Table::existsInDatabase

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Table::existsInDatabaseCheck if table exists in database

说明

public mysql_xdevapi\Table::existsInDatabase ( ) : bool

Verifies if this table exists in the database.

参数

此函数没有参数。

返回值

Returns true if table exists in the database, else false if it does not.

范例

Example #1 mysql_xdevapi\Table::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();
$session->sql("CREATE TABLE addressbook.names(name text, age int)")->execute();
$session->sql("INSERT INTO addressbook.names values ('John', 42), ('Sam', 33)")->execute();

$schema $session->getSchema("addressbook");
$table  $schema->getTable("names");

if (
$table->existsInDatabase()) {
  echo 
"Yes, this table still exists in the session's schema.";
}
?>

以上例程的输出类似于:

Yes, this table still exists in the session's schema.

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