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.
Lob identifier as a result of cubrid_lob2_new() or get from the result set.
Number of units you want to move the cursor.
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.
TRUE
if the process is successful and FALSE
for failure.
<?php // test_lob (id INT, contents CLOB) $conn = cubrid_connect("localhost", 33000, "demodb", "dba", ""); cubrid_execute($conn,"DROP TABLE if exists test_lob"); cubrid_execute($conn,"CREATE TABLE test_lob (id INT, contents CLOB)"); $req = cubrid_prepare($conn, "INSERT INTO test_lob VALUES(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, "beautiful"); cubrid_lob2_seek($lob, 15, CUBRID_CURSOR_FIRST); $data = cubrid_lob2_read($lob, 5); echo $data."\n"; cubrid_lob2_bind($req, 1, $lob); cubrid_execute($req); cubrid_disconnect($conn); ?>
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