Change record status: 
Project: 
Introduced in branch: 
10.1.x
Introduced in version: 
10.1.0
Description: 

Support for per-table prefixing has as been deprecated since Drupal 8.2. The method Drupal\Core\Database\Connection::prefixTable($table) which returned the prefix for a single table has been deprecated. In Drupal 10, there is only a single prefix for all tables, making the method's name and parameter misleading. Therefore, a new method Drupal\Core\Database\Connection::getPrefix() was added.

Before

$prefix = Drupal\Core\Database\Connection->tablePrefix($table);

After

$prefix = Drupal\Core\Database\Connection->getPrefix();

Impacts: 
Module developers