08-03-2007
Quote:
Originally Posted by
jim mcnamara
rowid is not an indexed column - it is a "pseudocolumn'. the in () subselect will read thru the entire select statement's result set each time. When I get back in a while I'll write something that is faster. You may need to add an index.
Does that mean its executing in this fashion.
rowid <1> - evaluate sub query
rowid <2> - evaluate sub query
.
.
.
rowid <n> - evaluate sub query
Last edited by reborg; 08-03-2007 at 03:29 PM..
Reason: touch post to fix quotes
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LEARN ABOUT PHP
oci_new_descriptor
OCI_NEW_DESCRIPTOR(3) OCI_NEW_DESCRIPTOR(3)
oci_new_descriptor - Initializes a new empty LOB or FILE descriptor
SYNOPSIS
OCI-Lob oci_new_descriptor (resource $connection, [int $type = OCI_DTYPE_LOB])
DESCRIPTION
Allocates resources to hold descriptor or LOB locator.
PARAMETERS
o $connection
- An Oracle connection identifier, returned by oci_connect(3) or oci_pconnect(3).
o $type
- Valid values for $type are: OCI_DTYPE_FILE, OCI_DTYPE_LOB and OCI_DTYPE_ROWID.
RETURN VALUES
Returns a new LOB or FILE descriptor on success, FALSE on error.
EXAMPLES
Example #1
oci_new_descriptor(3) example
<?php
/* This script is designed to be called from a HTML form.
* It expects $user, $password, $table, $where, and $commitsize
* to be passed in from the form. The script then deletes
* the selected rows using the ROWID and commits after each
* set of $commitsize rows. (Use with care, there is no rollback)
*/
$conn = oci_connect($user, $password);
$stmt = oci_parse($conn, "select rowid from $table $where");
$rowid = oci_new_descriptor($conn, OCI_D_ROWID);
oci_define_by_name($stmt, "ROWID", $rowid);
oci_execute($stmt);
while (oci_fetch($stmt)) {
$nrows = oci_num_rows($stmt);
$delete = oci_parse($conn, "delete from $table where ROWID = :rid");
oci_bind_by_name($delete, ":rid", $rowid, -1, OCI_B_ROWID);
oci_execute($delete);
echo "$nrows
";
if (($nrows % $commitsize) == 0) {
oci_commit($conn);
}
}
$nrows = oci_num_rows($stmt);
echo "$nrows deleted...
";
oci_free_statement($stmt);
oci_close($conn);
?>
<?php
/* This script demonstrates file upload to LOB columns
* The formfield used for this example looks like this
* <form action="upload.php" method="post" enctype="multipart/form-data">
* <input type="file" name="lob_upload" />
* ...
*/
if (!isset($lob_upload) || $lob_upload == 'none'){
?>
<form action="upload.php" method="post" enctype="multipart/form-data">
Upload file: <input type="file" name="lob_upload" /><br />
<input type="submit" value="Upload" /> - <input type="reset" value="Reset" />
</form>
<?php
} else {
// $lob_upload contains the temporary filename of the uploaded file
// see also the features section on file upload,
// if you would like to use secure uploads
$conn = oci_connect($user, $password);
$lob = oci_new_descriptor($conn, OCI_D_LOB);
$stmt = oci_parse($conn, "insert into $table (id, the_blob)
values(my_seq.NEXTVAL, EMPTY_BLOB()) returning the_blob into :the_blob");
oci_bind_by_name($stmt, ':the_blob', $lob, -1, OCI_B_BLOB);
oci_execute($stmt, OCI_DEFAULT);
if ($lob->savefile($lob_upload)){
oci_commit($conn);
echo "Blob successfully uploaded
";
}else{
echo "Couldn't upload Blob
";
}
$lob->free();
oci_free_statement($stmt);
oci_close($conn);
}
?>
Example #2
oci_new_descriptor(3) example
<?php
/* Calling PL/SQL stored procedures which contain clobs as input
* parameters (PHP 4 >= 4.0.6).
* Example PL/SQL stored procedure signature is:
*
* PROCEDURE save_data
* Argument Name Type In/Out Default?
* ------------------------------ ----------------------- ------ --------
* KEY NUMBER(38) IN
* DATA CLOB IN
*
*/
$conn = oci_connect($user, $password);
$stmt = oci_parse($conn, "begin save_data(:key, :data); end;");
$clob = oci_new_descriptor($conn, OCI_D_LOB);
oci_bind_by_name($stmt, ':key', $key);
oci_bind_by_name($stmt, ':data', $clob, -1, OCI_B_CLOB);
$clob->write($data);
oci_execute($stmt, OCI_DEFAULT);
oci_commit($conn);
$clob->free();
oci_free_statement($stmt);
?>
NOTES
Note
In PHP versions before 5.0.0 you must use ocinewdescriptor(3) instead. This name still can be used, it was left as alias of
oci_new_descriptor(3) for downwards compatability. This, however, is deprecated and not recommended.
SEE ALSO
oci_bind_by_name(3).
PHP Documentation Group OCI_NEW_DESCRIPTOR(3)