github.com/matrixorigin/matrixone@v1.2.0/pkg/util/executor/result.go (about)

     1  // Copyright 2023 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 executor
    16  
    17  import (
    18  	"github.com/matrixorigin/matrixone/pkg/container/vector"
    19  )
    20  
    21  func (res Result) Close() {
    22  	for _, rows := range res.Batches {
    23  		rows.Clean(res.mp)
    24  	}
    25  }
    26  
    27  // ReadRows read all rows, apply is used to read cols data in a row. If apply return
    28  // false, stop reading. If the query has a lot of data, apply will be called multiple times, giving
    29  // a batch of rows for each call.
    30  func (res Result) ReadRows(apply func(rows int, cols []*vector.Vector) bool) {
    31  	for _, rows := range res.Batches {
    32  		if !apply(rows.RowCount(), rows.Vecs) {
    33  			return
    34  		}
    35  	}
    36  }
    37  
    38  // GetFixedRows get fixed rows, int, float, etc.
    39  func GetFixedRows[T any](vec *vector.Vector) []T {
    40  	return vector.MustFixedCol[T](vec)
    41  }
    42  
    43  // GetBytesRows get bytes rows, varchar, varbinary, text, json, etc.
    44  func GetBytesRows(vec *vector.Vector) [][]byte {
    45  	n := vec.Length()
    46  	data, area := vector.MustVarlenaRawData(vec)
    47  	rows := make([][]byte, 0, n)
    48  	for idx := range data {
    49  		rows = append(rows, data[idx].GetByteSlice(area))
    50  	}
    51  	return rows
    52  }
    53  
    54  // GetStringRows get bytes rows, varchar, varbinary, text, json, etc.
    55  func GetStringRows(vec *vector.Vector) []string {
    56  	n := vec.Length()
    57  	data, area := vector.MustVarlenaRawData(vec)
    58  	rows := make([]string, 0, n)
    59  	for idx := range data {
    60  		rows = append(rows, string(data[idx].GetByteSlice(area)))
    61  	}
    62  	return rows
    63  }