function db_drop_unique_key
db_drop_unique_key($table, $name)
Drops a unique key.
Parameters
$table: The table to be altered.
$name: The name of the key.
Return value
bool TRUE if the key was successfully dropped, FALSE if there was no key by that name to begin with.
Deprecated
as of Drupal 8.0.x, will be removed in Drupal 9.0.0. Instead, get a database connection injected into your service from the container, get its schema driver, and call dropUniqueKey() on it. For example, $injected_database->schema()->dropUniqueKey($table, $name);
See also
\Drupal\Core\Database\Schema::dropUniqueKey()
Related topics
- Schema API
- API to handle database schemas.
File
- core/includes/database.inc, line 902
- Core systems for the database layer.
Code
function db_drop_unique_key($table, $name) {
return Database::getConnection()->schema()->dropUniqueKey($table, $name);
}
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https://api.drupal.org/api/drupal/core!includes!database.inc/function/db_drop_unique_key/8.1.x