86 lines
2.1 KiB
Go
86 lines
2.1 KiB
Go
package influxql
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import (
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"context"
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"encoding/json"
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"time"
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"github.com/influxdata/flux"
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"github.com/influxdata/flux/lang"
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"github.com/influxdata/flux/plan"
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platform "github.com/influxdata/influxdb/v2"
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)
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const CompilerType = "influxql"
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// AddCompilerMappings adds the influxql specific compiler mappings.
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func AddCompilerMappings(mappings flux.CompilerMappings, dbrpMappingSvc platform.DBRPMappingServiceV2) error {
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return mappings.Add(CompilerType, func() flux.Compiler {
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return NewCompiler(dbrpMappingSvc)
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})
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}
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// Compiler is the transpiler to convert InfluxQL to a Flux specification.
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type Compiler struct {
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Cluster string `json:"cluster,omitempty"`
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DB string `json:"db,omitempty"`
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RP string `json:"rp,omitempty"`
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Bucket string `json:"bucket,omitempty"`
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Query string `json:"query"`
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Now *time.Time `json:"now,omitempty"`
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logicalPlannerOptions []plan.LogicalOption
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dbrpMappingSvc platform.DBRPMappingServiceV2
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}
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var _ flux.Compiler = &Compiler{}
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func NewCompiler(dbrpMappingSvc platform.DBRPMappingServiceV2) *Compiler {
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return &Compiler{
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dbrpMappingSvc: dbrpMappingSvc,
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}
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}
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// Compile transpiles the query into a Program.
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func (c *Compiler) Compile(ctx context.Context, runtime flux.Runtime) (flux.Program, error) {
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var now time.Time
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if c.Now != nil {
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now = *c.Now
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} else {
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now = time.Now()
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}
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transpiler := NewTranspilerWithConfig(
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c.dbrpMappingSvc,
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Config{
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Bucket: c.Bucket,
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Cluster: c.Cluster,
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DefaultDatabase: c.DB,
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DefaultRetentionPolicy: c.RP,
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Now: now,
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},
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)
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astPkg, err := transpiler.Transpile(ctx, c.Query)
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if err != nil {
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return nil, err
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}
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compileOptions := lang.WithLogPlanOpts(c.logicalPlannerOptions...)
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bs, err := json.Marshal(astPkg)
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if err != nil {
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return nil, err
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}
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hdl, err := runtime.JSONToHandle(bs)
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if err != nil {
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return nil, err
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}
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return lang.CompileAST(hdl, runtime, now, compileOptions), nil
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}
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func (c *Compiler) CompilerType() flux.CompilerType {
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return CompilerType
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}
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func (c *Compiler) WithLogicalPlannerOptions(opts ...plan.LogicalOption) {
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c.logicalPlannerOptions = opts
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}
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