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

     1  // Copyright 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/regular"
    21  	"github.com/matrixorigin/matrixone/pkg/vm/process"
    22  )
    23  
    24  func Replace(vectors []*vector.Vector, proc *process.Process) (*vector.Vector, error) {
    25  	firstVector := vectors[0]
    26  	secondVector := vectors[1]
    27  	thirdVector := vectors[2]
    28  	firstValues := vector.MustStrCols(firstVector)
    29  	secondValues := vector.MustStrCols(secondVector)
    30  	thirdValues := vector.MustStrCols(thirdVector)
    31  	resultType := types.T_varchar.ToType()
    32  
    33  	//maxLen
    34  	maxLen := vector.Length(vectors[0])
    35  	for i := range vectors {
    36  		val := vector.Length(vectors[i])
    37  		if val > maxLen {
    38  			maxLen = val
    39  		}
    40  	}
    41  
    42  	if firstVector.IsScalarNull() || secondVector.IsScalarNull() || thirdVector.IsScalarNull() {
    43  		return proc.AllocScalarNullVector(resultType), nil
    44  	}
    45  
    46  	resultVector, err := proc.AllocVectorOfRows(resultType, 0, nil)
    47  	if err != nil {
    48  		return nil, err
    49  	}
    50  	err = regular.ReplaceWithArrays(firstValues, secondValues, thirdValues, firstVector.Nsp, secondVector.Nsp, thirdVector.Nsp, resultVector, proc, maxLen)
    51  	if err != nil {
    52  		return nil, err
    53  	}
    54  
    55  	return resultVector, nil
    56  }