mirror of
https://github.com/featurebasedb/featurebase.git
synced 2026-09-15 16:51:03 +00:00
cf97a0dcb8
We switch everything to use QueryContext/QueryRead/etc instead of Qcx/Tx. We drop the short_txkey subpackage (it's now handled by either keys or querycontext). We drop all the dbshard stuff, and all the tx/txfactory stuff. We remove all the things that related to the old "Block" concept, which was mostly used by the anti-entropy code, but had one fragmentary usage left in the ImportRoaringOverwrite case of ImportRoaring. That's replaced by using a rewriter that deletes all bits (not just bits in specific columns) from an existing thing, but writes in new bits. Actually we could probably do that better with a custom "eradicate-rewriter" that doesn't try to be clever, and just eliminates things. This includes a number of minor bug fixes that were exposed by getting the testing to work. For example: * When checking whether an operation "requires write", we now consider a Delete a kind of a Write, because it is. * Several tests were relying on the fact that writes through Qcx were being committed whether or not the Qcx was ever told to finish. With QueryContext, you actually have to reach a Commit() or the writes don't happen (except for special cases in Delete). * Replaced a lot of panics with t.Fatalf in tests. There's also some minor staticcheck fixes, like deleting the unused "db" member of a boltdb transaction wrapper.
133 lines
3.3 KiB
Go
133 lines
3.3 KiB
Go
// Copyright 2021 Molecula Corp. All rights reserved.
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package ctl
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import (
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"context"
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"fmt"
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"io"
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"os"
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"github.com/molecula/featurebase/v3/logger"
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"github.com/molecula/featurebase/v3/rbf"
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)
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// RBFPagesCommand represents a command for printing a list of RBF page metadata.
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type RBFPagesCommand struct {
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// Filepath to the RBF database.
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Path string
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// Print the b-tree key with each row.
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WithTree bool
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// Standard input/output
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stdout io.Writer
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logDest logger.Logger
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}
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// NewRBFPagesCommand returns a new instance of RBFPagesCommand.
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func NewRBFPagesCommand(logdest logger.Logger) *RBFPagesCommand {
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return &RBFPagesCommand{
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stdout: os.Stdout,
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logDest: logdest,
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}
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}
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// Run executes the export.
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func (cmd *RBFPagesCommand) Run(ctx context.Context) error {
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// Open database.
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db := rbf.NewDB(cmd.Path, nil)
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if err := db.Open(); err != nil {
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return err
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}
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defer db.Close()
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// Execute with a transaction.
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tx, err := db.Begin(false)
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if err != nil {
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return err
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}
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defer tx.Rollback()
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// Iterate over each page and grab info.
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infos, err := tx.PageInfos()
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if err != nil {
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fmt.Fprintln(cmd.stdout, "ERRORS:")
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switch err := err.(type) {
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case rbf.ErrorList:
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for i := range err {
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fmt.Fprintln(cmd.stdout, err[i])
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}
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default:
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fmt.Fprintln(cmd.stdout, err)
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}
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fmt.Fprintln(cmd.stdout, "")
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}
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// Write header.
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fmt.Fprint(cmd.stdout, "ID ")
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fmt.Fprint(cmd.stdout, "TYPE ")
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if cmd.WithTree {
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fmt.Fprint(cmd.stdout, "TREE ")
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}
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fmt.Fprintln(cmd.stdout, "EXTRA")
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fmt.Fprint(cmd.stdout, "======== ")
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fmt.Fprint(cmd.stdout, "========== ")
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if cmd.WithTree {
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fmt.Fprint(cmd.stdout, "============================== ")
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}
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fmt.Fprintln(cmd.stdout, "====================")
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// Print one line for each page.
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for pgno, info := range infos {
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fmt.Fprintf(cmd.stdout, "%-8d ", pgno)
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switch info := info.(type) {
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case *rbf.MetaPageInfo:
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fmt.Fprintf(cmd.stdout, "%-10s ", "meta")
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if cmd.WithTree {
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fmt.Fprintf(cmd.stdout, "%-30q ", "")
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}
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fmt.Fprintf(cmd.stdout, "pageN=%d,walid=%d,rootrec=%d,freelist=%d\n", info.PageN, info.WALID, info.RootRecordPageNo, info.FreelistPageNo)
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case *rbf.RootRecordPageInfo:
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fmt.Fprintf(cmd.stdout, "%-10s ", "rootrec")
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if cmd.WithTree {
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fmt.Fprintf(cmd.stdout, "%-30q ", "")
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}
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fmt.Fprintf(cmd.stdout, "next=%d\n", info.Next)
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case *rbf.LeafPageInfo:
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fmt.Fprintf(cmd.stdout, "%-10s ", "leaf")
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if cmd.WithTree {
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fmt.Fprintf(cmd.stdout, "%-30q ", rbf.PrefixToString(info.Tree))
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}
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fmt.Fprintf(cmd.stdout, "flags=x%x,celln=%d\n", info.Flags, info.CellN)
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case *rbf.BranchPageInfo:
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fmt.Fprintf(cmd.stdout, "%-10s ", "branch")
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if cmd.WithTree {
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fmt.Fprintf(cmd.stdout, "%-30q ", rbf.PrefixToString(info.Tree))
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}
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fmt.Fprintf(cmd.stdout, "flags=x%x,celln=%d\n", info.Flags, info.CellN)
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case *rbf.BitmapPageInfo:
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fmt.Fprintf(cmd.stdout, "%-10s ", "bitmap")
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if cmd.WithTree {
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fmt.Fprintf(cmd.stdout, "%-30q ", rbf.PrefixToString(info.Tree))
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}
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fmt.Fprintf(cmd.stdout, "-\n")
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case *rbf.FreePageInfo:
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fmt.Fprintf(cmd.stdout, "%-10s ", "free")
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if cmd.WithTree {
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fmt.Fprintf(cmd.stdout, "%-30q ", "")
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}
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fmt.Fprintf(cmd.stdout, "-\n")
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default:
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fmt.Fprintf(cmd.stdout, "unknown [%T]\n", info)
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}
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}
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return nil
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}
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