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ensure that changing ShardWidth is supported in rowsForColumn()

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This commit is contained in:
Travis Turner 2018-07-17 15:56:48 -05:00
parent 07abb505cc
commit dc5d7a66ef
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1 changed files with 9 additions and 2 deletions
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11
fragment.go
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@ -47,6 +47,13 @@ const (
// ShardWidth is the number of column IDs in a shard.
ShardWidth = 1048576
// containersPerRowSegment is dependent upon ShardWidth,
// and it represents the number of containers per shard row
// (or rowSegment). Since containers are set in roaring
// to be 2^16, then this const should be ShardWidth / 2^16.
// It is represented as the exponent n of 2^n.
containersPerRowSegment = 4
// snapshotExt is the file extension used for an in-process snapshot.
snapshotExt = ".snapshotting"
@ -1691,7 +1698,7 @@ func (f *fragment) rows() []uint64 {
key, _ := i.Value()
// virtual row for the current container
vRow := key >> 4
vRow := key >> containersPerRowSegment
// skip dups
if vRow == lastRow {
@ -1719,7 +1726,7 @@ func (f *fragment) rowsForColumn(columnID uint64) []uint64 {
key, c := i.Value()
// virtual row for the current container
vRow := key >> 4
vRow := key >> containersPerRowSegment
// column container key for virtual row
colKey = ((vRow * ShardWidth) + colID) >> 16