function Schema::addUniqueKey

Same name in this branch

11.1.x core/lib/Drupal/Core/Database/Schema.php \Drupal\Core\Database\Schema::addUniqueKey()
11.1.x core/modules/sqlite/src/Driver/Database/sqlite/Schema.php \Drupal\sqlite\Driver\Database\sqlite\Schema::addUniqueKey()
11.1.x core/modules/mysql/src/Driver/Database/mysql/Schema.php \Drupal\mysql\Driver\Database\mysql\Schema::addUniqueKey()

Overrides Schema::addUniqueKey

1 call to Schema::addUniqueKey()

Schema::_createKeys in core/modules/pgsql/src/Driver/Database/pgsql/Schema.php

File

core/modules/pgsql/src/Driver/Database/pgsql/Schema.php, line 811

Class

Schema: PostgreSQL implementation of \Drupal\Core\Database\Schema.

Namespace

Drupal\pgsql\Driver\Database\pgsql

Code

public function addUniqueKey($table, $name, $fields) {
    if (!$this->tableExists($table)) {
        throw new SchemaObjectDoesNotExistException("Cannot add unique key '{$name}' to table '{$table}': table doesn't exist.");
    }
    if ($this->constraintExists($table, $name . '__key')) {
        throw new SchemaObjectExistsException("Cannot add unique key '{$name}' to table '{$table}': unique key already exists.");
    }
    // Use the createPrimaryKeySql(), which already discards any prefix lengths
    // passed as part of the key column specifiers. (Postgres doesn't support
    // setting a prefix length for PRIMARY or UNIQUE indices.)
    $this->connection
        ->query('ALTER TABLE {' . $table . '} ADD CONSTRAINT ' . $this->ensureIdentifiersLength($table, $name, 'key') . ' UNIQUE (' . $this->createPrimaryKeySql($fields) . ')');
    $this->resetTableInformation($table);
}