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stage.go
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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 flow
// Stage is the definition of query stage
type Stage int
const (
FilteringStage Stage = iota + 1
GroupingStage
ScannerStage
DownSamplingStage
)
// String returns string value of stage.
func (qs Stage) String() string {
switch qs {
case FilteringStage:
return "filtering"
case GroupingStage:
return "grouping"
case ScannerStage:
return "scanner"
case DownSamplingStage:
return "downSampling"
default:
return "unknown"
}
}