forked from minio/minio
/
data.go
65 lines (54 loc) · 1.65 KB
/
data.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
/*
* Minio Cloud Storage, (C) 2019 Minio, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package data
import (
"github.com/as-polyakov/minio/pkg/s3select/internal/parquet-go/gen-go/parquet"
)
// ColumnChunk ...
type ColumnChunk struct {
parquet.ColumnChunk
isDictPage bool
dictPageLen int64
dataPageLen int64
dataLen int64
data []byte
}
// Data returns the data.
func (chunk *ColumnChunk) Data() []byte {
return chunk.data
}
// DataLen returns the length of the data.
func (chunk *ColumnChunk) DataLen() int64 {
return chunk.dataLen
}
// NewRowGroup creates a new row group.
func NewRowGroup(chunks []*ColumnChunk, numRows, offset int64) *parquet.RowGroup {
rows := parquet.NewRowGroup()
rows.NumRows = numRows
for _, chunk := range chunks {
rows.Columns = append(rows.Columns, &chunk.ColumnChunk)
rows.TotalByteSize += chunk.dataLen
chunk.ColumnChunk.FileOffset = offset
if chunk.isDictPage {
dictPageOffset := offset
chunk.ColumnChunk.MetaData.DictionaryPageOffset = &dictPageOffset
offset += chunk.dictPageLen
}
chunk.ColumnChunk.MetaData.DataPageOffset = offset
offset += chunk.dataPageLen
}
return rows
}