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Drop reference_sha column (#3083)

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Companion PR to https://github.com/matrix-org/gomatrixserverlib/pull/383
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Till 2023-05-24 12:14:42 +02:00 • committed by GitHub
parent 5d6221d191
commit 11b557097c
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29 changed files with 299 additions and 227 deletions
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47
roomserver/storage/sqlite3/previous_events_table.go
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@ -18,10 +18,12 @@ package sqlite3
import (
"context"
"database/sql"
"errors"
"fmt"
"strings"
"github.com/matrix-org/dendrite/internal/sqlutil"
"github.com/matrix-org/dendrite/roomserver/storage/sqlite3/deltas"
"github.com/matrix-org/dendrite/roomserver/storage/tables"
"github.com/matrix-org/dendrite/roomserver/types"
)
@ -34,9 +36,8 @@ import (
const previousEventSchema = `
CREATE TABLE IF NOT EXISTS roomserver_previous_events (
previous_event_id TEXT NOT NULL,
previous_reference_sha256 BLOB,
event_nids TEXT NOT NULL,
UNIQUE (previous_event_id, previous_reference_sha256)
UNIQUE (previous_event_id)
);
`
@ -47,20 +48,20 @@ const previousEventSchema = `
// The lock is necessary to avoid data races when checking whether an event is already referenced by another event.
const insertPreviousEventSQL = `
INSERT OR REPLACE INTO roomserver_previous_events
(previous_event_id, previous_reference_sha256, event_nids)
VALUES ($1, $2, $3)
(previous_event_id, event_nids)
VALUES ($1, $2)
`
const selectPreviousEventNIDsSQL = `
SELECT event_nids FROM roomserver_previous_events
WHERE previous_event_id = $1 AND previous_reference_sha256 = $2
WHERE previous_event_id = $1
`
// Check if the event is referenced by another event in the table.
// This should only be done while holding a "FOR UPDATE" lock on the row in the rooms table for this room.
const selectPreviousEventExistsSQL = `
SELECT 1 FROM roomserver_previous_events
WHERE previous_event_id = $1 AND previous_reference_sha256 = $2
WHERE previous_event_id = $1
`
type previousEventStatements struct {
@ -72,7 +73,30 @@ type previousEventStatements struct {
func CreatePrevEventsTable(db *sql.DB) error {
_, err := db.Exec(previousEventSchema)
return err
if err != nil {
return err
}
// check if the column exists
var cName string
migrationName := "roomserver: drop column reference_sha from roomserver_prev_events"
err = db.QueryRowContext(context.Background(), `SELECT p.name FROM sqlite_master AS m JOIN pragma_table_info(m.name) AS p WHERE m.name = 'roomserver_previous_events' AND p.name = 'previous_reference_sha256'`).Scan(&cName)
if err != nil {
if errors.Is(err, sql.ErrNoRows) { // migration was already executed, as the column was removed
if err = sqlutil.InsertMigration(context.Background(), db, migrationName); err != nil {
return fmt.Errorf("unable to manually insert migration '%s': %w", migrationName, err)
}
return nil
}
return err
}
m := sqlutil.NewMigrator(db)
m.AddMigrations([]sqlutil.Migration{
{
Version: migrationName,
Up: deltas.UpDropEventReferenceSHAPrevEvents,
},
}...)
return m.Up(context.Background())
}
func PreparePrevEventsTable(db *sql.DB) (tables.PreviousEvents, error) {
@ -91,13 +115,12 @@ func (s *previousEventStatements) InsertPreviousEvent(
ctx context.Context,
txn *sql.Tx,
previousEventID string,
previousEventReferenceSHA256 []byte,
eventNID types.EventNID,
) error {
var eventNIDs string
eventNIDAsString := fmt.Sprintf("%d", eventNID)
selectStmt := sqlutil.TxStmt(txn, s.selectPreviousEventExistsStmt)
err := selectStmt.QueryRowContext(ctx, previousEventID, previousEventReferenceSHA256).Scan(&eventNIDs)
err := selectStmt.QueryRowContext(ctx, previousEventID).Scan(&eventNIDs)
if err != nil && err != sql.ErrNoRows {
return fmt.Errorf("selectStmt.QueryRowContext.Scan: %w", err)
}
@ -115,7 +138,7 @@ func (s *previousEventStatements) InsertPreviousEvent(
}
insertStmt := sqlutil.TxStmt(txn, s.insertPreviousEventStmt)
_, err = insertStmt.ExecContext(
ctx, previousEventID, previousEventReferenceSHA256, eventNIDs,
ctx, previousEventID, eventNIDs,
)
return err
}
@ -123,9 +146,9 @@ func (s *previousEventStatements) InsertPreviousEvent(
// Check if the event reference exists
// Returns sql.ErrNoRows if the event reference doesn't exist.
func (s *previousEventStatements) SelectPreviousEventExists(
ctx context.Context, txn *sql.Tx, eventID string, eventReferenceSHA256 []byte,
ctx context.Context, txn *sql.Tx, eventID string,
) error {
var ok int64
stmt := sqlutil.TxStmt(txn, s.selectPreviousEventExistsStmt)
return stmt.QueryRowContext(ctx, eventID, eventReferenceSHA256).Scan(&ok)
return stmt.QueryRowContext(ctx, eventID).Scan(&ok)
}