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Schema::existsInDatabase

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Schema::existsInDatabaseCheck if exists in database

Description

public mysql_xdevapi\Schema::existsInDatabase(): bool

Checks if the current object (schema, table, collection, or view) exists in the schema object.

Liste de paramètres

Cette fonction ne contient aucun paramètre.

Valeurs de retour

true if the schema, table, collection, or view still exists in the schema, else false.

Exemples

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

<?php
$session
= mysql_xdevapi\getSession("mysqlx://user:password@localhost");

$session->sql("DROP DATABASE IF EXISTS food")->execute();
$session->sql("CREATE DATABASE food")->execute();
$session->sql("CREATE TABLE food.fruit(name text, rating text)")->execute();

$schema = $session->getSchema("food");
$schema->createCollection("trees");

// ...

$trees = $schema->getCollection("trees");

// ...

// Is this collection still in the database (schema)?
if ($trees->existsInDatabase()) {
echo
"Yes, the 'trees' collection is still present.";
}

Résultat de l'exemple ci-dessus est similaire à :

Yes, the 'trees' collection is still present.
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