Request: Handling for objects in json_extract_values function about bigquery-utils

[sgoley]

Alternative might be to build something like this as a whole separate UDF:

-- extract all key value pairs as an array from a json dict
-- input: json string with a dictionary
-- returns:  list of struct <key, value>
CREATE TEMP  FUNCTION EXTRACT_KV_PAIRS(json_str STRING)
RETURNS ARRAY<STRUCT<key STRING, value STRING>>
LANGUAGE js AS """
  try{ 
    const json_dict = JSON.parse(json_str); 
    const all_kv = Object.entries(json_dict).map(
        (r)=>Object.fromEntries([["key", r[0]],["value",  
                                   JSON.stringify(r[1])]]));
    return all_kv;
  } catch(e) { return [{"key": "error","value": e}];}
""";

Source: https://medium.com/google-cloud/extracting-json-key-value-pairs-in-bigquery-1bb9d0ec0b6d