TOJSONMAPSTR

This section contains reference documentation for the TOJSONMAPSTR function.

Convert map to JSON String. This function can only be used in an ingestion transformation function.
Signature
TOJSONMAPSTR(map)
Usage Examples
The usage examples are based on extracting fields from the following JSON document:
{"timestamp": "2019-10-09 21:25:25", "meta": {"age": 12}}
Expression
Value
TOJSONMAPSTR(meta)
"{\"age\":12}"
This function can be used in the table config to extract the meta property into the data column, as described below:
{
   "tableConfig":{
      "ingestionConfig":{
         "transformConfigs":[
            {
               "columnName":"data",
               "transformFunction":"TOJSONMAPSTR(meta)"
            }
         ]
      }
   }
}

Expression	Value
`TOJSONMAPSTR(meta)`	`"{\"age\":12}"`

ToEpochRounded

toGeometry

Last modified 1yr ago