github.com/matrixorigin/matrixone@v0.7.0/pkg/sql/plan/function/operator/reg_match.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 operator
    16  
    17  import (
    18  	"regexp"
    19  
    20  	"github.com/matrixorigin/matrixone/pkg/common/moerr"
    21  	"github.com/matrixorigin/matrixone/pkg/container/nulls"
    22  	"github.com/matrixorigin/matrixone/pkg/container/types"
    23  	"github.com/matrixorigin/matrixone/pkg/container/vector"
    24  	"github.com/matrixorigin/matrixone/pkg/vm/process"
    25  )
    26  
    27  func RegMatch(vectors []*vector.Vector, proc *process.Process) (*vector.Vector, error) {
    28  	return generalRegMatch(vectors, proc, true)
    29  }
    30  
    31  func NotRegMatch(vectors []*vector.Vector, proc *process.Process) (*vector.Vector, error) {
    32  	return generalRegMatch(vectors, proc, false)
    33  }
    34  
    35  func generalRegMatch(vectors []*vector.Vector, proc *process.Process, isReg bool) (*vector.Vector, error) {
    36  	left, right := vectors[0], vectors[1]
    37  	resultType := types.T_bool.ToType()
    38  	leftValues, rightValues := vector.MustStrCols(left), vector.MustStrCols(right)
    39  	switch {
    40  	case left.IsScalar() && right.IsScalar():
    41  		if left.ConstVectorIsNull() || right.ConstVectorIsNull() {
    42  			return proc.AllocScalarNullVector(resultType), nil
    43  		}
    44  		resultVector := vector.NewConst(resultType, 1)
    45  		resultValues := vector.MustTCols[bool](resultVector)
    46  		err := RegMatchWithAllConst(leftValues, rightValues, resultValues, isReg)
    47  		if err != nil {
    48  			return nil, moerr.NewInvalidInput(proc.Ctx, "The Regular Expression have invalid parameter")
    49  		}
    50  		return resultVector, nil
    51  	case left.IsScalar() && !right.IsScalar():
    52  		if left.ConstVectorIsNull() {
    53  			return proc.AllocScalarNullVector(resultType), nil
    54  		}
    55  		resultVector, err := proc.AllocVectorOfRows(resultType, int64(len(rightValues)), right.Nsp)
    56  		if err != nil {
    57  			return nil, err
    58  		}
    59  		resultValues := vector.MustTCols[bool](resultVector)
    60  		err = RegMatchWithLeftConst(leftValues, rightValues, resultValues, isReg)
    61  		if err != nil {
    62  			return nil, moerr.NewInvalidInput(proc.Ctx, "The Regular Expression have invalid parameter")
    63  		}
    64  		return resultVector, nil
    65  	case !left.IsScalar() && right.IsScalar():
    66  		if right.ConstVectorIsNull() {
    67  			return proc.AllocScalarNullVector(resultType), nil
    68  		}
    69  		resultVector, err := proc.AllocVectorOfRows(resultType, int64(len(leftValues)), left.Nsp)
    70  		if err != nil {
    71  			return nil, err
    72  		}
    73  		resultValues := vector.MustTCols[bool](resultVector)
    74  		err = RegMatchWithRightConst(leftValues, rightValues, resultValues, isReg)
    75  		if err != nil {
    76  			return nil, moerr.NewInvalidInput(proc.Ctx, "The Regular Expression have invalid parameter")
    77  		}
    78  		return resultVector, nil
    79  	}
    80  	resultVector, err := proc.AllocVectorOfRows(resultType, int64(len(leftValues)), nil)
    81  	if err != nil {
    82  		return nil, err
    83  	}
    84  	resultValues := vector.MustTCols[bool](resultVector)
    85  	nulls.Or(left.Nsp, right.Nsp, resultVector.Nsp)
    86  	err = RegMatchWithALL(leftValues, rightValues, resultValues, isReg)
    87  	if err != nil {
    88  		return nil, moerr.NewInvalidInput(proc.Ctx, "The Regular Expression have invalid parameter")
    89  	}
    90  	return resultVector, nil
    91  }
    92  
    93  func RegMatchWithAllConst(lv, rv []string, rs []bool, isReg bool) error {
    94  	res, err := regexp.MatchString(rv[0], lv[0])
    95  	if err != nil {
    96  		return err
    97  	}
    98  
    99  	rs[0] = BoolResult(res, isReg)
   100  	return nil
   101  }
   102  
   103  func RegMatchWithLeftConst(lv, rv []string, rs []bool, isReg bool) error {
   104  	for i := range rv {
   105  		res, err := regexp.MatchString(rv[i], lv[0])
   106  		if err != nil {
   107  			return err
   108  		}
   109  		rs[i] = BoolResult(res, isReg)
   110  	}
   111  	return nil
   112  }
   113  
   114  func RegMatchWithRightConst(lv, rv []string, rs []bool, isReg bool) error {
   115  	for i := range lv {
   116  		res, err := regexp.MatchString(rv[0], lv[i])
   117  		if err != nil {
   118  			return err
   119  		}
   120  		rs[i] = BoolResult(res, isReg)
   121  	}
   122  	return nil
   123  }
   124  
   125  func RegMatchWithALL(lv, rv []string, rs []bool, isReg bool) error {
   126  	for i := range lv {
   127  		res, err := regexp.MatchString(rv[i], lv[i])
   128  		if err != nil {
   129  			return err
   130  		}
   131  		rs[i] = BoolResult(res, isReg)
   132  	}
   133  	return nil
   134  }
   135  
   136  func BoolResult(isMatch bool, isReg bool) bool {
   137  	return (isMatch && isReg) || !(isMatch || isReg)
   138  }