xxq250
/
homework-jianmu
1
0
Fork 0
Code Issues Pull Requests 1 Actions Packages Projects Releases Wiki Activity

docs(stream)

This commit is contained in:
Liu Jicong 2022-12-17 19:11:43 +08:00
parent ba8a65a158
commit ab9c07c420
2 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
docs/en/12-taos-sql/14-stream.md
View File

@ -78,13 +78,13 @@ create stream if not exists s1 fill_history 1 into st1 as select count(*) from
Combining fill_history option and where clause, stream can processing data of specific time range. For example, only process data after a past time. (In this case, 2020-01-30) Combining fill_history option and where clause, stream can processing data of specific time range. For example, only process data after a past time. (In this case, 2020-01-30)
```sql ```sql
create stream if not exists s1 fill_history 1 into st1 as select count(*) from t1 where ts > timestamp '2020-01-30' interval(10s) create stream if not exists s1 fill_history 1 into st1 as select count(*) from t1 where ts > '2020-01-30' interval(10s)
``` ```
As another example, only processing data starting from some past time, and ending at some future time. As another example, only processing data starting from some past time, and ending at some future time.
```sql ```sql
create stream if not exists s1 fill_history 1 into st1 as select count(*) from t1 where ts > timestamp '2020-01-30' and ts < timestamp '2023-01-01 '> interval(10s) create stream if not exists s1 fill_history 1 into st1 as select count(*) from t1 where ts > '2020-01-30' and ts < '2023-01-01' interval(10s)
``` ```
If some streams are totally outdated, and you do not want it to monitor or process anymore, those streams can be manually dropped and output data will be still kept. If some streams are totally outdated, and you do not want it to monitor or process anymore, those streams can be manually dropped and output data will be still kept.

4
docs/zh/12-taos-sql/14-stream.md
View File

@ -79,13 +79,13 @@ create stream if not exists s1 fill_history 1 into st1 as select count(*) from
结合 fill_history 1 选项，可以实现只处理特定历史时间范围的数据，例如：只处理某历史时刻（2020年1月30日）之后的数据 结合 fill_history 1 选项，可以实现只处理特定历史时间范围的数据，例如：只处理某历史时刻（2020年1月30日）之后的数据
```sql ```sql
create stream if not exists s1 fill_history 1 into st1 as select count(*) from t1 where ts > timestamp '2020-01-30' interval(10s) create stream if not exists s1 fill_history 1 into st1 as select count(*) from t1 where ts > '2020-01-30' interval(10s)
``` ```
再如，仅处理某时间段内的数据，结束时间可以是未来时间 再如，仅处理某时间段内的数据，结束时间可以是未来时间
```sql ```sql
create stream if not exists s1 fill_history 1 into st1 as select count(*) from t1 where ts > timestamp '2020-01-30' and ts < timestamp '2023-01-01 '> interval(10s) create stream if not exists s1 fill_history 1 into st1 as select count(*) from t1 where ts > '2020-01-30' and ts < '2023-01-01' interval(10s)
``` ```
如果该流任务已经彻底过期，并且您不再想让它检测或处理数据，您可以手动删除它，被计算出的数据仍会被保留。 如果该流任务已经彻底过期，并且您不再想让它检测或处理数据，您可以手动删除它，被计算出的数据仍会被保留。