-
Notifications
You must be signed in to change notification settings - Fork 65
/
engine.go
179 lines (155 loc) 路 4.64 KB
/
engine.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
package exprpb
import (
"context"
"fmt"
"github.com/apache/arrow/go/v16/arrow"
"github.com/apache/arrow/go/v16/arrow/memory"
"go.opentelemetry.io/otel/trace"
"go.opentelemetry.io/otel/trace/noop"
pb "github.com/polarsignals/frostdb/gen/proto/go/frostdb/storage/v1alpha1"
"github.com/polarsignals/frostdb/query/logicalplan"
"github.com/polarsignals/frostdb/query/physicalplan"
)
type ProtoEngine struct {
pool memory.Allocator
tracer trace.Tracer
tableProvider logicalplan.TableProvider
execOpts []physicalplan.Option
}
type Option func(*ProtoEngine)
func WithTracer(tracer trace.Tracer) Option {
return func(e *ProtoEngine) {
e.tracer = tracer
}
}
func WithPhysicalplanOptions(opts ...physicalplan.Option) Option {
return func(e *ProtoEngine) {
e.execOpts = opts
}
}
func NewEngine(
pool memory.Allocator,
tableProvider logicalplan.TableProvider,
options ...Option,
) *ProtoEngine {
e := &ProtoEngine{
pool: pool,
tracer: noop.NewTracerProvider().Tracer(""),
tableProvider: tableProvider,
}
for _, option := range options {
option(e)
}
return e
}
type ProtoQueryBuilder struct {
pool memory.Allocator
tracer trace.Tracer
LogicalPlan *logicalplan.LogicalPlan
execOpts []physicalplan.Option
tableProvider logicalplan.TableProvider
}
func (e *ProtoEngine) FromProto(root *pb.PlanNode) (ProtoQueryBuilder, error) {
pqb := ProtoQueryBuilder{
pool: e.pool,
tracer: e.tracer,
execOpts: e.execOpts,
tableProvider: e.tableProvider,
}
builder, err := pqb.planFromProto(root)
if err != nil {
return pqb, err
}
pqb.LogicalPlan, err = builder.Build()
if err != nil {
return pqb, err
}
return pqb, nil
}
func (qb ProtoQueryBuilder) planFromProto(plan *pb.PlanNode) (logicalplan.Builder, error) {
var b logicalplan.Builder
// First convert the next plan node.
if plan.GetNext() != nil {
var err error
b, err = qb.planFromProto(plan.GetNext())
if err != nil {
return b, err
}
} else {
b = logicalplan.Builder{}
}
switch {
case plan.GetSpec().GetSchemaScan() != nil:
b = b.ScanSchema(qb.tableProvider, plan.GetSpec().GetSchemaScan().GetBase().GetTable())
case plan.GetSpec().GetTableScan() != nil:
b = b.Scan(qb.tableProvider, plan.GetSpec().GetTableScan().GetBase().GetTable())
case plan.GetSpec().GetFilter() != nil:
expr, err := ExprFromProto(plan.GetSpec().GetFilter().GetExpr())
if err != nil {
return b, fmt.Errorf("failed to convert expr from proto: %v", err)
}
b = b.Filter(expr)
case plan.GetSpec().GetDistinct() != nil:
exprs, err := ExprsFromProtos(plan.GetSpec().GetDistinct().GetExprs())
if err != nil {
return b, fmt.Errorf("failed to convert exprs from proto: %v", err)
}
b = b.Distinct(exprs...)
case plan.GetSpec().GetProjection() != nil:
exprs, err := ExprsFromProtos(plan.GetSpec().GetProjection().GetExprs())
if err != nil {
return b, fmt.Errorf("failed to convert exprs from proto: %v", err)
}
b = b.Project(exprs...)
case plan.GetSpec().GetLimit() != nil:
expr, err := ExprFromProto(plan.GetSpec().GetLimit().GetExpr())
if err != nil {
return b, fmt.Errorf("failed to convert expr from proto: %v", err)
}
b = b.Limit(expr)
case plan.GetSpec().GetAggregation() != nil:
exprs, err := ExprsFromProtos(plan.GetSpec().GetAggregation().GetAggExprs())
if err != nil {
return b, fmt.Errorf("failed to convert exprs from proto: %v", err)
}
groupExprs, err := ExprsFromProtos(plan.GetSpec().GetAggregation().GetGroupExprs())
if err != nil {
return b, fmt.Errorf("failed to convert exprs from proto: %v", err)
}
aggExprs := make([]*logicalplan.AggregationFunction, 0, len(exprs))
for _, expr := range exprs {
aggExprs = append(aggExprs, expr.(*logicalplan.AggregationFunction))
}
b.Aggregate(aggExprs, groupExprs)
}
return b, nil
}
func (qb ProtoQueryBuilder) Execute(ctx context.Context, callback func(ctx context.Context, r arrow.Record) error) error {
ctx, span := qb.tracer.Start(ctx, "ProtoEngine/Execute")
defer span.End()
phyPlan, err := qb.buildPhysical(ctx)
if err != nil {
return err
}
return phyPlan.Execute(ctx, qb.pool, callback)
}
func (qb ProtoQueryBuilder) buildPhysical(ctx context.Context) (*physicalplan.OutputPlan, error) {
for _, optimizer := range logicalplan.DefaultOptimizers() {
qb.LogicalPlan = optimizer.Optimize(qb.LogicalPlan)
}
return physicalplan.Build(
ctx,
qb.pool,
qb.tracer,
qb.LogicalPlan.InputSchema(),
qb.LogicalPlan,
qb.execOpts...,
)
}
func (qb ProtoQueryBuilder) Explain(ctx context.Context) (string, error) {
phyPlan, err := qb.buildPhysical(ctx)
if err != nil {
return "", err
}
return phyPlan.DrawString(), nil
}