Hi, Good feature.
> alter timeseries root.turbine.d1.s1 set tag1=newV1 > alter timeseries root.turbine.d1.s1 drop tag1 > alter timeseries root.turbine.d1.s1 add TAG tag3=v3 > alter timeseries root.turbine.d1.s1 add ATTRIBUTE tag3=v3 In these four statements, only one tag can be involved for each statement? I mean, how about "alter ...... drop tag1, tag2..." Best, ----------------------------------- Xiangdong Huang School of Software, Tsinghua University 黄向东 清华大学 软件学院 Jialin Qiao <[email protected]> 于2020年4月24日周五 下午4:20写道： > Hi, > > This is a good feature :) > > Thanks, > -- > Jialin Qiao > School of Software, Tsinghua University > > 乔嘉林 > 清华大学 软件学院 > > > -----原始邮件----- > > 发件人: "田原" <[email protected]> > > 发送时间: 2020-04-24 09:31:39 (星期五) > > 收件人: [email protected] > > 抄送: > > 主题: Add alter Syntax for tag management > > > > Hi, > > > > > > Currently, we only support adding tag and attribute for one time series > while creating it. We can't update it, drop it or add a new tag/attribute. > > So, I want to add the alter syntax to improve the functionality of the > tag management. > > > > > > I plan to support the following five alter syntax: > > > > > > alter timeseries root.turbine.d1.s1 rename tag1 to newTag1 > > alter timeseries root.turbine.d1.s1 set tag1=newV1 > > alter timeseries root.turbine.d1.s1 drop tag1 > > alter timeseries root.turbine.d1.s1 add TAG tag3=v3 > > alter timeseries root.turbine.d1.s1 add ATTRIBUTE tag3=v3 > > > > > > The first one is used to change a tag/attribute key name. > > The second one is used to change an existing tag/attribute's value, it > will throw exception if the tag/attribute doesn't exist. > > The third one is used to drop an existing tag/attribute if it exists. > > The Fourth one is used to add a new tag, if it has existed, it will > throw exception. > > The fifth one is used to add a new attribute, if it has existed, it will > throw exception. >
