public function DatabaseSchema_sqlite::addUniqueKey
public DatabaseSchema_sqlite::addUniqueKey($table, $name, $fields)
Add a unique key.
Parameters
$table: The table to be altered.
$name: The name of the key.
$fields: An array of field names.
Throws
DatabaseSchemaObjectDoesNotExistException If the specified table doesn't exist.
DatabaseSchemaObjectExistsException If the specified table already has a key by that name.
Overrides DatabaseSchema::addUniqueKey
File
- includes/database/sqlite/schema.inc, line 592
- Database schema code for SQLite databases.
Class
Code
public function addUniqueKey($table, $name, $fields) { if (!$this->tableExists($table)) { throw new DatabaseSchemaObjectDoesNotExistException(t("Cannot add unique key @name to table @table: table doesn't exist.", array('@table' => $table, '@name' => $name))); } if ($this->indexExists($table, $name)) { throw new DatabaseSchemaObjectExistsException(t("Cannot add unique key @name to table @table: unique key already exists.", array('@table' => $table, '@name' => $name))); } $schema['unique keys'][$name] = $fields; $statements = $this->createIndexSql($table, $schema); foreach ($statements as $statement) { $this->connection->query($statement); } }
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https://api.drupal.org/api/drupal/includes!database!sqlite!schema.inc/function/DatabaseSchema_sqlite::addUniqueKey/7.x