I have the following table:
CREATE TABLE trip
(
id SERIAL PRIMARY KEY ,
gps_data_json jsonb NOT NULL
);
The JSON in gps_data_json contains an array of of trip objects with the following fields (sample data below):
- mode
- timestamp
- latitude
- longitude
I'm trying to get all rows that contain a certain "mode".
SELECT * FROM trip
where gps_data_json ->> 'mode' = 'WALK';
I pretty sure I'm using the ->> operator wrong, but I'm unsure who to tell the query that the JSONB field is an array of objects?
Sample data:
INSERT INTO trip (gps_data_json) VALUES
('[
{
"latitude": 47.063480377197266,
"timestamp": 1503056880725,
"mode": "TRAIN",
"longitude": 15.450349807739258
},
{
"latitude": 47.06362533569336,
"timestamp": 1503056882725,
"mode": "WALK",
"longitude": 15.450264930725098
}
]');
INSERT INTO trip (gps_data_json) VALUES
('[
{
"latitude": 47.063480377197266,
"timestamp": 1503056880725,
"mode": "BUS",
"longitude": 15.450349807739258
},
{
"latitude": 47.06362533569336,
"timestamp": 1503056882725,
"mode": "WALK",
"longitude": 15.450264930725098
}
]');