Schema::existsInDatabase
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Schema::existsInDatabase — Check if exists in database
Descrizione
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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