Point Lookup¶

This stage queries the tags of a specified asset measurement point. The functions of this stage include:

Supporting the querying of the information of a point related to the input record.
Supporting the querying of the specified tags.
Supporting the querying of the customized pointId, which must belong to the same device with the input point.
Attaching queried results in the /attr/tslPointLookup field.

Configuration¶

The configuration tabs for this stage are General, Basic, Input/Output, and Criteria.

Name	Required?	Description
Name	Yes	The name of the stage.
Description	No	The description of the stage.
Stage Library	Yes	The streaming operator library to which the stage belongs.
Required Fields	No	The fields that the data records must contain. If the specified fields are not included, the record will be filtered out.
Preconditions	No	The conditions that must be satisfied by the data records. Records that do not meet the conditions will be filtered out. For example, `${record:value('/value') > 0}`. For the syntax of EL expressions, see Expression Language.
On Record Error	Yes	The processing method for error data. Discard: Error data will be discarded and ignored Send to Error: Error messages will be reported Stop Pipeline: The pipeline will be stopped

Name	Required?	Description
Quality Filter	No	Filter the data according to the data quality. Only records that meet the quality conditions will be processed by this stage.

Name	Required?	Description
Input/Output	Yes	The measurement point attribute data that is attached to each record. Specify the input points that hold the measurement point attribute data, and the output points that receive the queried results.
Input Point	Yes	Specify the input point that holds the measurement point attribute data, using the format {modelId}::{pointId}.
Output Point	Yes	Specify the output point that receives the queried results, using the format {modelId}::{pointId}.

Name	Required?	Description
Tag	No	Specify whether to query the measurement point attribute data by tags.
Extra	No	Specify whether to query the measurement point attribute data by other information, such as name, desc, accessMode, dataType, createTime, priority, unit, signalType, and hasQuality.

The output results of this stage are included in the attr struct. The description of the fields as follows:

Name	Data Type	Description
/attr/tslPointLookup	Point	The point attribute information object.
tags	Map	The list of measuring point tags.