mssql_fetch_assoc
I was having issues doing two different select queries with batch sizes in the same connection. The first one would run fine, the second one would always return one batch + 1 record (ie. batch size on the 2nd query was 250000 records, it would stop after 250001 and say it was complete even though there should have been 3m+ records).
I was able to overcome this by disconnecting from the DB (via mssql_close($conn);) and reconnecting before I ran the second query. Now my second query returns all the records I need.
Though I would write this here as there is little to no documentation on this issue, and it may only be affecting me. I am connecting from Linux (RHEL5) to SQL Server 2005 on the network, using FreeTDS. If you have this same issue, try the above and it may work for you.
mssql_fetch_batch
(PHP 4 >= 4.0.4, PHP 5, PECL odbtp >= 1.1.1)
mssql_fetch_batch — Devuelve el siguiente lote de registros
Descripción
int mssql_fetch_batch
( resource
$result
)Devuelve el siguiente lote de registros.
Parámetros
-
result -
Los resultados que se están evaluando. Este resultado proviene de una llamada a la función mssql_query().
Valores devueltos
Devuelve el número de filas del lote devuelto.
Ejemplos
Ejemplo #1 Ejemplo con mssql_fetch_batch()
<?php
// Conectar a MSSQL y seleccionar la base de datos
$link = mssql_connect('MANGO\SQLEXPRESS', 'sa', 'phpfi');
mssql_select_db('php', $link);
// Enviar una consulta
$result = mssql_query('SELECT * FROM [php].[dbo].[people]', $link, 100);
$records = 10;
while ($records >= 0) {
while ($row = mssql_fetch_assoc($result)) {
// Tratar las filas leídas...
}
--$records;
}
if ($batchsize = mssql_fetch_batch($result)) {
// $batchsize es el número de registros que quedan
// del resultado, pero que todavía no se han mostrado
}
?>
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User Contributed Notes
mssql_fetch_batch - [3 notes]
jeffreznik ¶
3 months ago
doug dot pe at gmail dot com ¶
10 months ago
This demonstrates the return value:
<?php
$connect = mssql_connect("databasename", "username", "password");
$sql = "SELECT * FROM huge_table"; // returns 3271 rows, for example
$qry = mssql_query($SQL, $connect, 1000); // 1000 Rows batchsize
$batchsize = mssql_num_rows($qry);
print "$batchsize <br />\r\n";
do {
$batchsize = mssql_fetch_batch($qry);
print "$batchsize <br />\r\n";
} while ($batchsize); // get the next batch until end
?>
returns:
1000
1000
1000
271
0
brutalex430 ¶
2 years ago
This could be usefull if you have a large dataset:
<?php
$qry = mssql_query("SELECT * FROM huge_table", $conn, 1000); // 1000 Rows batchsize
do {
while ($row = mssql_fetch_row($qry)) {
// do something like
print_r($row);
}
} while (mssql_fetch_batch($navqry)); // get the next batch until end
?>