github.com/matrixorigin/matrixone@v0.7.0/pkg/sql/plan/function/builtin/unary/current_date.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 unary
    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/logutil"
    21  	"github.com/matrixorigin/matrixone/pkg/vm/process"
    22  	"time"
    23  )
    24  
    25  func CurrentDate(_ []*vector.Vector, proc *process.Process) (resultVec *vector.Vector, err error) {
    26  	defer func() {
    27  		if err != nil && resultVec != nil {
    28  			resultVec.Free(proc.Mp())
    29  		}
    30  	}()
    31  	resultType := types.T_date.ToType()
    32  	resultVec = proc.AllocScalarVector(resultType)
    33  	loc := proc.SessionInfo.TimeZone
    34  	if loc == nil {
    35  		logutil.Warn("missing timezone in session info")
    36  		loc = time.Local
    37  	}
    38  	resultSlice := vector.MustTCols[types.Date](resultVec)
    39  	ts := types.UnixNanoToTimestamp(proc.UnixTime)
    40  	dateTimes := make([]types.Datetime, 1)
    41  	dateTimes, err = types.TimestampToDatetime(loc, []types.Timestamp{ts}, dateTimes)
    42  	if err != nil {
    43  		return
    44  	}
    45  	resultSlice[0] = dateTimes[0].ToDate()
    46  	return
    47  }