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PDO::pgsqlLOBCreate (no version information, might be only in CVS) PDO::pgsqlLOBCreate -- Creates a new large object Descriptionstring PDO::pgsqlLOBCreate ( void )
PDO::pgsqlLOBCreate() creates a large object and
returns the OID of that object. You may then open a stream on the object
using PDO::pgsqlLOBOpen() to read or write data to
it. The OID can be stored in columns of type OID and be used to reference
the large object, without causing the row to grow arbitrarily large.
The large object will continue to live in the database until it
is removed by calling PDO::pgsqlLOBUnlink().
Large objects can be up to 2GB in size, but are cumbersome to use; you need
to ensure that PDO::pgsqlLOBUnlink() is called prior
to deleting the last row that references its OID from your database.
In addition, large objects have no access controls. As an alternative,
try the bytea column type; recent versions of PostgreSQL allow bytea
columns of up to 1GB in size and transparently manage the storage for
optimal row size.
Note:
This function must be called within a transaction.
Parameters
PDO::pgsqlLOBCreate() takes no parameters.
Return Values
Returns the OID of the newly created large object on success, or FALSE
on failure.
Examples
Example 1. A PDO::pgsqlLOBCreate() example
This example creates a new large object and copies the contents
of a file into it. The OID is then stored into a table.
<?php
$db = new PDO('pgsql:dbname=test host=localhost', $user, $pass);
$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$db->beginTransaction();
$oid = $db->pgsqlLOBCreate();
$stream = $db->pgsqlLOBOpen($oid, 'w');
$local = fopen($filename, 'rb');
stream_copy_to_stream($local, $stream);
$local = null;
$stream = null;
$stmt = $db->prepare("INSERT INTO BLOBS (ident, oid) VALUES (?, ?)");
$stmt->execute(array($some_id, $oid));
$db->commit();
?> |
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PDO_PGSQL DSN
