A extractor for DataGrip to export geojson file by sql query directly.
SELECT row_to_json(fc)
FROM (SELECT 'FeatureCollection' As type, array_to_json(array_agg(f)) As features
FROM (SELECT 'Feature' As type
, ST_AsGeoJSON(lg.geom, 4)::json As geometry
, row_to_json((SELECT l
FROM (SELECT loc_id, loc_name) As l
)) As properties
FROM locations As lg) As f) As fc;