github.com/matrixorigin/matrixone@v0.7.0/pkg/sql/plan/function/builtin/multi/uuid.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/google/uuid"
    19  	"github.com/matrixorigin/matrixone/pkg/common/moerr"
    20  	"github.com/matrixorigin/matrixone/pkg/container/types"
    21  	"github.com/matrixorigin/matrixone/pkg/container/vector"
    22  	"github.com/matrixorigin/matrixone/pkg/vm/process"
    23  )
    24  
    25  const UUID_LENGTH uint32 = 36
    26  
    27  func UUID(inputVecs []*vector.Vector, proc *process.Process) (*vector.Vector, error) {
    28  	if len(inputVecs) != 1 {
    29  		return nil, moerr.NewInvalidArg(proc.Ctx, "uuid function num args", len(inputVecs))
    30  	}
    31  	rows := inputVecs[0].Length()
    32  	results := make([]string, rows)
    33  	for i := 0; i < rows; i++ {
    34  		id, err := uuid.NewUUID()
    35  		if err != nil {
    36  			return nil, moerr.NewInternalError(proc.Ctx, "newuuid failed")
    37  		}
    38  		results[i] = id.String()
    39  	}
    40  	resultVector := vector.NewWithStrings(types.T_varchar.ToType(), results, nil, proc.Mp())
    41  	return resultVector, nil
    42  }