csvindex

Documentation

Overview

This package is still experimental. Don't use.

Index

• type Index
  • func NewIndex() *Index
  • func (i *Index) Import(r io.Reader) (err error)
  • func (i *Index) LookUp(col int, s string, r generic.RandomAccessReader, chain []generic.Transform) (str [][]string, err error)
• type IndexWriter
  • func NewIndexWriter(w io.Writer, i ...int) *IndexWriter
  • func (iw *IndexWriter) AddFrom(r generic.ScanReader, chain []generic.Transform) error
  • func (iw *IndexWriter) AddRecord(rec []string, chunkNo int64, inChunk int) error
  • func (iw *IndexWriter) AddRecords(recs [][]string, chunkNo int64) error

Types

type Index

type Index struct {
	// contains filtered or unexported fields
}

This is a Non-Working Index. Don't use it.

func NewIndex

func NewIndex() *Index

func (*Index) Import

func (i *Index) Import(r io.Reader) (err error)

func (*Index) LookUp

func (i *Index) LookUp(col int, s string, r generic.RandomAccessReader, chain []generic.Transform) (str [][]string, err error)

type IndexWriter

type IndexWriter struct {
	Enc     *msgpack.Encoder
	Indeces []int
}

A Index-Writer. In fact, this is not really an Index. Instead, it is an extract from a Dataset (aka. CSV-Table).

The Index-Writer creates a MSGPACK-stream, that consist of arrays (that are used like tuples).

The format is [ColumnValue,ColumnNumber,ChunkOffset,RecordIndexInChunk].

type object struct{
	_msgpack struct{} `msgpack:",asArray"`
	Content string
	Column  int
	ChunkNo int64
	InChunk int
}

func NewIndexWriter

func NewIndexWriter(w io.Writer, i ...int) *IndexWriter

func (*IndexWriter) AddFrom

func (iw *IndexWriter) AddFrom(r generic.ScanReader, chain []generic.Transform) error

func (*IndexWriter) AddRecord

func (iw *IndexWriter) AddRecord(rec []string, chunkNo int64, inChunk int) error

func (*IndexWriter) AddRecords

func (iw *IndexWriter) AddRecords(recs [][]string, chunkNo int64) error