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Implemented usage of coverage index in non-interleaved LevelDB backend. Untested, yet!

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This commit is contained in:
Sascha L. Teichmann
2015-07-24 08:30:52 +02:00
parent d53cea250c
commit 29eeb5e301
1 changed files with 20 additions and 13 deletions
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33
cmd/mtredisalize/leveldb.go
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@@ -274,14 +274,19 @@ func (ldbs *LevelDBSession) AllKeys(hash []byte, done chan struct{}) (keys chan
return
}
func (ldbs *LevelDBSession) SpatialQuery(hash, first, second []byte, done chan struct{}) (chan Block, error) {
func (ldbs *LevelDBSession) SpatialQuery(
hash, first, second []byte,
done chan struct{}) (chan Block, error) {
if ldbs.backend.interleaved {
return ldbs.interleavedSpatialQuery(first, second, done)
}
return ldbs.plainSpatialQuery(first, second, done)
}
func (ldbs *LevelDBSession) plainSpatialQuery(first, second []byte, done chan struct{}) (blocks chan Block, err error) {
func (ldbs *LevelDBSession) plainSpatialQuery(
first, second []byte,
done chan struct{}) (blocks chan Block, err error) {
var (
firstKey int64
@@ -311,21 +316,20 @@ func (ldbs *LevelDBSession) plainSpatialQuery(first, second []byte, done chan st
it := ldbs.backend.db.NewIterator(ro)
defer it.Close()
a, b := common.Coord{X: c1.X}, common.Coord{X: c2.X}
var a, b common.Coord
var err error
for a.Z = c1.Z; a.Z <= c2.Z; a.Z++ {
b.Z = a.Z
for a.Y = c1.Y; a.Y <= c2.Y; a.Y++ {
for _, r := range ldbs.backend.coverage.Query(c1, c2) {
a.Z, b.Z = int16(r.Z), int16(r.Z)
a.X, b.X = int16(r.X1), int16(r.X2)
// log.Printf("y1 y2 x1 x2 z: %d %d, %d %d, %d\n", r.Y1, r.Y2, r.X1, r.X2, r.Z)
for a.Y = r.Y2; a.Y >= r.Y1; a.Y-- {
b.Y = a.Y
from, to := order(common.CoordToPlain(a), common.CoordToPlain(b))
from, to := common.CoordToPlain(a), common.CoordToPlain(b)
it.Seek(common.StringToBytes(from))
for ; it.Valid(); it.Next() {
var (
key = it.Key()
pos int64
)
key := it.Key()
var pos int64
if pos, err = common.DecodeStringFromBytes(key); err != nil {
log.Printf("decoding key failed: %s\n", err)
return
@@ -349,7 +353,10 @@ func (ldbs *LevelDBSession) plainSpatialQuery(first, second []byte, done chan st
return
}
func (ldbs *LevelDBSession) interleavedSpatialQuery(first, second []byte, done chan struct{}) (blocks chan Block, err error) {
func (ldbs *LevelDBSession) interleavedSpatialQuery(
first, second []byte,
done chan struct{}) (blocks chan Block, err error) {
var (
firstKey int64
secondKey int64