文字

cubrid_lock_read

(PECL CUBRID >= 8.3.0)

cubrid_lock_readSet a read lock on the given OID

说明

bool cubrid_lock_read ( resource $conn_identifier , string $oid )

The cubrid_lock_read() function is used to put read lock on the instance pointed by given oid.

参数

conn_identifier

Connection identifier.

oid

OID of the instance that you want to put read lock on.

返回值

TRUE , when process is successful.

FALSE , when process is unsuccessful.

范例

Example #1 cubrid_lock_read() example

<?php
$conn 
cubrid_connect ( "localhost" 33000 "demodb" "dba" );

@
cubrid_execute ( $conn "DROP TABLE foo" );
cubrid_execute ( $conn "CREATE TABLE foo(a int AUTO_INCREMENT, b set(int), c list(int), d char(10))" );
cubrid_execute ( $conn "INSERT INTO foo(a, b, c, d) VALUES(1, {1,2,3}, {11,22,33,333}, 'a')" );
cubrid_execute ( $conn "INSERT INTO foo(a, b, c, d) VALUES(2, {4,5,7}, {44,55,66,666}, 'b')" );

$req  cubrid_execute ( $conn "SELECT * FROM foo" CUBRID_INCLUDE_OID );

cubrid_move_cursor ( $req 1 CUBRID_CURSOR_FIRST );
$oid  cubrid_current_oid ( $req );

cubrid_lock_read ( $conn $oid );

$attr  cubrid_get ( $conn $oid "b" );
var_dump ( $attr );

$attr  cubrid_get ( $conn $oid );
var_dump ( $attr );

cubrid_close_request ( $req );
cubrid_disconnect ( $conn );
?>

以上例程会输出:

string(9) "{1, 2, 3}"
array(4) {
  ["a"]=>
  string(1) "1"
  ["b"]=>
  array(3) {
    [0]=>
    string(1) "1"
    [1]=>
    string(1) "2"
    [2]=>
    string(1) "3"
  }
  ["c"]=>
  array(4) {
    [0]=>
    string(2) "11"
    [1]=>
    string(2) "22"
    [2]=>
    string(2) "33"
    [3]=>
    string(3) "333"
  }
  ["d"]=>
  string(10) "a         "
}

参见

  • cubrid_lock_write() - Set a write lock on the given OID
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