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db2_lob_read

(PECL ibm_db2 >= 1.6.0)

db2_lob_read Gets a user defined size of LOB files with each invocation

Beschreibung

string db2_lob_read ( resource $stmt , int $colnum , int $length )

Use db2_lob_read() to iterate through a specified column of a result set and retrieve a user defined size of LOB data.

Parameter-Liste

stmt

A valid stmt resource containing LOB data.

colnum

A valid column number in the result set of the stmt resource.

length

The size of the LOB data to be retrieved from the stmt resource.

R├╝ckgabewerte

Returns the amount of data the user specifies. Returns FALSE if the data cannot be retrieved.

Beispiele

Beispiel #1 Iterating through different types of data

<?php

/* Database Connection Parameters */
$db 'SAMPLE';
$username 'db2inst1';
$password 'ibmdb2';

/* Obtain Connection Resource */
$conn db2_connect($db,$username,$password);

if (
$conn) {
    
$drop 'DROP TABLE clob_stream';
    
$result = @db2_exec$conn$drop );

    
$create 'CREATE TABLE clob_stream (id INTEGER, my_clob CLOB)';
    
$result db2_exec$conn$create );

    
$variable "";
    
$stmt db2_prepare($conn"INSERT INTO clob_stream (id,my_clob) VALUES (1, ?)");
    
$variable "THIS IS A CLOB TEST. THIS IS A CLOB TEST.";
    
db2_bind_param($stmt1"variable"DB2_PARAM_IN);
    
db2_execute($stmt);

    
$sql "SELECT id,my_clob FROM clob_stream";
    
$result db2_prepare($conn$sql);
    
db2_execute($result);
    
db2_fetch_row($result);
    
$i 0;
    
/* Read LOB data */
    
while ($data db2_lob_read($result26)) {
        echo 
"Loop $i$data\n";
        
$i $i 1;
    }

    
$drop 'DROP TABLE blob_stream';
    
$result = @db2_exec$conn$drop );

    
$create 'CREATE TABLE blob_stream (id INTEGER, my_blob CLOB)';
    
$result db2_exec$conn$create );

    
$variable "";
    
$stmt db2_prepare($conn"INSERT INTO blob_stream (id,my_blob) VALUES (1, ?)");
    
$variable "THIS IS A BLOB TEST. THIS IS A BLOB TEST.";
    
db2_bind_param($stmt1"variable"DB2_PARAM_IN);
    
db2_execute($stmt);

    
$sql "SELECT id,my_blob FROM blob_stream";
    
$result db2_prepare($conn$sql);
    
db2_execute($result);
    
db2_fetch_row($result);
    
$i 0;
    
/* Read LOB data */
    
while ($data db2_lob_read($result26)) {
        echo 
"Loop $i$data\n";
        
$i $i 1;
    }
} else {
    echo 
'no connection: ' db2_conn_errormsg();
}

?>

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

Loop 0: THIS I
Loop 1: S A CL
Loop 2: OB TES
Loop 3: T. THI
Loop 4: S IS A
Loop 5:  CLOB 
Loop 6: TEST.
Loop 0: THIS I
Loop 1: S A BL
Loop 2: OB TES
Loop 3: T. THI
Loop 4: S IS A
Loop 5:  BLOB 
Loop 6: TEST.

Siehe auch

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