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 — Retorna o próximo lote de registros
Descrição
int mssql_fetch_batch
( resource
$result
)Retorna o próximo lote de registros
Parâmetros
-
result -
O resource do resultado que foi avaliado. Este resultado é o que foi retornado ao chamar a mssql_query().
Valor Retornado
Retorna o número do lote como inteiro.
Exemplos
Exemplo #1 Exemplo mssql_fetch_batch()
<?php
$resDb = mssql_connect('localhost', 'user', 'name');
$result = mssql_query('SELECT * FROM MYTABLE', $resDb, 10000);
$intNumRows = mssql_num_rows($result);
while ($intNumRows > 0) {
while ($arrRow = mssql_fetch_assoc($result)) {
// Do stuff ...
}
$intNumRows = mssql_fetch_batch($result);
}
?>
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User Contributed Notes
mssql_fetch_batch - [3 notes]
jeffreznik ¶
2 months ago
doug dot pe at gmail dot com ¶
9 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
?>