github.com/matrixorigin/matrixone@v0.7.0/pkg/sql/colexec/connector/connector.go (about)

     1  // Copyright 2021 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 connector
    16  
    17  import (
    18  	"bytes"
    19  
    20  	"github.com/matrixorigin/matrixone/pkg/container/vector"
    21  	"github.com/matrixorigin/matrixone/pkg/vm/process"
    22  )
    23  
    24  func String(arg any, buf *bytes.Buffer) {
    25  	buf.WriteString("pipe connector")
    26  }
    27  
    28  func Prepare(_ *process.Process, _ any) error {
    29  	return nil
    30  }
    31  
    32  func Call(_ int, proc *process.Process, arg any, _ bool, _ bool) (bool, error) {
    33  	ap := arg.(*Argument)
    34  	reg := ap.Reg
    35  	bat := proc.InputBatch()
    36  	if bat == nil {
    37  		return true, nil
    38  	}
    39  	if bat.Length() == 0 {
    40  		return false, nil
    41  	}
    42  
    43  	// do not send the source batch to remote node.
    44  	for i := range bat.Vecs {
    45  		if bat.Vecs[i].IsOriginal() {
    46  			vec, err := vector.Dup(bat.Vecs[i], proc.Mp())
    47  			if err != nil {
    48  				return false, err
    49  			}
    50  			bat.Vecs[i].Free(proc.Mp())
    51  			bat.Vecs[i] = vec
    52  		}
    53  	}
    54  
    55  	select {
    56  	case <-reg.Ctx.Done():
    57  		bat.Clean(proc.Mp())
    58  		return true, nil
    59  	case reg.Ch <- bat:
    60  		proc.SetInputBatch(nil)
    61  		return false, nil
    62  	}
    63  }