Delete an instance using OID

# cubrid_drop

(PECL CUBRID >= 8.3.0)

cubrid_drop — Delete an instance using OID

### 説明

function cubrid_drop(resource `$conn_identifier`, string `$oid`): bool

The cubrid_drop() function is used to delete an instance from database by using the `oid` of the instance.

### パラメータ

`conn_identifier`
  Connection identifier.
`oid`
  Oid of the instance that you want to delete.

### 戻り値

成功した場合に `true` を、失敗した場合に `false` を返します。

### 例

例1 cubrid_drop() example

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

    @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);

    printf("--- Before Drop: ---\n");
    $attr = cubrid_get($conn, $oid);
    var_dump($attr);

    if (cubrid_drop($conn, $oid)) {
        cubrid_commit($conn);
    } else {
        cubrid_rollback($conn);
    }

    cubrid_close_request($req);

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

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

    printf("\n--- After Drop: ---\n");
    $attr = cubrid_get($conn, $oid);
    var_dump($attr);

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

上の例の出力は以下となります。

    --- Before Drop: ---
    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         "
    }

    --- After Drop: ---
    array(4) {
      ["a"]=>
      string(1) "2"
      ["b"]=>
      array(3) {
        [0]=>
        string(1) "4"
        [1]=>
        string(1) "5"
        [2]=>
        string(1) "7"
      }
      ["c"]=>
      array(4) {
        [0]=>
        string(2) "44"
        [1]=>
        string(2) "55"
        [2]=>
        string(2) "66"
        [3]=>
        string(3) "666"
      }
      ["d"]=>
      string(10) "b         "
    }

### 参考

- cubrid_is_instance() - Check whether the instance pointed by OID exists

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