github.com/matrixorigin/matrixone@v0.7.0/pkg/sql/colexec/output/output.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 output
    16  
    17  import (
    18  	"bytes"
    19  
    20  	"github.com/matrixorigin/matrixone/pkg/vm/process"
    21  )
    22  
    23  func String(arg any, buf *bytes.Buffer) {
    24  	buf.WriteString("sql output")
    25  }
    26  
    27  func Prepare(_ *process.Process, _ any) error {
    28  	return nil
    29  }
    30  
    31  func Call(_ int, proc *process.Process, arg any, isFirst bool, isLast bool) (bool, error) {
    32  	ap := arg.(*Argument)
    33  	if bat := proc.Reg.InputBatch; bat != nil && len(bat.Zs) > 0 {
    34  		for i := range bat.Zs {
    35  			bat.Zs[i] = 1
    36  		}
    37  		if err := ap.Func(ap.Data, bat); err != nil {
    38  			bat.Clean(proc.Mp())
    39  			return true, err
    40  		}
    41  		bat.Clean(proc.Mp())
    42  	}
    43  
    44  	return false, nil
    45  }