github.com/matrixorigin/matrixone@v0.7.0/pkg/sql/plan/function/builtin/multi/substr_index.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  	"math"
    19  
    20  	"github.com/matrixorigin/matrixone/pkg/container/nulls"
    21  	"github.com/matrixorigin/matrixone/pkg/container/types"
    22  	"github.com/matrixorigin/matrixone/pkg/container/vector"
    23  	substrindex "github.com/matrixorigin/matrixone/pkg/vectorize/subStrIndex"
    24  	"github.com/matrixorigin/matrixone/pkg/vm/process"
    25  )
    26  
    27  func SubStrIndex(vecs []*vector.Vector, proc *process.Process) (*vector.Vector, error) {
    28  	if vecs[0].IsScalarNull() || vecs[1].IsScalarNull() || vecs[2].IsScalarNull() {
    29  		return proc.AllocScalarNullVector(vecs[0].Typ), nil
    30  	}
    31  	//get the first arg str
    32  	sourceCols := vector.MustStrCols(vecs[0])
    33  	//get the second arg delim
    34  	delimCols := vector.MustStrCols(vecs[1])
    35  	//get the third arg count
    36  	countCols := getCount(vecs[2])
    37  
    38  	//calcute rows
    39  	rowCount := vector.Length(vecs[0])
    40  
    41  	var resultVec *vector.Vector = nil
    42  	resultValues := make([]string, rowCount)
    43  	resultNsp := nulls.NewWithSize(rowCount)
    44  
    45  	// set null row
    46  	nulls.Or(vecs[0].Nsp, vecs[1].Nsp, resultNsp)
    47  	nulls.Or(vecs[2].Nsp, resultNsp, resultNsp)
    48  
    49  	constVectors := []bool{vecs[0].IsScalar(), vecs[1].IsScalar(), vecs[2].IsScalar()}
    50  	//get result values
    51  	substrindex.SubStrIndex(sourceCols, delimCols, countCols, rowCount, constVectors, resultValues)
    52  	resultVec = vector.NewWithStrings(types.T_varchar.ToType(), resultValues, resultNsp, proc.Mp())
    53  
    54  	return resultVec, nil
    55  }
    56  
    57  func getCount(vec *vector.Vector) []int64 {
    58  	switch vec.GetType().Oid {
    59  	case types.T_float64:
    60  		vs := vector.MustTCols[float64](vec)
    61  		res := make([]int64, 0, len(vs))
    62  		for _, v := range vs {
    63  			if v > float64(math.MaxInt64) {
    64  				res = append(res, math.MaxInt64)
    65  			} else if v < float64(math.MinInt64) {
    66  				res = append(res, math.MinInt64)
    67  			} else {
    68  				res = append(res, int64(v))
    69  			}
    70  		}
    71  		return res
    72  	case types.T_uint64:
    73  		vs := vector.MustTCols[uint64](vec)
    74  		res := make([]int64, 0, len(vs))
    75  		for _, v := range vs {
    76  			if v > uint64(math.MaxInt64) {
    77  				res = append(res, math.MaxInt64)
    78  			} else {
    79  				res = append(res, int64(v))
    80  			}
    81  		}
    82  		return res
    83  	default:
    84  		return castTVecAsInt64(vec)
    85  	}
    86  }