diff -u b/core/lib/Drupal/Core/Database/Driver/pgsql/Schema.php b/core/lib/Drupal/Core/Database/Driver/pgsql/Schema.php
--- b/core/lib/Drupal/Core/Database/Driver/pgsql/Schema.php
+++ b/core/lib/Drupal/Core/Database/Driver/pgsql/Schema.php
@@ -353,19 +353,10 @@
    * {@inheritdoc}
    */
   public function copyTable($source, $destination) {
-    if (!$this->tableExists($source)) {
-      throw new SchemaObjectDoesNotExistException(String::format("Cannot copy @source to @destination: table @source doesn't exist.", array('@source' => $source, '@destination' => $destination)));
-    }
-    if ($this->tableExists($destination)) {
-      throw new SchemaObjectExistsException(String::format("Cannot copy @source to @destination: table @destination already exists.", array('@source' => $source, '@destination' => $destination)));
-    }
     // @TODO The server is likely going to rename indexes and constraints
     //   during the copy process, and it will not match our
     //   table_name + constraint name convention anymore.
-    throw new \Exception('Not implemented, see https://drupal.org/node/2056133');
-    // This is how the implementation could look like:
-    $info = $this->getPrefixInfo($destination);
-    return $this->connection->query('CREATE TABLE `' . $info['table'] . '` (LIKE {' . $source . '} INCLUDING ALL)');
+    throw new \Exception('Not implemented, see https://drupal.org/node/2061879');
   }
 
   public function dropTable($table) {
diff -u b/core/lib/Drupal/Core/Database/Schema.php b/core/lib/Drupal/Core/Database/Schema.php
--- b/core/lib/Drupal/Core/Database/Schema.php
+++ b/core/lib/Drupal/Core/Database/Schema.php
@@ -408,7 +408,7 @@
   abstract public function dropTable($table);
 
   /**
-   * Copies the structure of a table without copying the content.
+   * Copies the table schema.
    *
    * @param string $source
    *   The name of the table to be used as source.