github.com/matrixorigin/matrixone@v0.7.0/pkg/sql/plan/function/builtin/multi/pi.go (about)

     1  // Copyright 2021 - 2022 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 multi
    16  
    17  import (
    18  	"github.com/matrixorigin/matrixone/pkg/container/types"
    19  	"github.com/matrixorigin/matrixone/pkg/container/vector"
    20  	"github.com/matrixorigin/matrixone/pkg/vectorize/pi"
    21  	"github.com/matrixorigin/matrixone/pkg/vm/process"
    22  )
    23  
    24  func Pi(_ []*vector.Vector, _ *process.Process) (*vector.Vector, error) {
    25  	resultType := types.Type{Oid: types.T_float64, Size: 8}
    26  	resultVector := vector.NewConst(resultType, 1)
    27  	result := make([]float64, 1)
    28  	result[0] = pi.GetPi()
    29  	vector.SetCol(resultVector, result)
    30  	return resultVector, nil
    31  }