forked from couchbaselabs/tuqtng
-
Notifications
You must be signed in to change notification settings - Fork 0
/
simple.go
161 lines (147 loc) · 5.2 KB
/
simple.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
// Copyright (c) 2013 Couchbase, 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 simple
import (
"github.com/couchbaselabs/clog"
"github.com/couchbaselabs/tuqtng/catalog"
"github.com/couchbaselabs/tuqtng/network"
"github.com/couchbaselabs/tuqtng/plan"
"github.com/couchbaselabs/tuqtng/xpipeline"
)
type SimpleExecutablePipelineBuilder struct {
site catalog.Site
defaultPool string
}
func NewSimpleExecutablePipelineBuilder(site catalog.Site, defaultPool string) *SimpleExecutablePipelineBuilder {
return &SimpleExecutablePipelineBuilder{
site: site,
defaultPool: defaultPool,
}
}
func (this *SimpleExecutablePipelineBuilder) Build(p *plan.Plan, q network.Query) (*xpipeline.ExecutablePipeline, error) {
rv := &xpipeline.ExecutablePipeline{}
var lastOperator xpipeline.Operator = nil
currentElement := p.Root
for currentElement != nil {
var currentOperator xpipeline.Operator = nil
switch currentElement := currentElement.(type) {
case *plan.FastCount:
pool, err := this.site.PoolByName(currentElement.Pool)
if err != nil {
return nil, err
}
bucket, err := pool.BucketByName(currentElement.Bucket)
if err != nil {
return nil, err
}
var countIndex catalog.CountIndex
if currentElement.CountIndex != "" {
index, err := bucket.IndexByName(currentElement.CountIndex)
if err != nil {
return nil, err
}
countIndex = index.(catalog.CountIndex) // FIXME: need static type safety
}
currentOperator = xpipeline.NewFastCount(bucket, countIndex, currentElement.Expr, currentElement.Ranges)
case *plan.Scan:
pool, err := this.site.PoolByName(currentElement.Pool)
if err != nil {
return nil, err
}
bucket, err := pool.BucketByName(currentElement.Bucket)
if err != nil {
return nil, err
}
index, err := bucket.IndexByName(currentElement.ScanIndex)
if err != nil {
return nil, err
}
scanIndex := index.(catalog.ScanIndex) // FIXME: need static type safety
currentOperator = xpipeline.NewScan(bucket, scanIndex, currentElement.Ranges, currentElement.As)
case *plan.Fetch:
pool, err := this.site.PoolByName(currentElement.Pool)
if err != nil {
return nil, err
}
bucket, err := pool.BucketByName(currentElement.Bucket)
if err != nil {
return nil, err
}
currentOperator = xpipeline.NewFetch(bucket, currentElement.Projection, currentElement.As)
if currentElement.Ids != nil {
fetchOperator := currentOperator.(*xpipeline.Fetch)
fetchOperator.SetIds(currentElement.Ids)
}
case *plan.Filter:
currentOperator = xpipeline.NewFilter(currentElement.Expr)
case *plan.Order:
currentOperator = xpipeline.NewOrder(currentElement.Sort, currentElement.ExplicitAliases)
case *plan.Limit:
currentOperator = xpipeline.NewLimit(currentElement.Val)
case *plan.Offset:
currentOperator = xpipeline.NewOffset(currentElement.Val)
case *plan.Projector:
currentOperator = xpipeline.NewProject(currentElement.Result, currentElement.ProjectEmpty)
case *plan.DocumentJoin:
currentOperator = xpipeline.NewDocumentJoin(currentElement.Over, currentElement.As)
case *plan.EliminateDuplicates:
currentOperator = xpipeline.NewEliminateDuplicates()
case *plan.Grouper:
currentOperator = xpipeline.NewGrouper(currentElement.Group, currentElement.Aggregates)
case *plan.Explain:
currentOperator = xpipeline.NewExplain(currentElement.Input)
case *plan.CreateIndex:
pool, err := this.site.PoolByName(currentElement.Pool)
if err != nil {
return nil, err
}
bucket, err := pool.BucketByName(currentElement.Bucket)
if err != nil {
return nil, err
}
currentOperator = xpipeline.NewCreateIndex(bucket, currentElement.Name, currentElement.IndexType, currentElement.Primary, currentElement.On)
case *plan.DropIndex:
pool, err := this.site.PoolByName(currentElement.Pool)
if err != nil {
return nil, err
}
bucket, err := pool.BucketByName(currentElement.Bucket)
if err != nil {
return nil, err
}
index, err := bucket.IndexByName(currentElement.Name)
if err != nil {
return nil, err
}
currentOperator = xpipeline.NewDropIndex(index)
}
// pass reference to query
currentOperator.SetQuery(q)
//link root of xpipeline
if rv.Root == nil {
rv.Root = currentOperator
}
// link previous operator to this one
if lastOperator != nil {
lastOperator.SetSource(currentOperator)
}
// advance to next
lastOperator = currentOperator
sources := currentElement.Sources()
if len(sources) > 1 {
// FIXME future operators like JOIN will have more than one source
clog.Fatalf("multiple sources not yet supported")
} else if len(sources) == 1 {
currentElement = sources[0]
} else {
currentElement = nil
}
}
return rv, nil
}