[New Feature] PB Tree for Massive Schema Management

Hi, We're going to introduce PB Tree (Prefix-B+ Tree), a new SchemaEgnine mode, in V1.2.0, which supports evict temporarily useless schema to disk and load them back in need at runtime. With PB Tree, users will not suffer from memory constraint for schema management any more, especially in

Re: 回复: Add constraint to the length of database name

; 收件人: dev@iotdb.apache.org<mailto:dev@iotdb.apache.org> > 主题: Re: Add constraint to the length of database name > > +1 > — > Jialin Qiao > Apache IoTDB PMC > > 周钰坤 于2022年11月18日周五 15:44写道： > > Hi, > > We want to add constraint to the length of

Re: Add constraint to the length of database name

时间: 2022年11月18日 16:15 > 收件人: dev@iotdb.apache.org<mailto:dev@iotdb.apache.org> > 主题: Re: Add constraint to the length of database name > > +1 > ————— > Jialin Qiao > Apache IoTDB PMC > > 周钰坤 于2022年11月18日周五 15:44写道： > > > > Hi, > > &

Add constraint to the length of database name

Hi, We want to add constraint to the length of database name, as most popular database systems have such constraint as well, for example the length of database name in Mysql shall not exceed 64. Currently, the maximum length of database name, including "root.", is *64* and it is immutable.

Re: [IOTDB-3800]Add Node Type Column to 'SHOW CHILD PATHS' query

Good idea! To stick to our user guidance, the leaf node type should be named measurement, since the timeseries stands for a full path from root to leaf in metadata tree. -- Yukun Zhou Tsinghua University Zhou Yifu 于2022年7月11日周一 21:57写道： > > Hi all, > > Currently our show

Re: [VOTE] Apache IoTDB 0.12.6 RC1 release

+1 --- Yukun Zhou Tsinghua University Yuan Tian 于2022年7月8日周五 18:08写道： > > Hi all, > > Apache IoTDB 0.12.6 is a bug-fix version from 0.12.5. You can get its > mainly changes from [5]. > > Apache IoTDB 0.12.6 has been staged under [2] and it’s time to vote > on accepting it for

Re: The structure of distribution

I think the choice 2 is better, since configNode and dataNode will be deployed separately and multi-replica means the dir will be copied. SpriCoder 于2022年7月6日周三 12:04写道： > > To more specific: > In Choice 1, folders in apache-iotdb-0.14.0-SNAPSHOT-all-bin will like that: > ├── sbin > ├── conf >

Refactor the rule of auth check

and performance of auth check, we will implement the auth check after the generation of statement and before the execution of statement. Hope for some suggestions. Best Yukun Zhou School of Software, Tsinghua University 周钰坤 清华大学 软件学院

Re: [DISCUSS] Recommend Select * OR Select ** In IOTDB-SQL

th. Best Yukun Zhou School of Software, Tsinghua University 周钰坤 清华大学 软件学院 Xiangwei Wei 于2021年9月17日周五 上午9:27写道： > > Hi, > > The first question is: does single star * represent only single path node > later? > > And I support one new example, since

[DISCUSS] Recommend Select * OR Select ** In IOTDB-SQL

and presentation, define entities clearly in sql from clause and IoTDB will run more stable. That's why the second one prevails. Look forward to your suggestions. Best Yukun Zhou School of Software, Tsinghua University 周钰坤 清华大学 软件学院

[Discuss] Wildcard Improvement In IoTDB-SQL

- Yukun Zhou School of Software, Tsinghua University 周钰坤 清华大学 软件学院

[Discuss] Wildcard Improvement In IoTDB-SQL

We want to introduce a new wildcard **, to improve the DDL and DML of IoTDB-SQL. As we all know, a time series is represented by a full path from the root node to the measurement node in the metadata tree. The existing wildcard *, when used in the path, represents one level of the metadata tree

Re: discuss wildcard improvement in IoTDB-SQL

"root.sg.d.a.s", while "select ** from root.sg.d" will query them all. Of course, we want to implement precise path match in DML too. Best - Yukun zhou School of software, Tsinghua University 周钰坤 清华大学 软件学院 Xiangdong Huang 于2021年8月27日周五 下午1:47写道： > > Hi, > &g

discuss wildcard improvement in IoTDB-SQL

e "select ** from root.sg.d" will query them all. Of course, we want to implement *precise path match* in DML too. Best - Yukun zhou School of software, Tsinghua University 周钰坤 清华大学 软件学院

Re: Measurement Template New Constraints

a University > > 黄向东 > 清华大学 软件学院 > > > Jialin Qiao 于2021年7月24日周六 下午2:40写道： > > > +1 > > — > > Jialin Qiao > > School of Software, Tsinghua University > > > > 乔嘉林 > > 清华大学 软件学院 > > > > > > 周钰坤 于2021年7月2

Measurement Template New Constraints

Hi, Apache IoTDB supports Measurement Template feature from version 0.13. The current version allows user to set different templates to different nodes of a path and the nearest template to current node will be valid. This will result in schema and data lost while user set a new template,

Metadata New Function and Restriction

Hi, The following changes will be involved into metadata module of current version(0.13) 1. It will be forbidden to set a MeasurementMNode as a device or add new measurement under an existing MeasurementMNode, which means the MeasurementMNode will be the leaf of MTree. 2. The implementation of