getTableCollation example

// Check for the 'utf8_bin' collation.       if (isset($row['Collation']) && $row['Collation'] == 'utf8_bin') {
        $definition['fields'][$name]['binary'] = TRUE;
      }
    }

    // Set primary key, unique keys, and indexes.     $this->getTableIndexes($connection, $table, $definition);

    // Set table collation.     $this->getTableCollation($connection, $table, $definition);

    return $definition;
  }

  /** * Adds primary key, unique keys, and index information to the schema. * * @param \Drupal\Core\Database\Connection $connection * The database connection to use. * @param string $table * The table to find indexes for. * @param array &$definition * The schema definition to modify. */