gaspersic/go-ethereum
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

all: simplify and fix database iteration with prefix/start (#20808)

Browse Source 
* core/state/snapshot: start fixing disk iterator seek

* ethdb, rawdb, leveldb, memorydb: implement iterators with prefix and start

* les, core/state/snapshot: iterator fixes

* all: remove two iterator methods

* all: rename Iteratee.NewIteratorWith -> NewIterator

* ethdb: fix review concerns
This commit is contained in:
Martin Holst Swende
2020-04-15 13:08:53 +02:00
committed by GitHub
parent 00064ddcfb
commit 6402c42b67
24 changed files with 248 additions and 187 deletions
Download Patch File Download Diff File Expand all files Collapse all files

27
core/rawdb/table.go
View File

@ -103,27 +103,12 @@ func (t *table) Delete(key []byte) error {
return t.db.Delete(append([]byte(t.prefix), key...))
}
// NewIterator creates a binary-alphabetical iterator over the entire keyspace
// contained within the database.
func (t *table) NewIterator() ethdb.Iterator {
return t.NewIteratorWithPrefix(nil)
}
// NewIteratorWithStart creates a binary-alphabetical iterator over a subset of
// database content starting at a particular initial key (or after, if it does
// not exist).
func (t *table) NewIteratorWithStart(start []byte) ethdb.Iterator {
iter := t.db.NewIteratorWithStart(append([]byte(t.prefix), start...))
return &tableIterator{
iter: iter,
prefix: t.prefix,
}
}
// NewIteratorWithPrefix creates a binary-alphabetical iterator over a subset
// of database content with a particular key prefix.
func (t *table) NewIteratorWithPrefix(prefix []byte) ethdb.Iterator {
iter := t.db.NewIteratorWithPrefix(append([]byte(t.prefix), prefix...))
// NewIterator creates a binary-alphabetical iterator over a subset
// of database content with a particular key prefix, starting at a particular
// initial key (or after, if it does not exist).
func (t *table) NewIterator(prefix []byte, start []byte) ethdb.Iterator {
innerPrefix := append([]byte(t.prefix), prefix...)
iter := t.db.NewIterator(innerPrefix, start)
return &tableIterator{
iter: iter,
prefix: t.prefix,