-
Notifications
You must be signed in to change notification settings - Fork 542
/
column.go
100 lines (85 loc) · 3.02 KB
/
column.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
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
// Licensed to ClickHouse, Inc. under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. ClickHouse, Inc. licenses this file to you 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 column
import (
"fmt"
"reflect"
"strings"
"github.com/ClickHouse/clickhouse-go/v2/lib/binary"
)
type Type string
func (t Type) params() string {
switch start, end := strings.Index(string(t), "("), strings.LastIndex(string(t), ")"); {
case len(t) == 0, start <= 0, end <= 0, end < start:
return ""
default:
return string(t[start+1 : end])
}
}
type Error struct {
ColumnType string
Err error
}
func (e *Error) Error() string {
return fmt.Sprintf("%s: %s", e.ColumnType, e.Err)
}
type ColumnConverterError struct {
Op string
Hint string
From, To string
}
func (e *ColumnConverterError) Error() string {
var hint string
if len(e.Hint) != 0 {
hint += ". " + e.Hint
}
return fmt.Sprintf("clickhouse [%s]: converting %s to %s is unsupported%s", e.Op, e.From, e.To, hint)
}
type Interface interface {
Type() Type
Rows() int
Row(i int, ptr bool) interface{}
ScanRow(dest interface{}, row int) error
Append(v interface{}) (nulls []uint8, err error)
AppendRow(v interface{}) error
Decode(decoder *binary.Decoder, rows int) error
Encode(*binary.Encoder) error
ScanType() reflect.Type
}
type CustomSerialization interface {
ReadStatePrefix(*binary.Decoder) error
WriteStatePrefix(*binary.Encoder) error
}
type UnsupportedColumnType struct {
t Type
}
func (u *UnsupportedColumnType) Type() Type { return u.t }
func (u *UnsupportedColumnType) Rows() int { return 0 }
func (u *UnsupportedColumnType) Row(int, bool) interface{} { return nil }
func (u *UnsupportedColumnType) ScanRow(interface{}, int) error { return u }
func (u *UnsupportedColumnType) Append(interface{}) ([]uint8, error) { return nil, u }
func (u *UnsupportedColumnType) AppendRow(interface{}) error { return u }
func (u *UnsupportedColumnType) Decode(*binary.Decoder, int) error { return u }
func (u *UnsupportedColumnType) Encode(*binary.Encoder) error { return u }
func (u *UnsupportedColumnType) ScanType() reflect.Type { return reflect.TypeOf(struct{}{}) }
func (u *UnsupportedColumnType) Error() string {
return fmt.Sprintf("clickhouse: unsupported column type %q", u.t)
}
var (
_ error = (*UnsupportedColumnType)(nil)
_ Interface = (*UnsupportedColumnType)(nil)
)