mysqli::more_results
You can use prepared statements on stored procedures.
You just need to flush all the subsequent result sets before closing the statement... so:
$mysqli_stmt = $mysqli->prepare(....);
... bind, execute, bind, fetch ...
while($mysqli->more_results())
{
$mysqli->next_result();
$discard = $mysqli->store_result();
}
$mysqli_stmt->close();
Hope that helps :o)
mysqli::multi_query
mysqli_multi_query
(PHP 5)
mysqli::multi_query -- mysqli_multi_query — Performs a query on the database
Descrição
Modo orientado a objeto (método):
bool mysqli::multi_query
( string $query
)
Modo procedural:
Executa um ou múltiplas queries que são concatenadas com ponto-e-vírgula.
Para recuperar o conjunto de resultado da primeira query, você pode usar mysqli_use_result() ou mysqli_store_result(). Todos os resultados de queries subseqüentes podem ser processados usando mysqli_more_results() e mysqli_next_result().
Parâmetros
- link
-
Apenas para estilo de procedimento: Um identificador de conexão retornado por mysqli_connect() or mysqli_init()
- query
-
A query, como uma string.
Valor Retornado
Retorna FALSE se o primeiro comando falhar. Para recuperar erros subseqüentes de outros comandos, você terá que chamar mysqli_next_result() primeiro.
Exemplos
Exemplo #1 Modo orientado a objeto
<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
$query = "SELECT CURRENT_USER();";
$query .= "SELECT Name FROM City ORDER BY ID LIMIT 20, 5";
/* execute multi query */
if ($mysqli->multi_query($query)) {
do {
/* store first result set */
if ($result = $mysqli->store_result()) {
while ($row = $result->fetch_row()) {
printf("%s\n", $row[0]);
}
$result->free();
}
/* print divider */
if ($mysqli->more_results()) {
printf("-----------------\n");
}
} while ($mysqli->next_result());
}
/* close connection */
$mysqli->close();
?>
Exemplo #2 Modo procedural
<?php
$link = mysqli_connect("localhost", "my_user", "my_password", "world");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
$query = "SELECT CURRENT_USER();";
$query .= "SELECT Name FROM City ORDER BY ID LIMIT 20, 5";
/* execute multi query */
if (mysqli_multi_query($link, $query)) {
do {
/* store first result set */
if ($result = mysqli_store_result($link)) {
while ($row = mysqli_fetch_row($result)) {
printf("%s\n", $row[0]);
}
mysqli_free_result($result);
}
/* print divider */
if (mysqli_more_results($link)) {
printf("-----------------\n");
}
} while (mysqli_next_result($link));
}
/* close connection */
mysqli_close($link);
?>
O exemplo acima irá imprimir algo similar a:
my_user@localhost ----------------- Amersfoort Maastricht Dordrecht Leiden Haarlemmermeer
Veja Também
- mysqli_use_result() - Initiate a result set retrieval
- mysqli_store_result() - Transfers a result set from the last query
- mysqli_next_result() - Prepara o próximo resultado de multi_query
- mysqli_more_results() - Verifica se há mais algum resultado de uma multi query
add a note
User Contributed Notesmysqli::multi_query
Miles
22-Jun-2009 03:47
22-Jun-2009 03:47
raye1010 at yahoo dot com dot hk
29-Jan-2009 04:56
29-Jan-2009 04:56
This is my point of view:
Actually when calling $mysqli->next_result(), MySQL server will try to prepare resources for storing resultset. If you want to multi query for stored procedures, it's better to use $mysqli->use_result()->close() to close the resources. For functions, it's better to use $mysqli->store_result()->free() since there's resultset returned. Otherwise, an error of "Commands out of sync" will be rasied.
Here's the code I test:
<?php
$mysql = new mysql('localhost', 'user', 'pw', 'db');
$query = 'show tables;';
$query.= 'show tables;';
$query.= 'select * from dummy_table;';
$query.= 'show tables;'; // this statement will be ignored as the dummy_table doesn't exist and the loop should quit
$mysqli->multi_query($query);
do {
$mysqli->use_result()->close();
echo "Okay\n";
} while ($mysqli->next_result());
if ($mysqli->errno) {
echo "Stopped while retrieving result : ".$mysqli->error;
}
?>
Returns :
Okay
Okay
Stopped while retrieving result : Table 'db.dummy_table' doesn't exist
jparedes at gmail dot com
27-Aug-2008 02:05
27-Aug-2008 02:05
It's very important that after executing mysqli_multi_query you have first process the resultsets before sending any another statement to the server, otherwise your
socket is still blocked.
Please note that even if your multi statement doesn't contain SELECT queries, the server will send result packages containing errorcodes (or OK packet) for single statements.
undefined(AT)users(DOT)berlios(DOT)de
04-Mar-2008 10:13
04-Mar-2008 10:13
mysqli_multi_query handles MySQL Transaction on InnoDB's :-)
<?php
$mysqli = mysqli_connect( "localhost", "owner", "pass", "db", 3306, "/var/lib/mysql/mysql.sock" );
$QUERY = <<<EOT
START TRANSACTION;
SELECT @lng:=IF( STRCMP(`main_lang`,'de'), 'en', 'de' )
FROM `main_data` WHERE ( `main_activ` LIKE 1 ) ORDER BY `main_id` ASC;
SELECT `main_id`, `main_type`, `main_title`, `main_body`, `main_modified`, `main_posted`
FROM `main_data`
WHERE ( `main_type` RLIKE "news|about" AND `main_lang` LIKE @lng AND `main_activ` LIKE 1 )
ORDER BY `main_type` ASC;
COMMIT;
EOT;
$query = mysqli_multi_query( $mysqli, $QUERY ) or die( mysqli_error( $mysqli ) );
if( $query )
{
do {
if( $result = mysqli_store_result( $mysqli ) )
{
$subresult = mysqli_fetch_assoc( $result );
if( ! isset( $subresult['main_id'] ) )
continue;
foreach( $subresult AS $k => $v )
{
var_dump( $k , $v );
}
}
} while ( mysqli_next_result( $mysqli ) );
}
mysqli_close( $mysqli );
?>
mjmendoza at grupzero dot tk
30-Nov-2006 04:47
30-Nov-2006 04:47
I was developing my own CMS and I was having problem with attaching the database' sql file. I thought mysqli_multi_query got bugs where it crashes my MySQL server. I tried to report the bug but it showed that it has duplicate bug reports of other developers. To my surprise, mysqli_multi_query needs to bother with result even if there's none.
I finally got it working when I copied the sample and removed somethings. Here is what it looked liked
<?php
$link = mysqli_connect("localhost", "my_user", "my_password", "world");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
$query = "CREATE TABLE....;...;... blah blah blah;...";
/* execute multi query */
if (mysqli_multi_query($link, $query)) {
do {
/* store first result set */
if ($result = mysqli_store_result($link)) {
//do nothing since there's nothing to handle
mysqli_free_result($result);
}
/* print divider */
if (mysqli_more_results($link)) {
//I just kept this since it seems useful
//try removing and see for yourself
}
} while (mysqli_next_result($link));
}
/* close connection */
mysqli_close($link);
?>
bottom-line: I think mysql_multi_query should only be used for attaching a database. it's hard to handle results from 'SELECT' statements inside a single while loop.
sly underscore mcfly at hotmail dot com
07-Sep-2006 10:32
07-Sep-2006 10:32
Ive just had exactly the same problem as below trying to execute multiple stored procedures. I thought i might as well add how to do it the object oriented way.
Instead of putting the one statement:
<?php
$mysqli->next_result();
?>
Put two:
<?php
$mysqli->next_result();
$mysqli->next_result();
?>
The first statement points (possibly using the term incorrectly) you to the return value. The second one will point you to the result of the next query.
I hope this makes sense.
info at ff dot net
08-May-2006 09:02
08-May-2006 09:02
Note that you need to use this function to call Stored Procedures!
If you experience "lost connection to MySQL server" errors with your Stored Procedure calls then you did not fetch the 'OK' (or 'ERR') message, which is a second result-set from a Stored Procedure call. You have to fetch that result to have no problems with subsequent queries.
Bad example, will FAIL now and then on subsequent calls:
<?php
$sQuery='CALL exampleSP('param')';
if(!mysqli_multi_query($this->sqlLink,$sQuery))
$this->queryError();
$this->sqlResult=mysqli_store_result($this->sqlLink);
?>
Working example:
<?php
$sQuery='CALL exampleSP('param')';
if(!mysqli_multi_query($this->sqlLink,$sQuery))
$this->queryError();
$this->sqlResult=mysqli_store_result($this->sqlLink);
if(mysqli_more_results($this->sqlLink))
while(mysqli_next_result($this->sqlLink));
?>
Of course you can do more with the multiple results then just throwing them away, but for most this will suffice. You could for example make an "sp" function which will kill the 2nd 'ok' result.
This nasty 'OK'-message made me spend hours trying to figure out why MySQL server was logging warnings with 'bad packets from client' and PHP mysql_error() with 'Connection lost'. It's a shame the mysqli library does catch this by just doing it for you.