mirror of
https://gitee.com/milvus-io/milvus.git
synced 2024-12-02 03:48:37 +08:00
1061 lines
36 KiB
Go
1061 lines
36 KiB
Go
package proxy
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import (
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"context"
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"fmt"
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"math"
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"strconv"
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"github.com/cockroachdb/errors"
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"github.com/samber/lo"
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"go.opentelemetry.io/otel"
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"go.opentelemetry.io/otel/trace"
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"go.uber.org/zap"
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"google.golang.org/protobuf/proto"
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"github.com/milvus-io/milvus-proto/go-api/v2/commonpb"
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"github.com/milvus-io/milvus-proto/go-api/v2/milvuspb"
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"github.com/milvus-io/milvus-proto/go-api/v2/schemapb"
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"github.com/milvus-io/milvus/internal/parser/planparserv2"
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"github.com/milvus-io/milvus/internal/proto/internalpb"
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"github.com/milvus-io/milvus/internal/proto/planpb"
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"github.com/milvus-io/milvus/internal/proto/querypb"
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"github.com/milvus-io/milvus/internal/types"
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"github.com/milvus-io/milvus/internal/util/exprutil"
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"github.com/milvus-io/milvus/internal/util/reduce"
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"github.com/milvus-io/milvus/pkg/log"
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"github.com/milvus-io/milvus/pkg/metrics"
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"github.com/milvus-io/milvus/pkg/util/commonpbutil"
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"github.com/milvus-io/milvus/pkg/util/funcutil"
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"github.com/milvus-io/milvus/pkg/util/merr"
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"github.com/milvus-io/milvus/pkg/util/paramtable"
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"github.com/milvus-io/milvus/pkg/util/timerecord"
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"github.com/milvus-io/milvus/pkg/util/tsoutil"
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"github.com/milvus-io/milvus/pkg/util/typeutil"
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)
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const (
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SearchTaskName = "SearchTask"
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SearchLevelKey = "level"
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// requeryThreshold is the estimated threshold for the size of the search results.
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// If the number of estimated search results exceeds this threshold,
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// a second query request will be initiated to retrieve output fields data.
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// In this case, the first search will not return any output field from QueryNodes.
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requeryThreshold = 0.5 * 1024 * 1024
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radiusKey = "radius"
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rangeFilterKey = "range_filter"
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)
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type searchTask struct {
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baseTask
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Condition
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ctx context.Context
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*internalpb.SearchRequest
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result *milvuspb.SearchResults
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request *milvuspb.SearchRequest
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tr *timerecord.TimeRecorder
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collectionName string
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schema *schemaInfo
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requery bool
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partitionKeyMode bool
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enableMaterializedView bool
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mustUsePartitionKey bool
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resultSizeInsufficient bool
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isTopkReduce bool
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userOutputFields []string
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userDynamicFields []string
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resultBuf *typeutil.ConcurrentSet[*internalpb.SearchResults]
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partitionIDsSet *typeutil.ConcurrentSet[UniqueID]
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qc types.QueryCoordClient
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node types.ProxyComponent
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lb LBPolicy
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queryChannelsTs map[string]Timestamp
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queryInfos []*planpb.QueryInfo
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relatedDataSize int64
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reScorers []reScorer
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rankParams *rankParams
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groupScorer func(group *Group) error
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isIterator bool
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}
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func (t *searchTask) CanSkipAllocTimestamp() bool {
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var consistencyLevel commonpb.ConsistencyLevel
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useDefaultConsistency := t.request.GetUseDefaultConsistency()
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if !useDefaultConsistency {
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// legacy SDK & restful behavior
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if t.request.GetConsistencyLevel() == commonpb.ConsistencyLevel_Strong && t.request.GetGuaranteeTimestamp() > 0 {
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return true
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}
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consistencyLevel = t.request.GetConsistencyLevel()
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} else {
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collID, err := globalMetaCache.GetCollectionID(context.Background(), t.request.GetDbName(), t.request.GetCollectionName())
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if err != nil { // err is not nil if collection not exists
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log.Warn("search task get collectionID failed, can't skip alloc timestamp",
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zap.String("collectionName", t.request.GetCollectionName()), zap.Error(err))
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return false
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}
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collectionInfo, err2 := globalMetaCache.GetCollectionInfo(context.Background(), t.request.GetDbName(), t.request.GetCollectionName(), collID)
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if err2 != nil {
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log.Warn("search task get collection info failed, can't skip alloc timestamp",
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zap.String("collectionName", t.request.GetCollectionName()), zap.Error(err))
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return false
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}
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consistencyLevel = collectionInfo.consistencyLevel
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}
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return consistencyLevel != commonpb.ConsistencyLevel_Strong
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}
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func (t *searchTask) PreExecute(ctx context.Context) error {
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ctx, sp := otel.Tracer(typeutil.ProxyRole).Start(ctx, "Proxy-Search-PreExecute")
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defer sp.End()
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t.SearchRequest.IsAdvanced = len(t.request.GetSubReqs()) > 0
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t.Base.MsgType = commonpb.MsgType_Search
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t.Base.SourceID = paramtable.GetNodeID()
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collectionName := t.request.CollectionName
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t.collectionName = collectionName
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collID, err := globalMetaCache.GetCollectionID(ctx, t.request.GetDbName(), collectionName)
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if err != nil { // err is not nil if collection not exists
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return merr.WrapErrAsInputErrorWhen(err, merr.ErrCollectionNotFound, merr.ErrDatabaseNotFound)
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}
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t.SearchRequest.DbID = 0 // todo
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t.SearchRequest.CollectionID = collID
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log := log.Ctx(ctx).With(zap.Int64("collID", collID), zap.String("collName", collectionName))
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t.schema, err = globalMetaCache.GetCollectionSchema(ctx, t.request.GetDbName(), collectionName)
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if err != nil {
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log.Warn("get collection schema failed", zap.Error(err))
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return err
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}
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t.partitionKeyMode, err = isPartitionKeyMode(ctx, t.request.GetDbName(), collectionName)
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if err != nil {
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log.Warn("is partition key mode failed", zap.Error(err))
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return err
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}
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if t.partitionKeyMode && len(t.request.GetPartitionNames()) != 0 {
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return errors.New("not support manually specifying the partition names if partition key mode is used")
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}
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if t.mustUsePartitionKey && !t.partitionKeyMode {
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return merr.WrapErrAsInputError(merr.WrapErrParameterInvalidMsg("must use partition key in the search request " +
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"because the mustUsePartitionKey config is true"))
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}
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if !t.partitionKeyMode && len(t.request.GetPartitionNames()) > 0 {
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// translate partition name to partition ids. Use regex-pattern to match partition name.
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t.SearchRequest.PartitionIDs, err = getPartitionIDs(ctx, t.request.GetDbName(), collectionName, t.request.GetPartitionNames())
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if err != nil {
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log.Warn("failed to get partition ids", zap.Error(err))
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return err
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}
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}
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t.request.OutputFields, t.userOutputFields, t.userDynamicFields, err = translateOutputFields(t.request.OutputFields, t.schema, false)
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if err != nil {
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log.Warn("translate output fields failed", zap.Error(err))
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return err
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}
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log.Debug("translate output fields",
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zap.Strings("output fields", t.request.GetOutputFields()))
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if t.SearchRequest.GetIsAdvanced() {
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if len(t.request.GetSubReqs()) > defaultMaxSearchRequest {
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return errors.New(fmt.Sprintf("maximum of ann search requests is %d", defaultMaxSearchRequest))
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}
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}
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if t.SearchRequest.GetIsAdvanced() {
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t.rankParams, err = parseRankParams(t.request.GetSearchParams(), t.schema.CollectionSchema)
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if err != nil {
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log.Info("parseRankParams failed", zap.Error(err))
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return err
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}
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} else {
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t.rankParams = nil
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}
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// Manually update nq if not set.
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nq, err := t.checkNq(ctx)
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if err != nil {
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log.Info("failed to check nq", zap.Error(err))
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return err
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}
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t.SearchRequest.Nq = nq
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var ignoreGrowing bool
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// parse common search params
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for i, kv := range t.request.GetSearchParams() {
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if kv.GetKey() == IgnoreGrowingKey {
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ignoreGrowing, err = strconv.ParseBool(kv.GetValue())
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if err != nil {
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return errors.New("parse search growing failed")
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}
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t.request.SearchParams = append(t.request.GetSearchParams()[:i], t.request.GetSearchParams()[i+1:]...)
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break
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}
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}
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t.SearchRequest.IgnoreGrowing = ignoreGrowing
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outputFieldIDs, err := getOutputFieldIDs(t.schema, t.request.GetOutputFields())
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if err != nil {
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log.Info("fail to get output field ids", zap.Error(err))
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return err
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}
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t.SearchRequest.OutputFieldsId = outputFieldIDs
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// Currently, we get vectors by requery. Once we support getting vectors from search,
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// searches with small result size could no longer need requery.
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vectorOutputFields := lo.Filter(t.schema.GetFields(), func(field *schemapb.FieldSchema, _ int) bool {
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return lo.Contains(t.request.GetOutputFields(), field.GetName()) && typeutil.IsVectorType(field.GetDataType())
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})
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if t.SearchRequest.GetIsAdvanced() {
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t.requery = len(t.request.OutputFields) > 0
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err = t.initAdvancedSearchRequest(ctx)
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} else {
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t.requery = len(vectorOutputFields) > 0
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err = t.initSearchRequest(ctx)
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}
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if err != nil {
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log.Debug("init search request failed", zap.Error(err))
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return err
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}
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collectionInfo, err2 := globalMetaCache.GetCollectionInfo(ctx, t.request.GetDbName(), collectionName, t.CollectionID)
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if err2 != nil {
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log.Warn("Proxy::searchTask::PreExecute failed to GetCollectionInfo from cache",
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zap.String("collectionName", collectionName), zap.Int64("collectionID", t.CollectionID), zap.Error(err2))
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return err2
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}
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guaranteeTs := t.request.GetGuaranteeTimestamp()
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var consistencyLevel commonpb.ConsistencyLevel
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useDefaultConsistency := t.request.GetUseDefaultConsistency()
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if useDefaultConsistency {
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consistencyLevel = collectionInfo.consistencyLevel
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guaranteeTs = parseGuaranteeTsFromConsistency(guaranteeTs, t.BeginTs(), consistencyLevel)
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} else {
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consistencyLevel = t.request.GetConsistencyLevel()
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// Compatibility logic, parse guarantee timestamp
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if consistencyLevel == 0 && guaranteeTs > 0 {
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guaranteeTs = parseGuaranteeTs(guaranteeTs, t.BeginTs())
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} else {
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// parse from guarantee timestamp and user input consistency level
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guaranteeTs = parseGuaranteeTsFromConsistency(guaranteeTs, t.BeginTs(), consistencyLevel)
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}
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}
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t.SearchRequest.GuaranteeTimestamp = guaranteeTs
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t.SearchRequest.ConsistencyLevel = consistencyLevel
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if t.isIterator && t.request.GetGuaranteeTimestamp() > 0 {
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t.MvccTimestamp = t.request.GetGuaranteeTimestamp()
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t.GuaranteeTimestamp = t.request.GetGuaranteeTimestamp()
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}
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if deadline, ok := t.TraceCtx().Deadline(); ok {
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t.SearchRequest.TimeoutTimestamp = tsoutil.ComposeTSByTime(deadline, 0)
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}
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// Set username of this search request for feature like task scheduling.
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if username, _ := GetCurUserFromContext(ctx); username != "" {
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t.SearchRequest.Username = username
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}
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t.resultBuf = typeutil.NewConcurrentSet[*internalpb.SearchResults]()
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log.Debug("search PreExecute done.",
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zap.Uint64("guarantee_ts", guaranteeTs),
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zap.Bool("use_default_consistency", useDefaultConsistency),
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zap.Any("consistency level", consistencyLevel),
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zap.Uint64("timeout_ts", t.SearchRequest.GetTimeoutTimestamp()))
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return nil
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}
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func (t *searchTask) checkNq(ctx context.Context) (int64, error) {
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var nq int64
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if t.SearchRequest.GetIsAdvanced() {
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// In the context of Advanced Search, it is essential to verify that the number of vectors
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// for each individual search, denoted as nq, remains consistent.
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nq = t.request.GetNq()
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for _, req := range t.request.GetSubReqs() {
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subNq, err := getNqFromSubSearch(req)
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if err != nil {
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return 0, err
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}
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req.Nq = subNq
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if nq == 0 {
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nq = subNq
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continue
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}
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if subNq != nq {
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err = merr.WrapErrParameterInvalid(nq, subNq, "sub search request nq should be the same")
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return 0, err
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}
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}
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t.request.Nq = nq
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} else {
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var err error
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nq, err = getNq(t.request)
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if err != nil {
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return 0, err
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}
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t.request.Nq = nq
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}
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// Check if nq is valid:
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// https://milvus.io/docs/limitations.md
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if err := validateNQLimit(nq); err != nil {
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return 0, fmt.Errorf("%s [%d] is invalid, %w", NQKey, nq, err)
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}
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return nq, nil
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}
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func setQueryInfoIfMvEnable(queryInfo *planpb.QueryInfo, t *searchTask, plan *planpb.PlanNode) error {
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if t.enableMaterializedView {
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partitionKeyFieldSchema, err := typeutil.GetPartitionKeyFieldSchema(t.schema.CollectionSchema)
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if err != nil {
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log.Warn("failed to get partition key field schema", zap.Error(err))
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return err
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}
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if typeutil.IsFieldDataTypeSupportMaterializedView(partitionKeyFieldSchema) {
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collInfo, colErr := globalMetaCache.GetCollectionInfo(t.ctx, t.request.GetDbName(), t.collectionName, t.CollectionID)
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if colErr != nil {
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log.Warn("failed to get collection info", zap.Error(colErr))
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return err
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}
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if collInfo.partitionKeyIsolation {
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expr, err := exprutil.ParseExprFromPlan(plan)
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if err != nil {
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log.Warn("failed to parse expr from plan during MV", zap.Error(err))
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return err
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}
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err = exprutil.ValidatePartitionKeyIsolation(expr)
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if err != nil {
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return err
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}
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}
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queryInfo.MaterializedViewInvolved = true
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} else {
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return errors.New("partition key field data type is not supported in materialized view")
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}
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}
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return nil
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}
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func (t *searchTask) initAdvancedSearchRequest(ctx context.Context) error {
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ctx, sp := otel.Tracer(typeutil.ProxyRole).Start(ctx, "init advanced search request")
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defer sp.End()
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t.partitionIDsSet = typeutil.NewConcurrentSet[UniqueID]()
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log := log.Ctx(ctx).With(zap.Int64("collID", t.GetCollectionID()), zap.String("collName", t.collectionName))
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// fetch search_growing from search param
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t.SearchRequest.SubReqs = make([]*internalpb.SubSearchRequest, len(t.request.GetSubReqs()))
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t.queryInfos = make([]*planpb.QueryInfo, len(t.request.GetSubReqs()))
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for index, subReq := range t.request.GetSubReqs() {
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plan, queryInfo, offset, _, err := t.tryGeneratePlan(subReq.GetSearchParams(), subReq.GetDsl(), subReq.GetExprTemplateValues())
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if err != nil {
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return err
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}
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internalSubReq := &internalpb.SubSearchRequest{
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Dsl: subReq.GetDsl(),
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PlaceholderGroup: subReq.GetPlaceholderGroup(),
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DslType: subReq.GetDslType(),
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SerializedExprPlan: nil,
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Nq: subReq.GetNq(),
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PartitionIDs: nil,
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Topk: queryInfo.GetTopk(),
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Offset: offset,
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MetricType: queryInfo.GetMetricType(),
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GroupByFieldId: t.rankParams.GetGroupByFieldId(),
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GroupSize: t.rankParams.GetGroupSize(),
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}
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internalSubReq.FieldId = queryInfo.GetQueryFieldId()
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// set PartitionIDs for sub search
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if t.partitionKeyMode {
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// isolation has tighter constraint, check first
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mvErr := setQueryInfoIfMvEnable(queryInfo, t, plan)
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if mvErr != nil {
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return mvErr
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}
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partitionIDs, err2 := t.tryParsePartitionIDsFromPlan(plan)
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if err2 != nil {
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return err2
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}
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if len(partitionIDs) > 0 {
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internalSubReq.PartitionIDs = partitionIDs
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t.partitionIDsSet.Upsert(partitionIDs...)
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}
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} else {
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internalSubReq.PartitionIDs = t.SearchRequest.GetPartitionIDs()
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}
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if t.requery {
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plan.OutputFieldIds = nil
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plan.DynamicFields = nil
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} else {
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plan.OutputFieldIds = t.SearchRequest.OutputFieldsId
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plan.DynamicFields = t.userDynamicFields
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}
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internalSubReq.SerializedExprPlan, err = proto.Marshal(plan)
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if err != nil {
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return err
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}
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t.SearchRequest.SubReqs[index] = internalSubReq
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t.queryInfos[index] = queryInfo
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log.Debug("proxy init search request",
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zap.Int64s("plan.OutputFieldIds", plan.GetOutputFieldIds()),
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zap.Stringer("plan", plan)) // may be very large if large term passed.
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}
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t.SearchRequest.GroupByFieldId = t.rankParams.GetGroupByFieldId()
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t.SearchRequest.GroupSize = t.rankParams.GetGroupSize()
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// used for requery
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if t.partitionKeyMode {
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t.SearchRequest.PartitionIDs = t.partitionIDsSet.Collect()
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}
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var err error
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t.reScorers, err = NewReScorers(len(t.request.GetSubReqs()), t.request.GetSearchParams())
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if err != nil {
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log.Info("generate reScorer failed", zap.Any("params", t.request.GetSearchParams()), zap.Error(err))
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return err
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}
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|
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// set up groupScorer for hybridsearch+groupBy
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groupScorerStr, err := funcutil.GetAttrByKeyFromRepeatedKV(RankGroupScorer, t.request.GetSearchParams())
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if err != nil {
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groupScorerStr = MaxScorer
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}
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groupScorer, err := GetGroupScorer(groupScorerStr)
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if err != nil {
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return err
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}
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t.groupScorer = groupScorer
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return nil
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}
|
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func (t *searchTask) initSearchRequest(ctx context.Context) error {
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ctx, sp := otel.Tracer(typeutil.ProxyRole).Start(ctx, "init search request")
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defer sp.End()
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log := log.Ctx(ctx).With(zap.Int64("collID", t.GetCollectionID()), zap.String("collName", t.collectionName))
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// fetch search_growing from search param
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plan, queryInfo, offset, isIterator, err := t.tryGeneratePlan(t.request.GetSearchParams(), t.request.GetDsl(), t.request.GetExprTemplateValues())
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if err != nil {
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return err
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}
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t.isIterator = isIterator
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t.SearchRequest.Offset = offset
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t.SearchRequest.FieldId = queryInfo.GetQueryFieldId()
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if t.partitionKeyMode {
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// isolation has tighter constraint, check first
|
|
mvErr := setQueryInfoIfMvEnable(queryInfo, t, plan)
|
|
if mvErr != nil {
|
|
return mvErr
|
|
}
|
|
partitionIDs, err2 := t.tryParsePartitionIDsFromPlan(plan)
|
|
if err2 != nil {
|
|
return err2
|
|
}
|
|
if len(partitionIDs) > 0 {
|
|
t.SearchRequest.PartitionIDs = partitionIDs
|
|
}
|
|
}
|
|
|
|
if t.requery {
|
|
plan.OutputFieldIds = nil
|
|
} else {
|
|
plan.OutputFieldIds = t.SearchRequest.OutputFieldsId
|
|
plan.DynamicFields = t.userDynamicFields
|
|
}
|
|
|
|
t.SearchRequest.SerializedExprPlan, err = proto.Marshal(plan)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
t.SearchRequest.PlaceholderGroup = t.request.PlaceholderGroup
|
|
t.SearchRequest.Topk = queryInfo.GetTopk()
|
|
t.SearchRequest.MetricType = queryInfo.GetMetricType()
|
|
t.queryInfos = append(t.queryInfos, queryInfo)
|
|
t.SearchRequest.DslType = commonpb.DslType_BoolExprV1
|
|
t.SearchRequest.GroupByFieldId = queryInfo.GroupByFieldId
|
|
t.SearchRequest.GroupSize = queryInfo.GroupSize
|
|
log.Debug("proxy init search request",
|
|
zap.Int64s("plan.OutputFieldIds", plan.GetOutputFieldIds()),
|
|
zap.Stringer("plan", plan)) // may be very large if large term passed.
|
|
|
|
return nil
|
|
}
|
|
|
|
func (t *searchTask) tryGeneratePlan(params []*commonpb.KeyValuePair, dsl string, exprTemplateValues map[string]*schemapb.TemplateValue) (*planpb.PlanNode, *planpb.QueryInfo, int64, bool, error) {
|
|
annsFieldName, err := funcutil.GetAttrByKeyFromRepeatedKV(AnnsFieldKey, params)
|
|
if err != nil || len(annsFieldName) == 0 {
|
|
vecFields := typeutil.GetVectorFieldSchemas(t.schema.CollectionSchema)
|
|
if len(vecFields) == 0 {
|
|
return nil, nil, 0, false, errors.New(AnnsFieldKey + " not found in schema")
|
|
}
|
|
|
|
if enableMultipleVectorFields && len(vecFields) > 1 {
|
|
return nil, nil, 0, false, errors.New("multiple anns_fields exist, please specify a anns_field in search_params")
|
|
}
|
|
annsFieldName = vecFields[0].Name
|
|
}
|
|
searchInfo := parseSearchInfo(params, t.schema.CollectionSchema, t.rankParams)
|
|
if searchInfo.parseError != nil {
|
|
return nil, nil, 0, false, searchInfo.parseError
|
|
}
|
|
annField := typeutil.GetFieldByName(t.schema.CollectionSchema, annsFieldName)
|
|
if searchInfo.planInfo.GetGroupByFieldId() != -1 && annField.GetDataType() == schemapb.DataType_BinaryVector {
|
|
return nil, nil, 0, false, errors.New("not support search_group_by operation based on binary vector column")
|
|
}
|
|
|
|
searchInfo.planInfo.QueryFieldId = annField.GetFieldID()
|
|
plan, planErr := planparserv2.CreateSearchPlan(t.schema.schemaHelper, dsl, annsFieldName, searchInfo.planInfo, exprTemplateValues)
|
|
if planErr != nil {
|
|
log.Warn("failed to create query plan", zap.Error(planErr),
|
|
zap.String("dsl", dsl), // may be very large if large term passed.
|
|
zap.String("anns field", annsFieldName), zap.Any("query info", searchInfo.planInfo))
|
|
return nil, nil, 0, false, merr.WrapErrParameterInvalidMsg("failed to create query plan: %v", planErr)
|
|
}
|
|
log.Debug("create query plan",
|
|
zap.String("dsl", t.request.Dsl), // may be very large if large term passed.
|
|
zap.String("anns field", annsFieldName), zap.Any("query info", searchInfo.planInfo))
|
|
return plan, searchInfo.planInfo, searchInfo.offset, searchInfo.isIterator, nil
|
|
}
|
|
|
|
func (t *searchTask) tryParsePartitionIDsFromPlan(plan *planpb.PlanNode) ([]int64, error) {
|
|
expr, err := exprutil.ParseExprFromPlan(plan)
|
|
if err != nil {
|
|
log.Warn("failed to parse expr", zap.Error(err))
|
|
return nil, err
|
|
}
|
|
partitionKeys := exprutil.ParseKeys(expr, exprutil.PartitionKey)
|
|
hashedPartitionNames, err := assignPartitionKeys(t.ctx, t.request.GetDbName(), t.collectionName, partitionKeys)
|
|
if err != nil {
|
|
log.Warn("failed to assign partition keys", zap.Error(err))
|
|
return nil, err
|
|
}
|
|
|
|
if len(hashedPartitionNames) > 0 {
|
|
// translate partition name to partition ids. Use regex-pattern to match partition name.
|
|
PartitionIDs, err2 := getPartitionIDs(t.ctx, t.request.GetDbName(), t.collectionName, hashedPartitionNames)
|
|
if err2 != nil {
|
|
log.Warn("failed to get partition ids", zap.Error(err2))
|
|
return nil, err2
|
|
}
|
|
return PartitionIDs, nil
|
|
}
|
|
return nil, nil
|
|
}
|
|
|
|
func (t *searchTask) Execute(ctx context.Context) error {
|
|
ctx, sp := otel.Tracer(typeutil.ProxyRole).Start(ctx, "Proxy-Search-Execute")
|
|
defer sp.End()
|
|
log := log.Ctx(ctx).WithLazy(zap.Int64("nq", t.SearchRequest.GetNq()))
|
|
|
|
tr := timerecord.NewTimeRecorder(fmt.Sprintf("proxy execute search %d", t.ID()))
|
|
defer tr.CtxElapse(ctx, "done")
|
|
|
|
err := t.lb.Execute(ctx, CollectionWorkLoad{
|
|
db: t.request.GetDbName(),
|
|
collectionID: t.SearchRequest.CollectionID,
|
|
collectionName: t.collectionName,
|
|
nq: t.Nq,
|
|
exec: t.searchShard,
|
|
})
|
|
if err != nil {
|
|
log.Warn("search execute failed", zap.Error(err))
|
|
return errors.Wrap(err, "failed to search")
|
|
}
|
|
|
|
log.Debug("Search Execute done.",
|
|
zap.Int64("collection", t.GetCollectionID()),
|
|
zap.Int64s("partitionIDs", t.GetPartitionIDs()))
|
|
return nil
|
|
}
|
|
|
|
func (t *searchTask) reduceResults(ctx context.Context, toReduceResults []*internalpb.SearchResults, nq, topK int64, offset int64, queryInfo *planpb.QueryInfo, isAdvance bool) (*milvuspb.SearchResults, error) {
|
|
metricType := ""
|
|
if len(toReduceResults) >= 1 {
|
|
metricType = toReduceResults[0].GetMetricType()
|
|
}
|
|
|
|
ctx, sp := otel.Tracer(typeutil.ProxyRole).Start(ctx, "reduceResults")
|
|
defer sp.End()
|
|
|
|
// Decode all search results
|
|
validSearchResults, err := decodeSearchResults(ctx, toReduceResults)
|
|
if err != nil {
|
|
log.Warn("failed to decode search results", zap.Error(err))
|
|
return nil, err
|
|
}
|
|
|
|
if len(validSearchResults) <= 0 {
|
|
return fillInEmptyResult(nq), nil
|
|
}
|
|
|
|
// Reduce all search results
|
|
log.Debug("proxy search post execute reduce",
|
|
zap.Int64("collection", t.GetCollectionID()),
|
|
zap.Int64s("partitionIDs", t.GetPartitionIDs()),
|
|
zap.Int("number of valid search results", len(validSearchResults)))
|
|
primaryFieldSchema, err := t.schema.GetPkField()
|
|
if err != nil {
|
|
log.Warn("failed to get primary field schema", zap.Error(err))
|
|
return nil, err
|
|
}
|
|
var result *milvuspb.SearchResults
|
|
result, err = reduceSearchResult(ctx, validSearchResults, reduce.NewReduceSearchResultInfo(nq, topK).WithMetricType(metricType).WithPkType(primaryFieldSchema.GetDataType()).
|
|
WithOffset(offset).WithGroupByField(queryInfo.GetGroupByFieldId()).WithGroupSize(queryInfo.GetGroupSize()).WithAdvance(isAdvance))
|
|
if err != nil {
|
|
log.Warn("failed to reduce search results", zap.Error(err))
|
|
return nil, err
|
|
}
|
|
return result, nil
|
|
}
|
|
|
|
func (t *searchTask) PostExecute(ctx context.Context) error {
|
|
ctx, sp := otel.Tracer(typeutil.ProxyRole).Start(ctx, "Proxy-Search-PostExecute")
|
|
defer sp.End()
|
|
|
|
tr := timerecord.NewTimeRecorder("searchTask PostExecute")
|
|
defer func() {
|
|
tr.CtxElapse(ctx, "done")
|
|
}()
|
|
log := log.Ctx(ctx).With(zap.Int64("nq", t.SearchRequest.GetNq()))
|
|
|
|
toReduceResults, err := t.collectSearchResults(ctx)
|
|
if err != nil {
|
|
log.Warn("failed to collect search results", zap.Error(err))
|
|
return err
|
|
}
|
|
|
|
t.queryChannelsTs = make(map[string]uint64)
|
|
t.relatedDataSize = 0
|
|
isTopkReduce := false
|
|
for _, r := range toReduceResults {
|
|
if r.GetIsTopkReduce() {
|
|
isTopkReduce = true
|
|
}
|
|
t.relatedDataSize += r.GetCostAggregation().GetTotalRelatedDataSize()
|
|
for ch, ts := range r.GetChannelsMvcc() {
|
|
t.queryChannelsTs[ch] = ts
|
|
}
|
|
}
|
|
|
|
primaryFieldSchema, err := t.schema.GetPkField()
|
|
if err != nil {
|
|
log.Warn("failed to get primary field schema", zap.Error(err))
|
|
return err
|
|
}
|
|
|
|
// reduce
|
|
if t.SearchRequest.GetIsAdvanced() {
|
|
multipleInternalResults := make([][]*internalpb.SearchResults, len(t.SearchRequest.GetSubReqs()))
|
|
for _, searchResult := range toReduceResults {
|
|
// if get a non-advanced result, skip all
|
|
if !searchResult.GetIsAdvanced() {
|
|
continue
|
|
}
|
|
for _, subResult := range searchResult.GetSubResults() {
|
|
// swallow copy
|
|
internalResults := &internalpb.SearchResults{
|
|
MetricType: subResult.GetMetricType(),
|
|
NumQueries: subResult.GetNumQueries(),
|
|
TopK: subResult.GetTopK(),
|
|
SlicedBlob: subResult.GetSlicedBlob(),
|
|
SlicedNumCount: subResult.GetSlicedNumCount(),
|
|
SlicedOffset: subResult.GetSlicedOffset(),
|
|
IsAdvanced: false,
|
|
}
|
|
reqIndex := subResult.GetReqIndex()
|
|
multipleInternalResults[reqIndex] = append(multipleInternalResults[reqIndex], internalResults)
|
|
}
|
|
}
|
|
multipleMilvusResults := make([]*milvuspb.SearchResults, len(t.SearchRequest.GetSubReqs()))
|
|
for index, internalResults := range multipleInternalResults {
|
|
subReq := t.SearchRequest.GetSubReqs()[index]
|
|
|
|
metricType := ""
|
|
if len(internalResults) >= 1 {
|
|
metricType = internalResults[0].GetMetricType()
|
|
}
|
|
result, err := t.reduceResults(t.ctx, internalResults, subReq.GetNq(), subReq.GetTopk(), subReq.GetOffset(), t.queryInfos[index], true)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
t.reScorers[index].setMetricType(metricType)
|
|
t.reScorers[index].reScore(result)
|
|
multipleMilvusResults[index] = result
|
|
}
|
|
t.result, err = rankSearchResultData(ctx, t.SearchRequest.GetNq(),
|
|
t.rankParams,
|
|
primaryFieldSchema.GetDataType(),
|
|
multipleMilvusResults,
|
|
t.SearchRequest.GetGroupByFieldId(),
|
|
t.SearchRequest.GetGroupSize(),
|
|
t.groupScorer)
|
|
if err != nil {
|
|
log.Warn("rank search result failed", zap.Error(err))
|
|
return err
|
|
}
|
|
} else {
|
|
t.result, err = t.reduceResults(t.ctx, toReduceResults, t.SearchRequest.GetNq(), t.SearchRequest.GetTopk(), t.SearchRequest.GetOffset(), t.queryInfos[0], false)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
// reduce done, get final result
|
|
limit := t.SearchRequest.GetTopk() - t.SearchRequest.GetOffset()
|
|
resultSizeInsufficient := false
|
|
for _, topk := range t.result.Results.Topks {
|
|
if topk < limit {
|
|
resultSizeInsufficient = true
|
|
break
|
|
}
|
|
}
|
|
t.resultSizeInsufficient = resultSizeInsufficient
|
|
t.isTopkReduce = isTopkReduce
|
|
t.result.CollectionName = t.collectionName
|
|
t.fillInFieldInfo()
|
|
|
|
if t.requery {
|
|
err = t.Requery(sp)
|
|
if err != nil {
|
|
log.Warn("failed to requery", zap.Error(err))
|
|
return err
|
|
}
|
|
}
|
|
t.result.Results.OutputFields = t.userOutputFields
|
|
t.result.CollectionName = t.request.GetCollectionName()
|
|
if t.isIterator && t.request.GetGuaranteeTimestamp() == 0 {
|
|
// first page for iteration, need to set up sessionTs for iterator
|
|
t.result.SessionTs = getMaxMvccTsFromChannels(t.queryChannelsTs, t.BeginTs())
|
|
}
|
|
|
|
metrics.ProxyReduceResultLatency.WithLabelValues(strconv.FormatInt(paramtable.GetNodeID(), 10), metrics.SearchLabel).Observe(float64(tr.RecordSpan().Milliseconds()))
|
|
|
|
log.Debug("Search post execute done",
|
|
zap.Int64("collection", t.GetCollectionID()),
|
|
zap.Int64s("partitionIDs", t.GetPartitionIDs()))
|
|
return nil
|
|
}
|
|
|
|
func (t *searchTask) searchShard(ctx context.Context, nodeID int64, qn types.QueryNodeClient, channel string) error {
|
|
searchReq := typeutil.Clone(t.SearchRequest)
|
|
searchReq.GetBase().TargetID = nodeID
|
|
req := &querypb.SearchRequest{
|
|
Req: searchReq,
|
|
DmlChannels: []string{channel},
|
|
Scope: querypb.DataScope_All,
|
|
TotalChannelNum: int32(1),
|
|
}
|
|
|
|
log := log.Ctx(ctx).With(zap.Int64("collection", t.GetCollectionID()),
|
|
zap.Int64s("partitionIDs", t.GetPartitionIDs()),
|
|
zap.Int64("nodeID", nodeID),
|
|
zap.String("channel", channel))
|
|
|
|
var result *internalpb.SearchResults
|
|
var err error
|
|
|
|
result, err = qn.Search(ctx, req)
|
|
if err != nil {
|
|
log.Warn("QueryNode search return error", zap.Error(err))
|
|
globalMetaCache.DeprecateShardCache(t.request.GetDbName(), t.collectionName)
|
|
return err
|
|
}
|
|
if result.GetStatus().GetErrorCode() == commonpb.ErrorCode_NotShardLeader {
|
|
log.Warn("QueryNode is not shardLeader")
|
|
globalMetaCache.DeprecateShardCache(t.request.GetDbName(), t.collectionName)
|
|
return errInvalidShardLeaders
|
|
}
|
|
if result.GetStatus().GetErrorCode() != commonpb.ErrorCode_Success {
|
|
log.Warn("QueryNode search result error",
|
|
zap.String("reason", result.GetStatus().GetReason()))
|
|
return errors.Wrapf(merr.Error(result.GetStatus()), "fail to search on QueryNode %d", nodeID)
|
|
}
|
|
if t.resultBuf != nil {
|
|
t.resultBuf.Insert(result)
|
|
}
|
|
t.lb.UpdateCostMetrics(nodeID, result.CostAggregation)
|
|
|
|
return nil
|
|
}
|
|
|
|
func (t *searchTask) estimateResultSize(nq int64, topK int64) (int64, error) {
|
|
vectorOutputFields := lo.Filter(t.schema.GetFields(), func(field *schemapb.FieldSchema, _ int) bool {
|
|
return lo.Contains(t.request.GetOutputFields(), field.GetName()) && typeutil.IsVectorType(field.GetDataType())
|
|
})
|
|
// Currently, we get vectors by requery. Once we support getting vectors from search,
|
|
// searches with small result size could no longer need requery.
|
|
if len(vectorOutputFields) > 0 {
|
|
return math.MaxInt64, nil
|
|
}
|
|
// If no vector field as output, no need to requery.
|
|
return 0, nil
|
|
|
|
//outputFields := lo.Filter(t.schema.GetFields(), func(field *schemapb.FieldSchema, _ int) bool {
|
|
// return lo.Contains(t.request.GetOutputFields(), field.GetName())
|
|
//})
|
|
//sizePerRecord, err := typeutil.EstimateSizePerRecord(&schemapb.CollectionSchema{Fields: outputFields})
|
|
//if err != nil {
|
|
// return 0, err
|
|
//}
|
|
//return int64(sizePerRecord) * nq * topK, nil
|
|
}
|
|
|
|
func (t *searchTask) Requery(span trace.Span) error {
|
|
queryReq := &milvuspb.QueryRequest{
|
|
Base: &commonpb.MsgBase{
|
|
MsgType: commonpb.MsgType_Retrieve,
|
|
Timestamp: t.BeginTs(),
|
|
},
|
|
DbName: t.request.GetDbName(),
|
|
CollectionName: t.request.GetCollectionName(),
|
|
ConsistencyLevel: t.SearchRequest.GetConsistencyLevel(),
|
|
NotReturnAllMeta: t.request.GetNotReturnAllMeta(),
|
|
Expr: "",
|
|
OutputFields: t.request.GetOutputFields(),
|
|
PartitionNames: t.request.GetPartitionNames(),
|
|
UseDefaultConsistency: false,
|
|
GuaranteeTimestamp: t.SearchRequest.GuaranteeTimestamp,
|
|
}
|
|
pkField, err := typeutil.GetPrimaryFieldSchema(t.schema.CollectionSchema)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
ids := t.result.GetResults().GetIds()
|
|
plan := planparserv2.CreateRequeryPlan(pkField, ids)
|
|
channelsMvcc := make(map[string]Timestamp)
|
|
for k, v := range t.queryChannelsTs {
|
|
channelsMvcc[k] = v
|
|
}
|
|
qt := &queryTask{
|
|
ctx: t.ctx,
|
|
Condition: NewTaskCondition(t.ctx),
|
|
RetrieveRequest: &internalpb.RetrieveRequest{
|
|
Base: commonpbutil.NewMsgBase(
|
|
commonpbutil.WithMsgType(commonpb.MsgType_Retrieve),
|
|
commonpbutil.WithSourceID(paramtable.GetNodeID()),
|
|
),
|
|
ReqID: paramtable.GetNodeID(),
|
|
PartitionIDs: t.GetPartitionIDs(), // use search partitionIDs
|
|
},
|
|
request: queryReq,
|
|
plan: plan,
|
|
qc: t.node.(*Proxy).queryCoord,
|
|
lb: t.node.(*Proxy).lbPolicy,
|
|
channelsMvcc: channelsMvcc,
|
|
fastSkip: true,
|
|
reQuery: true,
|
|
}
|
|
queryResult, err := t.node.(*Proxy).query(t.ctx, qt, span)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if queryResult.GetStatus().GetErrorCode() != commonpb.ErrorCode_Success {
|
|
return merr.Error(queryResult.GetStatus())
|
|
}
|
|
// Reorganize Results. The order of query result ids will be altered and differ from queried ids.
|
|
// We should reorganize query results to keep the order of original queried ids. For example:
|
|
// ===========================================
|
|
// 3 2 5 4 1 (query ids)
|
|
// ||
|
|
// || (query)
|
|
// \/
|
|
// 4 3 5 1 2 (result ids)
|
|
// v4 v3 v5 v1 v2 (result vectors)
|
|
// ||
|
|
// || (reorganize)
|
|
// \/
|
|
// 3 2 5 4 1 (result ids)
|
|
// v3 v2 v5 v4 v1 (result vectors)
|
|
// ===========================================
|
|
_, sp := otel.Tracer(typeutil.ProxyRole).Start(t.ctx, "reorganizeRequeryResults")
|
|
defer sp.End()
|
|
pkFieldData, err := typeutil.GetPrimaryFieldData(queryResult.GetFieldsData(), pkField)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
offsets := make(map[any]int)
|
|
for i := 0; i < typeutil.GetPKSize(pkFieldData); i++ {
|
|
pk := typeutil.GetData(pkFieldData, i)
|
|
offsets[pk] = i
|
|
}
|
|
|
|
t.result.Results.FieldsData = make([]*schemapb.FieldData, len(queryResult.GetFieldsData()))
|
|
for i := 0; i < typeutil.GetSizeOfIDs(ids); i++ {
|
|
id := typeutil.GetPK(ids, int64(i))
|
|
if _, ok := offsets[id]; !ok {
|
|
return merr.WrapErrInconsistentRequery(fmt.Sprintf("incomplete query result, missing id %s, len(searchIDs) = %d, len(queryIDs) = %d, collection=%d",
|
|
id, typeutil.GetSizeOfIDs(ids), len(offsets), t.GetCollectionID()))
|
|
}
|
|
typeutil.AppendFieldData(t.result.Results.FieldsData, queryResult.GetFieldsData(), int64(offsets[id]))
|
|
}
|
|
|
|
t.result.Results.FieldsData = lo.Filter(t.result.Results.FieldsData, func(fieldData *schemapb.FieldData, i int) bool {
|
|
return lo.Contains(t.request.GetOutputFields(), fieldData.GetFieldName())
|
|
})
|
|
return nil
|
|
}
|
|
|
|
func (t *searchTask) fillInFieldInfo() {
|
|
if len(t.request.OutputFields) != 0 && len(t.result.Results.FieldsData) != 0 {
|
|
for i, name := range t.request.OutputFields {
|
|
for _, field := range t.schema.Fields {
|
|
if t.result.Results.FieldsData[i] != nil && field.Name == name {
|
|
t.result.Results.FieldsData[i].FieldName = field.Name
|
|
t.result.Results.FieldsData[i].FieldId = field.FieldID
|
|
t.result.Results.FieldsData[i].Type = field.DataType
|
|
t.result.Results.FieldsData[i].IsDynamic = field.IsDynamic
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func (t *searchTask) collectSearchResults(ctx context.Context) ([]*internalpb.SearchResults, error) {
|
|
select {
|
|
case <-t.TraceCtx().Done():
|
|
log.Ctx(ctx).Warn("search task wait to finish timeout!")
|
|
return nil, fmt.Errorf("search task wait to finish timeout, msgID=%d", t.ID())
|
|
default:
|
|
toReduceResults := make([]*internalpb.SearchResults, 0)
|
|
log.Ctx(ctx).Debug("all searches are finished or canceled")
|
|
t.resultBuf.Range(func(res *internalpb.SearchResults) bool {
|
|
toReduceResults = append(toReduceResults, res)
|
|
log.Ctx(ctx).Debug("proxy receives one search result",
|
|
zap.Int64("sourceID", res.GetBase().GetSourceID()))
|
|
return true
|
|
})
|
|
return toReduceResults, nil
|
|
}
|
|
}
|
|
|
|
func decodeSearchResults(ctx context.Context, searchResults []*internalpb.SearchResults) ([]*schemapb.SearchResultData, error) {
|
|
ctx, sp := otel.Tracer(typeutil.ProxyRole).Start(ctx, "decodeSearchResults")
|
|
defer sp.End()
|
|
tr := timerecord.NewTimeRecorder("decodeSearchResults")
|
|
results := make([]*schemapb.SearchResultData, 0)
|
|
for _, partialSearchResult := range searchResults {
|
|
if partialSearchResult.SlicedBlob == nil {
|
|
continue
|
|
}
|
|
|
|
var partialResultData schemapb.SearchResultData
|
|
err := proto.Unmarshal(partialSearchResult.SlicedBlob, &partialResultData)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
results = append(results, &partialResultData)
|
|
}
|
|
tr.CtxElapse(ctx, "decodeSearchResults done")
|
|
return results, nil
|
|
}
|
|
|
|
func checkSearchResultData(data *schemapb.SearchResultData, nq int64, topk int64, pkHitNum int) error {
|
|
if data.NumQueries != nq {
|
|
return fmt.Errorf("search result's nq(%d) mis-match with %d", data.NumQueries, nq)
|
|
}
|
|
if data.TopK != topk {
|
|
return fmt.Errorf("search result's topk(%d) mis-match with %d", data.TopK, topk)
|
|
}
|
|
|
|
if len(data.Scores) != pkHitNum {
|
|
return fmt.Errorf("search result's score length invalid, score length=%d, expectedLength=%d",
|
|
len(data.Scores), pkHitNum)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func selectHighestScoreIndex(subSearchResultData []*schemapb.SearchResultData, subSearchNqOffset [][]int64, cursors []int64, qi int64) (int, int64) {
|
|
var (
|
|
subSearchIdx = -1
|
|
resultDataIdx int64 = -1
|
|
)
|
|
maxScore := minFloat32
|
|
for i := range cursors {
|
|
if cursors[i] >= subSearchResultData[i].Topks[qi] {
|
|
continue
|
|
}
|
|
sIdx := subSearchNqOffset[i][qi] + cursors[i]
|
|
sScore := subSearchResultData[i].Scores[sIdx]
|
|
|
|
// Choose the larger score idx or the smaller pk idx with the same score
|
|
if subSearchIdx == -1 || sScore > maxScore {
|
|
subSearchIdx = i
|
|
resultDataIdx = sIdx
|
|
maxScore = sScore
|
|
} else if sScore == maxScore {
|
|
if subSearchIdx == -1 {
|
|
// A bad case happens where Knowhere returns distance/score == +/-maxFloat32
|
|
// by mistake.
|
|
log.Error("a bad score is returned, something is wrong here!", zap.Float32("score", sScore))
|
|
} else if typeutil.ComparePK(
|
|
typeutil.GetPK(subSearchResultData[i].GetIds(), sIdx),
|
|
typeutil.GetPK(subSearchResultData[subSearchIdx].GetIds(), resultDataIdx)) {
|
|
subSearchIdx = i
|
|
resultDataIdx = sIdx
|
|
maxScore = sScore
|
|
}
|
|
}
|
|
}
|
|
return subSearchIdx, resultDataIdx
|
|
}
|
|
|
|
func (t *searchTask) TraceCtx() context.Context {
|
|
return t.ctx
|
|
}
|
|
|
|
func (t *searchTask) ID() UniqueID {
|
|
return t.Base.MsgID
|
|
}
|
|
|
|
func (t *searchTask) SetID(uid UniqueID) {
|
|
t.Base.MsgID = uid
|
|
}
|
|
|
|
func (t *searchTask) Name() string {
|
|
return SearchTaskName
|
|
}
|
|
|
|
func (t *searchTask) Type() commonpb.MsgType {
|
|
return t.Base.MsgType
|
|
}
|
|
|
|
func (t *searchTask) BeginTs() Timestamp {
|
|
return t.Base.Timestamp
|
|
}
|
|
|
|
func (t *searchTask) EndTs() Timestamp {
|
|
return t.Base.Timestamp
|
|
}
|
|
|
|
func (t *searchTask) SetTs(ts Timestamp) {
|
|
t.Base.Timestamp = ts
|
|
}
|
|
|
|
func (t *searchTask) OnEnqueue() error {
|
|
t.Base = commonpbutil.NewMsgBase()
|
|
t.Base.MsgType = commonpb.MsgType_Search
|
|
t.Base.SourceID = paramtable.GetNodeID()
|
|
return nil
|
|
}
|