The functions described in this section perform operations on JSON values. For discussion of the JSON data type and additional examples showing how to use these functions, see Section 13.5, “The JSON Data Type”.

For functions that take a JSON argument, an error occurs if the argument is not a valid JSON value. Arguments parsed as JSON are indicated by json_doc; arguments indicated by val are not parsed.

Functions that return JSON values always perform normalization of these values (see Normalization, Merging, and Autowrapping of JSON Values), and thus orders them. The precise outcome of the sort is subject to change at any time; do not rely on it to be consistent between releases.

A set of spatial functions for operating on GeoJSON values is also available. See Section 14.16.11, “Spatial GeoJSON Functions”.