本文整理汇总了Golang中github.com/blevesearch/bleve/index/store.KVReader.PrefixIterator方法的典型用法代码示例。如果您正苦于以下问题：Golang KVReader.PrefixIterator方法的具体用法？Golang KVReader.PrefixIterator怎么用？Golang KVReader.PrefixIterator使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类github.com/blevesearch/bleve/index/store.KVReader的用法示例。
在下文中一共展示了KVReader.PrefixIterator方法的6个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Golang代码示例。
示例1: countDocs
func (udc *SmolderingCouch) countDocs(kvreader store.KVReader) (count, highDocNum uint64, err error) {
k := TermFrequencyRowStartField(0)
it := kvreader.PrefixIterator(k)
defer func() {
if cerr := it.Close(); err == nil && cerr != nil {
err = cerr
}
}()
var lastValidDocNum []byte
k, _, valid := it.Current()
for valid {
tfr, err := NewTermFrequencyRowK(k)
if err != nil {
return 0, 0, err
}
if tfr.term != nil {
udc.cf.Insert(tfr.term)
}
lastValidDocNum = lastValidDocNum[:0]
lastValidDocNum = append(lastValidDocNum, tfr.docNumber...)
count++
it.Next()
k, _, valid = it.Current()
}
if lastValidDocNum != nil {
_, highDocNum, err = DecodeUvarintAscending(lastValidDocNum)
if err != nil {
return 0, 0, err
}
}
return
}示例2: dumpPrefix
func dumpPrefix(kvreader store.KVReader, rv chan interface{}, prefix []byte) {
start := prefix
if start == nil {
start = []byte{0}
}
it := kvreader.PrefixIterator(start)
defer func() {
cerr := it.Close()
if cerr != nil {
rv <- cerr
}
}()
key, val, valid := it.Current()
for valid {
ck := make([]byte, len(key))
copy(ck, key)
cv := make([]byte, len(val))
copy(cv, val)
row, err := ParseFromKeyValue(ck, cv)
if err != nil {
rv <- err
return
}
rv <- row
it.Next()
key, val, valid = it.Current()
}
}示例3: visitPrefix
func visitPrefix(reader store.KVReader, prefix []byte, visitor KVVisitor) (err error) {
start := prefix
if start == nil {
start = []byte{}
}
it := reader.PrefixIterator(start)
defer func() {
if cerr := it.Close(); err == nil && cerr != nil {
err = cerr
}
}()
k, v, valid := it.Current()
for valid {
var cont bool
cont, err = visitor(k, v)
if err != nil {
// visitor encountered an error, stop and return it
return
}
if !cont {
// vistor has requested we stop iteration, return nil
return
}
it.Next()
k, v, valid = it.Current()
}
return
}示例4: dumpPrefix
func (udc *UpsideDownCouch) dumpPrefix(kvreader store.KVReader, rv chan interface{}, prefix []byte) {
start := prefix
if start == nil {
start = []byte{0}
}
it := kvreader.PrefixIterator(start)
defer func() {
cerr := it.Close()
if cerr != nil {
rv <- cerr
}
}()
key, val, valid := it.Current()
for valid {
row, err := ParseFromKeyValue(key, val)
if err != nil {
rv <- err
return
}
rv <- row
it.Next()
key, val, valid = it.Current()
}
}示例5: countDocs
func (udc *UpsideDownCouch) countDocs(kvreader store.KVReader) (count uint64, err error) {
it := kvreader.PrefixIterator([]byte{'b'})
defer func() {
if cerr := it.Close(); err == nil && cerr != nil {
err = cerr
}
}()
_, _, valid := it.Current()
for valid {
count++
it.Next()
_, _, valid = it.Current()
}
return
}示例6: loadSchema
func (udc *SmolderingCouch) loadSchema(kvreader store.KVReader) (err error) {
it := kvreader.PrefixIterator([]byte{'f'})
defer func() {
if cerr := it.Close(); err == nil && cerr != nil {
err = cerr
}
}()
key, val, valid := it.Current()
for valid {
var fieldRow *FieldRow
fieldRow, err = NewFieldRowKV(key, val)
if err != nil {
return
}
udc.fieldCache.AddExisting(fieldRow.name, fieldRow.index)
it.Next()
key, val, valid = it.Current()
}
val, err = kvreader.Get([]byte{'v'})
if err != nil {
return
}
var vr *VersionRow
vr, err = NewVersionRowKV([]byte{'v'}, val)
if err != nil {
return
}
if vr.version != Version {
err = IncompatibleVersion
return
}
return
}