Storing encoded polyline using PostGIS

Question

I'm entirely new to PostGIS and trying to store encoded_polylines to test some proximity searches with lat/long points. So, I created a simple table composed of a pkid, an encoded polyline, and a polyline containing the line strings of the encoded polyline.

So, the table is like below:

CREATE TABLE test(
    pkid bigint NOT NULL,
    encoded_polyline text COLLATE pg_catalog."default",
    polyline geometry,
    CONSTRAINT test_pkey PRIMARY KEY (pkid),
);

CREATE INDEX IF NOT EXISTS test_polyline_idx
ON test USING gist(polyline) TABLESPACE pg_default;

CREATE INDEX IF NOT EXISTS test_polyline_geog_idx
ON test USING gist(geography(polyline)) TABLESPACE pg_default;

I've created 2 indexes on the polyline geom according this article

What is the best option if I want to test if a point is within a 10 km range from the polyline?

Method 1: only store the encoded polyline and use ST_LineFromEncodedPolyline

SELECT pkid FROM test
WHERE ST_DWithin(ST_SetSRID(ST_MakePoint(13.03,52.33), 4326)::geography, ST_LineFromEncodedPolyline(encoded_polyline)::geography, 10* 1609.34)

Method 2: Only store the unencoded polyline and query it directly

SELECT pkid FROM test
WHERE ST_DWithin(ST_SetSRID(ST_MakePoint(13.03,52.33), 4326)::geography, polyline::geography, 10* 1609.34)