toString (Function)
Function generates a JSON string corresponding to a given JSON object.
Syntax
<STRING> json:toString(<OBJECT> json)
Query Parameters
| Name | Description | Default Value | Possible Data Types | Optional | Dynamic |
|---|---|---|---|---|---|
| json | A valid JSON object to generates a JSON string. | OBJECT | No | Yes |
Example 1
json:toString(json)
The function json:toString(json) is utilized to convert a JSON object into a corresponding JSON string. When provided with a JSON object, this function serializes the object and outputs the JSON string. This conversion is useful in scenarios where the data needs to be stored or transmitted in a string format, as it allows for easy handling and communication.
Example 2
CREATE STREAM PersonJsonObjectStream (json object);
CREATE SINK STREAM PersonJsonStringStream (json string);
@info(name = 'ConvertToString')
INSERT INTO PersonJsonStringStream
SELECT json:toString(json) AS json
FROM PersonJsonObjectStream;
In this stream worker, two streams are defined: PersonJsonObjectStream for the input data and PersonJsonStringStream for the output.
The ConvertToString query listens for events from the PersonJsonObjectStream. Each event in this stream is a JSON object containing person details.
The function json:toString(json) is used in the query to convert each JSON object into a corresponding JSON string. The resulting JSON string is then inserted into the PersonJsonStringStream.
The query continuously processes each person's JSON object details from PersonJsonObjectStream, converts them into JSON strings, and feeds these strings into PersonJsonStringStream. This facilitates real-time conversion of JSON objects into JSON strings for storage or other processing tasks.