nullprinter

Documentation

Index

• Constants
• type NullPrinter
  • func NewNullPrinter(sch schema.Schema) *NullPrinter
  • func NewNullPrinterWithNullString(sch schema.Schema, nullStr string) *NullPrinter
  • func (np *NullPrinter) ProcessRow(inRow row.Row, props pipeline.ReadableMap) (rowData []*pipeline.TransformedRowResult, badRowDetails string)

Constants

const NullPrintingStage = "null printing"

const PrintedNull = "NULL"

Types

type NullPrinter

type NullPrinter struct {
	Sch schema.Schema
	// contains filtered or unexported fields
}

NullPrinter is a utility to convert nil values in rows to a string representation.

func NewNullPrinter

func NewNullPrinter(sch schema.Schema) *NullPrinter

NewNullPrinter returns a new null printer for the schema given, which must be string-typed (untyped).

func NewNullPrinterWithNullString

func NewNullPrinterWithNullString(sch schema.Schema, nullStr string) *NullPrinter

NewNullPrinterWithNullString returns a new null printer for the schema given, which must be string-typed, using the string given as the value to print for nulls.

func (*NullPrinter) ProcessRow

func (np *NullPrinter) ProcessRow(inRow row.Row, props pipeline.ReadableMap) (rowData []*pipeline.TransformedRowResult, badRowDetails string)

Function to convert any nil values for a row with the schema given to a string representation. Used as the transform function in a NamedTransform.