Documentation ¶
Index ¶
- Variables
- func CopyPuller(w zio.Writer, p Puller) error
- func NamedScanner(s Scanner, name string) *namedScanner
- func NewComparator(zctx *zed.Context, sortKey order.SortKey) *expr.Comparator
- func NewComparatorNullsMax(zctx *zed.Context, sortKey order.SortKey) *expr.Comparator
- func NoControl(r zio.Reader) *noControl
- func PullerReader(p Puller) zio.Reader
- func WriteBatch(zw zio.Writer, batch Batch) error
- type Array
- type Batch
- func NewBatch(arena *zed.Arena, vals []zed.Value, b Batch, vars []zed.Value) Batch
- func NewBatchWithVars(arena *zed.Arena, vals []zed.Value, vars []zed.Value) Batch
- func NewBatchWithVarsAndFree(arena *zed.Arena, vals []zed.Value, vars []zed.Value, free func()) Batch
- func WrapBatch(b Batch, vals []zed.Value) Batch
- type Control
- type EndChannel
- type File
- type Filter
- type Meter
- type MultiStats
- type Progress
- type ProgressReadCloser
- type ProgressReader
- type Puller
- type Scanner
- type ScannerAble
- type SetChannel
Constants ¶
This section is empty.
Variables ¶
var PullerBatchValues = 100
PullerBatchValues is the maximum number of values per batch for a Puller created by NewPuller.
Functions ¶
func NamedScanner ¶
func NewComparator ¶ added in v1.0.0
func NewComparatorNullsMax ¶ added in v1.6.0
func PullerReader ¶
Types ¶
type Array ¶
type Array struct {
// contains filtered or unexported fields
}
Array is a slice of of records that implements the Batch and the Reader interfaces.
func NewArray ¶ added in v1.0.0
XXX this should take the frame arg too and the procs that create new arrays need to propagate their frames downstream.
type Batch ¶
func NewBatchWithVars ¶ added in v1.16.0
func NewBatchWithVarsAndFree ¶ added in v1.16.0
type EndChannel ¶ added in v1.0.0
type EndChannel int
type Meter ¶ added in v1.0.0
type Meter interface {
Progress() Progress
}
A Meter provides Progress statistics.
type MultiStats ¶
type MultiStats []Scanner
func (MultiStats) Progress ¶ added in v1.0.0
func (m MultiStats) Progress() Progress
type Progress ¶ added in v1.0.0
type Progress struct { BytesRead int64 `zed:"bytes_read" json:"bytes_read"` BytesMatched int64 `zed:"bytes_matched" json:"bytes_matched"` RecordsRead int64 `zed:"records_read" json:"records_read"` RecordsMatched int64 `zed:"records_matched" json:"records_matched"` }
Progress represents progress statistics from a Scanner.
type ProgressReadCloser ¶ added in v1.0.0
type ProgressReadCloser interface { zio.ReadCloser Progress() Progress }
func MeterReadCloser ¶ added in v1.0.0
func MeterReadCloser(rc zio.ReadCloser) ProgressReadCloser
type ProgressReader ¶ added in v1.0.0
type Puller ¶
A Puller produces Batches of records, signaling end-of-stream (EOS) by returning a nil Batch and nil error. The done argument to Pull indicates that the stream should be terminated before its natural EOS. An implementation must return EOS in response to a Pull call when the done parameter is true. After seeing EOS, (either via done or its natural end), an implementation of an operator that processes pulled data should respond to additional calls to Pull as if restarting in its initial state. For original sources of data (e.g., the from operator), once EOS is reached, additional calls to Pull after the first EOS should always return EOS. Pull is not safe to call concurrently.
type Scanner ¶
A Scanner is a Batch source that also provides progress updates.
func MultiScanner ¶ added in v1.3.0
type ScannerAble ¶
ScannerAble is implemented by Readers that provide an optimized implementation of the Scanner interface.
type SetChannel ¶ added in v1.0.0
type SetChannel int