Schema::renameTable

public Schema::renameTable($table, $new_name)

public function renameTable($table, $new_name) {
  if (!$this->tableExists($table)) {
    throw new SchemaObjectDoesNotExistException(t("Cannot rename @table to @table_new: table @table doesn't exist.", array('@table' => $table, '@table_new' => $new_name)));
  }
  if ($this->tableExists($new_name)) {
    throw new SchemaObjectExistsException(t("Cannot rename @table to @table_new: table @table_new already exists.", array('@table' => $table, '@table_new' => $new_name)));
  }

  $schema = $this->introspectSchema($table);

  // SQLite doesn't allow you to rename tables outside of the current
  // database. So the syntax '... RENAME TO database.table' would fail.
  // So we must determine the full table name here rather than surrounding
  // the table with curly braces in case the db_prefix contains a reference
  // to a database outside of our existing database.
  $info = $this->getPrefixInfo($new_name);
  $this->connection->query('ALTER TABLE {' . $table . '} RENAME TO ' . $info['table']);

  // Drop the indexes, there is no RENAME INDEX command in SQLite.
  if (!empty($schema['unique keys'])) {
    foreach ($schema['unique keys'] as $key => $fields) {
      $this->dropIndex($table, $key);
    }
  }
  if (!empty($schema['indexes'])) {
    foreach ($schema['indexes'] as $index => $fields) {
      $this->dropIndex($table, $index);
    }
  }

  // Recreate the indexes.
  $statements = $this->createIndexSql($new_name, $schema);
  foreach ($statements as $statement) {
    $this->connection->query($statement);
  }
}