fix: fix inspect database error

core/rawdb/database.go

@@ -122,6 +122,10 @@ func (frdb *freezerdb) SetBlockStore(block ethdb.Database) {
 	frdb.blockStore = block
 }
 
+func (frdb *freezerdb) HasSeparateBlockStore() bool {
+	return frdb.blockStore != nil
+}
+
 // Freeze is a helper method used for external testing to trigger and block until
 // a freeze cycle completes, without having to sleep for a minute to trigger the
 // automatic background run.
@@ -219,6 +223,10 @@ func (db *nofreezedb) SetBlockStore(block ethdb.Database) {
 	db.blockStore = block
 }
 
+func (db *nofreezedb) HasSeparateBlockStore() bool {
+	return db.blockStore != nil
+}
+
 func (db *nofreezedb) BlockStoreReader() ethdb.Reader {
 	if db.blockStore != nil {
 		return db.blockStore
@@ -598,13 +606,14 @@ func InspectDatabase(db ethdb.Database, keyPrefix, keyStart []byte) error {
 	it := db.NewIterator(keyPrefix, keyStart)
 	defer it.Release()
 
-	var trieIter ethdb.Iterator
-	var blockIter ethdb.Iterator
+	var trieIter ethdb.Iterator  // traverse state data if multi-database has been enabled
+	var blockIter ethdb.Iterator // traverse block data if multi-database has been enabled
 	if db.StateStore() != nil {
 		trieIter = db.StateStore().NewIterator(keyPrefix, nil)
 		defer trieIter.Release()
 	}
-	if db.BlockStore() != db {
+
+	if db.HasSeparateBlockStore() {
 		blockIter = db.BlockStore().NewIterator(keyPrefix, nil)
 		defer blockIter.Release()
 	}

core/rawdb/table.go

@@ -43,6 +43,10 @@ func (t *table) SetBlockStore(block ethdb.Database) {
 	panic("not implement")
 }
 
+func (t *table) HasSeparateBlockStore() bool {
+	panic("not implement")
+}
+
 // NewTable returns a database object that prefixes all keys with a given string.
 func NewTable(db ethdb.Database, prefix string) ethdb.Database {
 	return &table{

ethdb/database.go

@@ -160,6 +160,7 @@ type StateStoreReader interface {
 type BlockStore interface {
 	BlockStore() Database
 	SetBlockStore(block Database)
+	HasSeparateBlockStore() bool
 }
 
 type BlockStoreReader interface {

ethdb/remotedb/remotedb.go

@@ -44,6 +44,10 @@ func (db *Database) BlockStore() ethdb.Database {
 	return db
 }
 
+func (db *Database) HasSeparateBlockStore() bool {
+	return false
+}
+
 func (db *Database) SetBlockStore(block ethdb.Database) {
 	panic("not supported")
 }