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Schema::existsInDatabase

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Schema::existsInDatabaseCheck if exists in database

Descrizione

public mysql_xdevapi\Schema::existsInDatabase(): bool

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

Elenco dei parametri

Questa funzione non contiene parametri.

Valori restituiti

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

Esempi

Example #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.";
}

Il precedente esempio visualizzerà qualcosa simile a:

Yes, the 'trees' collection is still present.
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