github.com/matrixorigin/matrixone@v1.2.0/pkg/vectorize/shuffle/shuffle.go (about)

     1  // Copyright 2021 Matrix Origin
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package shuffle
    16  
    17  import (
    18  	"github.com/matrixorigin/matrixone/pkg/container/types"
    19  )
    20  
    21  func FixedLengthShuffle[T types.FixedSizeT](vs, ws []T, sels []int64) []T {
    22  	for i, sel := range sels {
    23  		ws[i] = vs[sel]
    24  	}
    25  	return ws[:len(sels)]
    26  }
    27  
    28  func TupleShuffle(vs, ws [][]interface{}, sels []int64) [][]interface{} {
    29  	for i, sel := range sels {
    30  		ws[i] = vs[sel]
    31  	}
    32  	return ws[:len(sels)]
    33  }