private bool Migrate_40 ()
{
Execute(@"
CREATE TABLE CoreShuffleDiscards (
ShufflerId INTEGER,
TrackID INTEGER,
LastDiscardedAt INTEGER,
CONSTRAINT one_entry_per_track UNIQUE (ShufflerID, TrackID)
)
");
Execute("CREATE INDEX CoreShuffleDiscardsIndex ON CoreShuffleDiscards (ShufflerId, TrackID, LastDiscardedAt)");
return true;
}