function db_drop_unique_key

Drops a unique key.

Parameters

$table: The table to be altered.

$name: The name of the key.

Related topics

Schema API: API to handle database schemas.

6 calls to db_drop_unique_key()

aggregator_update_7003 in drupal/modules/aggregator/aggregator.install: Increase the length of {aggregator_feed}.url.
node_update_7013 in drupal/modules/node/node.install: Change {node}.vid default value from 0 to NULL to avoid deadlock issues on MySQL.
search_update_7000 in drupal/modules/search/search.install: Replace unique keys in 'search_dataset' and 'search_index' by primary keys.
system_update_7042 in drupal/modules/system/system.install: Upgrade the {url_alias} table and create a cache bin for path aliases.
system_update_7073 in drupal/modules/system/system.install: Add binary to {file_managed}, in case system_update_7034() was run without it.

... See full list

File

drupal/includes/database/database.inc, line 2985: Core systems for the database layer.

Code

function db_drop_unique_key($table, $name) {
  return Database::getConnection()
    ->schema()
    ->dropUniqueKey($table, $name);
}