func mergeSegment(newDB, db *gumshoe.DB, segment *timestampSegment) error {
// NOTE(caleb): Have to do more nasty float conversion in this function. See NOTE(caleb) in migrate.go.
at := float64(segment.at.Unix())
rows := make([]gumshoe.UnpackedRow, 0, len(segment.Bytes)/db.RowSize)
for i := 0; i < len(segment.Bytes); i += db.RowSize {
row := gumshoe.RowBytes(segment.Bytes[i : i+db.RowSize])
unpacked := db.DeserializeRow(row)
unpacked.RowMap[db.TimestampColumn.Name] = at
for _, dim := range db.Schema.DimensionColumns {
if dim.String {
continue
}
value := unpacked.RowMap[dim.Name]
if value == nil {
continue
}
convertValueToFloat64(unpacked.RowMap, dim.Name)
}
for _, dim := range db.Schema.MetricColumns {
convertValueToFloat64(unpacked.RowMap, dim.Name)
}
rows = append(rows, unpacked)
}
return newDB.InsertUnpacked(rows)
}
func migrateSegment(newDB, oldDB *gumshoe.DB, segment *timestampSegment,
convert func(gumshoe.UnpackedRow)) error {
at := uint32(segment.at.Unix())
rows := make([]gumshoe.UnpackedRow, 0, len(segment.Bytes)/oldDB.RowSize)
for i := 0; i < len(segment.Bytes); i += oldDB.RowSize {
row := gumshoe.RowBytes(segment.Bytes[i : i+oldDB.RowSize])
unpacked := oldDB.DeserializeRow(row)
// Attach a timestamp
unpacked.RowMap[oldDB.TimestampColumn.Name] = at
convert(unpacked)
rows = append(rows, unpacked)
}
return newDB.InsertUnpacked(rows)
}