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GetRecordPropertyValue (Azure Stream Analytics)

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Returns the record value associated with the specified property.

Syntax

GetRecordPropertyValue ( record_expression, string_expression )

Arguments

record_expression

Is the record expression to be evaluated as a source record. record_expression can be a column of type Record or result of another function call.

string_expression

Is the string expression to be evaluated as a record property name.

Return Types

Return type is determined by the record property type and can be any of the supported types.

Remark

The record property name in the string expression needs to follow the naming convention in use.

To access a field or property that uses characters that need to be escaped, double quotes can be used: SELECT "[my][Field]" AS myField ..., or GetRecordPropertyValue(input.SensorReadings, "[my][Field]").

Examples

In this code example, "thresholds" is a reference data name defined on the inputs tab.

SELECT   
    input.DeviceID,  
    thresholds.SensorName  
FROM input  
JOIN thresholds   
ON  
    input.DeviceId = thresholds.DeviceId  
WHERE  
    GetRecordPropertyValue(input.SensorReadings, thresholds.SensorName) > thresholds.Value

Note that you can use dot notation to access record property fields.

SELECT   
    recordColumn.NestedFieldName1.NestedFieldName2  
FROM input

See also