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keys.go
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/
keys.go
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package main
import (
"errors"
"flag"
"fmt"
"github.com/gochain-io/gochain/ethdb"
)
type KeysCommand struct{}
func NewKeysCommand() *KeysCommand {
return &KeysCommand{}
}
func (cmd *KeysCommand) Run(args []string) error {
fs := flag.NewFlagSet("gochain-ethdb-keys", flag.ContinueOnError)
tableName := fs.String("table", "", "table name")
if err := fs.Parse(args); err != nil {
return err
} else if fs.NArg() == 0 {
return errors.New("path required")
} else if *tableName == "" {
return errors.New("table name required")
}
// Open db.
db := ethdb.NewDB(fs.Arg(0))
db.MinCompactionAge = 0
if err := db.Open(); err != nil {
return err
}
defer db.Close()
// Open table.
tbl := db.Table(*tableName)
if tbl == nil {
return fmt.Errorf("unknown table name: %q", *tableName)
}
// Iterate over all segments
segments := tbl.SegmentSlice()
for _, segment := range segments {
itr := segment.Iterator()
for itr.Next() {
fmt.Printf("%x\t%d\n", itr.Key(), len(itr.Value()))
}
itr.Close()
}
return nil
}