JSON_POINTER_EXTRACT_VALUES

Reference material for JSON_POINTER_EXTRACT_VALUES function

Accepts a JSON document and pointer expression. If the key exists and holds a JSON object (map), JSON_POINTER_EXTRACT_VALUES returns all the values in that object as SQL ARRAY(TEXT), while the values remain raw as they appeared in the original JSON document. Otherwise, it returns NULL.

Syntax

JSON_POINTER_EXTRACT_VALUES
(<json>, <json_pointer_expression>)

Parameters

Parameter	Description	Supported input types
<json>	The JSON document.	TEXT
<json_pointer_expression>	A JSON pointer expression to the location of the desired sub-document in the JSON. For more information, see JSON pointer expression syntax.	TEXT

Return Type

ARRAY(TEXT)

• If any input values are NULL, the function will return NULL.

Examples

For the JSON document indicated by <json_common_example> below, see JSON common example. The returned result is based on the following example.

Example

The following code example extracts all the values at path /value/events/0/EventProperties from the JSON document, and returns the raw values as SQL ARRAY(TEXT), labeled as res:

SELECT JSON_POINTER_EXTRACT_VALUES(<json_common_example>, '/value/events/0/EventProperties') AS res

Returns

The previous code example returns the following:

res (ARRAY(TEXT))
{'"John Doe"', 'true'}

Example

The following code example attempts to extract the keys at the path /value/no_such_key from the JSON document:

SELECT JSON_POINTER_EXTRACT_VALUES(<json_common_example>, '/value/no_such_key') AS res

Returns

The previous code example returns the NULL with the result labeled as res, because the key does not exist:

res (ARRAY(TEXT))
NULL

Example

The following code example attempts to extract the value at the path /value/keywords from the JSON document:

SELECT JSON_POINTER_EXTRACT_VALUES(<json_common_example>,'/value/keywords') AS res

Returns

The previous code example returns NULL, labeled as res because the value at the specified path is an array, not an object:

res (ARRAY(TEXT))
NULL