php 操作 oracle lob 数据2-无忧网

CREATE SEQUENCE mylobs_id_seq
    NOMINVALUE
    NOMAXVALUE
    NOCYCLE
    CACHE 20
    NOORDER
INCREMENT BY 1;
CREATE TABLE mylobs (
    id NUMBER PRIMARY KEY,
    mylob CLOB
)

插入

<?php
header("content-type:text/html;charset=utf-8");
error_reporting(E_ALL);
set_time_limit(0);
echo "<pre>";
$conn=oci_connect(‘demo‘,‘demo‘,‘localhost/xe‘,‘utf8‘);
$sql = "INSERT INTO
        mylobs
          (
            id,
            mylob
          )
       VALUES
          (
            mylobs_id_seq.NEXTVAL,
            EMPTY_CLOB()
          )
       RETURNING
          mylob INTO :mylob_loc";
$stmt = oci_parse($conn, $sql);
$myLOB = oci_new_descriptor($conn, OCI_D_LOB);
oci_bind_by_name($stmt, ":mylob_loc", $myLOB, -1, OCI_B_CLOB);
oci_execute($stmt, OCI_DEFAULT) or die ("Unable to execute queryn");
$content=str_repeat(‘你‘,80000);
if ( !$myLOB->save($content) ) {
    oci_rollback($conn);
} else {
    oci_commit($conn);
}
oci_free_statement($stmt);
$myLOB->free();
oci_close($conn);

查询

<?php
header("content-type:text/html;charset=utf-8");
error_reporting(E_ALL);
set_time_limit(0);
echo "<pre>";
$conn=oci_connect(‘demo‘,‘demo‘,‘localhost/xe‘,‘utf8‘);

$sql = "SELECT * FROM mylobs ORDER BY id";
$stmt = oci_parse($conn, $sql);
oci_execute($stmt) or die ("Unable to execute queryn");
while ( $row = oci_fetch_assoc($stmt) ) {
echo "ID: {$row[‘ID‘]}, ";
echo $row[‘MYLOB‘]->load()."n";
}
oci_free_statement($stmt);
oci_close($conn);

修改

<?php
header("content-type:text/html;charset=utf-8");
error_reporting(E_ALL);
set_time_limit(0);
echo "<pre>";
$conn=oci_connect(‘demo‘,‘demo‘,‘localhost/xe‘,‘utf8‘);

$sql = "SELECT mylob FROM mylobs WHERE id = 1 FOR UPDATE";
$stmt = oci_parse($conn, $sql);
oci_execute($stmt, OCI_DEFAULT) or die ("Unable to execute queryn");
if ( FALSE === ($row = oci_fetch_assoc($stmt) ) ) {
    oci_rollback($conn);
    die ("Unable to fetch rown");
}
if ( !$row[‘MYLOB‘]->truncate() ) {
    oci_rollback($conn);
    die ("Failed to truncate LOBn");
}
if ( !$row[‘MYLOB‘]->save(‘UPDATE: ‘.date(‘H:i:s‘,time()) ) ) {
    oci_rollback($conn);
} else {
    oci_commit($conn);
}
oci_free_statement($stmt);
$row[‘MYLOB‘]->free();

oci_close($conn);

原文：http://www.cnblogs.com/songzhenghe/p/4582318.html

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php 操作 oracle lob 数据2

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