JSON_TYPE

Returns the datatype of the outermost element of an input JSON object or array and path.

See also:
[SELECT] [DESCRIBE] [JSON_EXTRACT] [ Data Types ]

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tip

Use the DESCRIBE function to locate array or object datatypes which can be used with StackQL JSON functions.

note

The json_type function is implemented as the json_typeof function if you are using stackql with a postgres sql backend

Syntax

SELECT JSON_TYPE(json_array_or_object, json_path) 
FROM <multipartIdentifier>;

Arguments

json_array_or_object
A JSON array or object.

json_path
The JSON path to an array or object contained within an json_array_or_object. See jsonpath.com.

If json_path does not exist in json_array_or_object, then the function returns NULL.

The json_type() function throws an error if any of its arguments are not well-formed.

Return Value(s)

A string representing the resolved datatype.

Datatypes include null, true, false, integer, real, text, array, or object.

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Examples

Return the datatype of a field nested within a JSON object or array

SELECT json_type(disks, '$[0].licenses[0]') as datatype
FROM google.compute.instances 
WHERE project = 'stackql-demo' 
AND zone = 'australia-southeast1-a';
/* returns text */

For more information, see https://www.sqlite.org/json1.html#jtype