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simplfy compiler patterns #5425
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,73 @@ | ||
| package compiler | ||
|
|
||
| import ( | ||
| goruntime "runtime" | ||
|
|
||
| "github.com/brimdata/super/compiler/dag" | ||
| "github.com/brimdata/super/compiler/optimizer" | ||
| "github.com/brimdata/super/compiler/parser" | ||
| "github.com/brimdata/super/lake" | ||
| "github.com/brimdata/super/lakeparse" | ||
| "github.com/brimdata/super/pkg/storage" | ||
| "github.com/brimdata/super/runtime" | ||
| "github.com/brimdata/super/runtime/exec" | ||
| "github.com/brimdata/super/zio" | ||
| ) | ||
|
|
||
| var Parallelism = goruntime.GOMAXPROCS(0) //XXX | ||
|
|
||
| type compiler struct { | ||
| env *exec.Environment | ||
| } | ||
|
|
||
| func NewCompiler(local storage.Engine) runtime.Compiler { | ||
| return &compiler{env: exec.NewEnvironment(local, nil)} | ||
| } | ||
|
|
||
| func NewLakeCompiler(lk *lake.Root) runtime.Compiler { | ||
| // We configure a remote storage engine into the lake compiler so that | ||
| // "from" operators that source http or s3 will work, but stdio and | ||
| // file system accesses will be rejected at open time. | ||
| return &compiler{env: exec.NewEnvironment(storage.NewRemoteEngine(), lk)} | ||
| } | ||
|
|
||
| func (c *compiler) NewQuery(rctx *runtime.Context, ast *parser.AST, readers []zio.Reader, parallelism int) (runtime.Query, error) { | ||
| if c.env.IsLake() { | ||
| if parallelism == 0 { | ||
| parallelism = Parallelism | ||
| } | ||
| } | ||
| return CompileWithAST(rctx, ast, c.env, true, parallelism, readers) | ||
| } | ||
|
|
||
| func (l *compiler) NewLakeDeleteQuery(rctx *runtime.Context, ast *parser.AST, head *lakeparse.Commitish) (runtime.DeleteQuery, error) { | ||
| if err := ast.ConvertToDeleteWhere(head.Pool, head.Branch); err != nil { | ||
| return nil, err | ||
| } | ||
| seq := ast.Parsed() | ||
| if len(seq) != 2 { | ||
| return nil, &InvalidDeleteWhereQuery{} | ||
| } | ||
| dagSeq, err := Analyze(rctx, ast, l.env, false) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| if _, ok := dagSeq[1].(*dag.Filter); !ok { | ||
| return nil, &InvalidDeleteWhereQuery{} | ||
| } | ||
| dagSeq, err = optimizer.New(rctx, l.env).OptimizeDeleter(dagSeq, Parallelism) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| outputs, b, err := BuildWithBuilder(rctx, dagSeq, l.env, nil) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return exec.NewDeleteQuery(rctx, bundleOutputs(rctx, outputs), b.Deletes()), nil | ||
| } | ||
|
|
||
| type InvalidDeleteWhereQuery struct{} | ||
|
|
||
| func (InvalidDeleteWhereQuery) Error() string { | ||
| return "invalid delete where query: must be a single filter operation" | ||
| } |
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Nit: Declare this closer to its use.