I think we may meet the requirements of matching 0-1 level in the future, then
*** may be not a good design.
As a single * stands for exactly 1 level now, we can define *{start, end} to
[start, end) levels, {x} to exactly x levels and {*} to arbitrary levels, where
** is just a short representation of *{*}.
So it's easy to represent 0 or more layers using *{0, *}.
在 2022/6/21 14:44，“Xiangdong Huang” 写入:
Hi,
- if only for 0 or more layers, I opt for ***
- if we want to define a clear range of layers, I opt for *{start, end} or
**{start, end}
---
Xiangdong Huang
School of Software, Tsinghua University
黄向东
清华大学 软件学院
guoguan...@qq.com.INVALID 于2022年6月21日周二 10:14写道：
> Hi guys!
> Now IoTDB supports the following path patterns:
> * (1 asterisk) - one layer
> ** (2 asterisks) - one or more layers
>
>We need to support a new path pattern: 0 or one or more layers, there
> are some optional schemes:
>Scheme 1, support it directly with a specific syntax:
> *** (3 asterisks) - 0 or one or more layers
>
>Scheme 2, use more common syntax:
> a special symbol (such as $, or someone else) - 0 or 1 layer
> $* - 0 or 1 or more layers
>
> JIRA:
https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fissues.apache.org%2Fjira%2Fbrowse%2FIOTDB-3450data=05%7C01%7C%7Ccbc22404c72843af731208da53518d0d%7C84df9e7fe9f640afb435%7C1%7C0%7C637913906992358086%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7Csdata=aiZyCx7gbDsIaiVP37%2BB6vc3s6kymBDiw%2FqmdB3igLQ%3Dreserved=0
>
> Any ideas?
>
>
>
> guoguan...@qq.com
>
