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Fix pagination

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This commit is contained in:
Neil Alexander 2022-10-12 12:31:43 +01:00
parent 566bfae939
commit ba9822899a
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GPG key ID: A02A2019A2BB0944
3 changed files with 90 additions and 33 deletions
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49
syncapi/storage/postgres/relations_table.go
View file

@ -48,25 +48,37 @@ const insertRelationSQL = "" +
const deleteRelationSQL = "" +
"DELETE FROM syncapi_relations WHERE room_id = $1 AND child_event_id = $2"
const selectRelationsInRangeSQL = "" +
const selectRelationsInRangeAscSQL = "" +
"SELECT id, room_id, child_event_id, rel_type FROM syncapi_relations" +
" WHERE room_id = $1 AND event_id = $2 AND id > $3 AND id <= $4" +
" ORDER BY id ASC LIMIT $5"
const selectRelationsInRangeDescSQL = "" +
"SELECT id, room_id, child_event_id, rel_type FROM syncapi_relations" +
" WHERE room_id = $1 AND event_id = $2 AND id >= $3 AND id < $4" +
" ORDER BY id DESC LIMIT $5"
const selectRelationsByTypeInRangeSQL = "" +
const selectRelationsByTypeInRangeAscSQL = "" +
"SELECT id, room_id, child_event_id, rel_type FROM syncapi_relations" +
" WHERE room_id = $1 AND event_id = $2 AND rel_type = $3 AND id > $4 AND id <= $5" +
" ORDER BY id ASC LIMIT $6"
const selectRelationsByTypeInRangeDescSQL = "" +
"SELECT id, room_id, child_event_id, rel_type FROM syncapi_relations" +
" WHERE room_id = $1 AND event_id = $2 AND rel_type = $3 AND id >= $4 AND id < $5" +
" ORDER BY id DESC LIMIT $6"
const selectMaxRelationIDSQL = "" +
"SELECT MAX(id) FROM syncapi_relations"
type relationsStatements struct {
insertRelationStmt *sql.Stmt
selectRelationsInRangeStmt *sql.Stmt
selectRelationsByTypeInRangeStmt *sql.Stmt
deleteRelationStmt *sql.Stmt
selectMaxRelationIDStmt *sql.Stmt
insertRelationStmt *sql.Stmt
selectRelationsInRangeAscStmt *sql.Stmt
selectRelationsInRangeDescStmt *sql.Stmt
selectRelationsByTypeInRangeAscStmt *sql.Stmt
selectRelationsByTypeInRangeDescStmt *sql.Stmt
deleteRelationStmt *sql.Stmt
selectMaxRelationIDStmt *sql.Stmt
}
func NewPostgresRelationsTable(db *sql.DB) (tables.Relations, error) {
@ -78,10 +90,16 @@ func NewPostgresRelationsTable(db *sql.DB) (tables.Relations, error) {
if s.insertRelationStmt, err = db.Prepare(insertRelationSQL); err != nil {
return nil, err
}
if s.selectRelationsInRangeStmt, err = db.Prepare(selectRelationsInRangeSQL); err != nil {
if s.selectRelationsInRangeAscStmt, err = db.Prepare(selectRelationsInRangeAscSQL); err != nil {
return nil, err
}
if s.selectRelationsByTypeInRangeStmt, err = db.Prepare(selectRelationsByTypeInRangeSQL); err != nil {
if s.selectRelationsInRangeDescStmt, err = db.Prepare(selectRelationsInRangeDescSQL); err != nil {
return nil, err
}
if s.selectRelationsByTypeInRangeAscStmt, err = db.Prepare(selectRelationsByTypeInRangeAscSQL); err != nil {
return nil, err
}
if s.selectRelationsByTypeInRangeDescStmt, err = db.Prepare(selectRelationsByTypeInRangeDescSQL); err != nil {
return nil, err
}
if s.deleteRelationStmt, err = db.Prepare(deleteRelationSQL); err != nil {
@ -121,13 +139,22 @@ func (s *relationsStatements) SelectRelationsInRange(
r types.Range, limit int,
) (map[string][]types.RelationEntry, types.StreamPosition, error) {
var lastPos types.StreamPosition
var stmt *sql.Stmt
var rows *sql.Rows
var err error
if relType != "" {
stmt := sqlutil.TxStmt(txn, s.selectRelationsByTypeInRangeStmt)
if r.Backwards {
stmt = sqlutil.TxStmt(txn, s.selectRelationsByTypeInRangeDescStmt)
} else {
stmt = sqlutil.TxStmt(txn, s.selectRelationsByTypeInRangeAscStmt)
}
rows, err = stmt.QueryContext(ctx, roomID, eventID, relType, r.Low(), r.High(), limit)
} else {
stmt := sqlutil.TxStmt(txn, s.selectRelationsInRangeStmt)
if r.Backwards {
stmt = sqlutil.TxStmt(txn, s.selectRelationsInRangeDescStmt)
} else {
stmt = sqlutil.TxStmt(txn, s.selectRelationsInRangeAscStmt)
}
rows, err = stmt.QueryContext(ctx, roomID, eventID, r.Low(), r.High(), limit)
}
if err != nil {

23
syncapi/storage/shared/storage_sync.go
View file

@ -605,13 +605,18 @@ func (d *DatabaseTransaction) RelationsFor(ctx context.Context, roomID, eventID,
To: to,
Backwards: backwards,
}
if r.To == 0 && !backwards {
if r.To, err = d.MaxStreamPositionForRelations(ctx); err != nil {
return nil, "", "", fmt.Errorf("d.MaxStreamPositionForRelations: %w", err)
if r.Backwards {
if r.From == 0 {
if r.From, err = d.MaxStreamPositionForRelations(ctx); err != nil {
return nil, "", "", fmt.Errorf("d.MaxStreamPositionForRelations: %w", err)
}
r.From++
}
} else if r.From == 0 && backwards {
if r.From, err = d.MaxStreamPositionForRelations(ctx); err != nil {
return nil, "", "", fmt.Errorf("d.MaxStreamPositionForRelations: %w", err)
} else {
if r.To == 0 {
if r.To, err = d.MaxStreamPositionForRelations(ctx); err != nil {
return nil, "", "", fmt.Errorf("d.MaxStreamPositionForRelations: %w", err)
}
}
}
@ -641,13 +646,11 @@ func (d *DatabaseTransaction) RelationsFor(ctx context.Context, roomID, eventID,
// Otherwise, let's try and work out what sensible prev_batch and next_batch values
// could be.
if from > 0 {
prevBatch = fmt.Sprintf("%d", r.Low()-1)
}
if len(entries) > limit {
nextBatch = fmt.Sprintf("%d", entries[len(entries)-1].Position)
entries = entries[:len(entries)-1]
nextBatch = fmt.Sprintf("%d", entries[len(entries)-1].Position)
}
// TODO: set prevBatch? doesn't seem to affect the tests...
// Extract all of the event IDs from the relation entries so that we can pull the
// events out of the database.

51
syncapi/storage/sqlite3/relations_table.go
View file

@ -46,26 +46,38 @@ const insertRelationSQL = "" +
const deleteRelationSQL = "" +
"DELETE FROM syncapi_relations WHERE room_id = $1 AND child_event_id = $2"
const selectRelationsInRangeSQL = "" +
const selectRelationsInRangeAscSQL = "" +
"SELECT id, room_id, child_event_id, rel_type FROM syncapi_relations" +
" WHERE room_id = $1 AND event_id = $2 AND id > $3 AND id <= $4" +
" ORDER BY id ASC LIMIT $5"
const selectRelationsInRangeDescSQL = "" +
"SELECT id, room_id, child_event_id, rel_type FROM syncapi_relations" +
" WHERE room_id = $1 AND event_id = $2 AND id >= $3 AND id < $4" +
" ORDER BY id DESC LIMIT $5"
const selectRelationsByTypeInRangeSQL = "" +
const selectRelationsByTypeInRangeAscSQL = "" +
"SELECT id, room_id, child_event_id, rel_type FROM syncapi_relations" +
" WHERE room_id = $1 AND event_id = $2 AND rel_type = $3 AND id > $4 AND id <= $5" +
" ORDER BY id ASC LIMIT $6"
const selectRelationsByTypeInRangeDescSQL = "" +
"SELECT id, room_id, child_event_id, rel_type FROM syncapi_relations" +
" WHERE room_id = $1 AND event_id = $2 AND rel_type = $3 AND id >= $4 AND id < $5" +
" ORDER BY id DESC LIMIT $6"
const selectMaxRelationIDSQL = "" +
"SELECT MAX(id) FROM syncapi_relations"
type relationsStatements struct {
streamIDStatements *StreamIDStatements
insertRelationStmt *sql.Stmt
selectRelationsInRangeStmt *sql.Stmt
selectRelationsByTypeInRangeStmt *sql.Stmt
deleteRelationStmt *sql.Stmt
selectMaxRelationIDStmt *sql.Stmt
streamIDStatements *StreamIDStatements
insertRelationStmt *sql.Stmt
selectRelationsInRangeAscStmt *sql.Stmt
selectRelationsInRangeDescStmt *sql.Stmt
selectRelationsByTypeInRangeAscStmt *sql.Stmt
selectRelationsByTypeInRangeDescStmt *sql.Stmt
deleteRelationStmt *sql.Stmt
selectMaxRelationIDStmt *sql.Stmt
}
func NewSqliteRelationsTable(db *sql.DB, streamID *StreamIDStatements) (tables.Relations, error) {
@ -79,10 +91,16 @@ func NewSqliteRelationsTable(db *sql.DB, streamID *StreamIDStatements) (tables.R
if s.insertRelationStmt, err = db.Prepare(insertRelationSQL); err != nil {
return nil, err
}
if s.selectRelationsInRangeStmt, err = db.Prepare(selectRelationsInRangeSQL); err != nil {
if s.selectRelationsInRangeAscStmt, err = db.Prepare(selectRelationsInRangeAscSQL); err != nil {
return nil, err
}
if s.selectRelationsByTypeInRangeStmt, err = db.Prepare(selectRelationsByTypeInRangeSQL); err != nil {
if s.selectRelationsInRangeDescStmt, err = db.Prepare(selectRelationsInRangeDescSQL); err != nil {
return nil, err
}
if s.selectRelationsByTypeInRangeAscStmt, err = db.Prepare(selectRelationsByTypeInRangeAscSQL); err != nil {
return nil, err
}
if s.selectRelationsByTypeInRangeDescStmt, err = db.Prepare(selectRelationsByTypeInRangeDescSQL); err != nil {
return nil, err
}
if s.deleteRelationStmt, err = db.Prepare(deleteRelationSQL); err != nil {
@ -125,13 +143,22 @@ func (s *relationsStatements) SelectRelationsInRange(
r types.Range, limit int,
) (map[string][]types.RelationEntry, types.StreamPosition, error) {
var lastPos types.StreamPosition
var stmt *sql.Stmt
var rows *sql.Rows
var err error
if relType != "" {
stmt := sqlutil.TxStmt(txn, s.selectRelationsByTypeInRangeStmt)
if r.Backwards {
stmt = sqlutil.TxStmt(txn, s.selectRelationsByTypeInRangeDescStmt)
} else {
stmt = sqlutil.TxStmt(txn, s.selectRelationsByTypeInRangeAscStmt)
}
rows, err = stmt.QueryContext(ctx, roomID, eventID, relType, r.Low(), r.High(), limit)
} else {
stmt := sqlutil.TxStmt(txn, s.selectRelationsInRangeStmt)
if r.Backwards {
stmt = sqlutil.TxStmt(txn, s.selectRelationsInRangeDescStmt)
} else {
stmt = sqlutil.TxStmt(txn, s.selectRelationsInRangeAscStmt)
}
rows, err = stmt.QueryContext(ctx, roomID, eventID, r.Low(), r.High(), limit)
}
if err != nil {