809eb14ac2
Change-Id: I39356d8bc7305b4a8ea0c1fb5603010ad72a68b9
321 lines
8.1 KiB
Go
321 lines
8.1 KiB
Go
// Copyright (C) 2020 Storj Labs, Inc.
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// See LICENSE for copying information.
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package metabase
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import (
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"context"
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"database/sql"
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"errors"
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"github.com/zeebo/errs"
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"storj.io/common/storj"
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"storj.io/storj/private/tagsql"
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)
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// DeleteObjectExactVersion contains arguments necessary for deleting an exact version of object.
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type DeleteObjectExactVersion struct {
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Version Version
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ObjectLocation
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}
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// Verify delete object fields.
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func (obj *DeleteObjectExactVersion) Verify() error {
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if err := obj.ObjectLocation.Verify(); err != nil {
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return err
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}
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if obj.Version <= 0 {
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return ErrInvalidRequest.New("Version invalid: %v", obj.Version)
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}
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return nil
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}
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// DeleteObjectResult result of deleting object.
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type DeleteObjectResult struct {
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Segments []DeletedSegmentInfo
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}
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// DeletedSegmentInfo info about deleted segment.
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type DeletedSegmentInfo struct {
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// TODO figure out which part of object are needed to delete from SN
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RootPieceID storj.PieceID
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Pieces Pieces
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}
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// DeleteObjectAllVersions contains arguments necessary for deleting all object versions.
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type DeleteObjectAllVersions struct {
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ObjectLocation
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}
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// DeleteObjectLatestVersion contains arguments necessary for deleting latest object version.
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type DeleteObjectLatestVersion struct {
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ObjectLocation
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}
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// DeleteObjectExactVersion deletes an exact object version.
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func (db *DB) DeleteObjectExactVersion(ctx context.Context, opts DeleteObjectExactVersion) (result DeleteObjectResult, err error) {
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defer mon.Task()(&ctx)(&err)
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if err := opts.Verify(); err != nil {
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return DeleteObjectResult{}, err
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}
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tx, err := db.db.BeginTx(ctx, nil)
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if err != nil {
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return DeleteObjectResult{}, Error.New("failed BeginTx: %w", err)
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}
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committed := false
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defer func() {
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if !committed {
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err = errs.Combine(err, Error.Wrap(tx.Rollback()))
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}
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}()
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rows, err := tx.Query(ctx, `
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DELETE FROM objects
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WHERE
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project_id = $1 AND
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bucket_name = $2 AND
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object_key = $3 AND
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version = $4 AND
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status = 1
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RETURNING stream_id;
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`, opts.ProjectID, opts.BucketName, []byte(opts.ObjectKey), opts.Version)
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if err != nil {
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if errors.Is(err, sql.ErrNoRows) {
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return DeleteObjectResult{}, Error.New("object missing")
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}
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return DeleteObjectResult{}, Error.New("unable to delete object: %w", err)
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}
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ids, err := scanObjectDeletion(rows)
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if err != nil {
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return DeleteObjectResult{}, err
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}
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if len(ids) == 0 {
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return DeleteObjectResult{}, Error.New("object missing")
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}
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segmentInfos, err := deleteSegments(ctx, tx, ids)
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if err != nil {
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return DeleteObjectResult{}, err
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}
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if len(segmentInfos) != 0 {
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result.Segments = segmentInfos
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}
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err, committed = tx.Commit(), true
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if err != nil {
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return DeleteObjectResult{}, Error.New("unable to commit tx: %w", err)
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}
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return result, nil
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}
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// DeleteObjectLatestVersion deletes latest object version.
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func (db *DB) DeleteObjectLatestVersion(ctx context.Context, opts DeleteObjectLatestVersion) (result DeleteObjectResult, err error) {
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defer mon.Task()(&ctx)(&err)
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if err := opts.Verify(); err != nil {
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return DeleteObjectResult{}, err
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}
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tx, err := db.db.BeginTx(ctx, nil)
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if err != nil {
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return DeleteObjectResult{}, Error.New("failed BeginTx: %w", err)
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}
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committed := false
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defer func() {
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if !committed {
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err = errs.Combine(err, Error.Wrap(tx.Rollback()))
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}
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}()
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// TODO different sql for Postgres and CockroachDB
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// version ONLY for cockroachdb
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// Postgres doesn't support ORDER BY and LIMIT in DELETE
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// rows, err = tx.Query(ctx, `
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// DELETE FROM objects
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// WHERE
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// project_id = $1 AND
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// bucket_name = $2 AND
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// object_key = $3 AND
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// status = 1
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// ORDER BY version DESC
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// LIMIT 1
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// RETURNING stream_id;
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// `, opts.ProjectID, opts.BucketName, opts.ObjectKey)
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// version for Postgres and Cockroachdb (but slow for Cockroachdb)
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rows, err := tx.Query(ctx, `
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DELETE FROM objects
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WHERE
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project_id = $1 AND
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bucket_name = $2 AND
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object_key = $3 AND
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version = (SELECT version FROM objects WHERE
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project_id = $1 AND
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bucket_name = $2 AND
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object_key = $3 AND
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status = 1
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ORDER BY version DESC LIMIT 1
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) AND
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status = 1
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RETURNING stream_id;
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`, opts.ProjectID, opts.BucketName, []byte(opts.ObjectKey))
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if err != nil {
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if errors.Is(err, sql.ErrNoRows) {
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return DeleteObjectResult{}, Error.New("object missing")
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}
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return DeleteObjectResult{}, Error.New("unable to delete object: %w", err)
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}
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ids, err := scanObjectDeletion(rows)
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if err != nil {
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return DeleteObjectResult{}, err
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}
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if len(ids) == 0 {
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return DeleteObjectResult{}, Error.New("object missing")
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}
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segmentInfos, err := deleteSegments(ctx, tx, ids)
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if err != nil {
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return DeleteObjectResult{}, err
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}
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if len(segmentInfos) != 0 {
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result.Segments = segmentInfos
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}
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err, committed = tx.Commit(), true
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if err != nil {
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return DeleteObjectResult{}, Error.New("unable to commit tx: %w", err)
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}
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return result, nil
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}
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// DeleteObjectAllVersions deletes all object versions.
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func (db *DB) DeleteObjectAllVersions(ctx context.Context, opts DeleteObjectAllVersions) (result DeleteObjectResult, err error) {
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defer mon.Task()(&ctx)(&err)
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if err := opts.Verify(); err != nil {
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return DeleteObjectResult{}, err
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}
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tx, err := db.db.BeginTx(ctx, nil)
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if err != nil {
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return DeleteObjectResult{}, Error.New("failed BeginTx: %w", err)
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}
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committed := false
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defer func() {
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if !committed {
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err = errs.Combine(err, Error.Wrap(tx.Rollback()))
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}
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}()
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rows, err := tx.Query(ctx, `
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DELETE FROM objects
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WHERE
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project_id = $1 AND
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bucket_name = $2 AND
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object_key = $3 AND
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status = 1
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RETURNING stream_id;
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`, opts.ProjectID, opts.BucketName, []byte(opts.ObjectKey))
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if err != nil {
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if errors.Is(err, sql.ErrNoRows) {
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return DeleteObjectResult{}, Error.New("object missing")
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}
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return DeleteObjectResult{}, Error.New("unable to delete object: %w", err)
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}
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ids, err := scanObjectDeletion(rows)
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if err != nil {
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return DeleteObjectResult{}, err
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}
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if len(ids) == 0 {
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return DeleteObjectResult{}, Error.New("object missing")
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}
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segmentInfos, err := deleteSegments(ctx, tx, ids)
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if err != nil {
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return DeleteObjectResult{}, err
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}
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if len(segmentInfos) != 0 {
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result.Segments = segmentInfos
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}
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err, committed = tx.Commit(), true
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if err != nil {
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return DeleteObjectResult{}, Error.New("unable to commit tx: %w", err)
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}
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return result, nil
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}
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func scanObjectDeletion(rows tagsql.Rows) (segmentIds []interface{}, err error) {
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defer func() { err = errs.Combine(err, rows.Close()) }()
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ids := make([]interface{}, 0, 10)
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for rows.Next() {
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var streamID []byte
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err = rows.Scan(&streamID)
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if err != nil {
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return []interface{}{}, Error.New("unable to delete object: %w", err)
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}
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ids = append(ids, streamID)
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}
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if err := rows.Err(); err != nil {
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return []interface{}{}, Error.New("unable to delete object: %w", err)
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}
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return ids, nil
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}
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func deleteSegments(ctx context.Context, tx tagsql.Tx, segmentIds []interface{}) (_ []DeletedSegmentInfo, err error) {
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defer mon.Task()(&ctx)(&err)
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// TODO we need to figure out how integrate this with piece deletion code
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// one issue is that with this approach we need to return all pieces SN ids at once
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infos := make([]DeletedSegmentInfo, 0, len(segmentIds))
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for _, id := range segmentIds {
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segmentsRows, err := tx.Query(ctx, `
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DELETE FROM segments
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WHERE stream_id = $1
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RETURNING root_piece_id, remote_pieces;
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`, id)
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if err != nil {
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return []DeletedSegmentInfo{}, Error.New("unable to delete object: %w", err)
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}
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for segmentsRows.Next() {
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var segmentInfo DeletedSegmentInfo
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err = segmentsRows.Scan(&segmentInfo.RootPieceID, &segmentInfo.Pieces)
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if err != nil {
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return []DeletedSegmentInfo{}, errs.Combine(Error.New("unable to delete object: %w", err), segmentsRows.Close())
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}
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if len(segmentInfo.Pieces) != 0 {
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infos = append(infos, segmentInfo)
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}
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}
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if err := segmentsRows.Err(); err != nil {
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return []DeletedSegmentInfo{}, Error.New("unable to delete object: %w", err)
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}
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if err := segmentsRows.Close(); err != nil {
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return []DeletedSegmentInfo{}, Error.New("unable to delete object: %w", err)
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}
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}
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return infos, nil
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}
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