zeroshade commented on code in PR #401: URL: https://github.com/apache/iceberg-go/pull/401#discussion_r2070861384
########## table/transaction.go: ########## @@ -142,6 +143,120 @@ func (t *Transaction) SetProperties(props iceberg.Properties) error { return nil } +type expireSnapshotsCfg struct { + minSnapshotsToKeep *int + maxSnapshotAgeMs *int64 +} + +type ExpireSnapshotsOpt func(*expireSnapshotsCfg) + +func WithRetainLast(n int) ExpireSnapshotsOpt { + return func(cfg *expireSnapshotsCfg) { + cfg.minSnapshotsToKeep = &n + } +} + +func WithOlderThan(t time.Duration) ExpireSnapshotsOpt { + return func(cfg *expireSnapshotsCfg) { + n := t.Milliseconds() + cfg.maxSnapshotAgeMs = &n + } +} + +func (t *Transaction) ExpireSnapshots(opts ...ExpireSnapshotsOpt) error { + var ( + cfg expireSnapshotsCfg + updates []Update + snapsToKeep = make(map[int64]struct{}) + refsToDelete = make(map[string]struct{}) + ) + + for _, opt := range opts { + opt(&cfg) + } + + for refName, ref := range t.meta.refs { + if refName == MainBranch { + continue + } + + snap, err := t.meta.SnapshotByID(ref.SnapshotID) + if err != nil { + return err + } + + maxRefAgeMs := internal.Coalesce(ref.MaxRefAgeMs, cfg.maxSnapshotAgeMs) + if maxRefAgeMs == nil { + return errors.New("cannot find a valid value for maxRefAgeMs") + } + + refAge := time.Now().UnixMilli() - snap.TimestampMs + if refAge > *maxRefAgeMs { + updates = append(updates, NewRemoveSnapshotRefUpdate(refName)) + refsToDelete[refName] = struct{}{} + } + } + + for refName, ref := range t.meta.refs { Review Comment: can we combine these loops and just put the continue after `refsToDelete[refName] = struct{}{}`? -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: issues-unsubscr...@iceberg.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@iceberg.apache.org For additional commands, e-mail: issues-h...@iceberg.apache.org