-
Notifications
You must be signed in to change notification settings - Fork 153
/
tables.go
209 lines (175 loc) · 4.96 KB
/
tables.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
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
package gen
import (
"context"
"github.com/influxdata/flux"
"github.com/influxdata/flux/codes"
"github.com/influxdata/flux/execute"
"github.com/influxdata/flux/internal/errors"
"github.com/influxdata/flux/internal/gen"
"github.com/influxdata/flux/memory"
"github.com/influxdata/flux/plan"
"github.com/influxdata/flux/runtime"
"github.com/influxdata/flux/semantic"
"github.com/influxdata/flux/values"
)
const TablesKind = "internal/gen.tables"
type Tag struct {
Name string `json:"name"`
Cardinality int `json:"cardinality"`
}
type TablesOpSpec struct {
N int `json:"n"`
Tags []Tag `json:"tags,omitempty"`
Nulls float64 `json:"nulls,omitempty"`
}
func init() {
tablesSignature := runtime.MustLookupBuiltinType("internal/gen", "tables")
runtime.RegisterPackageValue("internal/gen", "tables", flux.MustValue(flux.FunctionValue(TablesKind, createTablesOpSpec, tablesSignature)))
flux.RegisterOpSpec(TablesKind, newTablesOp)
plan.RegisterProcedureSpec(TablesKind, newTablesProcedure, TablesKind)
execute.RegisterSource(TablesKind, createTablesSource)
}
func createTablesOpSpec(args flux.Arguments, a *flux.Administration) (flux.OperationSpec, error) {
spec := new(TablesOpSpec)
if n, err := args.GetRequiredInt("n"); err != nil {
return nil, err
} else {
spec.N = int(n)
}
if tags, ok := args.Get("tags"); ok {
if nature := tags.Type().Nature(); nature != semantic.Array {
return nil, errors.Newf(codes.Invalid, "expected array for %q, got %s", "tags", nature)
}
var err error
tags.Array().Range(func(i int, v values.Value) {
if err != nil {
return
}
if v.Type().Nature() != semantic.Object {
err = errors.Newf(codes.Invalid, "tag at index %d must be an object", i)
return
}
var tag Tag
if v, ok := v.Object().Get("name"); !ok {
err = errors.Newf(codes.Invalid, "missing %q parameter in tag at index %d", "name", i)
return
} else if v.Type().Nature() != semantic.String {
err = errors.Newf(codes.Invalid, "expected string for %q at index %d, got %s", "name", i, v.Type())
return
} else {
tag.Name = v.Str()
}
if v, ok := v.Object().Get("cardinality"); !ok {
err = errors.Newf(codes.Invalid, "missing %q parameter in tag at index %d", "cardinality", i)
return
} else if v.Type().Nature() != semantic.Int {
err = errors.Newf(codes.Invalid, "expected int for %q at index %d, got %s", "cardinality", i, v.Type())
return
} else {
tag.Cardinality = int(v.Int())
}
spec.Tags = append(spec.Tags, tag)
})
}
if nulls, ok, err := args.GetFloat("nulls"); err != nil {
return nil, err
} else if ok {
spec.Nulls = nulls
}
return spec, nil
}
func newTablesOp() flux.OperationSpec {
return new(TablesOpSpec)
}
func (s *TablesOpSpec) Kind() flux.OperationKind {
return TablesKind
}
type TablesProcedureSpec struct {
plan.DefaultCost
Schema gen.Schema
}
func newTablesProcedure(qs flux.OperationSpec, pa plan.Administration) (plan.ProcedureSpec, error) {
spec, ok := qs.(*TablesOpSpec)
if !ok {
return nil, errors.Newf(codes.Internal, "invalid spec type %T", qs)
}
schema := gen.Schema{
NumPoints: spec.N,
Nulls: spec.Nulls,
}
if len(spec.Tags) > 0 {
schema.Tags = make([]gen.Tag, len(spec.Tags))
for i, tag := range spec.Tags {
schema.Tags[i] = gen.Tag{
Name: tag.Name,
Cardinality: tag.Cardinality,
}
}
}
return &TablesProcedureSpec{Schema: schema}, nil
}
func (s *TablesProcedureSpec) Kind() plan.ProcedureKind {
return TablesKind
}
func (s *TablesProcedureSpec) Copy() plan.ProcedureSpec {
ns := new(TablesProcedureSpec)
return ns
}
func createTablesSource(prSpec plan.ProcedureSpec, dsid execute.DatasetID, a execute.Administration) (execute.Source, error) {
spec, ok := prSpec.(*TablesProcedureSpec)
if !ok {
return nil, errors.Newf(codes.Internal, "invalid spec type %T", prSpec)
}
return &Source{
id: dsid,
schema: spec.Schema,
alloc: a.Allocator(),
}, nil
}
type Source struct {
id execute.DatasetID
ts []execute.Transformation
schema gen.Schema
alloc *memory.Allocator
}
func (s *Source) AddTransformation(t execute.Transformation) {
s.ts = append(s.ts, t)
}
func (s *Source) Run(ctx context.Context) {
schema := s.schema
schema.Alloc = s.alloc
tables, err := gen.Input(ctx, schema)
if err != nil {
for _, t := range s.ts {
t.Finish(s.id, err)
}
return
}
err = tables.Do(func(table flux.Table) error {
return s.processTable(ctx, table)
})
for _, t := range s.ts {
t.Finish(s.id, err)
}
}
func (s *Source) processTable(ctx context.Context, tbl flux.Table) error {
if len(s.ts) == 0 {
tbl.Done()
return nil
} else if len(s.ts) == 1 {
return s.ts[0].Process(s.id, tbl)
}
// There is more than one transformation so we need to
// copy the table for each transformation.
bufTable, err := execute.CopyTable(tbl)
if err != nil {
return err
}
defer bufTable.Done()
for _, t := range s.ts {
if err := t.Process(s.id, bufTable.Copy()); err != nil {
return err
}
}
return nil
}