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cubrid_lob2_seek

(PECL CUBRID >= 8.4.1)

cubrid_lob2_seek — Move the cursor of a lob object.


Описание

bool cubrid_lob2_seek ( resource $lob_identifier , int $offset [, int $origin = CUBRID_CURSOR_CURRENT ] )

The cubrid_lob2_seek() function is used to move the cursor position of a lob object by the value set in the offset argument, to the direction set in the origin argument.

To set the origin argument, you can use CUBRID_CURSOR_FIRST to set the cursor position moving forward offset units from the first beginning. In this case, offset must be a positive value.

If you use CUBRID_CURSOR_CURRENT for origin, you can move forward or backward. and offset can be positive or negative.

If you use CUBRID_CURSOR_LAST for origin, you can move backward offset units from the end of LOB object and offset only can be positive.


Список параметров

lob_identifier -

Lob identifier as a result of cubrid_lob2_new() or get from the result set.

offset -

Number of units you want to move the cursor.

origin -

This parameter can be the following values:

CUBRID_CURSOR_FIRST: move forward from the first beginning.

CUBRID_CURSOR_CURRENT: move forward or backward from the current position.

CUBRID_CURSOR_LAST: move backward at the end of LOB object.


Возвращаемые значения

TRUE if the process is successful and FALSE for failure.


Примеры

Пример #1 cubrid_lob2_seek() example

// test_lob (id INT, contents CLOB)
$conn = cubrid_connect("localhost", 33000, "demodb", "public", "");
$req = cubrid_execute($conn, "INSERT INTO test_lob (2, ?)");
$lob = cubrid_lob2_new($conn, 'CLOB');
$len = cubrid_lob2_write($lob, "Hello world");
cubrid_lob2_seek($lob, 0, CUBRID_CURSOR_LAST);
$cubrid_lob2_write($lob, "beautifull");
cubrid_lob2_seek($lob, 15, CUBRID_CURSOR_CURRENT);
$data = cubrid_lob2_read($lob, 5);
cubrid_bind($req, 1, $lob);
cubrid_execute($req);
cubrid_disconnect($conn);

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Описание на ru2.php.net
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