db2_lob_read

(PECL ibm_db2 >= 1.6.0)
Gets a user defined size of LOB files with each invocation
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.

Parameters:
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.

Returns:

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

Examples:
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, ?)");
    $variable = "THIS IS A CLOB TEST. THIS IS A CLOB TEST.";
    db2_bind_param($stmt, 1, "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($result, 2, 6)) {
        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, ?)");
    $variable = "THIS IS A BLOB TEST. THIS IS A BLOB TEST.";
    db2_bind_param($stmt, 1, "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($result, 2, 6)) {
        echo "Loop $i: $data\n";
        $i = $i + 1;
    }
} else {
    echo 'no connection: ' . db2_conn_errormsg();
}

?>

The above example will output:

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.
See also:

db2_bind_param() -

db2_exec() -

db2_execute() -

db2_fetch_row() -

db2_prepare() -

db2_result() -

doc_php
2016-02-24 16:16:46
Comments
Leave a Comment

Please login to continue.