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Improved DB cleanup

This commit is contained in:
krateng 2022-04-07 21:21:00 +02:00
parent 9f26cce34b
commit 40c0edb06f
1 changed files with 22 additions and 22 deletions
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44
maloja/database/sqldb.py
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@ -700,34 +700,34 @@ def clean_db():
with SCROBBLE_LOCK:
with engine.begin() as conn:
#log(f"Database Cleanup...")
log(f"Database Cleanup...")
### Delete tracks that have no scrobbles (delete their trackartist entries first)
a1 = conn.execute(sql.text('''
delete from trackartists where track_id in (select id from tracks where id not in (select track_id from scrobbles))
''')).rowcount
a2 = conn.execute(sql.text('''
delete from tracks where id not in (select track_id from scrobbles)
''')).rowcount
to_delete = [
# tracks with no scrobbles (trackartist entries first)
"from trackartists where track_id in (select id from tracks where id not in (select track_id from scrobbles))",
"from tracks where id not in (select track_id from scrobbles)",
# artists with no tracks
"from artists where id not in (select artist_id from trackartists) and id not in (select target_artist from associated_artists)",
# tracks with no artists (scrobbles first)
"from scrobbles where track_id in (select id from tracks where id not in (select track_id from trackartists))",
"from tracks where id not in (select track_id from trackartists)"
]
if a2+a1>0: log(f"Deleted {a2} tracks without scrobbles ({a1} track artist entries)")
for d in to_delete:
selection = conn.execute(sql.text(f"select * {d}"))
for row in selection.all():
log(f"Deleting {row}")
deletion = conn.execute(sql.text(f"delete {d}"))
### Delete artists that have no tracks
a3 = conn.execute(sql.text('''
delete from artists where id not in (select artist_id from trackartists) and id not in (select target_artist from associated_artists)
''')).rowcount
log("Database Cleanup complete!")
if a3>0: log(f"Deleted {a3} artists without tracks")
### Delete tracks that have no artists (delete their scrobbles first)
a4 = conn.execute(sql.text('''
delete from scrobbles where track_id in (select id from tracks where id not in (select track_id from trackartists))
''')).rowcount
a5 = conn.execute(sql.text('''
delete from tracks where id not in (select track_id from trackartists)
''')).rowcount
if a5+a4>0: log(f"Deleted {a5} tracks without artists ({a4} scrobbles)")
#if a2+a1>0: log(f"Deleted {a2} tracks without scrobbles ({a1} track artist entries)")
#if a3>0: log(f"Deleted {a3} artists without tracks")
#if a5+a4>0: log(f"Deleted {a5} tracks without artists ({a4} scrobbles)")