cubrid_is_instance

Check whether the instance pointed by OID exists

説明

int cubrid_is_instance(resource $conn_identifier, string $oid)

The cubrid_is_instance function is used to check whether the instance pointed by the given oid exists or not.

パラメータ

conn_identifier: Connection identifier.
oid: OID of the instance that you want to check the existence.

戻り値

1, if such instance exists;

0, if such instance does not exist;

-1, in case of error

例

例1 cubrid_is_instance example

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

$sql = <<<EOD
SELECT host_year, medal, game_date 
FROM game 
WHERE athlete_code IN 
    (SELECT code FROM athlete WHERE name='Thorpe Ian');
EOD;

$req = cubrid_execute($conn, $sql, CUBRID_INCLUDE_OID);
$oid = cubrid_current_oid($req);

$res = cubrid_is_instance ($conn, $oid);
if ($res == 1) {
    echo "Instance pointed by $oid exists.\n";
} else if ($res == 0){
    echo "Instance pointed by $oid doesn't exist.\n";
} else {
    echo "error\n";
}

cubrid_disconnect($conn);
?>

上の例の出力は以下となります。

Instance pointed by @0|0|0 doesn't exist.

参考

cubrid_drop
cubrid_get_class_name