# cubrid_col_size

(PECL CUBRID >= 8.3.0)

cubrid_col_size — Get the number of elements in collection type column using OID

### 说明

cubrid_col_size ( resource `$conn_identifier` , string `$oid` , string `$attr_name` ) : int

The cubrid_col_size() function is used to get the number of elements in a collection type (set, multiset, sequence) attribute.

### 参数

`conn_identifier`

  Connection identifier.

`oid`

  OID the instance that you want to work with.

`attr_name`

  Name of the attribute that you want to work with.

### 返回值

Number of elements, when process is successful.

`FALSE`, when process is unsuccessful.

### 更新日志

版本 | 说明
--- | ---
8.3.1 | Change return value: when process is unsuccessful, return false, not -1.

### 范例

Example #1 cubrid_col_size() 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')");

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

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

    $attr = cubrid_col_get($conn, $oid, "b");
    var_dump($attr);

    $size = cubrid_col_size($conn, $oid, "b");
    var_dump($size);

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

以上例程会输出：

    array(3) {
      [0]=>
      string(1) "1"
      [1]=>
      string(1) "2"
      [2]=>
      string(1) "3"
    }
    int(3)