/
row_number.go
44 lines (39 loc) · 1.41 KB
/
row_number.go
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// Copyright 2021 - 2022 Matrix Origin
//
// Licensed 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 functionAgg
import (
"github.com/matrixorigin/matrixone/pkg/container/types"
"github.com/matrixorigin/matrixone/pkg/sql/colexec/agg"
)
var (
// row_number() supported input type and output type.
WinRowNumberReturnType = func(typs []types.Type) types.Type {
return types.T_int64.ToType()
}
)
func NewWinRowNumber(overloadID int64, dist bool, inputTypes []types.Type, outputType types.Type, _ any) (agg.Agg[any], error) {
winPriv := &sWindowBase{}
return agg.NewUnaryAgg(overloadID, winPriv, false, inputTypes[0], outputType, winPriv.Grows, winPriv.EvalRowNumber, winPriv.Merge, winPriv.Fill), nil
}
func (s *sWindowBase) EvalRowNumber(result []int64) ([]int64, error) {
idx := 0
for _, p := range s.ps {
n := p[len(p)-1] - p[0]
for i := int64(1); i <= n; i++ {
result[idx] = i
idx++
}
}
return result, nil
}