Collection::existsInDatabase

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Collection::existsInDatabaseCheck if collection exists in database

Description

public mysql_xdevapi\Collection::existsInDatabase ( void ) : bool

Checks if the Collection object refers to a collection in the database (schema).

Liste de paramètres

Cette fonction ne contient aucun paramètre.

Valeurs de retour

Returns TRUE if collection exists in the database, else FALSE if it does not.

Exemples

Exemple #1 mysql_xdevapi\Collection::existsInDatabase() example

<?php
$session 
mysql_xdevapi\getSession("mysqlx://user:password@localhost");
$session->sql("DROP DATABASE IF EXISTS addressbook")->execute();
$session->sql("CREATE DATABASE addressbook")->execute();

$schema $session->getSchema("addressbook");
$create $schema->createCollection("people");

// ...

$collection $schema->getCollection("people");

// ...

if (!$collection->existsInDatabase()) {
    echo 
"The collection no longer exists in the database named addressbook. What happened?";
}
?>