Querying Postgres 9.6 JSONB array of objects

Question

I have the following table:

CREATE TABLE trip
(
    id SERIAL PRIMARY KEY ,
    gps_data_json jsonb NOT NULL
);

The JSON in gps_data_json conta

Answer 1

The problem arises because ->> operator cannot walk through array:

• First unnest your json array using json_array_elements function;
• Then use the operator for filtering.

Following query does the trick:

WITH 
A AS (
SELECT
    Id
   ,jsonb_array_elements(gps_data_json) AS point
FROM trip
)
SELECT *
FROM A
WHERE (point->>'mode') = 'WALK';

Answer 2

Unnesting the array works fine, if you only want the objects containing the values queried. The following checks for containment and returns the full JSONB:

SELECT * FROM trip
WHERE gps_data_json @> '[{"mode": "WALK"}]';

See also Postgresql query array of objects in JSONB field