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Add experimental Postgres migration
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2 changed files with 146 additions and 0 deletions
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@ -24,6 +24,7 @@ import (
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func LoadFromGoose() {
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goose.AddMigration(UpAddForgottenColumn, DownAddForgottenColumn)
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goose.AddMigration(UpStateBlocksRefactor, DownStateBlocksRefactor)
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}
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func LoadAddForgottenColumn(m *sqlutil.Migrations) {
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@ -0,0 +1,145 @@
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// Copyright 2020 The Matrix.org Foundation C.I.C.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package deltas
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import (
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"context"
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"database/sql"
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"fmt"
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"github.com/matrix-org/dendrite/internal"
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"github.com/matrix-org/dendrite/internal/sqlutil"
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"github.com/matrix-org/dendrite/roomserver/types"
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"github.com/matrix-org/util"
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)
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func LoadStateBlocksRefactor(m *sqlutil.Migrations) {
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m.AddMigration(UpStateBlocksRefactor, DownStateBlocksRefactor)
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}
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func UpStateBlocksRefactor(tx *sql.Tx) error {
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if _, err := tx.Exec(`ALTER TABLE roomserver_state_block RENAME TO _roomserver_state_block;`); err != nil {
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return fmt.Errorf("tx.Exec: %w", err)
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}
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if _, err := tx.Exec(`ALTER TABLE roomserver_state_snapshots RENAME TO _roomserver_state_snapshots;`); err != nil {
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return fmt.Errorf("tx.Exec: %w", err)
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}
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_, err := tx.Exec(`
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CREATE TABLE IF NOT EXISTS roomserver_state_block (
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-- Local numeric ID for this state data.
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state_block_nid bigserial PRIMARY KEY,
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event_nids bigint[] NOT NULL,
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UNIQUE (event_nids)
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);
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`)
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if err != nil {
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return fmt.Errorf("tx.Exec: %w", err)
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}
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_, err = tx.Exec(`
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CREATE SEQUENCE IF NOT EXISTS roomserver_state_snapshot_nid_seq;
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CREATE TABLE IF NOT EXISTS roomserver_state_snapshots (
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state_snapshot_nid bigint PRIMARY KEY DEFAULT nextval('roomserver_state_snapshot_nid_seq'),
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room_nid bigint NOT NULL,
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state_block_nids bigint[] NOT NULL,
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UNIQUE (room_nid, state_block_nids)
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);
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`)
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if err != nil {
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return fmt.Errorf("tx.Exec: %w", err)
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}
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snapshotrows, err := tx.Query(`SELECT state_snapshot_nid, room_nid, state_block_nids FROM _roomserver_state_snapshots;`)
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if err != nil {
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return fmt.Errorf("tx.Query: %w", err)
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}
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defer internal.CloseAndLogIfError(context.TODO(), snapshotrows, "rows.close() failed")
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for snapshotrows.Next() {
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var snapshot types.StateSnapshotNID
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var room types.RoomNID
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var blocks []types.StateBlockNID
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if err = snapshotrows.Scan(&snapshot, &room, &blocks); err != nil {
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return fmt.Errorf("rows.Scan: %w", err)
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}
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var newblocks []types.StateBlockNID
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for _, block := range blocks {
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if err = func() error {
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blockrows, berr := tx.Query(`SELECT event_nid FROM _roomserver_state_block WHERE state_block_nid = $1`, block)
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if berr != nil {
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return fmt.Errorf("tx.Query (event nids from old block): %w", berr)
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}
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defer internal.CloseAndLogIfError(context.TODO(), blockrows, "rows.close() failed")
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events := types.EventNIDs{}
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for blockrows.Next() {
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var event types.EventNID
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if err = blockrows.Scan(&event); err != nil {
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return fmt.Errorf("rows.Scan: %w", err)
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}
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events = append(events, event)
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}
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events = events[:util.SortAndUnique(events)]
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var blocknid types.StateBlockNID
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err = tx.QueryRow(`
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INSERT INTO roomserver_state_block (event_nids)
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VALUES ($1)
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ON CONFLICT (event_nids) DO UPDATE SET event_nids=$1
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RETURNING state_block_nid
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`, events).Scan(&blocknid)
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if err != nil {
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return fmt.Errorf("tx.QueryRow.Scan (insert new block): %w", err)
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}
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newblocks = append(newblocks, blocknid)
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return nil
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}(); err != nil {
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return err
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}
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var newsnapshot types.StateSnapshotNID
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err = tx.QueryRow(`
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INSERT INTO roomserver_state_snapshots (room_nid, state_block_nids)
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VALUES ($1, $2)
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ON CONFLICT (room_nid, state_block_nids) DO UPDATE SET room_nid=$3
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RETURNING state_snapshot_nid
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`, room, newblocks, room).Scan(&newsnapshot)
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if err != nil {
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return fmt.Errorf("tx.QueryRow.Scan (insert new snapshot): %w", err)
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}
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_, err = tx.Exec(`UPDATE roomserver_events SET state_snapshot_nid=$1 WHERE state_snapshot_nid=$2`, newsnapshot, snapshot)
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if err != nil {
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return fmt.Errorf("tx.Exec (update events): %w", err)
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}
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_, err = tx.Exec(`UPDATE roomserver_rooms SET state_snapshot_nid=$1 WHERE state_snapshot_nid=$2`, newsnapshot, snapshot)
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if err != nil {
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return fmt.Errorf("tx.Exec (update rooms): %w", err)
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}
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fmt.Println("Rewrote snapshot", snapshot, "to", newsnapshot)
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}
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}
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if _, err = tx.Exec(`DROP TABLE _roomserver_state_snapshots;`); err != nil {
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return fmt.Errorf("tx.Exec (delete old snapshot table): %w", err)
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}
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if _, err = tx.Exec(`DROP TABLE _roomserver_state_block;`); err != nil {
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return fmt.Errorf("tx.Exec (delete old block table): %w", err)
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}
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return nil
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}
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func DownStateBlocksRefactor(tx *sql.Tx) error {
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panic("DOWN!")
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}
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