public function _fieldData(string $table): array
	{
		$sql = 'SELECT "column_name", "data_type", "character_maximum_length", "numeric_precision", "column_default"
			FROM "information_schema"."columns"
			WHERE LOWER("table_name") = '
				. $this->escape(strtolower($table));

		if (($query = $this->query($sql)) === false)
		{
			throw new DatabaseException(lang('Database.failGetFieldData'));
		}
		$query = $query->getResultObject();

		$retVal = [];
		for ($i = 0, $c = count($query); $i < $c; $i ++)
		{
			$retVal[$i]             = new \stdClass();
			$retVal[$i]->name       = $query[$i]->column_name;
			$retVal[$i]->type       = $query[$i]->data_type;
			$retVal[$i]->default    = $query[$i]->column_default;
			$retVal[$i]->max_length = $query[$i]->character_maximum_length > 0 ? $query[$i]->character_maximum_length : $query[$i]->numeric_precision;
		}

		return $retVal;
	}