[PAY-2523] CollectionTrackRelations migration for sellable albums (#7677

)

packages/discovery-provider/ddl/migrations/0055_playlists_tracks.sql

@@ -0,0 +1,24 @@
+BEGIN;
+
+CREATE TABLE IF NOT EXISTS playlist_tracks (
+  playlist_id INTEGER NOT NULL,
+  track_id INTEGER NOT NULL,
+  is_removed BOOLEAN NOT NULL,
+  created_at TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  updated_at TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  PRIMARY KEY (playlist_id, track_id)
+);
+
+CREATE INDEX IF NOT EXISTS idx_playlist_tracks_track_id ON playlist_tracks USING btree (track_id, created_at);
+
+INSERT INTO playlist_tracks (playlist_id, track_id, is_removed) 
+SELECT playlist_id, track_id, FALSE
+FROM (
+    SELECT
+        playlist_id,
+        CAST(jsonb_array_elements(playlist_contents->'track_ids')->>'track' AS INTEGER) AS track_id
+    FROM playlists
+) AS subquery
+WHERE track_id IS NOT NULL ON CONFLICT DO NOTHING;
+
+COMMIT;