func doRead(ctx context.Context, args ...string) { if len(args) < 1 { log.Fatalf("usage: cbt read <table> [args ...]") } tbl := getClient().Open(args[0]) parsed := make(map[string]string) for _, arg := range args[1:] { i := strings.Index(arg, "=") if i < 0 { log.Fatalf("Bad arg %q", arg) } key, val := arg[:i], arg[i+1:] switch key { default: log.Fatalf("Unknown arg key %q", key) case "limit": // Be nicer; we used to support this, but renamed it to "end". log.Fatalf("Unknown arg key %q; did you mean %q?", key, "end") case "start", "end", "prefix", "count": parsed[key] = val } } if (parsed["start"] != "" || parsed["end"] != "") && parsed["prefix"] != "" { log.Fatal(`"start"/"end" may not be mixed with "prefix"`) } var rr bigtable.RowRange if start, end := parsed["start"], parsed["end"]; end != "" { rr = bigtable.NewRange(start, end) } else if start != "" { rr = bigtable.InfiniteRange(start) } if prefix := parsed["prefix"]; prefix != "" { rr = bigtable.PrefixRange(prefix) } var opts []bigtable.ReadOption if count := parsed["count"]; count != "" { n, err := strconv.ParseInt(count, 0, 64) if err != nil { log.Fatalf("Bad count %q: %v", count, err) } opts = append(opts, bigtable.LimitRows(n)) } // TODO(dsymonds): Support filters. err := tbl.ReadRows(ctx, rr, func(r bigtable.Row) bool { printRow(r) return true }, opts...) if err != nil { log.Fatalf("Reading rows: %v", err) } }
func doRead(ctx context.Context, args ...string) { if len(args) < 1 { log.Fatalf("usage: cbt read <table> [args ...]") } tbl := getClient().Open(args[0]) parsed := make(map[string]string) for _, arg := range args[1:] { i := strings.Index(arg, "=") if i < 0 { log.Fatalf("Bad arg %q", arg) } key, val := arg[:i], arg[i+1:] switch key { default: log.Fatalf("Unknown arg key %q", key) case "start", "limit", "prefix": parsed[key] = val } } if (parsed["start"] != "" || parsed["limit"] != "") && parsed["prefix"] != "" { log.Fatal(`"start"/"limit" may not be mixed with "prefix"`) } var rr bigtable.RowRange if start, limit := parsed["start"], parsed["limit"]; limit != "" { rr = bigtable.NewRange(start, limit) } else if start != "" { rr = bigtable.InfiniteRange(start) } if prefix := parsed["prefix"]; prefix != "" { rr = bigtable.PrefixRange(prefix) } // TODO(dsymonds): Support filters. err := tbl.ReadRows(ctx, rr, func(r bigtable.Row) bool { printRow(r) return true }) if err != nil { log.Fatalf("Reading rows: %v", err) } }