Questions tagged [apache-iotdb]
Questions related to the Apache IoTDB Project (https://iotdb.apache.org/). Apache IoTDB (Database for Internet of Things) is an IoT native database with high performance for data management and analysis, deployable on the edge and the cloud.
apache-iotdb
418
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2
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How to import local files with `load-tsfile` in Apache IoTDB? [closed]
I'm currently working on a project using Apache IoTDB, and I'm encountering some issues with the load-tsfile command during data import. Here is the scenario:
I have two servers, Server A and Server ...
- 71
2
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0
answers
17
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How to delete physical quantities in device template in Apache IoTDB 1.3? [closed]
I've been working with Apache IoTDB version 1.3 and I'm trying to modify a device template by removing some physical quantities. The documentation and official guides only provide information on how ...
2
votes
0
answers
26
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How to clean time series tables in badges in Apache IoTDB apart from void deleteTimeseries? [closed]
I'm trying to delete a large number of time series tables in batches using Apache IoTDB (version 1.2.2). My current approach involves calling the method void deleteTimeseries(List<String> paths)....
- 37
-1
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1
answer
38
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When using mqtt to insert data into Apache IoTDB, why unrecoverable_error reported in the system?
I currently use mqtt bridges data to Apache IoTDB, and uses the http rule action method to connect to IoTDB's RESTful v1 interface. I think the settings are fine, but why can't I insert the data ...
- 112
-4
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1
answer
25
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Why did the view failed to be created when using `create view` command in Apache IoTDB?
I would like to ask why did I fail to create the view using the sql statement example on the official website? The error reported View is not supported. My statements executed in step order are:
1....
- 399
0
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1
answer
27
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When exporting data from Apache IoTDB, why did the `not allowed to write out-of-order data` error reported?
How should I solve this error when exporting data for "select * from root.** from Apache IoTDB? The error information is Cannot dump result because: Not allowed to write out-of-order data in ...
- 186
-1
votes
1
answer
27
views
How to solve the session pool occcupation stuck problem in Apache IoTDB?
Apache IoTDB often get stuck in SessionPool, and the system reported org.apache.iotdb.session.pool.SessionPool: current occupied size 50, queue size 0, considered size 50. After this information, the ...
- 112
-1
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1
answer
23
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For unequal time reporting intervals in Apache IoTDB, how to interpolate and return the data in equal time interval pattern?
I have data with irregular data spacing for time reported, such as 1s, 5s, 11s and so on. I want to return data results at equal intervals of two seconds, and the data that is not reported for this ...
- 140
0
votes
1
answer
19
views
How to add time condition to the `count` query statement of the total fields for certain path in Apache IoTDB?
Can time conditions be added to the syntax for counting the total amount of fields under a certain path in Apache IoTDB? I tried command count TIMESERIES root.OLC, and this query is executed ...
- 153
0
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1
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21
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How to write the query statement to query the data few hours before the current time in Apache IoTDB?
In the sql syntax of Apache IoTDB, are there any examples of how to write the query statement of querying the data for a few hours before the current time? I tried two ways of writing but it didn’t ...
- 112
0
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1
answer
20
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How to set the time column result returned by Apache IoTDB to a string data type?
Does the time column in the Apache IoTDB query result have to be a timestamp? Can I specify the data type of time returned? Such as for original data column 1710972000000, I hope it will be returned ...
- 157
-1
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1
answer
37
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How to set multiple ip addresses for the string url setting in jdbc api of Apache IoTDB?
I am now using jdbc API included in Apache IoTDB. When I try to setpublic static Connection getConnection(){String driver ="org.apache.iotdb.jdbc.IoTDBDriver'; String url = "jdbc:iotdb://127....
- 156
-1
votes
1
answer
21
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In version 1.2 of Apache IoTDB cluster, how to troubleshoot the reason for the timeout of all query tasks? [closed]
I am using the cluster version 1.2 of Apache IoTDB, and the query task was stuck just now. I tried to execute show query processlist to check for reason, but this task also directly get timed out. I ...
- 119
0
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1
answer
23
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How to start CDC in flink sql connector of Apache IoTDB version 1.3.0?
Both the server and the client I am using now are Apache IoTDB version 1.3.0. I want to use the CDC function in Flink SQL IoTDB Connector, but after I completed all configuration settings, seems like ...
- 140
0
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1
answer
17
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How to add the table header for the query results returned by python API in Apache IoTDB?
When querying data in Apache IoTDB, some measures have values and some do not, how do you determine which measure the final query results belongs to? For example. select a, b, c from root.it.sa limit ...
- 112