github.com/matrixorigin/matrixone@v0.7.0/pkg/sql/plan/function/builtin/binary/timediff.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 binary
    16  
    17  import (
    18  	"github.com/matrixorigin/matrixone/pkg/container/nulls"
    19  	"github.com/matrixorigin/matrixone/pkg/container/types"
    20  	"github.com/matrixorigin/matrixone/pkg/container/vector"
    21  	"github.com/matrixorigin/matrixone/pkg/vectorize/timediff"
    22  	"github.com/matrixorigin/matrixone/pkg/vm/process"
    23  )
    24  
    25  func TimeDiff[T timediff.DiffT](vectors []*vector.Vector, proc *process.Process) (*vector.Vector, error) {
    26  	//input vectors
    27  	firstVector := vectors[0]
    28  	secondVector := vectors[1]
    29  	firstValues := vector.MustTCols[T](firstVector)
    30  	secondValues := vector.MustTCols[T](secondVector)
    31  	resultType := types.T_time.ToType()
    32  
    33  	resultPrecision := firstVector.Typ.Precision
    34  	if firstVector.Typ.Precision < secondVector.Typ.Precision {
    35  		resultPrecision = secondVector.Typ.Precision
    36  	}
    37  	resultType.Precision = resultPrecision
    38  
    39  	if firstVector.IsScalarNull() || secondVector.IsScalarNull() {
    40  		return proc.AllocScalarNullVector(resultType), nil
    41  	}
    42  
    43  	vectorLen := len(firstValues)
    44  	if firstVector.IsScalar() {
    45  		vectorLen = len(secondValues)
    46  	}
    47  
    48  	resultVector, err := proc.AllocVectorOfRows(resultType, int64(vectorLen), nil)
    49  	if err != nil {
    50  		return nil, err
    51  	}
    52  
    53  	rs := vector.MustTCols[types.Time](resultVector)
    54  	nulls.Or(firstVector.Nsp, secondVector.Nsp, resultVector.Nsp)
    55  	if err = timediff.TimeDiffWithTimeFn(firstValues, secondValues, rs); err != nil {
    56  		return nil, err
    57  	}
    58  	return resultVector, nil
    59  }