PHP8 cubrid_lock_read

2024-03-28 09:32 更新

(PECL CUBRID >= 8.3.0)

cubrid_lock_read — 在給定的OID上設(shè)置讀鎖

說明

cubrid_lock_read(resource $conn_identifier, string $oid): bool

cubrid_lock_read（） 函數(shù)用于將 read 鎖定給定 所指向的實(shí)例。oid

參數(shù) 

conn_identifier

連接標(biāo)識(shí)符。

oid

要設(shè)置讀鎖的實(shí)例的 OID。

返回值 

成功時(shí)返回 true， 或者在失敗時(shí)返回 false。

示例 

示例 #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);
?>

以上示例會(huì)輸出：

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         "
}

參見 

  • cubrid_lock_write（） - 在給定的 OID 上設(shè)置寫鎖


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