mirror of
https://github.com/featurebasedb/featurebase.git
synced 2026-08-28 10:54:59 +00:00
144 lines
3.5 KiB
Go
144 lines
3.5 KiB
Go
// Copyright 2022 Molecula Corp. (DBA FeatureBase).
|
|
// SPDX-License-Identifier: Apache-2.0
|
|
package ctl
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"io"
|
|
"os"
|
|
|
|
"github.com/featurebasedb/featurebase/v3/logger"
|
|
"github.com/featurebasedb/featurebase/v3/rbf"
|
|
"github.com/featurebasedb/featurebase/v3/txkey"
|
|
)
|
|
|
|
// RBFPagesCommand represents a command for printing a list of RBF page metadata.
|
|
type RBFPagesCommand struct {
|
|
// Filepath to the RBF database.
|
|
Path string
|
|
|
|
// Print the b-tree key with each row.
|
|
WithTree bool
|
|
|
|
// Standard input/output
|
|
stdout io.Writer
|
|
logDest logger.Logger
|
|
}
|
|
|
|
// NewRBFPagesCommand returns a new instance of RBFPagesCommand.
|
|
func NewRBFPagesCommand(logdest logger.Logger) *RBFPagesCommand {
|
|
return &RBFPagesCommand{
|
|
stdout: os.Stdout,
|
|
logDest: logdest,
|
|
}
|
|
}
|
|
|
|
// Run executes the export.
|
|
func (cmd *RBFPagesCommand) Run(ctx context.Context) error {
|
|
// Open database.
|
|
db := rbf.NewDB(cmd.Path, nil)
|
|
if err := db.Open(); err != nil {
|
|
return err
|
|
}
|
|
defer db.Close()
|
|
|
|
// Execute with a transaction.
|
|
tx, err := db.Begin(false)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer tx.Rollback()
|
|
|
|
// Iterate over each page and grab info.
|
|
infos, err := tx.PageInfos()
|
|
if err != nil {
|
|
fmt.Fprintln(cmd.stdout, "ERRORS:")
|
|
switch err := err.(type) {
|
|
case rbf.ErrorList:
|
|
for i := range err {
|
|
fmt.Fprintln(cmd.stdout, err[i])
|
|
}
|
|
default:
|
|
fmt.Fprintln(cmd.stdout, err)
|
|
}
|
|
fmt.Fprintln(cmd.stdout, "")
|
|
}
|
|
|
|
// Write header.
|
|
fmt.Fprint(cmd.stdout, "ID ")
|
|
fmt.Fprint(cmd.stdout, "TYPE ")
|
|
if cmd.WithTree {
|
|
fmt.Fprint(cmd.stdout, "TREE ")
|
|
}
|
|
fmt.Fprintln(cmd.stdout, "EXTRA")
|
|
|
|
fmt.Fprint(cmd.stdout, "======== ")
|
|
fmt.Fprint(cmd.stdout, "========== ")
|
|
if cmd.WithTree {
|
|
fmt.Fprint(cmd.stdout, "============================== ")
|
|
}
|
|
fmt.Fprintln(cmd.stdout, "====================")
|
|
|
|
// Print one line for each page.
|
|
for pgno, info := range infos {
|
|
fmt.Fprintf(cmd.stdout, "%-8d ", pgno)
|
|
switch info := info.(type) {
|
|
case *rbf.MetaPageInfo:
|
|
fmt.Fprintf(cmd.stdout, "%-10s ", "meta")
|
|
if cmd.WithTree {
|
|
fmt.Fprintf(cmd.stdout, "%-30q ", "")
|
|
}
|
|
fmt.Fprintf(cmd.stdout, "pageN=%d,walid=%d,rootrec=%d,freelist=%d\n", info.PageN, info.WALID, info.RootRecordPageNo, info.FreelistPageNo)
|
|
|
|
case *rbf.RootRecordPageInfo:
|
|
fmt.Fprintf(cmd.stdout, "%-10s ", "rootrec")
|
|
if cmd.WithTree {
|
|
fmt.Fprintf(cmd.stdout, "%-30q ", "")
|
|
}
|
|
fmt.Fprintf(cmd.stdout, "next=%d\n", info.Next)
|
|
|
|
case *rbf.LeafPageInfo:
|
|
fmt.Fprintf(cmd.stdout, "%-10s ", "leaf")
|
|
if cmd.WithTree {
|
|
fmt.Fprintf(cmd.stdout, "%-30q ", prefixToString(info.Tree))
|
|
}
|
|
fmt.Fprintf(cmd.stdout, "flags=x%x,celln=%d\n", info.Flags, info.CellN)
|
|
|
|
case *rbf.BranchPageInfo:
|
|
fmt.Fprintf(cmd.stdout, "%-10s ", "branch")
|
|
if cmd.WithTree {
|
|
fmt.Fprintf(cmd.stdout, "%-30q ", prefixToString(info.Tree))
|
|
}
|
|
fmt.Fprintf(cmd.stdout, "flags=x%x,celln=%d\n", info.Flags, info.CellN)
|
|
|
|
case *rbf.BitmapPageInfo:
|
|
fmt.Fprintf(cmd.stdout, "%-10s ", "bitmap")
|
|
if cmd.WithTree {
|
|
fmt.Fprintf(cmd.stdout, "%-30q ", prefixToString(info.Tree))
|
|
}
|
|
fmt.Fprintf(cmd.stdout, "-\n")
|
|
|
|
case *rbf.FreePageInfo:
|
|
fmt.Fprintf(cmd.stdout, "%-10s ", "free")
|
|
if cmd.WithTree {
|
|
fmt.Fprintf(cmd.stdout, "%-30q ", "")
|
|
}
|
|
fmt.Fprintf(cmd.stdout, "-\n")
|
|
|
|
default:
|
|
fmt.Fprintf(cmd.stdout, "unknown [%T]\n", info)
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func prefixToString(s string) (ret string) {
|
|
defer func() {
|
|
if err := recover(); err != nil {
|
|
ret = s
|
|
}
|
|
}()
|
|
return txkey.PrefixToString([]byte(s))
|
|
}
|