function DatabaseSchema_pgsql::addUniqueKey
DatabaseSchema_pgsql::addUniqueKey($table, $name, $fields)
Add a unique key.
Parameters
$table: The table to be altered.
$name: The name of the key.
$fields: An array of field names.
Throws
DatabaseSchemaObjectDoesNotExistException If the specified table doesn't exist.
DatabaseSchemaObjectExistsException If the specified table already has a key by that name.
Overrides DatabaseSchema::addUniqueKey
File
- includes/database/pgsql/schema.inc, line 456
- Database schema code for PostgreSQL database servers.
Class
Code
function addUniqueKey($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->constraintExists($table, $name . '_key')) { throw new DatabaseSchemaObjectExistsException(t("Cannot add unique key @name to table @table: unique key already exists.", array('@table' => $table, '@name' => $name))); } $this->connection->query('ALTER TABLE {' . $table . '} ADD CONSTRAINT "' . $this->prefixNonTable($table, $name, 'key') . '" UNIQUE (' . implode(',', $fields) . ')'); }
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