/
data_load_stage.go
76 lines (68 loc) · 2.82 KB
/
data_load_stage.go
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// Licensed to LinDB under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. LinDB licenses this file to you under
// the Apache License, Version 2.0 (the "License"); you may
// not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the License for the
// specific language governing permissions and limitations
// under the License.
package stage
import (
"fmt"
"github.com/lindb/lindb/flow"
"github.com/lindb/lindb/pkg/timeutil"
"github.com/lindb/lindb/query/context"
"github.com/lindb/lindb/query/operator"
)
// dataLoadStage represents data load stage.
type dataLoadStage struct {
baseStage
leafExecuteCtx *context.LeafExecuteContext
executeCtx *flow.DataLoadContext
segmentRS *flow.TimeSegmentResultSet
}
// NewDataLoadStage creates a dataLoadStage instance.
func NewDataLoadStage(leafExecuteCtx *context.LeafExecuteContext,
executeCtx *flow.DataLoadContext, segmentRS *flow.TimeSegmentResultSet,
) Stage {
return &dataLoadStage{
baseStage: baseStage{
ctx: leafExecuteCtx.TaskCtx.Ctx,
execPool: leafExecuteCtx.Database.ExecutorPool().Scanner,
stageType: DataLoad,
},
leafExecuteCtx: leafExecuteCtx,
executeCtx: executeCtx,
segmentRS: segmentRS,
}
}
// Plan returns sub execution plan tree for data load.
func (stage *dataLoadStage) Plan() PlanNode {
execPlan := NewEmptyPlanNode()
shardExecuteCtx := stage.executeCtx.ShardExecuteCtx
stage.segmentRS.IntervalRatio = uint16(shardExecuteCtx.StorageExecuteCtx.Query.IntervalRatio)
storageInterval := shardExecuteCtx.StorageExecuteCtx.Query.StorageInterval
startTimeOfQuery := shardExecuteCtx.StorageExecuteCtx.Query.TimeRange.Start
// calc base slot based on start time of query and storage's interval
stage.segmentRS.BaseSlot = int((stage.segmentRS.FamilyTime - startTimeOfQuery) / storageInterval.Int64())
stage.segmentRS.Target = shardExecuteCtx.StorageExecuteCtx.CalcSourceSlotRange(stage.segmentRS.FamilyTime)
for idx := range stage.segmentRS.FilterRS {
execPlan.AddChild(NewPlanNode(
operator.NewDataLoad(stage.executeCtx, stage.segmentRS, stage.segmentRS.FilterRS[idx])))
}
execPlan.AddChild(NewPlanNode(operator.NewLeafReduce(stage.leafExecuteCtx, stage.executeCtx)))
return execPlan
}
// Identifier returns identifier value of data load stage.
func (stage *dataLoadStage) Identifier() string {
return fmt.Sprintf("Data Load[%s]",
timeutil.FormatTimestamp(stage.segmentRS.FamilyTime, timeutil.DataTimeFormat2))
}