github.com/matrixorigin/matrixone@v0.7.0/pkg/sql/plan/function/operator/logical.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 operator
    16  
    17  import (
    18  	"github.com/matrixorigin/matrixone/pkg/container/nulls"
    19  	"github.com/matrixorigin/matrixone/pkg/container/vector"
    20  	"github.com/matrixorigin/matrixone/pkg/vectorize/logical"
    21  	"github.com/matrixorigin/matrixone/pkg/vm/process"
    22  )
    23  
    24  type logicFn func(v1, v2, r *vector.Vector) error
    25  
    26  type logicType int8
    27  
    28  const (
    29  	AND logicType = 0
    30  	OR  logicType = 1
    31  	XOR logicType = 2
    32  )
    33  
    34  func Logic(vectors []*vector.Vector, proc *process.Process, cfn logicFn, op logicType) (*vector.Vector, error) {
    35  	left, right := vectors[0], vectors[1]
    36  	if left.IsScalarNull() || right.IsScalarNull() {
    37  		if op == AND {
    38  			return HandleAndNullCol(vectors, proc)
    39  		}
    40  
    41  		if op == OR {
    42  			return HandleOrNullCol(vectors, proc)
    43  		}
    44  
    45  		if op == XOR {
    46  			if left.IsScalarNull() {
    47  				return proc.AllocConstNullVector(boolType, vector.Length(right)), nil
    48  			} else {
    49  				return proc.AllocConstNullVector(boolType, vector.Length(left)), nil
    50  			}
    51  		}
    52  	}
    53  
    54  	if left.IsScalar() && right.IsScalar() {
    55  		vec := proc.AllocScalarVector(boolType)
    56  		if err := cfn(left, right, vec); err != nil {
    57  			return nil, err
    58  		}
    59  		return vec, nil
    60  	}
    61  
    62  	length := vector.Length(left)
    63  	if left.IsScalar() {
    64  		length = vector.Length(right)
    65  	}
    66  	resultVector := allocateBoolVector(length, proc)
    67  	nulls.Or(left.Nsp, right.Nsp, resultVector.Nsp)
    68  
    69  	if err := cfn(left, right, resultVector); err != nil {
    70  		return nil, err
    71  	}
    72  	return resultVector, nil
    73  }
    74  
    75  func LogicAnd(args []*vector.Vector, proc *process.Process) (*vector.Vector, error) {
    76  	return Logic(args, proc, logical.And, AND)
    77  }
    78  
    79  func LogicOr(args []*vector.Vector, proc *process.Process) (*vector.Vector, error) {
    80  	return Logic(args, proc, logical.Or, OR)
    81  }
    82  
    83  func LogicXor(args []*vector.Vector, proc *process.Process) (*vector.Vector, error) {
    84  	return Logic(args, proc, logical.Xor, XOR)
    85  }
    86  
    87  func LogicNot(vs []*vector.Vector, proc *process.Process) (*vector.Vector, error) {
    88  	v1 := vs[0]
    89  	if v1.IsScalarNull() {
    90  		return proc.AllocScalarNullVector(boolType), nil
    91  	}
    92  	if v1.IsScalar() {
    93  		vec := proc.AllocScalarVector(boolType)
    94  		if err := logical.Not(v1, vec); err != nil {
    95  			return nil, err
    96  		}
    97  		return vec, nil
    98  	}
    99  	length := vector.Length(v1)
   100  	vec := allocateBoolVector(length, proc)
   101  	nulls.Or(v1.Nsp, nil, vec.Nsp)
   102  	if err := logical.Not(v1, vec); err != nil {
   103  		return nil, err
   104  	}
   105  	return vec, nil
   106  }