
unset($stmt);
} catch (PDOException $e) {
print "Error!: " . $e->getMessage() . "<br/>";
die();
}
?>
marty at excudo dot net ¶
5 years ago
Davey wrote:
> To use "PDO::MYSQL_ATTR_USE_BUFFERED_QUERY" you should call
> PDO::setAttribute("PDO::MYSQL_ATTR_USE_BUFFERED_QUERY", true);
>
>It will not work when passed into PDO::prepare()
>
> - Davey
Almost correct. It should be:
PDO::setAttribute(PDO::MYSQL_ATTR_USE_BUFFERED_QUERY, true);
so, without the quotes.
otherwise it still won't work :)
practicegoodtheory at gmail dot com ¶
4 years ago
On Windows, with Apache, it would not load php_pdo_mysql.dll until I put libmysql.dll in Apache's dll path (e.g. apache/bin)
bratwizard at yahoo dot com ¶
5 years ago
> konrads dot smelkovs at gmail dot com
> 18-Jul-2007 03:39
> A note for the eager:
>> There is no way how to get returned row count from an executed prepared statement without fetching the rows.
Sure there is, just do something like this:
if ($sth = $pdo->prepare($sql)) {
$sth->execute($values);
$sth->fetch();
// get count of rows in result set
if ($sth_rc = $this->getDataset()->query('SELECT FOUND_ROWS()')) {
$row_count = $sth_rc->fetchColumn(0);
}
}