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Schema API

A Drupal schema definition is an array structure representing one or more tables and their related keys and indexes. A schema is defined by hook_schema(), which usually lives in a modulename.install file.

Code

includes/database/mysql/schema.inc, line 326

<?php
public function addUniqueKey(&$ret, $table, $name, $fields) {
  $ret[] = update_sql('ALTER TABLE {' . $table . '} ADD UNIQUE KEY ' . $name . ' (' . $this->createKeySql($fields) . ')');
}
?>